allow initialisation outside of begin()

 - originally raised in upstream T-vK/ESP32-BLE-Keyboard#248

Author: webmonkey

NimBleKeyboard.cpp

@@ -89,9 +89,19 @@ BleKeyboard::BleKeyboard(std::string deviceName, std::string deviceManufacturer,
     , deviceManufacturer(std::string(deviceManufacturer).substr(0,15))
     , batteryLevel(batteryLevel) {}
 
+void BleKeyboard::init(void)
+{
+  if(!initialised) {
+    BLEDevice::init(deviceName);
+    BLEServer* pServer = BLEDevice::createServer();
+    pServer->setCallbacks(this);
+    initialised = true;
+  }
+}
+
 void BleKeyboard::begin(void)
 {
-  NimBLEDevice::init(deviceName);
+  init();
   NimBLEServer* pServer = NimBLEDevice::createServer();
   pServer->setCallbacks(this);
   // Set server auto-restart advertise on
@@ -506,4 +516,4 @@ void BleKeyboard::delay_ms(uint64_t ms) {
     }
     while(esp_timer_get_time() < e) {}
   }
-}
+}

NimBleKeyboard.h

@@ -124,6 +124,7 @@ class BleKeyboard : public Print, public NimBLEServerCallbacks, public NimBLECha
   bool               connected = false;
   uint32_t           _delay_ms = 7;
   void delay_ms(uint64_t ms);
+  bool              initialised = false;
 
   uint16_t vid       = 0x05ac;
   uint16_t pid       = 0x820a;
@@ -132,6 +133,7 @@ class BleKeyboard : public Print, public NimBLEServerCallbacks, public NimBLECha
 public:
   BleKeyboard(std::string deviceName = "ESP32 Keyboard", std::string deviceManufacturer = "Espressif", uint8_t batteryLevel = 100);
   void begin(void);
+  void init(void);
   void end(void);
   void sendReport(KeyReport* keys);
   void sendReport(MediaKeyReport* keys);