#include <SoftwareSerial.h>
int Rxpin=0;
int Txpin=1;
int relay=3;
SoftwareSerial BTSerial(Rxpin,Txpin);
void setup()
{
pinMode(relay,OUTPUT);
BTSerial.begin(9600);
}
void loop(){
char read=BTSerial.read();
if(read=="1"){
digitalWrite(relay,1)
}
else{
digitalWrite(relay,0)
}
}
Note : That this code is not verified. Please make sure you verify it.
Explain: