From ef80c2638c1a1bc3239bd655712dbca585edbb01 Mon Sep 17 00:00:00 2001
From: "jacob.eva" <x00010@disroot.org>
Date: Wed, 16 Oct 2024 16:15:29 +0100
Subject: [PATCH] Fix BLE service duplication bug on nRF52

---
 Bluetooth.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Bluetooth.h b/Bluetooth.h
index ee3964e..60cf86a 100644
--- a/Bluetooth.h
+++ b/Bluetooth.h
@@ -32,6 +32,7 @@
   BLEUart SerialBT;
   BLEDis  bledis;
   BLEBas  blebas;
+  bool SerialBT_init = false;
 #endif
 
 #define BT_PAIRING_TIMEOUT 35000
@@ -502,10 +503,14 @@ void bt_disconnect_callback(uint16_t conn_handle, uint8_t reason) {
       // start device information service
       bledis.begin();
 
-      SerialBT.bufferTXD(true); // enable buffering
+      // Guard to ensure SerialBT service is not duplicated through BT being power cycled
+      if (!SerialBT_init) {
+          SerialBT.bufferTXD(true); // enable buffering
 
-      SerialBT.setPermission(SECMODE_ENC_WITH_MITM, SECMODE_ENC_WITH_MITM); // enable encryption for BLE serial
-      SerialBT.begin();
+          SerialBT.setPermission(SECMODE_ENC_WITH_MITM, SECMODE_ENC_WITH_MITM); // enable encryption for BLE serial
+          SerialBT.begin();
+          SerialBT_init = true;
+      }
 
       blebas.begin();