//arduino uno wiring
//BLE4.0 UNO
//VCC----->3.3V
//GND----->GND
//EN------>GND
//RX------>TX
//TX------>RX
//BCTS(NC)
//BRTS---->GND
int LED = 13;
void setup()
{
pinMode(LED,OUTPUT);
Serial.begin(115200); // baudrate 115200
while (!Serial); // wait for serial port to connect. Needed for Leonardo only
}
void loop()
{
if (Serial.available() > 0) {
char inChar = (char)Serial.read(); //read serial port data read serial port data
Serial.write(inChar); //send back received data, if the phone app can read the return data means the communication is working well
if(inChar == 'B'){
digitalWrite(LED,HIGH); //led on when press button B
}
else if(inChar == 'R'){
digitalWrite(LED,LOW); //led off when press button R
}
}
}