{"id":25521899,"url":"https://github.com/mu373/atom-s3-co2","last_synced_at":"2026-05-03T15:34:01.584Z","repository":{"id":277610057,"uuid":"653602312","full_name":"mu373/atom-s3-co2","owner":"mu373","description":"CO2 monitor integration for M5Stack AtomS3. 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Reads sensor values from [UD-CO2S](https://www.iodata.jp/product/tsushin/iot/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.\n\n## Materials\n- M5Stack AtomS3\n- [UD-CO2S](https://www.iodata.jp/product/tsushin/iot/ud-co2s/)\n- USB AC adapter (Type A)\n- [USB Type A male to male cable](https://www.amazon.com/dp/B00HSS9KJY)\n- [USB Type A splitter](https://www.amazon.com/dp/B085BJRZN2)\n    - One female end connects to power\n    - One female end connects to UD-CO2S\n    - Male end connects to Atom S3, using Type C to A adapter\n- [USB Type C (male) to A (female) adapter](https://www.amazon.com/dp/B0C9VD4YTK)\n    - Used to connect AtomS3 to USB splitter\n- [USB Type C Extender Adapter](https://www.amazon.com/dp/B0D9XHNDX6)\n\n```mermaid\ngraph LR\n    AC[\"USB AC Adapter\"] --\u003e|Type A Male-to-Male Cable| Splitter[\"USB Type A Splitter\"]\n    Splitter --\u003eAdapter[\"USB Type C to A Adapter\"]\n    Adapter --\u003e Extension[\"Type C Extender\"]\n    Extension --\u003e |USB Type C Cable| AtomS3\n    Splitter --\u003e UDCO2S[\"UD-CO2S\"]\n```\n\n## Setup\n- Prepare environment: VSCode + platform.io\n- Setup `src/config.h`\n    - ThingSpeak API keys, channel ID, data sending interval\n    - Wi-Fi SSID and password\n- Build and write the program to AtomS3 using USB\n- Connect UD-CO2S to AtomS3\n- Provide power 5V supply\n- When AtomS3 is booted up, it will automatically connect to Wi-Fi and start reading values from the sensor.\n\n## License\nMIT license excluding files under `lib/EspUsbHost/`. See [here](https://github.com/mu373/tail-estimation/blob/master/LICENSE.md) for details.\n\n## References\n- This project was developed based on codes/libraries from [wakwak-koba/EspUsbHost](https://github.com/wakwak-koba/EspUsbHost).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmu373%2Fatom-s3-co2","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmu373%2Fatom-s3-co2","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmu373%2Fatom-s3-co2/lists"}