The AL-CO2-TVOC-W does not convert the temperature of the built-in sensor. When the engineering units is switched to degrees F (modbus 104), the display will switch the “C” to an “F” but the temperature value stays in degrees C.
Both software version (modbus 4) and firmware version (modbus 9) show value of 0. Is there a update?
The description for the AL-CO2-TVOC-W is: “Air Lab & PM2.5 Particle Sensor with color LCD, Clock, Temperature, Humidity, CO2, TVOC,OCC, WIFI, RS485 MSTP and Modbus.”
- The description “OCC” I thought would mean that the light and sound values could be used to determine occupancy, but those values are not changing, the sound is reporting 141 constant (modbus 640) and the light is reporting 3472 (mod 628).
- The description has “Clock” but I see no Clock settings/values, but that is okay as I do not really want the clock.