the third one I have bought. Delivery in less than one week.

the third one I have bought. Delivery in less than one week.

the third one I have bought. Delivery in less than one week.

the second one I have bought, convenient offer, fast delivery, good packing

the second one I have bought, convenient offer, fast delivery, good packing

the second one I have bought, convenient offer, fast delivery, good packing

Très bien

Très bien

Très bien

Seems to work well enough for trend measurement, easy to use with ESP32 and esphome.

Seems to work well enough for trend measurement, easy to use with ESP32 and esphome.

Seems to work well enough for trend measurement, easy to use with ESP32 and esphome.

very good i built this co2 meter

very good i built this co2 meter

very good i built this co2 meter

Nice little sensor, seems to work compared to another slightly more expensive one. Just note that it has "automatic calibration" that is that it comes preset to calibrate it self every 24 hours, that should work fine, provided that there is enough ventilation in the area so that at least at part of every 24 hour period there is clean air. (If you plan to use it in greenhouse or where there is traffic 24 / 7 you will need to turn off the automatic calibration (called ABC)) I am using this with ESP8266 to send the values to Zabbix.

Nice little sensor, seems to work compared to another slightly more expensive one. Just note that it has "automatic calibration" that is that it comes preset to calibrate it self every 24 hours, that should work fine, provided that there is enough ventilation in the area so that at least at part of every 24 hour period there is clean air. (If you plan to use it in greenhouse or where there is traffic 24 / 7 you will need to turn off the automatic calibration (called ABC)) I am using this with ESP8266 to send the values to Zabbix.

Nice little sensor, seems to work compared to another slightly more expensive one. Just note that it has "automatic calibration" that is that it comes preset to calibrate it self every 24 hours, that should work fine, provided that there is enough ventilation in the area so that at least at part of every 24 hour period there is clean air. (If you plan to use it in greenhouse or where there is traffic 24 / 7 you will need to turn off the automatic calibration (called ABC)) I am using this with ESP8266 to send the values to Zabbix.

Works as intended.

Works as intended.

Works as intended.

Worked out of the box. Suggest to someone to purchase either a break out board or the kit with a break out board. the wires are very small and were difficult to put DUPont connectors on.

Worked out of the box. Suggest to someone to purchase either a break out board or the kit with a break out board. the wires are very small and were difficult to put DUPont connectors on.

Worked out of the box. Suggest to someone to purchase either a break out board or the kit with a break out board. the wires are very small and were difficult to put DUPont connectors on.

All good, works well. Thanks

All good, works well. Thanks

All good, works well. Thanks

nice product

nice product

nice product