Hi! We are building a hydroponic system which has two pumps and are controlled by a 2 way relay module. We plan to control the relay using DS3231 RTC module and turn it on and off for 30 secs. We are having trouble with the codes. I hope you can help us
See Arduino - Relay tutorial
Hi,
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
OR
http://forum.arduino.cc/index.php/topic,148850.0.html.
Then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
What model Arduino are you using?
Thanks.. Tom... 