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ESP32-C3 Rust Tutorials

Various embedded Rust tutorials using the ESP32-C3. We'll work towards making a remote data logger by first implementing peripherals we will need to build the larger project.

Each tutorial below has a YouTube video link where I will start with a blank project and implement a peripherals using the latest esp-idf-hal version.

Repo organization

Tutorials: Source code for the YouTube tutorials
WIP: Half-baked crates that may have some useful code in the future
docs: Various datasheets, books, and technical manuals
submodules: All of the submodules for this repository.
- <b>referecnce projects</b>: A huge collection of embedded Rust projects that I copy code from
Data-Logger-PCB: KiCAD hardware designs for ESP32-C3 data logger PCB

Part 0: Remote Data Logger MVP

Minimum viable product project where we'll implement all the peripherals and features we need for the data logger

4 ADC's
16 Digital I/O
DHT11
SD card logging
UART CLI Shell

Peripheral Tutorials

p0-output: Make the "Hellow World" of embedded systems: a Blinky application to periodically turn an LED on and off
p1-input: Add a button to turn the blinking logic on and off
p2-threads: Move the button logic and LED logic to their own thread and pass messages between threads with crossbeams channel
p3-adc: Read an analog-to-digital converter channel and print out the value
p4-dht11: Read a DHT11 for temperature and humidity data
p5-i2c: Configure and use a SX1509 GPIO Expander through I2C
p6-spi: Write a string to a uSD card over SPI using embedded-sdmmc crate
p7-uart: Receiver characters from the UART and send them back when we detect a carriage return

Application Tutorials

p8-cli-shell: Create a simple CLI shell to interact with the ESP32-C3 over UART
p9-adc-stream: Configure ADC's to continuously read and make that data available to other parts of the application through a mutex
p10-log-values: Log all the values read from the ADC's
p11-digital-stream: Continuously read the SX1509 inputs and log to SD card

Part 1:

For the next part of the project we will add in features listed below:

Debugging
Logging
FSM/HSM
Wifi
MQTT
OTA
Pub/sub
Crash dumps & diagnostics

Other features I'd like to add but don't have a clear example for yet:

DMA
Timer usage

<details> <summary>Development environment setup</summary>

Install Rust and associated build tools
Start a project using the esp-idf-template from the private repo home dir. I chose all the default options

# STD Project
cargo generate https://github.com/esp-rs/esp-idf-template cargo
# NO-STD (Bare-metal) Project
cargo generate https://github.com/esp-rs/esp-template

Build the Hello World program by running cargo build in the new project dir. This will take a while to build the first time:

cd esp32-rust
cargo build
...
Finished dev [optimized + debuginfo] target(s) in 6m 40s

Flash the ESP32 with the build artifact:

espflash /dev/ttyACM0 target/riscv32imc-esp-espidf/debug/project

Connect to ESP32 and monitor

espmonitor /dev/ttyACM0

</details> <details> <summary>Misc</summary>

Singletons in Embedded Rust

Pull in code for submodules with:

git submodule update --init --recursive

</details> <details> <summary>Links</summary>