Added bluetoothSerial logger

src/main.cpp

@@ -0,0 +1,41 @@
+#include <Arduino.h>
+
+/*Program to control LED (ON/OFF) from ESP32 using Serial Bluetooth
+ * Thanks to Neil Kolbans for his efoorts in adding the support to Arduino IDE
+ * Turotial on: www.circuitdigest.com&nbsp;
+ */
+
+#include "BluetoothSerial.h" //Header File for Serial Bluetooth, will be added by default into Arduino
+BluetoothSerial ESP_BT; //Object for Bluetooth
+
+int incoming;
+
+void setup() {
+  Serial.begin(9600); //Start Serial monitor in 9600
+  ESP_BT.begin("ESP32_LED_Control"); //Name of your Bluetooth Signal
+  Serial.println("Bluetooth Device is Ready to Pair");
+  pinMode (LED_BUILTIN, OUTPUT);//Specify that LED pin is output
+}
+
+
+void loop() {
+  if (ESP_BT.available()) { //Check if we receive anything from Bluetooth
+    incoming = ESP_BT.read(); //Read what we recevive 
+    Serial.print("Received:"); Serial.println(incoming);
+    if (incoming == 49) {
+        digitalWrite(LED_BUILTIN, HIGH);
+        ESP_BT.println("LED turned ON");
+    }
+
+    if (incoming == 48) {
+        digitalWrite(LED_BUILTIN, LOW);
+        ESP_BT.println("LED turned OFF");
+    }     
+
+    if (incoming == 57) {
+        ESP_BT.println("[APP] Free memory: " + String(esp_get_free_heap_size()) + " bytes");
+    }     
+  }
+
+  delay(1000);
+}