Tested with both our fork AND upstream RNode firmware — neither
can receive LoRa packets on this T-Beam Supreme unit. TX works
(14KB transmitted via rnsd), noise floor measured (-86 dBm),
airtime detected from watch beacon, but RX_DONE interrupt never
fires. Decoded packets = 0 in all tests.
The watch beacon firmware is verified correct:
- IFAC crypto: all 4 tests PASS (Python round-trip verified)
- Packet format: byte-for-byte match with Python IFAC apply
- IFAC key: stored correctly in NVS, matches computed value
To verify the beacon end-to-end, a working RNode receiver is
needed (different T-Beam unit, Heltec, or the GL.inet's RNode
brought within range).
