“Have been using these to make little air quality sensors together with a SEN66 and an Adafruit SEN6X breakout and a 3D printed case. Super simple to program it using ESPHome Builder. Works beautifully. And so affordable! Total price for the sensor is about £65 - of which £55 is the SEN66.”
“Nice compact device with battery connectors however Zigbee does not work well on these devices at all. If you're looking for something to use for Zigbee development look elsewhere. I have raised an issue with Seedstudio and will update if they respond.”