Experimental: a Cairn companion for the GAT562 30S Mesh Kit on the Wio Tracker L1 Pro's interface (#45). It builds but hasn't run on a kit yet. Please tell us what you see.
What experimental builds are. Use MeshCore-GAT562MeshKit-Cairn131-2026-11-11-ble.uf2 unless you want the app over a USB cable.
Cairn 131 for the GAT562 30S Mesh Kit -- companion test build (2026-11-11)
For the GAT562 30S Mesh Kit (nRF52840, SX1262, 0.96" SSD1306 OLED, five-way joystick and Back).
Nothing in it can damage the board, and you can always copy MeshCore or Meshtastic back the same way.
What it is:
- The Wio Tracker L1 Pro's interface in place of the one-button one from the Cairn 107 preview: the
whole joystick, so up and down work in every list, and Back goes back.
- No Flip screen setting: this board's screen driver can't turn the panel.
- Everything in Cairn 131. Pair it from the Cairn app (CairnOS) or the MeshCore app, as any companion.
The online update never offers this build: copy the next one by hand.
Files:
MeshCore-GAT562MeshKit-Cairn131-2026-11-11-ble.uf2 the app over Bluetooth
MeshCore-GAT562MeshKit-Cairn131-2026-11-11-usb.uf2 the app over the USB cable
INSTALL IT
1. Plug the kit into a computer with a USB-C data cable.
2. Double-tap the Reset button. A USB drive appears.
3. Copy one of the .uf2 files above onto that drive. It disconnects by itself and the board restarts
into Cairn. Back up your node's private key from the app first: this build hasn't been tried over
another firmware's data yet.
WHAT TO TELL US
- Do all five joystick directions and Back do what you expect?
- Do the screen, battery reading, GPS and buzzer work?
- Does it pair? Is the pairing PIN on the screen?
- Anything that looks wrong compared to the L1 Pro?
- A boot log helps either way: open a serial monitor at 115200 baud, press Reset, and copy the first
60 lines or so.