串口通信-- Arduino端

button.ino

void setup()
{
    Serial.begin(9600);
    pinMode(13, OUTPUT);
    digitalWrite(13, HIGH);
}

int led = 1;

void loop()
{
    if(Serial.available())
    {
        Serial.read();
        led = 1 -  led;
        if(led > 0)
        {
             digitalWrite(13, LOW);
         }
         else
         {
              digitalWrite(13, HIGH);
          }
    }
}