correct version of BLE libraries

last working version of this library with the ESP32 env revision pointed in the wiki

lib/ESP32_BLE_Arduino/examples/BLE_notify/BLE_notify.ino

@@ -23,10 +23,8 @@
 #include <BLEUtils.h>
 #include <BLE2902.h>
 
-BLEServer* pServer = NULL;
-BLECharacteristic* pCharacteristic = NULL;
+BLECharacteristic *pCharacteristic;
 bool deviceConnected = false;
-bool oldDeviceConnected = false;
 uint8_t value = 0;
 
 // See the following for generating UUIDs:
@@ -55,7 +53,7 @@ void setup() {
   BLEDevice::init("MyESP32");
 
   // Create the BLE Server
-  pServer = BLEDevice::createServer();
+  BLEServer *pServer = BLEDevice::createServer();
   pServer->setCallbacks(new MyServerCallbacks());
 
   // Create the BLE Service
@@ -83,23 +81,13 @@ void setup() {
 }
 
 void loop() {
-    // notify changed value
-    if (deviceConnected) {
-        pCharacteristic->setValue(&value, 1);
-        pCharacteristic->notify();
-        value++;
-        delay(10); // bluetooth stack will go into congestion, if too many packets are sent
-    }
-    // disconnecting
-    if (!deviceConnected && oldDeviceConnected) {
-        delay(500); // give the bluetooth stack the chance to get things ready
-        pServer->startAdvertising(); // restart advertising
-        Serial.println("start advertising");
-        oldDeviceConnected = deviceConnected;
-    }
-    // connecting
-    if (deviceConnected && !oldDeviceConnected) {
-        // do stuff here on connecting
-        oldDeviceConnected = deviceConnected;
-    }
+
+  if (deviceConnected) {
+    Serial.printf("*** NOTIFY: %d ***\n", value);
+    pCharacteristic->setValue(&value, 1);
+    pCharacteristic->notify();
+    //pCharacteristic->indicate();
+    value++;
+  }
+  delay(2000);
 }