OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Water pump is shared between pool and sprinklers – manual pool filling? › Reply To: Water pump is shared between pool and sprinklers – manual pool filling?
Well, it’s been more than a year since I bought my OSPI 1.4 and now it’s time to finally put it in production 🙂
The water pump is 1.5HP 220 VAC and it is currently manually controlled via a contactor that has a simple on-off switch. We use this pump only to fill the pool and the installation will be modified to share it with the sprinkler system.
I understand that I have to feed power to the contactor control pins to signal it to close the 220V feed and turn on the pump.
How would I do that with an OSPI? Can I use the onboard relay somehow or do I need to add an external relay circuit (cheap US$ 5) and use GPIO +5V to control the relay?
Could someone help?
Thanks in advance