Simple Bluetooth with ESP32 - Help

Hi Violet,

Do not worry, you do not have to use BLE if your project does not require it. ESP32 supports both Bluetooth Low Energy (BLE) and Classic Bluetooth.

The one that you use with HC-05 is classic Bluetooth, so to use classic Bluetooth with ESP32 you can make use of the BluetoothSerial library from espressif itself. Once you include the library you can code it similar to using HC-05. I am pasting the example sketch below 

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

BluetoothSerial SerialBT;

void setup() {
Serial.begin(115200);
SerialBT.begin("ESP32test"); //Bluetooth device name
Serial.println("The device started, now you can pair it with bluetooth!");
}

void loop() {
if (Serial.available()) {
SerialBT.write(Serial.read());
}
if (SerialBT.available()) {
Serial.write(SerialBT.read());
}
delay(20);
}

If you have installed the ESP32 support for Arduino recently then this library should have been added by default 

Hi Aswinth, Thanks for the quick reply.

I have added the board details to Arduino long before, so I did not have that library installed by default. So I downloaded the folder from GIT and pasted in my lib location and I still get errors. 

The error occurs with BluetoothSerial Library only other example programs like BLE_notify BLE_server etc are working properly and I am even able to connect and pair with the ESP32 from my phone