Controlling a 220V pool pump with a Wi-Fi smart plug

Pump control cabinet with bypassed mechanical timer, and new contactor to its left. The contactor is being controlled by the Sonoff S31 smart plug in the outlet below.

Devices that require 220 volt split-phase circuits, like larger pumps and electric water heaters in North America, can be difficult to find “smart” switches for—especially when you’re looking for a non-cloud solution that respects your privacy. I wanted a Wi-Fi switch for my pool pump that I could control with my OpenHAB server. After a… Continue reading Controlling a 220V pool pump with a Wi-Fi smart plug