BLE Pairing fix (#9701)

* BLE Pairing fix

* gating for consistency

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/graphics/Screen.cpp

@@ -875,6 +875,10 @@ int32_t Screen::runOnce()
             break;
         case Cmd::STOP_ALERT_FRAME:
             NotificationRenderer::pauseBanner = false;
+            // Return from one-off alert mode back to regular frames.
+            if (!showingNormalScreen && NotificationRenderer::current_notification_type != notificationTypeEnum::text_input) {
+                setFrames();
+            }
             break;
         case Cmd::STOP_BOOT_SCREEN:
             EINK_ADD_FRAMEFLAG(dispdev, COSMETIC); // E-Ink: Explicitly use full-refresh for next frame

src/nimble/NimbleBluetooth.cpp

@@ -52,6 +52,20 @@ NimBLEServer *bleServer;
 static bool passkeyShowing;
 static std::atomic<uint16_t> nimbleBluetoothConnHandle{BLE_HS_CONN_HANDLE_NONE}; // BLE_HS_CONN_HANDLE_NONE means "no connection"
 
+static void clearPairingDisplay()
+{
+    if (!passkeyShowing) {
+        return;
+    }
+
+    passkeyShowing = false;
+#if HAS_SCREEN
+    if (screen) {
+        screen->endAlert();
+    }
+#endif
+}
+
 class BluetoothPhoneAPI : public PhoneAPI, public concurrency::OSThread
 {
     /*
@@ -630,13 +644,7 @@ class NimbleBluetoothServerCallback : public NimBLEServerCallbacks
 
         meshtastic::BluetoothStatus newStatus(meshtastic::BluetoothStatus::ConnectionState::CONNECTED);
         bluetoothStatus->updateStatus(&newStatus);
-
-        // Todo: migrate this display code back into Screen class, and observe bluetoothStatus
-        if (passkeyShowing) {
-            passkeyShowing = false;
-            if (screen)
-                screen->endAlert();
-        }
+        clearPairingDisplay();
 
         // Store the connection handle for future use
 #ifdef NIMBLE_TWO
@@ -693,6 +701,7 @@ class NimbleBluetoothServerCallback : public NimBLEServerCallbacks
 
         meshtastic::BluetoothStatus newStatus(meshtastic::BluetoothStatus::ConnectionState::DISCONNECTED);
         bluetoothStatus->updateStatus(&newStatus);
+        clearPairingDisplay();
 
         if (bluetoothPhoneAPI) {
             bluetoothPhoneAPI->close();

src/platform/nrf52/NRF52Bluetooth.cpp

@@ -32,6 +32,7 @@ static uint8_t toRadioBytes[meshtastic_ToRadio_size];
 static uint8_t lastToRadio[MAX_TO_FROM_RADIO_SIZE];
 
 static uint16_t connectionHandle;
+static bool passkeyShowing;
 
 class BluetoothPhoneAPI : public PhoneAPI
 {
@@ -86,6 +87,16 @@ void onDisconnect(uint16_t conn_handle, uint8_t reason)
     // Notify UI (or any other interested firmware components)
     meshtastic::BluetoothStatus newStatus(meshtastic::BluetoothStatus::ConnectionState::DISCONNECTED);
     bluetoothStatus->updateStatus(&newStatus);
+
+#if HAS_SCREEN
+    // If a pairing prompt is active, make sure we dismiss it on disconnect/cancel/failure paths.
+    if (passkeyShowing) {
+        passkeyShowing = false;
+        if (screen) {
+            screen->endAlert();
+        }
+    }
+#endif
 }
 void onCccd(uint16_t conn_hdl, BLECharacteristic *chr, uint16_t cccd_value)
 {
@@ -400,6 +411,8 @@ bool NRF52Bluetooth::onPairingPasskey(uint16_t conn_handle, uint8_t const passke
         });
     }
 #endif
+    passkeyShowing = true;
+
     if (match_request) {
         uint32_t start_time = millis();
         while (millis() < start_time + 30000) {
@@ -451,6 +464,7 @@ void NRF52Bluetooth::onPairingCompleted(uint16_t conn_handle, uint8_t auth_statu
     }
 
     // Todo: migrate this display code back into Screen class, and observe bluetoothStatus
+    passkeyShowing = false;
     if (screen) {
         screen->endAlert();
     }