Table
Interactive board
The wand is a peripheral. The board is the host: BLE central, NFC reader, dock, and the speaker that does the thunder. Nineteen hexes, radius two — enough to prove pointing without building a whole campaign map.
- Host
- Raspberry Pi 5 or ESP32-S3 as BLE central
- Surface
- Printed or e-ink map over a 19-hex grid (radius 2)
- Under map
- NTAG213 per hex, steel puck cores, optional IR photodiodes, PN5180 reader zone
- Audio split
- Board-class speaker for thunder; wand is near-field only
- Dock
- Edge cradle with magnet + 5 V pogo, known pose for IMU reset
- Wands
- Up to four, identity from NFC UID