Luxorparts Relémodul for utviklingskortet D1 Mini

eksempelkode:
/*
* Relay Shield - Blink
* Turns on the relay for two seconds, then off for two seconds, repeatedly.
* Relay Shield transistor closes relay when D1 is HIGH
*/
const int relayPin = D1;
const long interval = 2000; // pause for two seconds
void setup() {
pinMode(relayPin, OUTPUT);
}
void loop() {
digitalWrite(relayPin, HIGH); // turn on relay with voltage HIGH
delay(interval); // pause
digitalWrite(relayPin, LOW); // turn off relay with voltage LOW
delay(interval); // pause
}