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SmartWise 5V-32V 4-gang smart relay switch, with dry contact and momentary switch, eWeLink / Sonoff compatible, Wi-Fi + RF (R2)

SmartWise (Sonoff compatible) is the 4-channel version of 5-32V power supplied WiFi-equipped relay product-line, supports momentary and normal switch, or voltage-free dry contact switch, comes without plastic boxing. Supports interlock mode, capable of controling rotary engines.

The new R2 product version can now be controlled by Sonoff RF remote controllers and SmartWise RF wall swicthes, too.


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Supported protocols:
RF receiver (433 MHz), Wi-Fi
in stock (50+ pcs)

SmartWise is a 4 channel smart relay-switch, ideal solution for remote control of motorized gates, garage doors, or other electric devices/circuits. This smart device is compatible with the eWeLink smartphone app managing other Sonoff products. By using the WiFi-equipped smart relay you can close or break any circuits, and turn ON / OFF any devices connected to the relay.

This is the new December 2020 product version, featuring not just WiFi but RF receiver chips, so the smart relay can also be controlled by RF remote controllers and RF wall switches.

The new R2 version is now compatible with all Sonoff RF remote controllers and SmartWise RF wall switches, and all channels can be paired individually with the remote controller buttons.

The WiFi smart relay needs a 5V USB or 7V-32V DC power supply. Any connected circuits operate independently from the relay's power supply, the relay supports 90-250V/10A alternate current connected to COM input or manages 0-30V/10A direct current in NO or NC mode. The smart device manages volt-free dry-contact switching too.

The smart relay is remotely controllable via Internet and iOS (Apple) or Android smartphone App, and you can set scheduled turning ON / OFF. Share remote control in the App with your family.

Supports momentary switch mode, closes or breaks the connected circuits after 1 sec. Ideal solution for remote control of electric gates or PC power adapters. 

2 and 4 channel versions are also ideal for 2-direction engine-control because the relay supports "interlock" mode, where switching one of the circuits turns the other circuits automatically off. 

Product features:

  • Remote ON / OFF – Anytime, anywhere, from now on you can turn all your appliances on and off remotely.
  • Relay power supply: 5V DC USB or 7V-32V DC
  • No of circuits controlled: 4
  • Switched gangs: voltage-free dry contact or 90-250V/10A AC or 0-30V/10A DC
  • Mobil App – free iOS és Android mobil App: eWeLink
  • RF remote - compatible with 433 MHz Sonoff and SmartWise RF remote controllers and RF wall switches (rolling/jump code remotes not supported)
  • Sync status – Check actual relay status (turned ON or OFF) with the mobile App
  • Timer – Various timer functions: single time, scheduled turn on/off, countdown/timer, loop.
  • Share control – Control the device together with your family
  • Scene – Turn ON / OFF a gang of devices with one tap
  • Smart scene – Triggered ON/OFF by temp, hum or other environmental sensors
  • Compatibility - Works perfectly with Amazon Alexa, Google Assistant, IFTTT and Google Nest



The relay supports three modes: normal (self-toggle) switch mode, momentary switch mode and interlock mode. Choose between any with the button on main panel.

Supports two types of connection: with COM+NO type the relay closes the circuit when switched, with COM+NC type the relay breaks the circuit when switched.


Product type:
smart WiFi + RF relay, even for dry contact
without outer protective cover
Device power supply:
5V microUSB, 7-32V AC, 7-32V DC
5V microUSB power supply (not included), or 7V-32V DC/AC
DIN rail compatible:
Embedded relay:
Dimmer feature:
Power consumption metering:
Number of gangs / circuits:
Dry contact (voltage free) switching:
NO/NC switch:
Rated voltage (output):
dry contact, max. 250V AC, max 30V DC
Rated current (output):
10A per circuit
Number of phases:
Physical on/off button on device:
External switch supported:
2-way or 3-way switching:
only wireless RF433MHz switches can be paired to switch it
Momentary switching (inching):
yes, by default t operates in momentary switch mode
Interlock mode:
Surge protection:
Overheat protection:
Wi-Fi standards:
802.11 b/g/n (2.4GHz)
RF transmitter / receiver:
yes, (RF receiver)
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:
yes, default mode is to connect to the eWeLink cloud
LAN mode:
yes, if the connection with the eWeLink cloud is disconnected, limited features
REST API support:
MQTT support:
Supported integrations:
Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT (IFTTT integration with subscription, Premium feature)
Schedulers, timers:
yes, 8 timings on the device in offline mode, 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
100 g/pcs
Package offers
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SmartWise 5V-32V 4-gang smart relay switch, with dry contact and momentary switch, eWeLink / Sonoff compatible, Wi-Fi + RF (R2)
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