DieseRC 2-Channel WiFi Relay — eWeLink App, No Arduino Needed

What is it and what's it for?

Unlike the relays in this ranking (which are bare parts meant to connect to an Arduino and program yourself), this one has built-in WiFi — you connect it to your network with the eWeLink app and can immediately turn each channel on and off from your phone, without writing a single line of code.

Real-world use cases

• At home: You have a single irrigation valve you currently open and close by hand, and want to control it over WiFi without building an electronics project — this relay does that job directly, no Arduino involved.
• In a business or workshop: A gardener with just a few clients can add remote control to individual valves at different properties without programming a microcontroller for each one.

How to avoid buying the wrong one

• Unlike the relays in this ranking, it doesn't need an Arduino or programming — it's controlled directly from the eWeLink app as soon as you connect it to WiFi.
• It has 2 channels — you can control two independent valves or loads with a single module.
• It's compatible with Alexa and Google Home, something the DIY relays in this ranking don't offer on their own.