Sleep_ProMini.ino

// **** INCLUDES *****

#include "LowPower.h"

void setup()

{

 DDRD &= B00000011;       // set Arduino pins 2 to 7 as inputs, leaves 0 & 1 (RX & TX) as is

 DDRB = B00000000;        // set pins 8 to 13 as inputs

 PORTD |= B11111100;      // enable pullups on pins 2 to 7

 PORTB |= B11111111;      // enable pullups on pins 8 to 13

 pinMode(13,OUTPUT);

 digitalWrite(13, LOW);

}

int delay13H = 300;

int delay13L = 500;

void loop() 

{

// Enter power down state for 8 s with ADC and BOD module disabled

 LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);  

 digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)

 delay(delay13H);              // wait for a second

 digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW

}