loop()
在 setup() 程式被執行後, 此程式會重複不停地被呼叫執行. 直到主板關閉電源為止.
Example
const int buttonPin = 3; // setup initializes serial and the button pin void setup() { Serial.begin(9600); pinMode(buttonPin, INPUT); } // loop checks the button pin each time, // and will send serial if it is pressed void loop() { if (digitalRead(buttonPin) == HIGH) Serial.write('H'); else Serial.write('L'); delay(1000); }