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Sonoff Basic (R4) Wi-Fi + Bluetooth smart relay switch

Sonoff's entry-level relay module with WiFi and Bluetooth support, which can be controlled via the internet from a mobile phone and locally from eWeLink-Remote hub-type remote controls. Just as Basic R2, it supports max. output of 2200W (10A).

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Supported protocols:
eWeLink-Remote (hub), Wi-Fi
in stock (30+ pcs)

The Sonoff Basic R4 is a smart switch relay is the new version of Sonoff Basic R2, the entry-level member of Sonoff's internet-controllable relay switches. As a new feature, it is also compatible with Sonoff's eWeLink-Remote remote controllers (Sonoff S-MATE / S-MATE2 modules, R5 wireless switch).

It is a relay switch module with WiFi + Bluetooth support, requiring a 230V AC power supply and can be used to switch on/off electrical appliances. Using an App running on an Internet-connected iOS (Apple) or Android mobile phone, you can remotely control the switch and set a scheduled on/off.

Of course, there is also a physical push button switch on the relay. And the remote access option via the mobile app can be shared with family members. Perfect for smart control of household electrical devices that don't need to be on all the time, but need to be switched on/off intermittently (e.g. aquarium circulator or aerator). It can be used to conveniently turn on appliances remotely before you get home, and can also be used to conveniently time off to save energy and money.

Sonoff Basic R4 does not have an external thermometer/humidity sensor input, no wired sensor can be connected.
If you also need temperature range or humidity level control, choose Sonoff TH relay series instead. 

Product features:

Mobile App - Free iOS and Android mobile App: eWeLink
Status check - The mobile App shows the current status of the relay (on or off)
eWeLink-Remote (Bluetooth) compatible - it has a Bluetooth receiver and hub feature, so S-MATE / S-MATE R3 modules and R5 wireless switch has be used as a local remote controller
Remote on/off switching - wherever you are, you can remotely switch the relay (and devices connected to it) on or off from the mobile app via the web
Timing - Several timing functions are available: setting a specific time, setting recurring times, countdown timer/timer, cycle.
Timed shutdown - you can also set the socket to automatically shut down at a certain time after each power on
Pulse switching: the relay can also be set to pulse switch, i.e. to switch for a short period of time (e.g. typically 0.5 or 1 second)
Can be shared with others - Give access to remote control to e.g. family members or others
Groups, rooms - organise your Sonoff and SmartWise smart devices into groups and rooms in the eWeLink app
SmartControl (Scene) - The SmartControl / Scene eWeLink app feature also allows you to create conditional controls between different Sonoff / SmartWise devices. For example, you can switch a Sonoff S26 outlet based on temperature or humidity sensor data from a TH10 relay, or switch a Sonoff or SmartWise smart light switch based on RF motion sensor signal from a Sonoff RF Bridge gateway, or coordinate the on/off of two WiFi devices (e.g. a Sonoff light switch can switch a Sonoff WiFi smart connector via WiFi).
Compatibility - Can be connected to Amazon Alexa, Google Assistant, and Google Nest for voice control
Sonoff and its sister brand SmartWise devices are compatible with each other, both using the eWeLink factory app.

Product type:
smart WiFi relay
Device power supply:
100V-240V AC (max. 10A)
230V AC (live and neutral)
DIN rail compatible:
yes, together with Sonoff DR adapter (not included)
Power consumption metering:
Number of gangs / circuits:
Rated voltage (output):
100V-240V AC
Physical on/off button on device:
External switch supported:
Surge protection:
Overheat protection:
Controllable from internet:
Manufacturer smartphone app:
yes, free app: eWeLink (Android, iOS)
Web admin interface:
on/off mode (only with subscription, Premium feature)
Voice control:
Amazon Alexa and Google Assistant compatible
Cloud mode:
default mode is connecting to the eWeLink cloud
REST API support:
yes, instead of eWeLink app and cloud it can communicate through REST API
MQTT support:
Supported integrations:
Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT (IFTTT integration with subscription, Premium feature), REST API
Schedulers, timers:
yes, 8 timings on the device in offline mode, (loop control supported), any further timing can be run from the cloud in online mode
Notification functions:
eWeLink app notification on smartphone
yes: on/off history in the app
56 g/pcs
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