Follow these steps to update the temperature‑display units on your Atmocube display device:
Install the nRF Connect app
Scan for ATE42 device
Open nRF Connect and tap Scan.
Locate and select ATE42 from the list of devices.
Connect to the device
Tap Connect to establish a BLE connection.
Troubleshooting: If you’re unable to connect, reboot the device by removing and reinserting the batteries. https://support.atmotube.com/en/articles/11798783-replacing-atmocube-display-batteries
Open the UART service
In the services list, find UART.
Tap Send under the RX Characteristic (this is where you enter commands).
Enter the unit‑change command
Use UTF‑8 encoding on iOS devices.
Commands:
t_unit 0 → Switch to Celsius
t_unit 1 → Switch to Fahrenheit
Send the command
Tap Send to transmit your command to the Atmocube Display.
Verify the change
The display will refresh immediately, showing temperatures in your selected unit.