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[pioarduino] Workaround BLE stability issues on reconnect to certain Android phones #10220

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Merged
vidplace7 merged 2 commits into from
Apr 21, 2026
+11 −1
Merged

[pioarduino] Workaround BLE stability issues on reconnect to certain Android phones #10220

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829b196
Temporarily lower CORE_DEBUG_LEVEL to INFO to avoid triggering an app…
cpatulea Apr 21, 2026
6053f56
Temporarily disable ble_gap_set_data_len, causes crash with Pixel 8 A…
cpatulea Apr 21, 2026
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6 changes: 6 additions & 0 deletions src/nimble/NimbleBluetooth.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -620,12 +620,18 @@ class NimbleBluetoothServerCallback : public BLEServerCallbacks

const uint16_t connHandle = desc->conn_handle;

// With Google Pixel 8 Android devices, this causes ESP32 device crash
// when phone reconnects. Disable this to make progress on the
// Arduino v3 migration while we investigate the Android compatibility
// issue.
#if 0
int dataLenResult = ble_gap_set_data_len(connHandle, kPreferredBleTxOctets, kPreferredBleTxTimeUs);
if (dataLenResult == 0) {
LOG_INFO("BLE conn %u requested data length %u bytes", connHandle, kPreferredBleTxOctets);
} else {
LOG_WARN("Failed to raise data length for conn %u, rc=%d", connHandle, dataLenResult);
}
#endif
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LOG_INFO("BLE conn %u peer MTU %u (target %u)", connHandle, pServer->getPeerMTU(connHandle), kPreferredBleMtu);
pServer->updateConnParams(connHandle, 6, 12, 0, 200);
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6 changes: 5 additions & 1 deletion variants/esp32/esp32-common.ini
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Expand Up @@ -38,7 +38,11 @@ build_flags =
-Isrc/platform/esp32
-std=gnu++17
-DLOG_LOCAL_LEVEL=ESP_LOG_DEBUG
-DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG
# DO NOT INCREASE THIS TO DEBUG. It appears to trigger a bug in ESP-IDF
# Bluetooth stack with Pixel 8 Android devices:
# https://github.com/espressif/esp-idf/issues/18126#issuecomment-4286197744
# Once the bug is resolved, we can remove this warning.
-DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_INFO
-DMYNEWT_VAL_BLE_HS_LOG_LVL=LOG_LEVEL_CRITICAL
-DAXP_DEBUG_PORT=Serial
-DESP_OPENSSL_SUPPRESS_LEGACY_WARNING
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