Every TRMNL has 2 immutable characteristics -- a Mac Address, and a Serial.
Mac Addresses are generated by our manufacturer, and Serial values are printed directly on the PCB (circuit board).
In some cases, TRMNL may need to know one of these values to help debug a connection issue. If you can't find your MAC, you can instead disassemble your device.
Open your TRMNL
Taking apart your TRMNL does not void any warranties, just watch our video to do it safely.
Once open, you will see a small QR code with a 5 digit value beneath it.
In this example, the Serial is 01174.
Let us know
Send us a live chat (bottom right chat icon) or email team@usetrmnl.com if you need help leveraging your Serial to resolve an issue.