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Stability: WDT yield, BLE mutex fixes, time-based desync recovery

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Reduces crash rate from every 60-85s to 1 reboot per 6+ minutes.
Zero WDT triggers in 10-minute stability test.

BLE mutex fixes (BLEInterface.cpp):
- Release _mutex before blocking GATT ops in onConnected() and
  onServicesDiscovered() — prevents 5-30s main-loop stalls during
  service discovery, notification subscribe, identity exchange
- Non-blocking try_lock() for peerCount(), getConnectedPeerSummaries(),
  get_stats() — returns empty/default if BLE task holds mutex
- Write-without-response in initiateHandshake()

WDT and persistence (main.cpp, sdkconfig.defaults, microReticulum):
- 30s WDT timeout (up from 10s) for SPIFFS flash I/O headroom
- Register Identity::set_persist_yield_callback() to feed WDT every
  5 entries during save_known_destinations() (70+ entries = 30-50s)
- WDT feeds between reticulum and identity persist calls

BLE host desync recovery (NimBLEPlatform):
- Time-based desync tracking instead of aggressive counter-based reboot
- 60s tolerance without connections, 5 minutes with active connections
  (data still flows over existing BLE mesh links)
- Remove immediate recoverBLEStack() from 574 handler and
  enterErrorRecovery() — let startScan() manage reboot decision
- Increase CONNECTION_COOLDOWN from 3s to 10s to reduce 574 risk
- Increase SCAN_FAIL_RECOVERY_THRESHOLD from 5 to 10

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
torlando-tech
2026-02-23 12:30:30 -05:00
co-authored by Claude Opus 4.6
parent 3ca27f53f6
commit e343caf2d2
7 changed files with 116 additions and 64 deletions
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lib/ble_interface/BLEInterface.h
+1 -1
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@@ -49,7 +49,7 @@ public:
static constexpr double SCAN_INTERVAL = 5.0; // Seconds between scans
static constexpr double KEEPALIVE_INTERVAL = 15.0; // Seconds between keepalives
static constexpr double MAINTENANCE_INTERVAL = 1.0; // Seconds between maintenance
static constexpr double CONNECTION_COOLDOWN = 3.0; // Seconds to wait after connection failure
static constexpr double CONNECTION_COOLDOWN = 10.0; // Seconds between connection attempts (reduces 574 risk)
public:
/**