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Relay ON/OFF with Smart phone app
void setup() {
// Open serial communications:
Serial.begin(9600);
pinMode(2, OUTPUT);
// send an intro:
Serial.println("Enter a value");
Serial.println();
}
void loop() {
// get any incoming bytes:
if (Serial.available() > 0) {
int thisChar = Serial.read();
// say what was sent:
Serial.print("You sent me: \'");
Serial.write(thisChar);
if (thisChar=='h')
{
digitalWrite(2, HIGH);
}
else {
digitalWrite(2, LOW);
}
Serial.print("\' ASCII Value: ");
Serial.println(thisChar);
Serial.println();
Serial.println("Give me another byte:");
Serial.println();
}
}
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