G36 2.4 Ghz : Extremely slow respond on Wi-Fi irrigation controller

Could you please confirm whether the slow speed issue is affecting all your devices or just the wireless irrigation controller?

Also, kindly confirm the internet speed plan you have subscribed to with your ISP.

1 gig speed plan from Cox.  Mainly the controller, which is about20 feet from the modem/router.

you can try changing the channel on the wireless. But irrigation controls don’t take much bandwidth. If its slow, it probably just the controller.