Hi @uncle_t !
Regarding the temperature readings, an offset of around 4 C is something we’re aware of with the AirGradient Go. This is mainly due to heat generated by the internal components and the compact enclosure.
We haven’t implemented temperature correction in the firmware yet, but we’re working on it. We’re also considering removing temperature readings from the main display, as it’s difficult to achieve completely accurate ambient temperature measurements in a device of this size.
For CO2, could you please confirm whether you performed the manual calibration outdoors in fresh air? This is important because the calibration assumes the monitor is exposed to outdoor CO2 levels.
The Go also uses Automatic Baseline Calibration (ABC), which is set to an 8-day cycle by default. Since your monitor is new, I recommend allowing at least 8 days for the readings to stabilize.
Regarding firmware updates, the latest FW version becomes available automatically here: AirGradient Monitor Firmware Updates | AirGradient Knowledge Base