Includes.

Make Pixel static.
Clean up comments.
2025-03-01 17:08:44 -05:00 · 2025-03-01 16:49:15 -05:00 · 2025-03-01 16:15:21 -05:00 · 2025-03-01 15:43:40 -05:00 · 2025-03-01 10:34:24 -05:00 · 2025-02-26 19:26:53 -05:00
69 changed files with 12403 additions and 603 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -10,5 +10,5 @@
 **/Makefile
 **/*.cbp
 **/node-modules/
-**/CmakeLists.txt.user
+**/CMakeLists.txt.user
 **/catch2/bin/
--- a/README.md
+++ b/README.md
@@ -2,15 +2,16 @@
 This repository is a collection of useful code snippets and configurations.
-```
+```bash
-github.com/shaunrd0/klips/
+shaunrd0/klips/
 ├── ansible     # Ansible roles, playbooks, and examples
 ├── blockchain  # Blockchain related project templates and examples
 ├── cpp         # C++ programs, datastructures, and other examples
 ├── dotnet      # .NET projects and examples
 ├── esp         # ESP32 projects and examples
 ├── figlet      # Figlet fonts I like :)
 ├── javascript  # Javascript projects and examples
-├── python      # Python scripts or tools I've made   
+├── python      # Python scripts and tools I've made
-├── README.md   
+├── scripts     # Bash scripts
-└── scripts     # Bash scripts
+└── README.md
 ```
--- a/ansible/README.md
+++ b/ansible/README.md
@@ -1,4 +1,4 @@
-# Ansible 
+# ansible
 A few simple roles / plays I've put together in learning how to use Ansible can be found under their corresponding directories.
--- a/blockchain/eth/truffle-solidity/README.md
+++ b/blockchain/eth/truffle-solidity/README.md
@@ -1,3 +1,4 @@
 # blockchain
 A template project for getting started working on the Ethereum blockchain.
 This project comes with basic packages for compiling and deploying Solidity contracts with Truffle.
@@ -72,7 +73,7 @@ I explain how to configure metamask on ropsten on [Knoats - Solidity](https://kn
 Give yourself test Ethereum with the [Ropsten ETH Faucet](https://faucet.ropsten.be)
-To deploy to ropsten test network, and verify using `truffle-verify-plugin` - 
+To deploy to ropsten test network, and verify using `truffle-verify-plugin` -
 ```asm
 npx truffle migrate --network ropsten
--- a/cpp/README.md
+++ b/cpp/README.md
@@ -1,4 +1,4 @@
-# Cpp
+# cpp
 ```bash
 shaunrd0/klips/cpp/
@@ -13,11 +13,11 @@ shaunrd0/klips/cpp/
 └── README.md
 ```
-This directory contains a `CMakeLists.txt`, which can be selected to open as a 
+This directory contains a `CMakeLists.txt`, which can be selected to open as a
 project within your preferred IDE. From there, all nested examples can be built,
 debugged, and ran.
-Some of the more recent projects in this repository requires the latest CMake LTS. 
+Some of the more recent projects in this repository requires the latest CMake LTS.
 To install `cmake` LTS with `apt` we can follow [official instructions from kitware](https://apt.kitware.com/)
 Alternatively, we can install the LTS with python's `pip`.
 ```bash
@@ -34,7 +34,7 @@ cmake version 3.22.1
 Once cmake is installed, dependencies for all examples can be installed with the command below.
 ```bash
-sudo apt install libsdl2-dev freeglut3-dev 
+sudo apt install libsdl2-dev freeglut3-dev
 ```
 If we build from this directory, we build all C++ projects and examples
@@ -63,7 +63,7 @@ graph-test-object            sdl-test              visitor-test
 graph-test-simple            select-sort
 ```
-We can also build from subdirectories. 
+We can also build from subdirectories.
 To only build projects related to design patterns we build from the `patterns/` subdirectory, for example
 ```bash
 cd /path/to/klips/cpp/patterns
@@ -80,5 +80,5 @@ adapter-test           factory-test  prototype-test  state-test
 If cmake is not being used in a project, it can be built with `g++` manually using
 the commands outlined in `*/.vscode/tasks.json`, or by using VSCode to open the example
-and running the build task. 
+and running the build task.
 Check the header comments in the main source file for the example for instructions.
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--- a/cpp/qt/designer/CMakeLists.txt.user
+++ b/cpp/qt/designer/CMakeLists.txt.user
@@ -1,189 +0,0 @@
 <?xml version="1.0" encoding="UTF-8"?>
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--- a/dotnet/README.md
+++ b/dotnet/README.md
@@ -1,4 +1,4 @@
-# Dotnet
+# dotnet
 ```bash
 shaunrd0/klips/dotnet/
--- a/esp/cpp/01_led-button/01_led-button.ino
+++ b/esp/cpp/01_led-button/01_led-button.ino
@@ -0,0 +1,38 @@
 // set pin numbers
 const int buttonPin = 4;  // the number of the pushbutton pin
 const int ledPin =  5;    // the number of the LED pin
 // variable for storing the pushbutton status
 int buttonState = 0;
 bool light_on = false;
 bool handled = false;
 void setup() {
  Serial.begin(115200);
  // initialize the pushbutton pin as an input
  pinMode(buttonPin, INPUT);
  // initialize the LED pin as an output
  pinMode(ledPin, OUTPUT);
 }
 void loop() {
  // read the state of the pushbutton value
  buttonState = digitalRead(buttonPin);
  // check if the pushbutton is pressed.
  if (buttonState == HIGH) {
    if (!handled) {
      Serial.println("Handling button pressed.");
      light_on = !light_on;
      handled = true;
      digitalWrite(ledPin, light_on ? HIGH : LOW);
    }
    // turn LED on
  } else {
    if (handled) {
      Serial.println("Reset button handled state.");
      handled = false;
    }
  }
 }
--- a/esp/cpp/01_led-button/README.md
+++ b/esp/cpp/01_led-button/README.md
@@ -0,0 +1,9 @@
 # 01_led-button
 This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
 The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
 ![schematic](./schematic.png)
 Simple LED controlled by an on-board button.
--- a/esp/cpp/01_led-button/schematic.png
+++ b/esp/cpp/01_led-button/schematic.png
--- a/esp/cpp/02_led-button-web/02_led-button-web.ino
+++ b/esp/cpp/02_led-button-web/02_led-button-web.ino
@@ -0,0 +1,183 @@
 #include <WiFi.h>
 //
 // Web server project globals
 // Replace with your network credentials
 const char* ssid = "network-name";
 const char* password = "password";
 WiFiServer server(80);
 // Variable to store the HTTP request
 String header;
 // Current time
 unsigned long currentTime = millis();
 // Previous time
 unsigned long previousTime = 0;
 // Define timeout time in milliseconds (example: 2000ms = 2s)
 const long timeoutTime = 2000;
 //
 // Button / light project globals
 // set pin numbers
 const int buttonPin = 4;  // the number of the pushbutton pin
 const int ledPin =  5;    // the number of the LED pin
 // variable for storing the pushbutton status
 int buttonState = 0;
 bool light_on = false;
 bool handled = false;
 void setup() {
  Serial.begin(115200);
  // initialize the pushbutton pin as an input
  pinMode(buttonPin, INPUT);
  // initialize the LED pin as an output
  pinMode(ledPin, OUTPUT);
  // wait for the Serial Monitor to be open
  while (!Serial) {
    delay(100);
  }
  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("Web Server IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
 }
 // Handles the on-board button press.
 void handleButtonPress() {
  // read the state of the pushbutton value
  buttonState = digitalRead(buttonPin);
  // check if the pushbutton is pressed.
  if (buttonState == HIGH) {
    if (!handled) {
      Serial.println("Handling button pressed.");
      light_on = !light_on;
      handled = true;
      digitalWrite(ledPin, light_on ? HIGH : LOW);
    }
    // turn LED on
  } else {
    if (handled) {
      Serial.println("Reset button handled state.");
      handled = false;
    }
  }
 }
 void displayPinState(WiFiClient client, int gpio_pin, bool state) {
  // Display current state, and ON/OFF buttons for GPIO <gpio_pin>
  client.println(String("<p>GPIO ") + String(gpio_pin) + String(" - Current State ") + String(state ? "ON" : "OFF") + String("</p>"));
  // If the output state is off, it displays the ON button
  if (state) {
    client.println(String("<p><a href=\"/") + String(gpio_pin) + String("/off\"><button class=\"button button2\">OFF</button></a></p>"));
  } else {
    client.println(String("<p><a href=\"/") + String(gpio_pin) + String("/on\"><button class=\"button\">ON</button></a></p>"));
  }
 }
 void handleStateChange(WiFiClient client, int gpio_pin) {
  if (header.indexOf(String("GET /") + String(gpio_pin) + String("/on")) >= 0) {
    Serial.println(String("GPIO ") + String(gpio_pin) + String(" on"));
    light_on = true;
    digitalWrite(gpio_pin, HIGH);
  } else if (header.indexOf(String("GET /") + String(gpio_pin) + String("/off")) >= 0) {
    Serial.println(String("GPIO ") + String(gpio_pin) + String(" off"));
    light_on = false;
    digitalWrite(gpio_pin, LOW);
  }
 }
 void loop() {
  WiFiClient client = server.available();   // Listen for incoming clients
  handleButtonPress();
  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    Serial.println("Web Server IP address: ");
    Serial.println(WiFi.localIP());
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
      // Also handle the button press in this loop to not miss events.
      handleButtonPress();
      currentTime = millis();
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();
            // turns the GPIOs on and off
            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // CSS to style the on/off buttons
            // Feel free to change the background-color and font-size attributes to fit your preferences
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #555555;}</style></head>");
            //
            // Web Page Heading
            client.println("<body><h1>ESP32 Web Server</h1>");
            //
            // Web Page Body Contents
            // Button Controls
            displayPinState(client, ledPin, light_on);
            //
            // Close Web Page Body / Heading
            client.println("</body></html>");
            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }
 }
--- a/esp/cpp/02_led-button-web/README.md
+++ b/esp/cpp/02_led-button-web/README.md
@@ -0,0 +1,15 @@
 # 02_led-button-web
 This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
 The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
 ![schematic](./schematic.png)
 This example uses the same schematic as [01_led-button](../01_led-button/).
 The only difference is that you can also control the button through a web browser from any device connected to your local network.
 This example was adapted from the example code in the [Arduino ESP32 API reference](https://docs.espressif.com/projects/arduino-esp32/en/latest/api/wifi.html#wi-fi-ap-example).
 ![screenshot](./screenshot.png)
--- a/esp/cpp/02_led-button-web/schematic.png
+++ b/esp/cpp/02_led-button-web/schematic.png
--- a/esp/cpp/02_led-button-web/screenshot.png
+++ b/esp/cpp/02_led-button-web/screenshot.png
--- a/esp/cpp/03_temp-humidity-web/03_temp-humidity-web.ino
+++ b/esp/cpp/03_temp-humidity-web/03_temp-humidity-web.ino
@@ -0,0 +1,161 @@
 // Import required libraries
 #include "WiFi.h"
 #include "ESPAsyncWebServer.h"
 #include <Adafruit_Sensor.h>
 #include <DHT.h>
 // Replace with your network credentials
 const char* ssid = "network-name";
 const char* password = "password";
 #define DHTPIN 4     // Digital pin connected to the DHT sensor
 // Uncomment the type of sensor in use:
 #define DHTTYPE    DHT11     // DHT 11
 //#define DHTTYPE    DHT22     // DHT 22 (AM2302)
 //#define DHTTYPE    DHT21     // DHT 21 (AM2301)
 DHT dht(DHTPIN, DHTTYPE);
 // Create AsyncWebServer object on port 80
 AsyncWebServer server(80);
 String readDHTTemperature() {
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  //float t = dht.readTemperature(true);
  // Check if any reads failed and exit early (to try again).
  if (isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return "--";
  }
  else {
    Serial.println(t);
    return String(t);
  }
 }
 String readDHTHumidity() {
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  if (isnan(h)) {
    Serial.println("Failed to read from DHT sensor!");
    return "--";
  }
  else {
    Serial.println(h);
    return String(h);
  }
 }
 const char index_html[] PROGMEM = R"rawliteral(
 <!DOCTYPE HTML><html>
 <head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
  <style>
    html {
     font-family: Arial;
     display: inline-block;
     margin: 0px auto;
     text-align: center;
    }
    h2 { font-size: 3.0rem; }
    p { font-size: 3.0rem; }
    .units { font-size: 1.2rem; }
    .dht-labels{
      font-size: 1.5rem;
      vertical-align:middle;
      padding-bottom: 15px;
    }
  </style>
 </head>
 <body>
  <h2>ESP32 DHT Server</h2>
  <p>
    <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
    <span class="dht-labels">Temperature</span>
    <span id="temperature">%TEMPERATURE%</span>
    <sup class="units">&deg;C</sup>
  </p>
  <p>
    <i class="fas fa-tint" style="color:#00add6;"></i>
    <span class="dht-labels">Humidity</span>
    <span id="humidity">%HUMIDITY%</span>
    <sup class="units">&percnt;</sup>
  </p>
 </body>
 <script>
 setInterval(function ( ) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("temperature").innerHTML = this.responseText;
    }
  };
  xhttp.open("GET", "/temperature", true);
  xhttp.send();
 }, 10000 ) ;
 setInterval(function ( ) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("humidity").innerHTML = this.responseText;
    }
  };
  xhttp.open("GET", "/humidity", true);
  xhttp.send();
 }, 10000 ) ;
 </script>
 </html>)rawliteral";
 // Replaces placeholder with DHT values
 String processor(const String& var){
  //Serial.println(var);
  if(var == "TEMPERATURE"){
    return readDHTTemperature();
  }
  else if(var == "HUMIDITY"){
    return readDHTHumidity();
  }
  return String();
 }
 void setup(){
  // Serial port for debugging purposes
  Serial.begin(115200);
  dht.begin();
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }
  // Print ESP32 Local IP Address
  Serial.println(WiFi.localIP());
  // Route for root / web page
  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/html", index_html, processor);
  });
  server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/plain", readDHTTemperature().c_str());
  });
  server.on("/humidity", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/plain", readDHTHumidity().c_str());
  });
  // Start server
  server.begin();
 }
 void loop(){
 }
--- a/esp/cpp/03_temp-humidity-web/README.md
+++ b/esp/cpp/03_temp-humidity-web/README.md
@@ -0,0 +1,60 @@
 # 03_temp-humidity-web
 This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
 The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
 ![schematic](./schematic.png)
 Temperature and humidity sensor served on a web page within the local network.
 ![screenshot](./screenshot.png)
 ## Dependencies
 You need to install a couple of libraries for this project:
 * The DHT and the Adafruit Unified Sensor Driver libraries to read from the DHT sensor.
 * ESPAsyncWebServer and Async TCP libraries to build the asynchronous web server.
 The default Arduino IDE installation will store libraries at `~/Arduino/ibraries` - if this directory doesn't exist, create it.
 ### Installing DHT Sensor Library
 To read from the DHT sensor using Arduino IDE, you need to install the [DHT sensor library](https://github.com/adafruit/DHT-sensor-library).
 ```bash
 wget -O DHT_sensor.zip https://github.com/adafruit/DHT-sensor-library/archive/master.zip
 unzip DHT_sensor.zip
 mv DHT-sensor-library-master/ ~/Arduino/libraries/DHT_sensor
 ```
 ## Install Adafruit Unified Sensor Driver Library
 You also need to install the [Adafruit Unified Sensor Driver library](https://github.com/adafruit/Adafruit_Sensor) to work with the DHT sensor.
 ```bash
 wget -O Adafruit_sensor.zip https://github.com/adafruit/Adafruit_Sensor/archive/master.zip
 unzip Adafruit_sensor.zip
 mv Adafruit_Sensor-master/ ~/Arduino/libraries/Adafruit_sensor
 ```
 ## Installing ESPAsyncWebServer Library
 Follow the next steps to install the [ESPAsyncWebServer library](https://github.com/me-no-dev/ESPAsyncWebServer):
 ```bash
 wget -O ESPAsyncWebServer.zip https://github.com/me-no-dev/ESPAsyncWebServer/archive/master.zip
 unzip ESPAsyncWebServer.zip
 mv ESPAsyncWebServer-master/ ~/Arduino/libraries/ESPAsyncWebServer
 ```
 ## Installing Async TCP Library
 The ESPAsyncWebServer library requires the [AsyncTCP library](https://github.com/me-no-dev/AsyncTCP) to work. Follow the next steps to install that library:
 ```bash
 wget -O AsyncTCP.zip https://github.com/me-no-dev/AsyncTCP/archive/master.zip
 unzip AsyncTCP.zip
 mv AsyncTCP-master/ ~/Arduino/libraries/AsyncTCP
 ```
--- a/esp/cpp/03_temp-humidity-web/schematic.png
+++ b/esp/cpp/03_temp-humidity-web/schematic.png
--- a/esp/cpp/03_temp-humidity-web/screenshot.png
+++ b/esp/cpp/03_temp-humidity-web/screenshot.png
--- a/esp/cpp/04_esp-idf-arduino/.gitignore
+++ b/esp/cpp/04_esp-idf-arduino/.gitignore
@@ -0,0 +1,4 @@
 build
 managed_components
 dependencies.lock
 sdkconfig.old
--- a/esp/cpp/04_esp-idf-arduino/CMakeLists.txt
+++ b/esp/cpp/04_esp-idf-arduino/CMakeLists.txt
@@ -0,0 +1,18 @@
 # For more information about build system see
 # https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
 # The following five lines of boilerplate have to be in your project's
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.26)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(
    #[[NAME]]   esp-idf-arduino
    VERSION     0.1
    DESCRIPTION "Example ESP-IDF cmake project"
    LANGUAGES   CXX
 )
 # For writing pure cmake components, see the documentation
 # https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
 idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)
--- a/esp/cpp/04_esp-idf-arduino/README.md
+++ b/esp/cpp/04_esp-idf-arduino/README.md
@@ -0,0 +1,81 @@
 # 04_esp-idf-arduino
 There is no schematic for this example, it simply prints some output to the serial monitor at 115200.
 This is more of a build system example for untethering yourself from the Arduino IDE.
 To build this example you can run the following commands.
 ```bash
 # See Dependencies section below for instructions.
 source ~/path/to/esp-idf/export.sh
 mkdir build
 cd build
 cmake ..
 make -j $(nproc)
 # Flash the example to the ESP.
 make flash
 # Check the serial monitor for 'Hello world!' output.
 idf.py monitor -b 115200
 ```
 To flash to your ESP or access the `idf.py menuconfig` menu from the ESP-IDF you can run the same commands with `make`.
 ```bash
 make flash
 make menuconfig
 ```
 If Ninja is preferred:
 ```bash
 mkdir build
 cd build
 cmake .. -G Nina
 ninja
 ```
 ## Dependencies
 Install the [ESP-IDF](https://github.com/espressif/esp-idf?tab=readme-ov-file#setup-build-environment)
 ```bash
 # https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/get-started/linux-macos-setup.html#for-linux-users
 sudo apt-get install -y git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0
 git clone -b v5.3.2 --recursive https://github.com/espressif/esp-idf
 cd esp-idf
 ./install.sh
 . ./export.sh
 ```
 In CLion there is an official [Serial Monitor](https://plugins.jetbrains.com/plugin/8031-serial-port-monitor) plugin, or use ESP-IDF -
 ```bash
 idf.py monitor -b 115200
 ```
 ## Starting Over
 To set up this project from scratch the following commands were used
 ```bash
 # My example project directory
 cd ~/Code/klips/esp/cpp/04_esp-idf-arduino
 idf.py set-target esp32
 idf.py add-dependency "espressif/arduino-esp32^3.1.1"
 # Autostart Arduino for use of `loop()` and `setup()` functions
 # You can also use the esp-idf `app_main()` function if preferred
 # https://docs.espressif.com/projects/arduino-esp32/en/latest/esp-idf_component.html#configuration
 # You can alternatively do this in the GUI tool `idf.py menuconfig`
 echo "CONFIG_AUTOSTART_ARDUINO=y" >> sdkconfig
 sed -i -e 's/CONFIG_FREERTOS_HZ=100/CONFIG_FREERTOS_HZ=1000/' sdkconfig
 # Build the project
 idf.py build
 ```
 To set this project up in CLion, see [JetBrains documentation](https://www.jetbrains.com/help/clion/esp-idf.html#env-vars).
--- a/esp/cpp/04_esp-idf-arduino/main/CMakeLists.txt
+++ b/esp/cpp/04_esp-idf-arduino/main/CMakeLists.txt
@@ -0,0 +1,4 @@
 idf_component_register(
    SRCS "main.cpp"
    INCLUDE_DIRS "."
 )
--- a/esp/cpp/04_esp-idf-arduino/main/idf_component.yml
+++ b/esp/cpp/04_esp-idf-arduino/main/idf_component.yml
@@ -0,0 +1,17 @@
 ## IDF Component Manager Manifest File
 dependencies:
  ## Required IDF version
  idf:
    version: '>=4.1.0'
  # # Put list of dependencies here
  # # For components maintained by Espressif:
  # component: "~1.0.0"
  # # For 3rd party components:
  # username/component: ">=1.0.0,<2.0.0"
  # username2/component2:
  #   version: "~1.0.0"
  #   # For transient dependencies `public` flag can be set.
  #   # `public` flag doesn't have an effect dependencies of the `main` component.
  #   # All dependencies of `main` are public by default.
  #   public: true
  espressif/arduino-esp32: ^3.1.1
--- a/esp/cpp/04_esp-idf-arduino/main/main.cpp
+++ b/esp/cpp/04_esp-idf-arduino/main/main.cpp
@@ -0,0 +1,10 @@
 #include "Arduino.h"
 void setup() {
  Serial.begin(115200);
 }
 void loop() {
  Serial.println("Hello world!");
  delay(1000);
 }
--- a/esp/cpp/04_esp-idf-arduino/sdkconfig
+++ b/esp/cpp/04_esp-idf-arduino/sdkconfig
--- a/esp/cpp/05_temp-humidity-web/.gitignore
+++ b/esp/cpp/05_temp-humidity-web/.gitignore
@@ -0,0 +1,4 @@
 build
 managed_components
 dependencies.lock
 sdkconfig.old
--- a/esp/cpp/05_temp-humidity-web/CMakeLists.txt
+++ b/esp/cpp/05_temp-humidity-web/CMakeLists.txt
@@ -0,0 +1,18 @@
 # For more information about build system see
 # https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
 # The following five lines of boilerplate have to be in your project's
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.26)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(
    #[[NAME]]   temp-humidity-web
    VERSION     0.1
    DESCRIPTION "Temperature and humidity from DHT sensor served on a web page"
    LANGUAGES   CXX
 )
 # For writing pure cmake components, see the documentation
 # https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
 idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)
--- a/esp/cpp/05_temp-humidity-web/README.md
+++ b/esp/cpp/05_temp-humidity-web/README.md
@@ -0,0 +1,27 @@
 # 05_temp-humidity-web
 This is the same example in [03_temp-humidity-web](./../03_temp-humidity-web), ported to the cmake ESP-IDF build system.
 For instructions on setting up the ESP-IDF see [04_-esp-idf-arduino](./../04_esp-idf-arduino)
 This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
 The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
 ![schematic](./schematic.png)
 Temperature and humidity sensor served on a web page within the local network.
 ![screenshot](./screenshot.png)
 To build this example run the following commands.
 ```bash
 source ~/path/to/esp-idf/export.sh
 mkdir build
 cd build
 cmake ..
 make -j $(nproc)
 make flash
 ```
--- a/esp/cpp/05_temp-humidity-web/main/CMakeLists.txt
+++ b/esp/cpp/05_temp-humidity-web/main/CMakeLists.txt
@@ -0,0 +1,4 @@
 idf_component_register(
    SRCS "main.cpp"
    INCLUDE_DIRS "."
 )
--- a/esp/cpp/05_temp-humidity-web/main/idf_component.yml
+++ b/esp/cpp/05_temp-humidity-web/main/idf_component.yml
@@ -0,0 +1,19 @@
 ## IDF Component Manager Manifest File
 dependencies:
  ## Required IDF version
  idf:
    version: '>=4.1.0'
  # # Put list of dependencies here
  # # For components maintained by Espressif:
  # component: "~1.0.0"
  # # For 3rd party components:
  # username/component: ">=1.0.0,<2.0.0"
  # username2/component2:
  #   version: "~1.0.0"
  #   # For transient dependencies `public` flag can be set.
  #   # `public` flag doesn't have an effect dependencies of the `main` component.
  #   # All dependencies of `main` are public by default.
  #   public: true
  espressif/arduino-esp32: ^3.1.1
  zorxx/dht: ^1.0.1
  esp32async/espasyncwebserver: ^3.7.0~1
--- a/esp/cpp/05_temp-humidity-web/main/main.cpp
+++ b/esp/cpp/05_temp-humidity-web/main/main.cpp
@@ -0,0 +1,189 @@
 #include "WiFi.h"
 #include "ESPAsyncWebServer.h"
 #include "main.h"
 // Replace with your network credentials
 const char *ssid = "wifi";
 const char *password = "password";
 #define DHTPIN GPIO_NUM_4  // Digital pin connected to the DHT sensor
 // Uncomment the type of sensor in use:
 #define DHTTYPE      DHT_TYPE_DHT11  // DHT 11
 //#define DHTTYPE    DHT_TYPE_DHT22  // DHT 22 (AM2302)
 //#define DHTTYPE    DHT_TYPE_DHT21  // DHT 21 (AM2301)
 float DHT::readTemperature(bool f)
 {
  float humidity = 0;
  float temperature = 0;
  esp_err_t result = dht_read_float_data(type_, gpio_, &humidity,
                                         &temperature);
  if (result == ESP_OK) {
    ESP_LOGI("[DHT::readTemperature]", "Humidity: %.1f%% Temperature: %.1f°C",
             humidity,
             temperature);
  } else {
    ESP_LOGE("[DHT::readTemperature]", "Failed to read sensor data: %s",
             esp_err_to_name(result));
  }
  return f ? (temperature * 1.8f) + 32 : temperature;
 }
 float DHT::readHumidity()
 {
  float humidity = 0;
  float temperature = 0;
  esp_err_t result = dht_read_float_data(type_, gpio_, &humidity,
                                         &temperature);
  if (result == ESP_OK) {
    ESP_LOGI("[DHT::readTemperature]", "Humidity: %.1f%% Temperature: %.1f°C",
             humidity,
             temperature);
  } else {
    ESP_LOGE("[DHT::readTemperature]", "Failed to read sensor data: %s",
             esp_err_to_name(result));
  }
  return humidity;
 }
 DHT dht(DHTPIN, DHTTYPE);
 // Create AsyncWebServer object on port 80
 AsyncWebServer server(80);
 String readDHTTemperature()
 {
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float t = dht.readTemperature();
  // Check if any reads failed and exit early (to try again).
  if (isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return "--";
  } else {
    Serial.println(t);
    return String(t);
  }
 }
 String readDHTHumidity()
 {
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  if (isnan(h)) {
    Serial.println("Failed to read from DHT sensor!");
    return "--";
  } else {
    Serial.println(h);
    return String(h);
  }
 }
 const char index_html[] PROGMEM = R"rawliteral(
 <!DOCTYPE HTML><html>
 <head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
  <style>
    html {
     font-family: Arial;
     display: inline-block;
     margin: 0px auto;
     text-align: center;
    }
    h2 { font-size: 3.0rem; }
    p { font-size: 3.0rem; }
    .units { font-size: 1.2rem; }
    .dht-labels{
      font-size: 1.5rem;
      vertical-align:middle;
      padding-bottom: 15px;
    }
  </style>
 </head>
 <body>
  <h2>ESP32 DHT Server</h2>
  <p>
    <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
    <span class="dht-labels">Temperature</span>
    <span id="temperature">%TEMPERATURE%</span>
    <sup class="units">&deg;C</sup>
  </p>
  <p>
    <i class="fas fa-tint" style="color:#00add6;"></i>
    <span class="dht-labels">Humidity</span>
    <span id="humidity">%HUMIDITY%</span>
    <sup class="units">&percnt;</sup>
  </p>
 </body>
 <script>
 setInterval(function ( ) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("temperature").innerHTML = this.responseText;
    }
  };
  xhttp.open("GET", "/temperature", true);
  xhttp.send();
 }, 10000 ) ;
 setInterval(function ( ) {
  var xhttp = new XMLHttpRequest();
  xhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("humidity").innerHTML = this.responseText;
    }
  };
  xhttp.open("GET", "/humidity", true);
  xhttp.send();
 }, 10000 ) ;
 </script>
 </html>)rawliteral";
 // Replaces placeholder with DHT values
 String processor(const String &var)
 {
  //Serial.println(var);
  if (var == "TEMPERATURE") {
    return readDHTTemperature();
  } else if (var == "HUMIDITY") {
    return readDHTHumidity();
  }
  return String();
 }
 void setup()
 {
  // Serial port for debugging purposes
  Serial.begin(115200);
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }
  // Print ESP32 Local IP Address
  Serial.println(WiFi.localIP());
  // Route for root / web page
  server.on("/", HTTP_GET, [ ](AsyncWebServerRequest *request) {
    request->send(200, "text/html", index_html, processor);
  });
  server.on("/temperature", HTTP_GET, [ ](AsyncWebServerRequest *request) {
    request->send(200, "text/plain", readDHTTemperature().c_str());
  });
  server.on("/humidity", HTTP_GET, [ ](AsyncWebServerRequest *request) {
    request->send(200, "text/plain", readDHTHumidity().c_str());
  });
  // Start server
  server.begin();
 }
 void loop()
 {
 }
--- a/esp/cpp/05_temp-humidity-web/main/main.h
+++ b/esp/cpp/05_temp-humidity-web/main/main.h
@@ -0,0 +1,33 @@
 #ifndef  MAIN_H
 #define  MAIN_H
 #include <cstdint>
 #include "dht.h"
 class DHT {
 public:
  DHT(gpio_num_t gpio, dht_sensor_type_t type) :
      gpio_(gpio), type_(type) { }
  ~DHT() = default;
  /**
   * Read temperature from DHT sensor
   *
   * @param f True to return in Fahrenheit, False for Celsius.
   */
  float readTemperature(bool f = true);
  /**
   * Read humidity from DHT sensor.
   */
  float readHumidity();
 private:
  gpio_num_t gpio_;
  dht_sensor_type_t type_;
 };
 #endif // MAIN_H
--- a/esp/cpp/05_temp-humidity-web/schematic.png
+++ b/esp/cpp/05_temp-humidity-web/schematic.png
--- a/esp/cpp/05_temp-humidity-web/screenshot.png
+++ b/esp/cpp/05_temp-humidity-web/screenshot.png
--- a/esp/cpp/05_temp-humidity-web/sdkconfig
+++ b/esp/cpp/05_temp-humidity-web/sdkconfig
--- a/esp/cpp/06_i2c-scanner/.gitignore
+++ b/esp/cpp/06_i2c-scanner/.gitignore
@@ -0,0 +1,4 @@
 build
 managed_components
 dependencies.lock
 sdkconfig.old
--- a/esp/cpp/06_i2c-scanner/CMakeLists.txt
+++ b/esp/cpp/06_i2c-scanner/CMakeLists.txt
@@ -0,0 +1,17 @@
 # For more information about build system see
 # https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
 # The following five lines of boilerplate have to be in your project's
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.26)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(
    #[[NAME]]   i2c-scanner
    VERSION     0.1
    DESCRIPTION "Simple I2C device scanner"
    LANGUAGES   CXX
 )
 # For writing pure cmake components, see the documentation
 # https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
 idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)
--- a/esp/cpp/06_i2c-scanner/README.md
+++ b/esp/cpp/06_i2c-scanner/README.md
@@ -0,0 +1,32 @@
 # 06_i2c-scanner
 ![schematic](./schematic.png)
 Simple I2C device scanner.
 For this example I used this [SSD1306 OLED display](https://www.digikey.com/en/products/detail/winstar-display/WEA012864DWPP3N00003/20533255).
 To build the example run the following commands.
 ```bash
 source ~/path/to/esp-idf/export.sh
 mkdir build
 cd build
 cmake ..
 make -j $(nproc)
 # Flash to ESP32
 make flash
 # Open Serial Monitor, press CTRL+] to exit.
 make monitor
 ```
 Expected output in serial monitor at 115200 baud
 ```bash
 Scanning I2C devices...
 [0x3c]: Device found with clock rate 100000 and timeout 50
 Done.
 ```
--- a/esp/cpp/06_i2c-scanner/main/CMakeLists.txt
+++ b/esp/cpp/06_i2c-scanner/main/CMakeLists.txt
@@ -0,0 +1,4 @@
 idf_component_register(
    SRCS "main.cpp"
    INCLUDE_DIRS "."
 )
--- a/esp/cpp/06_i2c-scanner/main/idf_component.yml
+++ b/esp/cpp/06_i2c-scanner/main/idf_component.yml
@@ -0,0 +1,17 @@
 ## IDF Component Manager Manifest File
 dependencies:
  ## Required IDF version
  idf:
    version: '>=5.3.0'
  # # Put list of dependencies here
  # # For components maintained by Espressif:
  # component: "~1.0.0"
  # # For 3rd party components:
  # username/component: ">=1.0.0,<2.0.0"
  # username2/component2:
  #   version: "~1.0.0"
  #   # For transient dependencies `public` flag can be set.
  #   # `public` flag doesn't have an effect dependencies of the `main` component.
  #   # All dependencies of `main` are public by default.
  #   public: true
  espressif/arduino-esp32: ^3.1.1
--- a/esp/cpp/06_i2c-scanner/main/main.cpp
+++ b/esp/cpp/06_i2c-scanner/main/main.cpp
@@ -0,0 +1,35 @@
 #include "Arduino.h"
 #include "Wire.h"
 [[maybe_unused]] static const char *TAG = "i2c-scanner";
 void i2c_scan()
 {
  uint8_t device_num = 0;
  Serial.println("Scanning I2C devices...");
  for (byte address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    byte error = Wire.endTransmission();
    if (error == 0) {
      Serial.printf(
          "[0x%.2x]: Device found with clock rate %lu and timeout %u\n",
          address,
          Wire.getClock(), Wire.getTimeOut());
      device_num++;
    } else if (error == 4) {
      Serial.printf("[0x%.2x]: Unknown error.\n", address);
    }
  }
  Serial.println(device_num > 0 ? "Done.\n" : "No I2C devices found.\n");
 }
 void setup()
 {
  Serial.begin(115200);
  Wire.begin();
 }
 void loop()
 {
  i2c_scan();
 }
--- a/esp/cpp/06_i2c-scanner/schematic.png
+++ b/esp/cpp/06_i2c-scanner/schematic.png
--- a/esp/cpp/06_i2c-scanner/sdkconfig
+++ b/esp/cpp/06_i2c-scanner/sdkconfig
--- a/esp/cpp/07_lcd-panel-i2c/.gitignore
+++ b/esp/cpp/07_lcd-panel-i2c/.gitignore
@@ -0,0 +1,4 @@
 build
 managed_components
 dependencies.lock
 sdkconfig.old
--- a/esp/cpp/07_lcd-panel-i2c/CMakeLists.txt
+++ b/esp/cpp/07_lcd-panel-i2c/CMakeLists.txt
@@ -0,0 +1,17 @@
 # For more information about build system see
 # https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
 # The following five lines of boilerplate have to be in your project's
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.26)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(
    #[[NAME]]   lcd-panel-i2c
    VERSION     0.1
    DESCRIPTION "Using the SSD1306 LCD display with ESP-IDF and LVGL over I2C"
    LANGUAGES   CXX
 )
 # For writing pure cmake components, see the documentation
 # https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
 idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)
--- a/esp/cpp/07_lcd-panel-i2c/README.md
+++ b/esp/cpp/07_lcd-panel-i2c/README.md
@@ -0,0 +1,27 @@
 # 07_lcd-panel-i2c
 Using the ESP IDF for drawing to a LCD screen over I2C.
 [ESP IDF - I2C](https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/api-reference/peripherals/i2c.html)
 [ESP IDF - LCD](https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/api-reference/peripherals/lcd/index.html)
 [ESP IDF - FreeRTOS](https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/api-reference/system/freertos.html)
 ![schematic](./schematic.png)
 ![example](./example.gif)
 For instructions on setting up the ESP-IDF see [04_-esp-idf-arduino](./../04_esp-idf-arduino)
 To build this example run the following commands.
 ```bash
 source ~/path/to/esp-idf/export.sh
 mkdir build
 cd build
 cmake ..
 make -j $(nproc)
 make flash
 ```
--- a/esp/cpp/07_lcd-panel-i2c/example.gif
+++ b/esp/cpp/07_lcd-panel-i2c/example.gif
--- a/esp/cpp/07_lcd-panel-i2c/main/CMakeLists.txt
+++ b/esp/cpp/07_lcd-panel-i2c/main/CMakeLists.txt
@@ -0,0 +1,7 @@
 idf_component_register(
    SRCS
    main.cpp display.cpp panel_device.cpp scoped_lock.cpp
    i2c.h time_keeper.h panel.h ssd1306.h
    INCLUDE_DIRS .
    REQUIRES driver
 )
--- a/esp/cpp/07_lcd-panel-i2c/main/display.cpp
+++ b/esp/cpp/07_lcd-panel-i2c/main/display.cpp
@@ -0,0 +1,56 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #include <lv_init.h>
 #include "display.h"
 // Static TimeKeeper for managing ESP timers across all displays.
 TimeKeeper Display::timers_;
 Display::Display(IPanelDevice &device) :
    panel_(device)
 {
  if (!lv_is_initialized()) {
    ESP_LOGI(TAG, "Initialize LVGL");
    lv_init();
  }
  ESP_LOGI(TAG, "Creating LVGL display");
  lv_display_ = panel_.device_->create_display();
  // associate the i2c panel handle to the display
  lv_display_set_user_data(lv_display_, panel_.esp_panel_);
  panel_.register_display_callbacks(lv_display_);
 }
 void Display::set_text(const char *text,
                       const char *name,
                       lv_label_long_mode_t long_mode,
                       lv_align_t align)
 {
  // Lock the mutex due to the LVGL APIs are not thread-safe.
  ScopedLock lock;
  ESP_LOGI(TAG, "Display LVGL Scroll Text");
  lv_obj_t *scr = lv_display_get_screen_active(lv_display_);
  // Create the label if it's `name` doesn't already exist in the map keys.
  if (!lv_objects_.count(name)) {
    lv_objects_[name] = lv_label_create(scr);
  }
  auto obj = lv_objects_[name];
  // Set text and long mode.
  lv_label_set_long_mode(obj, long_mode);
  lv_label_set_text(obj, text);
  // Set the size of the screen.
  // If you use rotation 90 or 270 use lv_display_get_vertical_resolution.
  lv_obj_set_width(obj, lv_display_get_horizontal_resolution(lv_display_));
  lv_obj_align(obj, align, 0, 0);
 }
--- a/esp/cpp/07_lcd-panel-i2c/main/display.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/display.h
@@ -0,0 +1,114 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef DISPLAY_H
 #define DISPLAY_H
 #include <widgets/label/lv_label.h>
 #include <unordered_map>
 #include "time_keeper.h"
 #include "panel.h"
 #include "scoped_lock.h"
 /**
 * Encapsulates lv_display handle and related LVGL operations.
 * Contains helper methods that wrap basic LVGL operations such as drawing text.
 * The underlying lv_display can be obtained for manual LVGL operations.
 * @sa ScopedLock
 * @sa Display::get()
 */
 class Display {
 public:
  /**
   * Construct a new Display using an object that implements IPanelDevice.
   *
   * @param device An object that implements the IPanelDevice interface.
   */
  explicit Display(IPanelDevice &device);
  ~Display() = default;
  Display(const Display &) = delete;
  Display(Display &) = delete;
  Display &operator=(Display &) = delete;
  using lv_display_handle_t = lv_display_t *;
  //
  // GETTERS
  /**
   * Getter for accessing LVGL display handle.
   *
   * @sa ScopedLock for calling custom LVGL API's not implemented by Display.
   */
  [[nodiscard]] inline lv_display_handle_t get() const { return lv_display_; }
  /**
   * Getter for accessing LVGL display handle.
   *
   * @sa ScopedLock for calling custom LVGL API's not implemented by Display.
   */
  [[nodiscard]] inline lv_display_handle_t get() { return lv_display_; }
  /// Dereference operator for accessing LVGL display handle.
  [[nodiscard]] inline lv_display_handle_t operator*() const { return get(); }
  /// Dereference operator for accessing LVGL display handle.
  [[nodiscard]] inline lv_display_handle_t operator*() { return get(); }
  //
  // LVGL OPERATIONS
  /**
   * Create a LVGL label with some given text on the current display.
   * The name of the object can be reused to change text on this label later.
   *
   * @param text Text to write to the display.
   * @param name Name for the LVGL label object associated with this text.
   * @param long_mode LVGL long mode for text wider than the current display.
   * @param align LVGL alignment to use for placing the label on the display.
   */
  void set_text(const char *text,
                const char *name,
                lv_label_long_mode_t long_mode = LV_LABEL_LONG_SCROLL_CIRCULAR,
                lv_align_t align = LV_ALIGN_TOP_MID);
  //
  // PUBLIC STATIC MEMBERS
  /// Public static TimeKeeper for managing ESP timers across all displays.
  static TimeKeeper timers_;
 private:
  //
  // PRIVATE MEMBERS
  /// Panel associated with this Display.
  Panel panel_;
  /// LVGL display handle.
  lv_display_handle_t lv_display_;
  /**
   * LVGL object handles stored in the LVGL screen associated with this Display.
   *
   * @sa Display::set_text
   * @sa lv_display_get_screen_active
   */
  std::unordered_map<const char *, lv_obj_t *> lv_objects_;
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "Display";
 };
 #endif // DISPLAY_H
--- a/esp/cpp/07_lcd-panel-i2c/main/i2c.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/i2c.h
@@ -0,0 +1,91 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef I2C_H
 #define I2C_H
 #define I2C_BUS_PORT  0
 #include <driver/i2c_master.h>
 /**
 * Encapsulates ESP I2C creation and usage.
 */
 struct I2C {
  /**
   * Construct and initialize an ESP I2C master bus.
   * An I2C constructor may only be called one time in any application.
   *
   * @param sda GPIO pin number for SDA
   * @param scl GPIO pin number for SCL
   * @param rst GPIO pin number for RST
   */
  I2C(gpio_num_t sda, gpio_num_t scl, int rst = -1) :
      I2C((i2c_master_bus_config_t) {
              .i2c_port = I2C_BUS_PORT,
              .sda_io_num = sda,
              .scl_io_num = scl,
              .clk_source = I2C_CLK_SRC_DEFAULT,
              .glitch_ignore_cnt = 7,
              .flags {
                  .enable_internal_pullup = true,
              },
          },
          rst
      ) { }
  /**
   * Construct an ESP I2C master bus given a specific ESP I2C configuration.
   * An I2C constructor may only be called one time in any application.
   *
   * @param config ESP I2C master bus configuration.
   * @param rst GPIO pin number for RST
   */
  explicit I2C(i2c_master_bus_config_t config, int rst = -1) :
      esp_bus_config_(config),
      rst_num_(rst)
  {
    i2c_master_bus_handle_t i2c;
    ESP_LOGI(TAG, "Initializing new master I2C bus");
    ESP_ERROR_CHECK(i2c_new_master_bus(&esp_bus_config_, &i2c));
  }
  ~I2C() = default;
  //
  // GETTERS
  /**
   * ESP I2C master bus handle getter.
   * This will fail if an I2C instance was never constructed.
   */
  static i2c_master_bus_handle_t get()
  {
    i2c_master_bus_handle_t i2c = nullptr;
    ESP_ERROR_CHECK(i2c_master_get_bus_handle(0, &i2c));
    return i2c;
  }
  //
  // PUBLIC MEMBERS
  /// ESP I2C master bus configuration used during initialization.
  i2c_master_bus_config_t esp_bus_config_;
  /// RST GPIO pin number.
  int rst_num_;
 private:
  //
  // PRIVATE MEMBERS
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "I2C";
 };
 #endif //I2C_H
--- a/esp/cpp/07_lcd-panel-i2c/main/idf_component.yml
+++ b/esp/cpp/07_lcd-panel-i2c/main/idf_component.yml
@@ -0,0 +1,6 @@
 ## IDF Component Manager Manifest File
 dependencies:
  idf: '>=5.3.0'
  espressif/arduino-esp32: ^3.1.1
  lvgl/lvgl: "9.2.0"
  esp_lcd_sh1107: "^1"
--- a/esp/cpp/07_lcd-panel-i2c/main/main.cpp
+++ b/esp/cpp/07_lcd-panel-i2c/main/main.cpp
@@ -0,0 +1,41 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #include "display.h"
 #include "ssd1306.h"
 // Pin may vary based on your schematic.
 #define PIN_SDA                GPIO_NUM_21
 #define PIN_SCL                GPIO_NUM_22
 #define PIN_RST                (-1)
 I2C i2c(PIN_SDA, PIN_SCL, PIN_RST);
 void setup()
 {
  SSD1306 ssd1306(i2c);
  Display d(ssd1306);
  d.set_text("Test test 12345678910",
             "test-text1",
             LV_LABEL_LONG_SCROLL,
             LV_ALIGN_CENTER);
  d.set_text("Test test changing text",
             "test-text1",
             LV_LABEL_LONG_SCROLL,
             LV_ALIGN_CENTER);
  d.set_text("Hello hello hello hello hello hello hello hello!", "test-text2");
  d.set_text("A random sentence with no meaning at all.",
             "test-text3",
             LV_LABEL_LONG_CLIP,
             LV_ALIGN_BOTTOM_MID);
 }
 void loop() { }
--- a/esp/cpp/07_lcd-panel-i2c/main/panel.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/panel.h
@@ -0,0 +1,87 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef PANEL_H
 #define PANEL_H
 #include "panel_device.h"
 /**
 * Encapsulates esp_lcd_panel handles and operations.
 * The only exception is esp_lcd_panel_io_i2c_config_t owned by IPanelDevice.
 * This structure requires details specific to the implementing device.
 *
 * Panel is an implementation detail of Display, not meant to be used directly.
 */
 struct Panel {
  /**
   * Construct a new Panel using an object that implements IPanelDevice.
   *
   * @param device An object that implements the IPanelDevice interface.
   */
  explicit Panel(IPanelDevice &device) :
      device_(&device),
      esp_io_(nullptr),
      esp_panel_(nullptr),
      esp_panel_config_(
          (esp_lcd_panel_dev_config_t) {
              .reset_gpio_num = device_->rst_num_,
              .bits_per_pixel = 1,
              .vendor_config = device_->vendor_config(),
          }
      )
  {
    esp_io_ = device_->create_io_handle();
    device_->create_panel(esp_panel_config_, esp_io_, esp_panel_);
    ESP_LOGI(TAG, "Resetting panel display");
    ESP_ERROR_CHECK(esp_lcd_panel_reset(esp_panel_));
    ESP_LOGI(TAG, "Initializing panel display");
    ESP_ERROR_CHECK(esp_lcd_panel_init(esp_panel_));
    ESP_LOGI(TAG, "Turning on panel display");
    ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(esp_panel_, true));
  }
  ~Panel() = default;
  //
  // PUBLIC MEMBERS
  /// Pointer to object using known interface for IPanelDevice.
  IPanelDevice *device_;
  /// ESP LCD panel IO handle.
  esp_lcd_panel_io_handle_t esp_io_;
  /// ESP LCD panel handle.
  esp_lcd_panel_handle_t esp_panel_;
  /// ESP LCD panel configuration structure.
  esp_lcd_panel_dev_config_t esp_panel_config_;
  /**
   * Registers LVGL draw buffers and callbacks for rendering the display.
   *
   * @param display_handle Pointer to the LVGL display to use for rendering.
   */
  inline void register_display_callbacks(lv_display_t *display_handle) const
  {
    device_->register_rendering_data(display_handle, esp_io_);
    device_->register_lvgl_tick_timer();
  }
 private:
  //
  // PRIVATE MEMBERS
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "Panel";
 };
 #endif //PANEL_H
--- a/esp/cpp/07_lcd-panel-i2c/main/panel_device.cpp
+++ b/esp/cpp/07_lcd-panel-i2c/main/panel_device.cpp
@@ -0,0 +1,145 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #include "panel_device.h"
 #include "display.h"
 bool IPanelDevice::lvgl_flush_ready_cb(esp_lcd_panel_io_handle_t,
                                       esp_lcd_panel_io_event_data_t *,
                                       void *user_ctx)
 {
  auto *disp = (lv_display_t *) user_ctx;
  lv_display_flush_ready(disp);
  return false;
 }
 void IPanelDevice::lvgl_flush_cb(lv_display_t *display, const lv_area_t *area,
                                 uint8_t *px_map) // NOLINT(*-non-const-parameter)
 {
  auto panel_handle =
      (esp_lcd_panel_handle_t) lv_display_get_user_data(display);
  // Necessary because LVGL reserves 2x4 bytes in the buffer for a palette.
  // Since we are monochrome, we don't need these additional bytes.
  // For more information about the monochrome, please refer to:
  // https://docs.lvgl.io/9.2/porting/display.html#monochrome-displays
  // Skip the palette here.
  px_map += LVGL_PALETTE_SIZE;
  uint16_t hor_res = lv_display_get_physical_horizontal_resolution(display);
  int32_t x1 = area->x1;
  int32_t x2 = area->x2;
  int32_t y1 = area->y1;
  int32_t y2 = area->y2;
  // As of 03/01/2025 master branch of LVGL contains this helper for the same.
  // https://docs.lvgl.io/master/API/draw/sw/lv_draw_sw_utils.html
  // lv_draw_sw_i1_convert_to_vtiled()
  for (int32_t y = y1; y <= y2; y++) {
    for (int32_t x = x1; x <= x2; x++) {
      // Get the byte offset of the pixel coordinates using horizontal-mapping.
      int h_offset = Pixel::horizontal_byte_offset(x, y, hor_res);
      // True if the pixel is lit, else false.
      bool chroma_color = px_map[h_offset] & Pixel::msb_mask(x);
      // We need an additional buffer for transposing the pixel data to the
      // vertical format required by the display driver.
      uint8_t *buf = IPanelDevice::get_additional_draw_buffer();
      // Move to the position in the auxillary buffer where the pixel is stored.
      buf += Pixel::vertical_byte_offset(x, y, hor_res);
      // Write the single bit to the monochrome display mapped vertically.
      // Take the Least Significant Bit mask of the Y coordinate to select the
      // bit representing a pixel at position y in a vertically-mapped display.
      if (chroma_color) {
        // Set the vertically-mapped pixel to on.
        *buf &= ~Pixel::lsb_mask(y);
      } else {
        // Set the vertically-mapped pixel to off.
        *buf |= Pixel::lsb_mask(y);
      }
    }
  }
  // Pass the draw buffer to the driver.
  ESP_ERROR_CHECK(
      esp_lcd_panel_draw_bitmap(panel_handle, x1, y1, x2 + 1, y2 + 1,
                                IPanelDevice::get_additional_draw_buffer()));
 }
 void IPanelDevice::lvgl_increase_tick_cb(void *)
 {
  // Tell LVGL how many milliseconds has elapsed
  lv_tick_inc(LVGL_TICK_PERIOD_MS);
 }
 [[noreturn]] void IPanelDevice::lvgl_port_task(void *)
 {
  // Optionally initialize some LVGL objects here before entering loop below.
  ESP_LOGI(TAG, "Starting LVGL task");
  for (uint32_t time_to_next_ms = 0; true; usleep(1000 * time_to_next_ms)) {
    // Obtain LVGL API lock before calling any LVGL methods.
    ScopedLock lock;
    // Optionally handle LVGL input or event logic here.
    // Update LVGL periodic timers.
    time_to_next_ms = lv_timer_handler();
  }
 }
 void IPanelDevice::register_rendering_data(lv_display_t *display_handle,
                                           esp_lcd_panel_io_handle_t io_handle)
 {
  // Create draw buffer.
  ESP_LOGI(TAG, "Allocate separate LVGL draw buffers");
  lv_buf_ = heap_caps_calloc(1, lv_buf_size_,
                             MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
  assert(lv_buf_);
  ESP_LOGI(TAG, "Set LVGL draw buffers");
  // Color format must be set first, LVGL9 suooprt new monochromatic format.
  lv_display_set_color_format(display_handle, LV_COLOR_FORMAT_I1);
  lv_display_set_buffers(display_handle, lv_buf_, nullptr,
                         lv_buf_size_,
                         LV_DISPLAY_RENDER_MODE_FULL);
  lv_display_set_rotation(display_handle, LV_DISPLAY_ROTATION_0);
  ESP_LOGI(TAG, "Set LVGL callback for flushing to the display");
  lv_display_set_flush_cb(display_handle, IPanelDevice::lvgl_flush_cb);
  ESP_LOGI(TAG, "Register io panel callback for LVGL flush ready notification");
  const esp_lcd_panel_io_callbacks_t cbs = {
      .on_color_trans_done = IPanelDevice::lvgl_flush_ready_cb,
  };
  ESP_ERROR_CHECK(
      esp_lcd_panel_io_register_event_callbacks(io_handle, &cbs,
                                                display_handle));
 }
 void IPanelDevice::register_lvgl_tick_timer()
 {
  ESP_LOGI(TAG, "Use esp_timer to increase LVGL tick");
  const esp_timer_create_args_t esp_timer_args = {
      .callback = &IPanelDevice::lvgl_increase_tick_cb,
      // Data to pass to the IPanelDevice::lvgl_port_task callback.
      .arg = nullptr,
      .name = "lvgl_tick",
  };
  Display::timers_.start_new_timer_periodic(esp_timer_args,
                                            LVGL_TICK_PERIOD_MS * 1000);
  // LVGL requires a FreeRTOS task for running it's event loop.
  // The lvgl_port_task callback can update the UI or handle input logic.
  // For this basic example we don't do either of these things.
  ESP_LOGI(TAG, "Create LVGL FreeRTOS task");
  // Optionally set user data to pass to LVGL's FreeRTOS task callback here.
  void *user_data = nullptr;
  xTaskCreate(lvgl_port_task, "LVGL", LVGL_TASK_STACK_SIZE,
              user_data, LVGL_TASK_PRIORITY, nullptr);
 }
--- a/esp/cpp/07_lcd-panel-i2c/main/panel_device.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/panel_device.h
@@ -0,0 +1,428 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef PANEL_DEVICE_H
 #define PANEL_DEVICE_H
 #include <esp_lcd_panel_dev.h>
 #include <esp_lcd_panel_ops.h>
 #include <esp_lcd_panel_io.h>
 #include <esp_log.h>
 #include <display/lv_display.h>
 #include "i2c.h"
 // LVGL reserves 2x4 bytes in the buffer to be used as a palette.
 // This additional space must be added to the IPanelDevice::buf_size_.
 #define LVGL_PALETTE_SIZE      8
 #define LVGL_TICK_PERIOD_MS    5
 #define LVGL_TASK_STACK_SIZE   (4 * 1024)
 #define LVGL_TASK_PRIORITY     2
 #define LCD_H_RES              128
 #define LCD_V_RES              64
 /**
 * Wraps some foundational operations performed on pixel coordinates when
 * dealing with pointer arithmetic. Most of these could be done ad-hoc as needed
 * but using this helper reduces the risk of errors.
 */
 struct Pixel {
  /**
   * Calculate byte offset for the pixel at [x,y] within a horizontally-mapped
   * monochrome uint8 draw buffer, using the initialized horizontal resolution.
   *
   * We use `>> 3` because each pixel requires 1 bit, but each uint8 in the draw
   * buffer can hold 8 bits. To find the uint8 value in our draw buffer that
   * stores this pixel's value we must compensate for this when using pixel
   * coordinates in byte math.
   *
   * Therefore, each uint8 in the draw buffer stores the state of 8 pixels.
   * Below is an example of calculating for [x, y] pixel coordinates [20, 10].
   *
   * For the horizontal case, each row (y_) of the image is represented by
   * `hor_res_ >> 3` bytes (16). The byte-offset of the first pixel in the 10th
   * row for example is `16 * 10` = 160.
   *
   * Since the pixels are stored horizontally we must calculate the 20th pixel
   * column (x_) as `160 + (20 >> 3)`, or `160 + (20 / 8)` to get a final offset
   * of 162.
   *
   * @param x X pixel coordinate to find byte offset.
   * @param y Y pixel coordinate to find byte offset.
   * @return byte offset for a single-byte monochrome pixel at [x,y].
   */
  [[maybe_unused]] [[nodiscard]] static ptrdiff_t
  horizontal_byte_offset(const int32_t &x, const int32_t &y, const int32_t& hor_res)
  {
    // Convert pixel (bit) coordinates to byte coordinates in the draw buffer.
    return (hor_res >> 3) * y + (x >> 3);
  }
  /**
   * Calculate byte offset for the pixel at [x,y] within a vertically-mapped
   * monochrome uint8 draw buffer, using the initialized horizontal resolution.
   *
   * We use `>> 3` because each pixel requires 1 bit, but each uint8 in the draw
   * buffer can hold 8 bits. To find the uint8 value in our draw buffer that
   * stores this pixel's value we must compensate for this when using pixel
   * coordinates in byte math.
   *
   * Therefore, each uint8 in the draw buffer stores the state of 8 pixels.
   * Below is an example of calculating for [x, y] pixel coordinates [20, 10].
   *
   * For the vertical case, each row (y_) of the image is represented by
   * `hor_res_` bytes (128) - one for each column (x_). Because the pixels are
   * stored vertically, the byte-offset of the first pixel in the 10th row is
   * `128 * (10 >> 3)` or * `128 * (10 / 8)` = 128.
   *
   * From this location we can simply calculate the 20th pixel column (x_) as
   * `128 + 20` to get a final offset of 148, because the pixels are stored in a
   * columnar format.
   *
   * @param x X pixel coordinate to find byte offset.
   * @param y Y pixel coordinate to find byte offset.
   * @return byte offset for a single-byte monochrome pixel at [x,y].
   */
  [[maybe_unused]] [[nodiscard]] static ptrdiff_t
  vertical_byte_offset(const int32_t &x, const int32_t &y, const int32_t& hor_res)
  {
    // Convert pixel (bit) coordinates to byte coordinates in the draw buffer.
    return hor_res * (y >> 3) + x;
  }
  /**
   * Finds the Most Significant Bit location of bit `i` in a byte.
   *
   *          MSB           LSB
   * bits      7 6 5 4 3 2 1 0
   * data      8 7 6 5 4 3 2 1
   *          Left         Right
   *
   * @return bitmask for MSB location of `i`.
   */
  [[maybe_unused]] [[nodiscard]] static uint8_t
  msb_mask(const int32_t &i) { return 1 << (7 - i % 8); }
  /**
   * Finds the Least Significant Bit location of bit `i` in a byte.
   *
   *          LSB           MSB
   * bits      0 1 2 3 4 5 6 7
   * data      1 2 3 4 5 6 7 8
   *          Left         Right
   *
   * @return bitmask for LSB location of `i`.
   */
  [[maybe_unused]] [[nodiscard]] static uint8_t
  lsb_mask(const int32_t &i) { return 1 << (i % 8); }
 };
 /**
 * Encapsulates vendor specific ESP LCD panel initialization logic.
 * This pure virtual interface can be inherited from for using new LCD devices.
 * See SSD1306 as an example to implement IPanelDevice for NT35510 or ST7789.
 *
 * At this time only I2C is supported.
 * Classes that inherit from this interface should likely be marked final.
 */
 class IPanelDevice {
 public:
  /**
   * Construct an IPanelDevice.
   *
   * @param i2c I2C object. Eventually this will mature to IProtocol or similar.
   * @param config I2C configuration for this device.
   * @param height Height of the device screen in pixels.
   * @param width Width of the device screen in pixels.
   */
  explicit IPanelDevice(I2C &i2c,
                        esp_lcd_panel_io_i2c_config_t config,
                        int width,
                        int height) :
      IPanelDevice(i2c, config, width, height,
                   width * height / 8 + LVGL_PALETTE_SIZE) { }
  /**
   * Construct an IPanelDevice.
   *
   * @param i2c I2C object. Eventually this will mature to IProtocol or similar.
   * @param config I2C configuration for this device.
   * @param height Height of the device screen in pixels.
   * @param width Width of the device screen in pixels.
   * @param draw_buf_size Size of the draw buffer for this device.
   */
  explicit IPanelDevice(I2C &i2c,
                        esp_lcd_panel_io_i2c_config_t io_config,
                        int width,
                        int height,
                        size_t draw_buf_size) :
      width_(width),
      height_(height),
      rst_num_(i2c.rst_num_),
      lv_buf_size_(draw_buf_size),
      esp_io_config_(io_config) { }
  virtual ~IPanelDevice() = default;
  //
  // PUBLIC METHODS
  /**
   * Create an LVGL display using the width and height of this device.
   *
   * @return Handle to the created LVGL display.
   */
  [[nodiscard]] lv_display_t *create_display() const
  {
    auto display = lv_display_create(width_, height_);
    assert(display);
    return display;
  }
  /**
   * Create an ESP LCD panel IO handle.
   *
   * @return The created ESP LCD panel IO handle.
   */
  [[nodiscard]] esp_lcd_panel_io_handle_t create_io_handle()
  {
    ESP_LOGI(TAG, "Creating panel IO handle");
    esp_lcd_panel_io_handle_t handle = nullptr;
    ESP_ERROR_CHECK(
        esp_lcd_new_panel_io_i2c(I2C::get(), &esp_io_config_, &handle));
    return handle;
  }
  /**
   * Create and initialize an ESP panel handle.
   * IPanelDevice implementors must initialize the panel within init_panel.
   *
   * @param config ESP LCD panel configuration.
   * @param io ESP LCD panel IO handle.
   * @param [out] panel ESP LCD panel handle output pointer location.
   */
  void create_panel(esp_lcd_panel_dev_config_t &config,
                    esp_lcd_panel_io_handle_t io,
                    esp_lcd_panel_handle_t &panel)
  {
    // If the passed handle is already allocated, delete it.
    if (panel != nullptr) {
      ESP_LOGI(TAG, "Removing unused panel");
      esp_lcd_panel_del(panel);
    }
    ESP_LOGI(TAG, "Installing vendor panel driver");
    // Call pure virtual method responsible for initializing the panel handle.
    init_panel(config, io, panel);
  }
  /**
   * Retrieve the device specific vendor configuration structure.
   *
   * @return Address of vendor configuration structure.
   * @sa SSD1306::vendor_config
   */
  virtual void *vendor_config() = 0;
  //
  // PUBLIC MEMBERS
  /// Width of the device screen in pixels.
  int32_t width_;
  /// Height of the device screen in pixels.
  int32_t height_;
  /// RST GPIO pin number.
  int rst_num_;
  /// LVGL draw buffer size for the device.
  size_t lv_buf_size_;
  /// ESP LCD panel IO configuration.
  esp_lcd_panel_io_i2c_config_t esp_io_config_;
  /**
   * Registers LVGL draw buffers and callbacks for this display.
   *
   * An implementation of the interface can optionally override this method to
   * provide custom LVGL callbacks and display configurations.
   *
   * @param display_handle LVGL display handle to use for rendering.
   * @param io_handle IO handle for the ESP LCD panel.
   */
  virtual void register_rendering_data(lv_display_t *display_handle,
                                       esp_lcd_panel_io_handle_t io_handle);
  /**
   * Registers LVGL ticker timer callback for rendering this display.
   *
   * An implementation of the interface can optionally override this method to
   * provide custom LVGL callbacks and tick configurations.
   */
  virtual void register_lvgl_tick_timer();
 protected:
  /**
   * Static accessor to a static buffer to store draw buffer data for the panel.
   *
   * This method is protected to allow an implementation to provide a custom
   * callback method similar to IPanelDevice::lvgl_flush_cb.
   *
   * The buffer is allocated statically within the scope of this function to
   * allow creating multiple panels that _each_ manage their own statically
   * allocated draw buffer data. This simplifies implementing the interface by
   * taking this responsibility off of the implementor. The buffer will only be
   * allocated if this method is called, so the memory is only used if required.
   *
   * @return Pointer to uint8 draw buffer data.
   * @sa register_rendering_data for overriding LVGL rendering callbacks.
   */
  static uint8_t *get_additional_draw_buffer()
  {
    // Static to the scope of this function, not the compilation unit.
    // For LV_COLOR_FORMAT_I1 we need an extra buffer to hold converted data.
    static uint8_t oled_buffer[LCD_H_RES * LCD_V_RES / 8];
    return oled_buffer;
  }
 private:
  //
  // PRIVATE METHODS
  /**
    * Initializes the ESP panel using vendor specific APIs and configurations.
    * This method should implement any setup logic specific to the device.
    *
    * @param config ESP LCD panel configuration.
    * @param io ESP LCD panel IO handle.
    * @param [out] panel ESP LCD panel handle output pointer location.
    */
  virtual void init_panel(esp_lcd_panel_dev_config_t &config,
                          esp_lcd_panel_io_handle_t io,
                          esp_lcd_panel_handle_t &panel) = 0;
  //
  // PRIVATE STATIC METHODS
 /**
 * The callback invoked when panel IO finishes transferring color data.
 * This signals that the panel is ready to flush image data to the display.
 *
 * @param panel LCD panel IO handles.
 * @param data Panel IO event data, fed by driver.
 * @param user_ctx User data, passed from `esp_lcd_panel_io_xxx_config_t`.
 * @return Whether a high priority task has been waken up by this function.
 * @sa SSD1306::SSD1306 for setting user_ctx data passed to the callback.
 * @sa register_rendering_data for overriding this callback.
 */
  static bool lvgl_flush_ready_cb(esp_lcd_panel_io_handle_t panel,
                                  esp_lcd_panel_io_event_data_t *data,
                                  void *user_ctx);
  /**
   * The callback invoked for flushing the rendered image to the display.
   *
   * `px_map` contains the rendered image as raw pixel map and it should be
   *  copied to `area` on the display.
   *
   * The following details are crucial for understanding the logic surrounding
   * flushing to the display in this example.
   *
   * The order of bits within the px_map from _LVGL_ is MSB first.
   *              MSB           LSB
   *     bits      7 6 5 4 3 2 1 0
   *     pixels    0 1 2 3 4 5 6 7
   *              Left         Right
   *
   * The bytes from _LVGL_ are mapped to pixel rows of the display
   * 8 bits (pixels) per byte -
   * [0, 0, 0, 0, 0, 0, 0, 0]
   * [0, 0, 0, 0, 0, 0, 0, 0]
   * [0, 0, 0, 0, 0, 0, 0, 0]
   *
   * The order of bits expected by the _display driver_ is LSB first.
   * We must preserve pairing of each bit and pixel when writing to the display.
   *              LSB           MSB
   *     bits      0 1 2 3 4 5 6 7
   *     pixels    7 6 5 4 3 2 1 0
   *              Left         Right
   *
   * Bytes expected by the _display driver_ map to pixel columns of the display.
   * 8 bits (pixels) per byte -
   * [0, [0, [0, [0,
   *  0,  0,  0,  0,
   *  0,  0,  0,  0,
   *  0,  0,  0,  0,
   *  0,  0,  0,  0,
   *  0,  0,  0,  0,
   *  0,  0,  0,  0,
   *  0]  0]  0]  0]
   *
   *  These layouts in memory have no opinion on the shape of the image. The
   *  beginning and end of a row or a column for example is entirely dependent
   *  on how the data is accessed. The vertical and horitzontal resolution may
   *  vary between displays.
   *
   * For the LV_COLOR_FORMAT_I1 color format we are using, an additional buffer
   * is needed for transposing the bits to the vertical arrangement required by
   * the display driver that is outlined above.
   *
   * This callback implementation is an example of handling this transposition
   * and flushing the data to the display in the expected format.
   *
   * @param display LVGL display handle to use for rendering.
   * @param area Area of the display being flushed.
   * @param px_map Rendered image data for writing to the display area.
   * @sa register_rendering_data for overriding this callback.
   * @sa get_additional_draw_buffer
   */
  static void lvgl_flush_cb(lv_display_t *display,
                            const lv_area_t *area,
                            uint8_t *px_map);
  /**
   * Callback invoked for every period of the timer.
   *
   * This callback _must_ call lv_tick_inc to inform LVGL how much time has
   * elapsed since the last period of the timer.
   *
   * @param data User data passed to the callback.
   * @sa register_lvgl_tick_timer for setting user data and the tick period of
   *        the timer, or overriding this callback entirely.
   */
  static void lvgl_increase_tick_cb(void *data);
  /**
   * FreeRTOS task callback invoked for handling LVGL events or updating the UI.
   *
   * This function is intentionally an endless loop and should never return.
   * LVGL initialization logic can optionally be added before entering the loop.
   * Input logic can optionally be handled within the loop.
   *
   * This callback _must_ call lv_timer_handler to handle LVGL periodic timers.
   *
   * @param data User data passed to the callback.
   * @sa register_lvgl_tick_timer for overriding this callback.
   */
  [[noreturn]] static void lvgl_port_task(void *data);
  //
  // PRIVATE MEMBERS
  /// LVGL draw buffer associated with this Display's lv_display_t.
  void *lv_buf_;
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "IPanelDevice";
 };
 #endif // PANEL_DEVICE_H
--- a/esp/cpp/07_lcd-panel-i2c/main/scoped_lock.cpp
+++ b/esp/cpp/07_lcd-panel-i2c/main/scoped_lock.cpp
@@ -0,0 +1,12 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #include "scoped_lock.h"
 // LVGL library is not thread-safe, this example calls LVGL APIs from tasks.
 // We must use a mutex to protect it.
 _lock_t ScopedLock::lv_lock_;
--- a/esp/cpp/07_lcd-panel-i2c/main/scoped_lock.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/scoped_lock.h
@@ -0,0 +1,28 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef SCOPED_LOCK_H
 #define SCOPED_LOCK_H
 #include <mutex>
 /**
 * Obtains LVGL API mutex lock for the duration of local scope.
 *
 * LVGL library is not thread-safe, this lock should be held when making calls
 * to the LVGL API, and released as soon as possible when finished.
 */
 struct ScopedLock {
  explicit ScopedLock() { _lock_acquire(&lv_lock_); }
  ~ScopedLock() { _lock_release(&lv_lock_); }
  /// Mutex used to protect LVGL API calls.
  static _lock_t lv_lock_;
 };
 #endif // SCOPED_LOCK_H
--- a/esp/cpp/07_lcd-panel-i2c/main/ssd1306.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/ssd1306.h
@@ -0,0 +1,106 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef SSD1306_H
 #define SSD1306_H
 #include <esp_lcd_panel_ssd1306.h>
 #include "panel_device.h"
 // According to specific display hardware.
 // https://www.digikey.com/en/products/detail/winstar-display/WEA012864DWPP3N00003/20533255
 #define SCREEN_WIDTH           128  // OLED display width, in pixels.
 #define SCREEN_HEIGHT          64  // OLED display height, in pixels.
 // According to SSD1306 datasheet.
 // https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
 #define I2C_HW_ADDR            0x3C
 #define LCD_PIXEL_CLOCK_HZ     (400 * 1000)
 // Bit number used to represent command and parameter
 #define LCD_CMD_BITS           8
 #define LCD_PARAM_BITS         8
 /**
 * Example of implementing the IPanelDevice interface for SSD1306 LCD device.
 */
 class SSD1306 final : public IPanelDevice {
 public:
  /**
   * Construct a new SSD1306 device.
   *
   * @param i2c I2C master bus to manage this device.
   */
  explicit SSD1306(I2C &i2c) :
      SSD1306(i2c, {.height = SCREEN_HEIGHT}) { }
  /**
   * Construct a new SSD1306 device given a specific SSD1306 configuration.
   *
   * @param i2c I2C master bus to manage this device.
   * @param config SSD1306 vendor configuration.
   * @param width Width of the device screen in pixels.
   * @param height Height of the device screen in pixels.
   */
  SSD1306(I2C &i2c,
          esp_lcd_panel_ssd1306_config_t config,
          int width = SCREEN_WIDTH,
          int height = SCREEN_HEIGHT
  ) :
      IPanelDevice(i2c,
                   (esp_lcd_panel_io_i2c_config_t) {
                       .dev_addr = I2C_HW_ADDR,
                       // User data to pass to the LVGL flush_ready callback.
                       // See IPanelDevice::lvgl_flush_ready_cb
                       .user_ctx = nullptr,
                       .control_phase_bytes = 1,
                       .dc_bit_offset = 6,
                       .lcd_cmd_bits = LCD_CMD_BITS,
                       .lcd_param_bits = LCD_PARAM_BITS,
                       .scl_speed_hz = LCD_PIXEL_CLOCK_HZ,
                   },
                   width,
                   height
      ),
      ssd1306_config_(config) { }
  ~SSD1306() final = default;
  //
  // PUBLIC METHODS
  /**
   * Provides the SSD1306 vendor configuration to IPanelDevice consumers.
   *
   * @return Address of the SSD1306 vendor configuration structure.
   */
  void *vendor_config() override
  {
    return &ssd1306_config_;
  }
  //
  // PUBLIC MEMBERS
  /// SSD1306 configuration structure.
  esp_lcd_panel_ssd1306_config_t ssd1306_config_;
 private:
  //
  // PRIVATE METHODS
  /// Initializes the ESP LCD panel handle for the SSD1306 device.
  void init_panel(esp_lcd_panel_dev_config_t &config,
                  esp_lcd_panel_io_handle_t io,
                  esp_lcd_panel_handle_t &panel) override
  {
    ESP_ERROR_CHECK(esp_lcd_new_panel_ssd1306(io, &config, &panel));
  }
 };
 #endif // SSD1306_H
--- a/esp/cpp/07_lcd-panel-i2c/main/time_keeper.h
+++ b/esp/cpp/07_lcd-panel-i2c/main/time_keeper.h
@@ -0,0 +1,161 @@
 /*#############################################################################
 ## Author: Shaun Reed                                                        ##
 ## Legal: All Content (c) 2025 Shaun Reed, all rights reserved               ##
 ##                                                                           ##
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com                     ##
 ##############################################################################
 */
 #ifndef TIME_KEEPER_H
 #define TIME_KEEPER_H
 #include <esp_log.h>
 #include <esp_timer.h>
 #include "i2c.h"
 /**
 * Stores arguments and ESP timer handle for a Timer.
 * In general Timers should be used via the TimeKeeper interface only.
 *
 * Timers cannot be copied, and are only created by a TimeKeeper instance.
 * The TimeKeeper can delete existing Timers, calling it's destructor.
 * The ESP timer will be deleted when this class desctructor is called.
 */
 struct Timer {
  explicit Timer(esp_timer_create_args_t args) :
      args_(args), esp_timer_(nullptr)
  {
    ESP_LOGI(TAG, "Creating esp_timer with name: '%s'", args_.name);
    ESP_ERROR_CHECK(esp_timer_create(&args, &esp_timer_));
  }
  ~Timer()
  {
    ESP_LOGI(TAG, "Destroying esp_timer with name: '%s'", args_.name);
    ESP_ERROR_CHECK(esp_timer_delete(esp_timer_));
  }
  Timer(const Timer &) = delete;
  Timer(Timer &) = delete;
  Timer &operator=(Timer &) = delete;
  //
  // PUBLIC MEMBERS
  /// Arguments passed to ESP API during timer creation.
  esp_timer_create_args_t args_;
  /// ESP timer handle.
  esp_timer_handle_t esp_timer_;
 private:
  //
  // PRIVATE MEMBERS
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "Timer";
 };
 /**
 * ESP timer mananger class.
 *
 * Timers should only be accessed using the get_handle method.
 * If the Timer destructor is called the underlying ESP timer will be deleted.
 */
 struct TimeKeeper {
  /// Timer handle type used for referring to Timers.
  using TimerHandle = Timer *;
  //
  // GETTERS
  TimerHandle get_handle(const char *name)
  {
    return &managed_timers_.at(name);
  }
  TimerHandle operator[](const char *name) { return get_handle(name); }
  //
  // PUBLIC METHODS
  /**
   * Create a new managed Timer with the provided ESP arguments.
   * The timer can be retrieved later using the args.name field value.
   *
   * @param args ESP timer creation arguments.
   * @return TimerHandle Handle to a Timer managed by this TimeKeeper.
   * @sa get_handle
   * @sa operator[](const char*)
   */
  [[maybe_unused]] TimerHandle create_timer(esp_timer_create_args_t args)
  {
    auto rt = managed_timers_.emplace(args.name, args);
    if (!rt.second) {
      ESP_LOGE(TAG, "Timer already exists with name '%s'", args.name);
      return nullptr;
    }
    return &rt.first->second;
  }
  /// Stop a Timer with the given name.
  [[maybe_unused]] void stop_timer(const char *name)
  {
    ESP_ERROR_CHECK(esp_timer_stop(get_handle(name)->esp_timer_));
  }
  /// Delete a Timer with the given name.
  [[maybe_unused]] void delete_timer(const char *name)
  {
    if (managed_timers_.erase(name) == 0) {
      ESP_LOGE(TAG, "Attempt to delete timer that does not exist: '%s'", name);
    }
  }
  /// Create a Timer with the ESP args and call esp_timer_start_periodic.
  [[maybe_unused]] void
  start_new_timer_periodic(esp_timer_create_args_t args,
                           uint64_t period)
  {
    start_timer_periodic(create_timer(args)->args_.name, period);
  }
  /// Calls esp_timer_start_periodic on the Timer with the given name.
  [[maybe_unused]] void start_timer_periodic(const char *name,
                                             uint64_t period)
  {
    ESP_ERROR_CHECK(
        esp_timer_start_periodic(get_handle(name)->esp_timer_, period));
  }
  /// Create a Timer with the ESP args and call esp_timer_start_once.
  [[maybe_unused]] void start_new_timer_once(esp_timer_create_args_t args,
                                             uint64_t timeout_us)
  {
    start_timer_once(create_timer(args)->args_.name, timeout_us);
  }
  /// Calls esp_timer_start_once on the Timer with the given name.
  [[maybe_unused]] void start_timer_once(const char *name,
                                         uint64_t timeout_us)
  {
    ESP_ERROR_CHECK(
        esp_timer_start_once(get_handle(name)->esp_timer_, timeout_us));
  }
 private:
  //
  // PRIVATE MEMBERS
  /// Existing ESP timers created for this TimeKeeper instance.
  std::unordered_map<const char *, Timer> managed_timers_;
  /// Tag used for ESP logging.
  constexpr static const char *TAG = "TimeKeeper";
 };
 #endif // TIME_KEEPER_H
--- a/esp/cpp/07_lcd-panel-i2c/schematic.png
+++ b/esp/cpp/07_lcd-panel-i2c/schematic.png
--- a/esp/cpp/07_lcd-panel-i2c/sdkconfig
+++ b/esp/cpp/07_lcd-panel-i2c/sdkconfig
--- a/esp/cpp/ESP32-basic-starter-kit.pdf
+++ b/esp/cpp/ESP32-basic-starter-kit.pdf
--- a/esp/cpp/ESP32-dev-module.png
+++ b/esp/cpp/ESP32-dev-module.png
--- a/esp/cpp/README.md
+++ b/esp/cpp/README.md
@@ -0,0 +1,22 @@
 # esp
 ```bash
 shaunrd0/klips/esp/
 ├── 01_led-button               # Simple LED circuit controlled by an on board button.
 ├── 02_led-button-web           # LED controlled by a button or within a web browser.
 ├── 03_temp-humidity-web        # Temperature and humidity sensor within a web browser.
 ├── 04_esp-idf-arduino          # CMake example instead of Arduino IDE for ESP development.
 ├── 05_temp-humidity-web        # Temperature and humidity sensor within a web browser.
 ├── 06_i2c-scanner              # Simple I2C device scanner.
 ├── 07_lcd-panel-i2c            # Drawing to a LCD display with LVGL over I2C.
 ├── ESP32-basic-starter-kit.pdf # PDF for tutorials in ESP32 starter kit.
 ├── ESP32-dev-module.png
 └── README.md
 ```
 Examples 1-3 are built using the Arduino IDE.
 All examples after `04_esp-idf-arduino` are built with cmake and the [ESP-IDF](https://github.com/espressif/esp-idf).
 [Arduino ESP32 GitHub](https://github.com/espressif/arduino-esp32) \
 [Arduino ESP32 API reference](https://docs.espressif.com/projects/arduino-esp32/en/latest/libraries.html)
--- a/javascript/README.md
+++ b/javascript/README.md
@@ -1,9 +1,9 @@
-# Javascript
+# javascript
 This directory contains Javascript projects and examples that I've made.
-```
+```bash
-github.com/shaunrd0/klips/javascript
+shaunrd0/klips/javascript
 ├── webgl      # Examples of using WebGL within JS
 └── README.md
 ```
--- a/python/README.md
+++ b/python/README.md
@@ -1,12 +1,13 @@
 # python
 This directory contains a collection of Python scripts or CLI tools that I've made.
-Each of these projects provide a `requirements.txt` that can be used to 
+Each of these projects provide a `requirements.txt` that can be used to
 install the required Python packages and dependencies.
 To install Python 3.9 and `pip`
 ```bash
-sudo apt install python3.9 python3-pip 
+sudo apt install python3.9 python3-pip
 python3.9 -m pip install -U pip
 ```
Author	SHA1	Message	Date
Shaun Reed	a3d6a85516	Includes.	2025-03-01 17:08:44 -05:00
Shaun Reed	a91352ffcd	Make Pixel static.	2025-03-01 16:49:15 -05:00
Shaun Reed	fc0fd98426	Clean up comments.	2025-03-01 16:15:21 -05:00
Shaun Reed	1a7da67bdb	Clean up flush callback.	2025-03-01 15:43:40 -05:00
Shaun Reed	00ea5dae20	Refactor ownership of draw buffer data.	2025-03-01 10:34:24 -05:00
Shaun Reed	63899a606a	Clean up some comments.	2025-02-26 19:26:53 -05:00
Shaun Reed	25b4564a8b	Fix ESP logging tags.	2025-02-16 14:40:53 -05:00
Shaun Reed	e2bb406139	Finish cleanup.	2025-02-16 14:32:00 -05:00
Shaun Reed	96b6a8bec9	Rename project.	2025-02-16 11:48:15 -05:00
Shaun Reed	509b57fedb	Add time_keeper.h + Refactor most classes to header only.	2025-02-16 11:24:35 -05:00
Shaun Reed	75b51f0c7c	Cleanup remaining warnings.	2025-02-16 09:41:09 -05:00
Shaun Reed	74404b1a44	Make TimeKeeper a static member of Display.	2025-02-16 09:12:24 -05:00
Shaun Reed	9140ba5fb4	Add Timer and TimeKeeper to Display.	2025-02-16 08:58:40 -05:00
Shaun Reed	c9ec16d70c	More cleanup.	2025-02-16 07:25:02 -05:00
Shaun Reed	5c61fbd378	Clean code.	2025-02-16 06:38:47 -05:00
Shaun Reed	8636de8f2f	Pass RST pin through I2C.	2025-02-15 18:16:25 -05:00
Shaun Reed	6493988324	Add panel.h, panel.cpp.	2025-02-15 17:52:33 -05:00
Shaun Reed	64d817e362	Move I2C into header file.	2025-02-15 17:44:58 -05:00
Shaun Reed	b3d830cdeb	Add IPanelDevice.	2025-02-15 17:12:45 -05:00
Shaun Reed	670a523a16	Clean code.	2025-02-15 14:13:42 -05:00
Shaun Reed	cc5bffd1e7	Store configs used in ctors.	2025-02-15 10:26:27 -05:00
Shaun Reed	03784ac097	Move classes to separate files.	2025-02-15 10:11:49 -05:00
Shaun Reed	9e912048ab	Checkpoint adding SSD1306 and PanelDevice.	2025-02-15 09:41:13 -05:00
Shaun Reed	0743fc4a5e	Factor out Panel.	2025-02-14 17:47:44 -05:00
Shaun Reed	046dfbb6e6	Add Display::set_text.	2025-02-14 17:19:13 -05:00
Shaun Reed	ef7a027cf0	Factor out I2C.	2025-02-14 16:49:38 -05:00
Shaun Reed	2dd099f26e	Improve ScopedLock.	2025-02-14 16:33:41 -05:00
Shaun Reed	8aaed133e8	Update Display getters.	2025-02-14 15:58:37 -05:00
Shaun Reed	58a83590ca	Add ScopedLock for LVGL.	2025-02-14 15:50:35 -05:00
Shaun Reed	dd5335815c	Checkpoint	2025-02-14 15:02:49 -05:00
Shaun Reed	e9d5ef46d1	Replace lcd project	2025-02-13 19:31:58 -05:00
Shaun Reed	356d8ccd9a	WIP debug I2C driver error E (413) i2c: CONFLICT! driver_ng is not allowed to be used with this old driver	2025-02-09 20:04:25 -05:00
Shaun Reed	4063921340	Add I2C scanner example.	2025-02-09 11:59:38 -05:00
Shaun Reed	043fa2fabb	WIP lcd	2025-02-09 01:18:06 -05:00
Shaun Reed	6cd7d7db29	[esp] Port temp-humidity-web example to cmake.	2025-02-08 12:50:06 -05:00
Shaun Reed	17c559a31f	[esp] Add ESP-IDF cmake example.	2025-02-08 12:47:01 -05:00
Shaun Reed	e6ba60da89	[esp] Add temperature and humidity example.	2025-02-01 23:49:53 -05:00
Shaun Reed	8bf174d256	[esp] Add ESP examples.	2025-02-01 14:33:40 -05:00
Shaun Reed	5f9f508581	[cpp] Remove ignores	2022-12-24 10:18:19 -05:00
`@@ -1,4 +1,4 @@`
	`# Ansible`	`# ansible`

	`A few simple roles / plays I've put together in learning how to use Ansible can be found under their corresponding directories.`	`A few simple roles / plays I've put together in learning how to use Ansible can be found under their corresponding directories.`