SerialBT-SPP.ino

//This example code is in the Public Domain (or CC0 licensed, at your option.)
//By Evandro Copercini - 2018
//
//This example creates a bridge between Serial and Classical Bluetooth (SPP)
//and also demonstrate that SerialBT have the same functionalities of a normal Serial

#include "BluetoothSerial.h"
#include <M5StickC.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() {
  M5.begin();
  Serial.begin(115200);
  SerialBT.begin("ESP32test"); //Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
}

void loop() {
  M5.update();
  
  if ( M5.BtnA.wasPressed() ) {
    Serial.println("BtnA.wasPressed() == TRUE");
    M5.Lcd.fillScreen(WHITE);
    SerialBT.write(0xFE);
    SerialBT.write(0xFE);

    SerialBT.write(0xA2);
    SerialBT.write(0xE0);

    SerialBT.write(0x1C);
    SerialBT.write(0x00);
    SerialBT.write(0x01);

    SerialBT.write(0xFD);
  }
 
  if ( M5.BtnA.wasReleased() ) {
    Serial.println("BtnA.wasReleased() == TRUE");
    M5.Lcd.fillScreen(BLACK);
    SerialBT.write(0xFE);
    SerialBT.write(0xFE);

    SerialBT.write(0xA2);
    SerialBT.write(0xE0);

    SerialBT.write(0x1C);
    SerialBT.write(0x00);
    SerialBT.write(0x00);

    SerialBT.write(0xFD);

  }

//  if (Serial.available()) {
//    SerialBT.write(Serial.read());
//  }
//  if (SerialBT.available()) {
//    if (SerialBT.read() == 0xFE &&
//    SerialBT.read() == 0xFE &&
//    SerialBT.read() == 0xE0 &&
//    SerialBT.read() == 0xA2 &&
//    SerialBT.read() == 0x04)
//    {
//      Serial.println("Command Recv");
//      Serial.println("Mode = ");
//      Serial.write(SerialBT.read() + 0x30);
//      Serial.write(SerialBT.read() + 0x30);
//    }
//    
////    Serial.write(SerialBT.read());
//  }
  delay(20);
}