Control LED via the Bluetooth channel using Arduino+HM-10 BLE board

led-blink-ble-simplest-sketch.ino

#include <SoftwareSerial.h>

#define ledPin 7

SoftwareSerial mySerial(2, 3);

int val;

void setup() {
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, HIGH);
  Serial.begin(9600);
  mySerial.begin(9600);
}
void loop() {
 if(mySerial.available() > 0){
    val = mySerial.read();
    Serial.print("Received: ");
    Serial.println(val);
    if (val == 0) {
      digitalWrite(ledPin, LOW);
      Serial.println("LED: OFF");
    }
    else if (val == 1) {
      digitalWrite(ledPin, HIGH);
      Serial.println("LED: ON");
    }
 }
 delay(100);
}