chairco/memo.md

## memo.md

      
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              memo.md
            
          
    控制 led 燈

1411 modem, command
1413 debug, upload program

#define BAUDRATE 19200
#define LED_PIN 13

void setup() {
  // put your setup code here, to run once:
  Serial.begin(BAUDRATE);
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int d;
  while(Serial.available()){
    d = Serial.read();
    if(d == '0'){
      digitalWrite(LED_PIN, LOW);   #熄滅
    }
    else if(d == '1'){
      digitalWrite(LED_PIN, HIGH);  #亮燈
    }
   }
}