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Author SHA1 Message Date
blue
b5d1169392 Rename: product -> "Resound"; firmware roles -> hud/sink/broadcaster 
Product name BikeAudio -> "Resound" (the device isn't bike-specific — works at
home, backyard, camping, parties, group rides). This is the A2DP advertise name
the phone connects to: sink.start("Resound"). All banners/comments + README
updated. (After reflashing the sink, the phone must forget "BikeAudio" and
connect to "Resound".)

Firmware vocabulary clarified (the old hub/sink/source was confusing —
"source" read backwards since those boards SEND audio):
  hub_s3.cpp / env hub_s3        -> hud.cpp / env hud
  board_sink.cpp                 -> sink.cpp        (env sink)
  board_source.cpp               -> broadcaster.cpp (envs broadcaster_headset
                                    0x11, broadcaster_speaker1 0x10,
                                    broadcaster_guest 0x12)
  hub_proto.h                    -> bus_proto.h
default_envs = sink + the three broadcasters. All envs build clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
 2026-06-11 14:14:16 -04:00
blue
66f56f1e09 docs: document touch-pad sync (GPIO4/27), no WiFi UI 
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
 2026-06-10 14:18:05 -04:00
blue
baa3ef7690 3-board relay firmware: sink + I2S + dual source 
Implements the only architecture that can relay iPhone audio to two BT
speakers at once (one ESP32 cannot be A2DP sink+source, and a source holds
only one link):

  iPhone ))BT)) [Board A: A2DP sink -> I2S master]
                      ==I2S bus==> [Board B: I2S slave -> A2DP source] ))BT)) JBL
                      ==I2S bus==> [Board C: I2S slave -> A2DP source] ))BT)) Cardo

- src/board_sink.cpp   : A2DP sink "BikeAudio", forwards decoded PCM to an
  I2S master bus (BCK=5, WS=25, DATA=23); follows negotiated sample rate.
- src/board_source.cpp : I2S slave (BCK=19, WS=18, DATA=22) -> A2DP source,
  target speaker via TARGET_SPEAKER build flag; pads silence on underrun.
- platformio.ini       : 3 envs (sink, source_jbl, source_cardo) sharing an
  [env] base; sources differ only by TARGET_SPEAKER. build_src_filter selects
  the per-board source file. Libs pinned as before.
- README_RELAY.md      : wiring table, I2S bus topology, flash order, pairing,
  and the speaker-sync limitation.

Replaces the single-board src/main.cpp (architecturally impossible). All
three envs build clean. Hardware flash + wiring next.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
 2026-06-10 11:35:12 -04:00