I’m on the hunt for a plug-and-play CO2 sensor that seamlessly integrates with Openhab, especially in high humidity environments. I’ve been experimenting with the MH-Z19 sensor paired with an Arduino and ESP8266 setup, aiming to link it to Openhab for controlling a relay and fan, possibly via MQTT. While I’ve got the fan control figured out, I’m curious if there’s a simpler solution or alternative sensors that might work better. I’ve also considered a direct Raspberry Pi connection but would love to avoid additional hardware complexity. If anyone has successfully implemented a similar setup or has recommendations for sensors that work well with Openhab, I’d be thrilled to hear about your experiences! 