blinky-4m.sketch

// Change these to match one's setup

// - Arduino Pins to trigger for relays
#define RELAYPIN1 4
#define RELAYPIN2 5
#define RELAYPIN3 6
#define RELAYPIN4 7

// - 10 minutes in milliseconds
#define SLEEPDELAY 600000

// - 12 hours in milliseconds
#define PAUSEOFF 43200000

// <- this is a comment. Uncomment by removing the first two '//'
// Comment by adding '//' in front of the line.
// To switch between active low or active high. uncomment one set
// and comment the other.

// - Active high relays
#define TURNON HIGH
#define TURNOFF LOW

// - Active low relays
// #define TURNON LOW
// #define TURNOFF HIGH

void setup() {

  pinMode(RELAYPIN1, OUTPUT);
  pinMode(RELAYPIN2, OUTPUT);
  pinMode(RELAYPIN3, OUTPUT);
  pinMode(RELAYPIN4, OUTPUT);
}

void loop() {

  digitalWrite(RELAYPIN1, TURNON);
  digitalWrite(RELAYPIN2, TURNON);
  digitalWrite(RELAYPIN3, TURNON);
  digitalWrite(RELAYPIN4, TURNON);

  delay(SLEEPDELAY);

  digitalWrite(RELAYPIN1, TURNOFF);
  digitalWrite(RELAYPIN2, TURNOFF);
  digitalWrite(RELAYPIN3, TURNOFF);
  digitalWrite(RELAYPIN4, TURNOFF);
  
  delay(PAUSEOFF); // 12 hours
}