README.md

atom-s3-co2

CO2 monitor integration for M5Stack AtomS3. Reads sensor values from UD-CO2S, and sends values to ThingsSpeak IoT platform. Temperature, Humidity (relative and absolute), CO2 concentration are shown in the display. Click on the display button to switch between each readings.

Materials

• M5Stack AtomS3
• UD-CO2S
• USB AC adapter (Type A)
• USB Type A male to male cable
• USB Type A splitter
  • One female end connects to power
  • One female end connects to UD-CO2S
  • Male end connects to Atom S3, using Type C to A adapter
• USB Type C (male) to A (female) adapter
  • Used to connect AtomS3 to USB splitter
• USB Type C Extender Adapter

graph LR
    AC["USB AC Adapter"] -->|Type A Male-to-Male Cable| Splitter["USB Type A Splitter"]
    Splitter -->Adapter["USB Type C to A Adapter"]
    Adapter --> Extension["Type C Extender"]
    Extension --> |USB Type C Cable| AtomS3
    Splitter --> UDCO2S["UD-CO2S"]

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Setup

• Prepare environment: VSCode + platform.io
• Setup src/config.h
  • ThingSpeak API keys, channel ID, data sending interval
  • Wi-Fi SSID and password
• Build and write the program to AtomS3 using USB
• Connect UD-CO2S to AtomS3
• Provide power 5V supply
• When AtomS3 is booted up, it will automatically connect to Wi-Fi and start reading values from the sensor.

License

MIT license excluding files under lib/EspUsbHost/. See here for details.

References

• This project was developed based on codes/libraries from wakwak-koba/EspUsbHost.