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【Open Device REST API】Connect and control the BASICR3 with your existing home automation system like Home Assistant via LAN.
【Easily DIY Your Smart Home Appliances】Connect BASICR3 directly to the middle of the power supply and the appliance to quickly make your ordinary appliances smart without buying a new smart one.
【Fully Functional】BASICR3 has all the most basic functions, like remote APP control, LAN control, timing schedule, share control, etc. Your best choice for the DIY switch.
【Smart Scenes】Trigger other smart devices, make actions auto-on/-off. The appliances understand you, and your life becomes simpler.
【Voice Control】Compatible with Amazon Alexa, Google Assistant, SmartThings, and Alice. Just speak out your command, the smart device can do on/off as you say.

If you want to buy a switch with DIY Mode, you can click to buy RFR3, D1, MINIR2. If you don’t need DIY Mode, you can click to buy BASICR2.

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This is a WiFi Smart Switch with the DIY capability that makes it possible to control connected devices via the eWeLink directly from your phone, or ask it to turn on/off devices with Amazon Alexa and Google Assistant. Amazingly, it has a DIY mode that is the firmware can be user-defined. Built-in a web server that exposes the REST API, which allows you to connect the switch with your existing home automation system. Compatible with HomeSeer, Home Assistant, etc, for the protocol document and the code for the DIY Mode tool (updating), please go to Github on

Simply set a timer to let your devices switch on/off automatically at a pre-set time through a day. For example, prepare your coffee maker in the evening, and a cup of coffee is ready for you in the next morning. Compatible with the IFTTT function, and you can make more actions happen to trigger other devices, or receive a notification on your phone once the action was triggered.

Along with support for smart scenes, just set a device to turn on/off to make another or a boatload of devices turn on/off. The LAN control is designed for situations which no available Wi-Fi connection, or an unsteady Wi-Fi network environment. A convenient option that is share control is capable of allowing you to manage the same device with your family or friends together, simply share it on the eWeLink app to try.

Note: SONOFF BASICR3 does NOT have 433Mhz RF receiver module. If you want a DIY smart switch with RF function, please buy SONOFF RFR3.


Additional information

Weight 64 g
Dimensions 94 × 45 × 30 mm

Product Type

Wi-Fi Smart Switch with DIY Mode

Max Current


Max Power


Power Supply

AC 100-240V

Switch Channel


Wireless Standard

IEEE 802.11 b/g/n 2.4GHz

Enclosure Material


DIY Mode


Works With

, , ,

Product Dimensions


Certified Compliance:


Customer Reviews

Based on 5 reviews
Robert Ford
Brilliant device to control zone valves in central heating.

I’ve used these sonoff basic device for several years flawlessly to control my heating zone valves. Saves wiring and the need for a programmer.
I wired my pump and boiler to the same sonoff basic device with two small radiators permanently in water circuit (bathroom and hall) to ensure an adequate flow in the event of a device malfunction.
In addition 3 zone valves control 2 heating zones and a hot water zone were enabled with their own dedicated sonoff basic.

I also control a number of house lights as well with inching enabled.

Very reliable devices. No no failures over several years ever!!!!!
Works seamlessly with Alexa too.

As a final thought one of the sonoff devices would make an excellent man down device if fitted to a buzzer or light.

Leonard Canarsky

Instructions for wiring the device is very small letters for this old guy. I went to wire it up but it has no instructions for my 2 wire system (old wiring) I got it to connect to wifi and the app but no way to get power to light. Will have to see if there is a work around.

Rian van der Colff

Would love to review your product but are still waiting for my order, your tracking system is a bit vague and hard to pinpoint where exactly my order is after 35 days

Finnur Gudmundsson
Easy setup, works as expected

Bought 8 of those switches to automate some of my lights - work great. Shipping to Iceland was very quick!

Anthony Kireluk
Pairing Switch

The black pairing button was broken on opening rendering the item useless.

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