1. Go to https://meshcore.io
2. Go to the Flasher (select from top menu)
3. In the filter box, type "tag" and select the tag
4. Select the Companion Bluetooth
5. Connect device to the PC USB
6. Click Enter DFU mode, select the TinyUSB Serial and click connect
7. With the device in DFU mode, click the Flash! button
8. Select the nRF Serial device and click connect
9. Wait for flashing to complete
10. Use the phone app to connect to the node and configure (default Bluetooth PIN is 123456)