TDeckBoard.cpp — both * 3 / 2 thresholds changed to > designCapacity_mAh, so FCC=3000 with DC=2500 now triggers the Qmax + stored FCC correction.

SerialBLEInterface.cpp — added esp_bt.h include and three esp_ble_tx_power_set calls at +9 dBm after BLEDevice::init(), covering default, advertising, and scan power types.

MyMesh.h — FIRMWARE_VER_CODE bumped from 10 → 11.
MyMesh.cpp — The RESP_CODE_DEVICE_INFO frame construction now:
Byte 2: sends 0xFF (sentinel) when MAX_CONTACTS > 510, otherwise the normal MAX_CONTACTS / 2. Older apps interpret 0xFF as 510 contacts — completely harmless.
Bytes 80-81 (new, appended after the version string): uint16_t little-endian with the true MAX_CONTACTS value. Apps that understand v11+ read it here. Apps < v11 ignore trailing bytes — the BLE/serial frame protocol is length-delimited, so extra bytes at the tail are safe.

platformio.ini — Both BLE builds (meck_audio_ble, meck_4g_ble) bumped from 510 → 2000.

mymesh.cpp: writeContactRespFrame return type change (return _serial->writeFrame() result)
checkSerialInterface() batch-fill loop.

variants/lilygo_tdeck_pro/TDeckBoard.cpp

@@ -199,7 +199,7 @@ bool TDeckBoard::configureFuelGauge(uint16_t designCapacity_mAh) {
     // Design Capacity correct, but check if Full Charge Capacity is sane.
     uint16_t fcc = bq27220_read16(BQ27220_REG_FULL_CAP);
     Serial.printf("BQ27220: Design Capacity already correct, FCC=%d mAh\n", fcc);
-    if (fcc >= designCapacity_mAh * 3 / 2) {
+    if (fcc > designCapacity_mAh) {
       // FCC is >=150% of design — stale from factory defaults (typically 3000 mAh).
       uint16_t designEnergy = (uint16_t)((uint32_t)designCapacity_mAh * 37 / 10);
       Serial.printf("BQ27220: FCC %d >> DC %d, checking Design Energy (target %d mWh)\n",
@@ -344,7 +344,7 @@ bool TDeckBoard::configureFuelGauge(uint16_t designCapacity_mAh) {
       fcc = bq27220_read16(BQ27220_REG_FULL_CAP);
       Serial.printf("BQ27220: FCC after RESET: %d mAh (target <= %d)\n", fcc, designCapacity_mAh);
 
-      if (fcc > designCapacity_mAh * 3 / 2) {
+      if (fcc > designCapacity_mAh) {
         // RESET didn't fix FCC — the gauge IT algorithm is stubbornly
         // retaining its learned value. This typically resolves after one
         // full charge/discharge cycle. Software clamp in

variants/lilygo_tdeck_pro/platformio.ini

@@ -105,13 +105,15 @@ lib_deps =
 ; ---------------------------------------------------------------------------
 
 ; Audio + BLE companion (audio-player hardware with BLE phone bridging)
-; MAX_CONTACTS=500 is near BLE protocol ceiling (MAX_CONTACTS/2 sent as uint8_t, max 510)
+; MAX_CONTACTS=2000 — protocol v11+ sends true capacity in extended DEVICE_INFO field.
+; Older apps see 510 (sentinel 0xFF in legacy byte) and still work correctly.
+; Contact + sort arrays allocated in PSRAM via BaseChatMesh::initContacts().
 [env:meck_audio_ble]
 extends = LilyGo_TDeck_Pro
 build_flags =
   ${LilyGo_TDeck_Pro.build_flags}
   -I examples/companion_radio/ui-new
-  -D MAX_CONTACTS=510
+  -D MAX_CONTACTS=2000
   -D MAX_GROUP_CHANNELS=20
   -D BLE_PIN_CODE=123456
   -D OFFLINE_QUEUE_SIZE=256
@@ -155,7 +157,7 @@ build_flags =
   -D MECK_AUDIO_VARIANT
   -D MECK_WEB_READER=1
   -D MECK_OTA_UPDATE=1
-  -D FIRMWARE_VERSION='"Meck v1.6.WiFi"'
+  -D FIRMWARE_VERSION='"Meck v1.6.1.WiFi"'
 build_src_filter = ${LilyGo_TDeck_Pro.build_src_filter}
   +<helpers/esp32/*.cpp>
   +<helpers/ui/MomentaryButton.cpp>
@@ -205,20 +207,22 @@ lib_ignore =
   ESP32 BLE Arduino
 
 ; 4G + BLE companion (4G modem hardware, no audio — GPIO conflict with PCM5102A)
-; MAX_CONTACTS=500 is near BLE protocol ceiling (MAX_CONTACTS/2 sent as uint8_t, max 510)
+; MAX_CONTACTS=2000 — protocol v11+ sends true capacity in extended DEVICE_INFO field.
+; Older apps see 510 (sentinel 0xFF in legacy byte) and still work correctly.
+; Contact + sort arrays allocated in PSRAM via BaseChatMesh::initContacts().
 [env:meck_4g_ble]
 extends = LilyGo_TDeck_Pro
 build_flags =
   ${LilyGo_TDeck_Pro.build_flags}
   -I examples/companion_radio/ui-new
-  -D MAX_CONTACTS=510
+  -D MAX_CONTACTS=2000
   -D MAX_GROUP_CHANNELS=20
   -D BLE_PIN_CODE=123456
   -D OFFLINE_QUEUE_SIZE=256
   -D HAS_4G_MODEM=1
   -D MECK_WEB_READER=1
   -D MECK_OTA_UPDATE=1
-  -D FIRMWARE_VERSION='"Meck v1.6.4G"'
+  -D FIRMWARE_VERSION='"Meck v1.6.1.4G"'
 build_src_filter = ${LilyGo_TDeck_Pro.build_src_filter}
   +<helpers/esp32/*.cpp>
   +<helpers/ui/MomentaryButton.cpp>
@@ -254,7 +258,7 @@ build_flags =
   -D HAS_4G_MODEM=1
   -D MECK_WEB_READER=1
   -D MECK_OTA_UPDATE=1
-  -D FIRMWARE_VERSION='"Meck v1.6.4G.WiFi"'
+  -D FIRMWARE_VERSION='"Meck v1.6.1.4G.WiFi"'
 build_src_filter = ${LilyGo_TDeck_Pro.build_src_filter}
   +<helpers/esp32/*.cpp>
   +<helpers/ui/MomentaryButton.cpp>
@@ -287,7 +291,7 @@ build_flags =
   -D HAS_4G_MODEM=1
   -D MECK_WEB_READER=1
   -D MECK_OTA_UPDATE=1
-  -D FIRMWARE_VERSION='"Meck v1.6.4G.SA"'
+  -D FIRMWARE_VERSION='"Meck v1.6.1.4G.SA"'
 build_src_filter = ${LilyGo_TDeck_Pro.build_src_filter}
   +<helpers/esp32/*.cpp>
   +<helpers/ui/MomentaryButton.cpp>
@@ -422,5 +426,4 @@ lib_ignore =
  ESPAsyncWebServer
  AsyncElegantOTA
  ESP32-audioI2S
- esp32_codec2_arduino
- 
+ esp32_codec2_arduino