Files
HaloKeymind/examples
agessaman 34a8220111 feat(mqtt): add neighbor-scope discovery + periodic publish to MyMesh
Port the neighbor-discovery state machine from mqtt-bridge-implementation-flex,
adapted to this branch's MyMesh (WebConfig members shifted the insertion points;
applied by content).

- Two-stage periodic refresh in loop() driven by mqtt_neighbors_interval:
  stage 1 is a zero-hop sendNodeDiscoverReq() (reuses the existing 60s window),
  stage 2 (startNeighborDiscover) fires one anon-regions scope query per heard
  neighbour, then finishNeighborDiscover() builds the table JSON via
  MQTTMessageBuilder::buildNeighborsMessage and hands it to
  bridge->requestPublishNeighbors().
- Peer overlay at NEIGHBOR_DISCOVER_PEER_BASE lets scope-query RESPONSE packets
  from non-ACL neighbours decrypt: searchPeersByHash prepends heard neighbours
  (bounded by MAX_CLIENTS), getPeerSharedSecret derives the secret on the fly,
  and onPeerDataRecv routes both overlay-index and ACL-client-that-is-a-neighbour
  responses into handleNeighborDiscoverResponse.
- Entries ordered most- to least-useful (recent, then stronger SNR) so the JSON
  builder's tail-drop keeps the useful head.
- `discover.scopes` CLI command (manual trigger), with a WITH_MQTT_BRIDGE stub
  replying "requires PSRAM" on non-PSRAM builds.
- Reports schedule to the bridge each loop via setNeighborsSchedule().
- Uses ArduinoJson v7 JsonDocument (not deprecated DynamicJsonDocument).

All gated on WITH_MQTT_NEIGHBORS. Reuses the existing MQTTBridge* member.
Verified: T_Beam_S3_Supreme_SX1262_repeater_observer_mqtt builds [SUCCESS].
2026-07-19 22:39:41 -07:00
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