Example Code for Arduino-Relay Control

Hardware Preparation

• DFRduino UNO R3 + Gravity: IO expansion Board (or similar) x 1
• Gravity: Easy relay module x 1

Software Preparation

• Arduino IDE

Wiring Diagram

Sample Code

/*
* @DFRobot
* @author Gangxiao Xue
* @version  V1.0
* @date  2019-11-27
*/
const int PIN=7;                   //define var
void setup() {
  pinMode(PIN,OUTPUT);            // Set pinMode
}
void loop() {
  digitalWrite(PIN,HIGH);//Light up lamp 2s
  delay(2000);
  digitalWrite(PIN,LOW);//Turn off lamp 2s
  delay(2000);
}