- Power off the old board and install the new one the same way.
- Add the new board to the same room with its QR code.
- When the app asks What is this circuit?, choose Replaces … and pick the old board.
- Finish the Wi-Fi step. All devices (and sensors) move to the new board by themselves, and the old board is removed.
Tip: You can also move devices later: More → Hardware → the old board → Replaced this board?