Flash Assistant
Update your device firmware in 1 click, no coding required. Powered by ESP Web Tools.
Step 1 - Select your device
And the firmware version you want to install
Step 2 - Plug in your device
Use a USB-C cable to plug your device into your computer. The TRMNL branded cable works great if you have one.
Step 3 - Enter 'Flashing mode'
Select a device model above for instructions.
- Turn off the device by flipping the power switch to 'OFF'
- While pressing down on the circular button, flip the power switch to 'ON'
- Let go of the circular button
Coming soon...
Press and hold Key 3 for about 5 seconds.
Press the Reset button, release it, then press and hold the Boot button for 5 seconds.
Press and hold both navigation buttons (left and right) simultaneously for 2 seconds.
Press and hold both navigation buttons (left and right) simultaneously for 2 seconds.
- If you're running X4 default firmware or Crosspoint, wake up the device.
- If you're already running TRMNL firmware, hold the X4 reset button for 3 seconds.
Note: The X4 only remains in a "flashing mode" state for a couple seconds. Follow the prompts in Step 4 immediately after holding the reset button or you'll need to retry.
Step 4 - Flash firmware
- Click the 'Connect' button below
- Select 'USB JTAG/serial...' from the list
- Select 'Install' from the popup menu
- Wait for the device to install the firmware (this may take a minute or two)
- You should see a confirmation message within the popup menu
Step 5 - Restart your device
- Turn the device off by flipping the power switch to 'OFF'
- Wait approximately 15 seconds
- Flip the power switch to 'ON'
Troubleshooting
If you get an error "Failed to execute 'open' on 'SerialPort' during Step 4:
- your USB-C cable might only be capable of charging (not data transfer)
- your device may not yet be in "flashing mode."
Repeat Step 2 or see this guide for additional options.