[esp] Add Rust example with std.

esp/rust/01_esp-idf-std/README.md

@@ -0,0 +1,32 @@
+# esp-idf-std
+
+This is an example of using ESP-IDF with std enabled in Rust
+When flashed to a device, the application just adjusts the intensity of the on-board LED for visual verification that flashing works correctly.
+
+Steps used to generate this project
+
+```bash
+cargo install cargo-generate
+cargo generate --git https://github.com/esp-rs/esp-idf-template.git --name esp-idf-rust-std -d mcu=esp32 -d std=true
+```
+
+Steps to build and flash this project
+
+```bash
+# Install espflash if you don't have it already
+cargo install espflash
+
+# Export esp-idf build environment
+. ~/export-esp.sh
+
+# Build and flash to the device
+cargo build
+cargo run
+
+# Check the serial monitor (optional)
+sudo usermod -aG dialout $USER
+newgrp dialout
+espflash monitor
+```
+
+For more detailed information on setting up a development environment, see [the esp/rust README](/esp/rust/README.md)