torlando-tech c80e63dee9 Fix Task WDT crashes: LVGL priority starvation + BLE WDT false positives ...

Two root causes for frequent device reboots:

1. LVGL task (priority 2) starved loopTask (priority 1) on core 1.
   During heavy screen rendering, loopTask couldn't run for 30+ seconds,
   triggering the Task WDT. Fixed by lowering LVGL to priority 1 so
   FreeRTOS round-robins both tasks fairly.

2. BLE task was registered with the 30s Task WDT, but blocking NimBLE
   GATT operations (connect + service discovery + subscribe + read) can
   legitimately take 30-60s total. Removed BLE task from WDT since
   NimBLE has its own internal ~30s timeouts per GATT operation.

Also added ble_hs_synced() guards to write(), read(), notify(),
writeCharacteristic(), discoverServices(), and enableNotifications()
to prevent use-after-free on stale NimBLE client pointers during
host resets.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-04 14:11:51 -05:00

44 KiB

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