Step 1 - Plug in your device

Use a USB-C cable to plug in your device to your computer.

Any cable capable of data transfer works, including the optional TRMNL Cable accessory.

Step 2 - Enter 'Flashing mode'

1. Turn off the device by flipping the power switch to 'OFF'
2. While pressing down on the circular button, flip the power switch to 'ON'
3. Let go of the circular button

Step 3 - Select your device

And the firmware version you want to install

Step 4 - Flash firmware

1. Click the 'Connect' button below
2. Select 'USB JTAG/serial...' from the list
3. Select 'Install' from the popup menu
4. Wait for the device to install the firmware (this may take a minute or two)
5. You should see a confirmation message within the popup menu

Step 5 - Restart your device

1. Turn the device off by flipping the power switch to 'OFF'
2. Wait approximately 15 seconds
3. Flip the power switch to 'ON'