I currently have a WiFi water alarm triggering a Sonoff 4CH Pro R2 to kill my whole house humidifier. So I have some experience with triggering the relays and getting the two devices talking to each other via IFTTT.
Here is my question as I want to take things a step further. I want to be able to kill my AC and Whole House Humidifier when the condensate pump fails. I have a Sonoff 4CH Pro R2 and a Little Giant 554425 VCMA-20ULS with a safety switch. How to I go about sending a signal to the Sonoff when the condensate pump safety switch is triggered? Is there another WiFi device I need to purchase or is there a hardwire way? Any advice is greatly appreciated. Thanks.