Bluetooth Smart Switch

Source Code and Pin Mode Arduino UNO to Bluetooth module PIN Mode : RX pin 10 and TX pin 11. Code: #include SoftwareSerial mySerial(10, 11); //Pin 10=TX, Pin 11=RX Bluetooth TX,RX #define relay1 2 //Relay IN1 connected to PinOut 2 Arduino #define relay2 3 //Relay IN2 connected to PinOut 3 Arduino #define relay3 4 //Relay IN3 connected to PinOut 4 Arduino #define relay4 5 //Relay IN4 connected to PinOut 5 Arduino char val; void setup() { pinMode(relay1,OUTPUT); pinMode(relay2,OUTPUT); pinMode(relay3,OUTPUT); pinMode(relay4,OUTPUT); digitalWrite(relay1,HIGH); digitalWrite(relay2,HIGH); digitalWrite(relay3,HIGH); digitalWrite(relay4,HIGH); mySerial.begin(9600); Serial.begin(9600); } void loop() {//cek data serial from bluetooth android App if( mySerial.available() >0 ) { val = mySerial.read(); Serial.println(val); } //Relay is on /* --->you can connected to relay modul 4 channel Serial data sending from Arduino Bluetooth Relay 4CH.apk data '1'-'4' to on is Ralay CH 1-4 data 'A'-'D' to off is Ralay CH 1-4 data '9' to on ALL CH 1-4 data 'I' to off ALL CH 1-4 */ if( val == '1' ) { digitalWrite(relay1,LOW); } else if( val == '2' ) { digitalWrite(relay2,LOW); } else if( val == '3' ) { digitalWrite(relay3,LOW); } else if( val == '4' ) { digitalWrite(relay4,LOW); } //relay all on else if( val == '9' ) { digitalWrite(relay1,LOW); digitalWrite(relay2,LOW); digitalWrite(relay3,LOW); digitalWrite(relay4,LOW); } //relay is off else if( val == 'A' ) { digitalWrite(relay1,HIGH); } else if( val == 'B' ) { digitalWrite(relay2,HIGH); } else if( val == 'C' ) { digitalWrite(relay3,HIGH); } else if( val == 'D' ) { digitalWrite(relay4,HIGH); } //relay all off else if( val == 'I' ) { digitalWrite(relay1,HIGH); digitalWrite(relay2,HIGH); digitalWrite(relay3,HIGH); digitalWrite(relay4,HIGH); } }