How to keep a pin "high" for a certain number of seconds

General
1

I am running a small 12V pump with a digital pin with a transistor and diodes. I need this pump to run for about 60 seconds. How can I format this in my code. This is what I have now and it comes on for about 3-4 seconds and then cuts off.

if (moisture < 2500) {
    digitalWrite(pump, HIGH);
    delay(1500);
    System.sleep(SLEEP_MODE_DEEP,30);
    }
else if (moisture >= 2500 ){
    System.sleep(SLEEP_MODE_DEEP,30);
   }
2

A simple way is to change delay(1500) to delay(60000) but that’s not a good way to introduce long delays.

This code snippet is a little too short. Are you controlling the pump elsewhere in code?

3

Depending on what you want the device to do, other than running the pump, making the change proposed by Kenneth would work. Alternatively, have a look into non-blocking delays or software timers :slight_smile:

1 Like
4

+1 For using non blocking delays and flags