I can’t speak to why there’s a limit but you can export your history as a CSV from within the app: as long as you export at least once every 7 days, you’d have

I can’t speak to why there’s a limit but you can export your history as a CSV from within the app: as long as you export at least once every 7 days, you’d have a full history through the life of the device. The CSV contains datapoints for each recording (default to 5 mins but use configurable): Time(dd/mm/yyyy), Carbon dioxide(ppm), Temperature(°C), Relative humidity(%), Atmospheric pressure(hPa) I’m very impressed by the device and recommend it.