Arduino sleep problems

Projects General Guidance
1

My arduino is having difficulty going to sleep.

I am using avr sleep

In my code it tells the cpu to go to sleep when it sees a HIGH on pin 11.

If i use SLEEP_MODE when it sees pin 11 go HIGH it turns on the led i have attached to pin 10 and it does not go to sleep.

If i use SLEEP_CPU instead of SLEEP_MODE the led doesn't turn on and the cpu will go to sleep sometimes.

But if i tell the led to turn on and then off as soon as it is told to go to sleep then the cpu goes to sleep every time.

2

You need to post your actual code. Use code tags around the code - the </> in the post edit controls.

3

This is the code that the cpu will go to sleep.

void sleepNow()
{

 digitalWrite(ledPin, LOW);
 delay(100);
 digitalWrite(ledPin, HIGH);
 delay(100);
 digitalWrite(ledPin, LOW);
 delay(100);
 digitalWrite(ledPin, HIGH);
 delay(100);
 digitalWrite(ledPin, LOW);
   
 set_sleep_mode(SLEEP_MODE_STANDBY);

 sleep_enable();

 attachInterrupt(0, wakeUpNow, LOW);

 // PROGRAM SLEEPS HERE

 sleep_cpu();

 // PROGRAM CONTINUES FROM HERE AFTER WAKING UP
 sleep_disable();

 detachInterrupt(0);
}

If i dont have the first section to turn the led on and off the cpu will sometimes go to sleep.

If i replace sleep_cpu with sleep_mode it turn the led attached to pin 6 on when told to go to sleep

4

Your code does not compile and lacks code tags.