sorry,semicolon error
master:
int pushbutton = 2;
void setup()
{
Serial.begin(9600);
pinMode(2, INPUT);
Serial.print("start ");
}
void loop()
{
digitalRead(pushbutton);
if(digitalRead(pushbutton) == HIGH)
{
Serial.print("D");
}
}
slave:
int led = 3;
void setup()
{
Serial.begin(9600);
pinMode(3,OUTPUT);
Serial.print("start on slave");
}
void loop()
{
if (Serial.available() > 0)
{
if (Serial.read() == "D")
{
digitalWrite(3,HIGH);
}
else
{
digitalWrite(3,LOW);
}
}
}