Monitor air quality, starting with C02. This project currently uses the ESP32-C3 MCU and is implemented in Rust (no_std). It periodically reads the sensor data (CO2, temperature, humidity) and displays it on an e-ink display. See Display Themes for more info on the display themes.
To build:
cd esp32c3_nostd
cargo build --releaseTo flash:
cd esp32c3_nostd
cargo run --releaseI2C and SPI2 can be used on any GPIO pins.
Connections:
- I2C SCL (yellow) -> GPIO0
- I2C SDA (green) -> GPIO1
- GND (black) -> GND
- VDD (red) -> 3.3 V
https://www.waveshare.com/product/displays/e-paper/epaper-2/2.9inch-e-paper-module-b.htm
- VCC: 3.3V/5V
- GND: Ground
- DIN: SPI MOSI pin
- CLK: SPI SCK pin
- CS: SPI chip selection, low active
- DC: Data / Command selection (high for data, low for command)
- RST: External reset, low active
- BUSY: Busy status output, low active
Connections:
- VCC -> 3.3 V
- GND -> GND
- DIN (MOSI) -> GPIO4
- CLK (SCK) -> GPIO5
- CS -> GPIO6
- DC (MISO) -> GPIO7
- RST -> GPIO18
- BUSY -> GPIO19
- https://github.com/Sensirion/arduino-ble-gadget/blob/master/documents/SCD4x_BLE_Gadget_Tutorial.md
- https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf
- https://docs.rust-embedded.org/discovery/microbit/08-i2c/index.html
- https://docs.rs/esp32c3-hal/latest/esp32c3_hal/i2c/index.html
- https://www.allaboutcircuits.com/technical-articles/spi-serial-peripheral-interface
- https://github.com/waveshareteam/Pico_ePaper_Code
- https://projects.raspberrypi.org/en/projects/button-switch-scratch-pi/1
- https://microcontrollerslab.com/push-button-esp32-gpio-digital-input/
- hauju for releasing https://github.com/hauju/scd4x-rs
- caemor for https://github.com/caemor/epd-waveshare
- Everyone else involved in open source embedded Rust