Senseair s8 CO2 + wemos + oled shield enclosure
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A simple enclosure for a Senseair S8-4B co2 concentration sensor and a Wemos S2 board with the OLED shield.
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- Printables
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- Electronics
- Licencja
- BSD License
A simple enclosure for a Senseair S8-4B co2 concentration sensor and a wemos S2 board with the OLED shield. Also includes space for gluing in a 8mm WS2812b LED for indicating the CO2 levels with a nice color, a translucent filament is required for this.
Parts:
- Wemos S2 mini - https://www.aliexpress.com/item/1005004563128378.html
- Senseair S8-4B - https://www.aliexpress.com/i/32906666594.html
- Wemos OLED shield - https://www.aliexpress.com/item/1005001621659840.html
- [Optional] 8mm tht adressable led: https://www.tme.eu/en/details/ws2812d-f8/tht-leds-round/worldsemi/ sorry, these seem out of production, but I still had them in my drawer :(
- Some wires
Wiring:
| Wemos Pin | Role |
|---|---|
| 33 | OLED SDA (connected by the shield) |
| 35 | OLED SCL (connected by the shield) |
| 18 | TX of sensor (marked TX on the sensor) |
| 16 | RX of sensor (marked RX on the sensor) |
| 36 | WS2812B LED |
| 3V3 | OLED positive power supply |
| VBUS | Sensor G+, LED positive power supply |
| GND | Sensor G0, LED, OLED negative power supply |
Firmware (esphome configuration):
https://github.com/alufers/co2-sensor-esphome
Publishes the results to Home Assistant via MQTT and displays on a OLED display. The OLED display shows the current ppm CO2 value, and a small graph to show the trend over the last 15 minutes.