bertdebondt What does RTS mean ? As long as its 433Mhz, you can capture the RF codes if you flash the Sonoff bridge with Tasmota and flash rhe RF chip with Portisch firmware. It has a RfRaw sniffibg mode which captures raw RF data which can be converted to resend by the Bridge.

bertdebondt It is really NDIR based ? Can't image that for that kind of money. A real NDIR CO2 sensor (MH-Z19C or a SenseAir S8) is already 20 euro.I think this module contains a cheap inacurate non-NDIR digital sensor chip (1 cheap chip for CO2, VOC) which has an electronic calculated CO2 value.If anyone can post the internals of this module (sensor type, chip ? ESP ?) or share the manual. thx According to some comments in the reviews the air quality sensor is a inaccurate TPM-300A v2.2 air quality sensor which has only 4 levels... It internally generates an number between 0 and 3. All the analog numbers are just emulated to get fancy display...

bertdebondt not clear to me. Also interested if I can't link this device to for ex. home assistant and push values over Wifi. If it is ESP based chip maybe you can flash it with ESPhome.

bertdebondt Does this contain Wifi Access ? It does not look so at first sight. If it contains an ESP chip : ESP8266 it can, but it's not clear in the description.

bertdebondt enoughI think. It was outside my garden in full sun the whole summer running a water irrigation pump control and sometimes running a oil fry cooking jar for a short time (2000W at 15 minutes). Inside was the Sonoff basic R3 module.

bertdebondt no,don't think so, you can link it to ZHA Home Assistant integration with a Zigbee dongle or like I use a flashed tasmota Sonoff zigbee bridge.

bertdebondt No. It is a simple temp and hum sensor which sends it values over Zigbee to a Zigbee master.