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SONOFF MINI Extreme (Sonoff MINIR4) Wi-Fi smart switch (relay module)

Sonoff"s tiny little Sonoff Mini Extreme (MINIR4) module is one of the smallest Wi-Fi relays on the market, so it will fit into even the smallest wall box.

It may be connected to eWeLink Cloud or to Sonoff iHost hub locally through Wi-Fi protocol, but it also supports eWeLink-Remote (Bluetooth) protocol for local remote control, just as Mini R3 version.

Also, just as Mini R2 version, it has switch input for a wired wall switch, so it's a perfect product to add smart control for a wired switch, and also to add support for additional wireless switches. 

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Factory SKU ID:
Supported protocols:
eWeLink-Remote (hub), Wi-Fi
in stock (50+ pcs)

Sonoff's new MINIR4 is an extreme mini WiFi smart switch equipped with ESP32 chip, that turns traditional switches into smart switches. You may use it to remote control and automate lights and electronic devices, and thanks to its tiny size (only 33 x 40 mm), it fits in various mounting boxes, including the smallest EU-type/86 type/120 type mounting boxes.

Sonoff MINI R4, also called as Sonoff Mini Extreme, supports external switch control and easily connects to the momentary switch, door exit switch, SPDT switch, latching switch, and even dry contact sensors, just as previous version Sonoff Mini R2.

As a new feature, MINI R4 also has "detach relay" mode, which means the states of external switches and relay are separated, so operating the external switch button won't affect the relay state. Even then, you may use the external switch to trigger a smart scene and operate another device, group of devices or automation. 

As Mini R4 has embedded ESP32 chip, the device comes with support for Bluetooth. The pairing of the device to eWeLink is also processed by Bluetooth-based pairing with the phone, and MINIR4 also features a gateway / hub function of “eWeLink-Remote“, a Sonoff proprietary Bluetooth protocol for local remote control. Sonoff offers R5 wireless switch and S-MATE module (to be installed into a wall box behind a traditional switch) as separately sold products, which can control MINI R4 locally through "eWeLink-Remote" signal, or even can trigger other smart devices with a smart scene.

Just as all other eWeLink relay modules, it supports scedules ON/OFF, power-on-state (ON / OFF / LAST STATUS), smart scenes (automations) and inching (AUTO OFF and AUTO ON) features. Also, to protect the electric network from overload, a power-on delay can be set for after power outage for devices.  

The new Sonoff Mini Extreme R4 module is 40% smaller than MINI R2 and 60% smaller than Mini R3 product version.

Sonoff R4 Extreme supports voice control from Google Assistant (Google Home) and Amazon Alexa voice assistants. 

Sonoff R4 Wi-Fi relay is compatible with Home Assistant, eWeLink Web UI (needs eWeLink Advanced subscription) and IFTTT (needs eWeLink Advanced subscription).

Product features: 

【Super Tiny Size】Its compact size allows it to be installed in various mounting boxes, including the smallest European standard.
【External Switch Control】Easily connect to the momentary switch, door exit switch, SPDT switch, latching switch, and even dry contact sensors.
【Detach Relay Mode】MINIR4 has “detach relay” mode, which means the states of external switches and relay are separated, so operating the external switch button won’t affect the relay state.
【eWeLink-Remote Control】MINIR4 is a smart switch with the gateway function of “eWeLink-Remote”. You can add “eWeLink-Remote” sub-devices, R5 and S-MATE, after pairing with MINIR4, both R5 and S-MATE can act as remote controllers to control MINIR4 locally through the eWeLink-Remote signal.
【Safe & Reliable】TÜV, CE, and FCC certifications ensure a safer and more reliable product.

Compatible with:

  • Sonoff R5 wireless eWeLink-Remote (Bluetooth) switch, white and dim grey types and
  • Sonoff S-Mate wireless eWeLink-Remote (Bluetooth) module 

Product type:
smart WiFi relay with eWeLink-Remote (Bluetooth) receiver and hub feature
Device power supply:
100V-240V AC
230V AC (live and neutral)
DIN rail compatible:
Operating temperature range:
-10℃ – 40℃
Operating humidity range:
5% - 95% RH
Embedded relay:
Dimmer feature:
Power consumption metering:
Number of gangs / circuits:
Rated voltage (output):
100V-240V AC
Rated current (output):
2400W (10A)
Physical on/off button on device:
External switch supported:
supports door switch, rocker switch, momentary switch and SPDT switch as external switch AND also supports wireless connection of wall switches via S-MATE companion products
2-way or 3-way switching:
yes, 2-way support can work with rocker and momentary swicthes and SPDT switches (note: dry contact switchingneeded on SW input), also, wireless eWeLink-Remote switches can be paired
Momentary switching (inching):
Overheat protection:
Wi-Fi standards:
802.11 b/g/n (2.4GHz)
RF transmitter / receiver:
Bluetooth pairing with phone, built-in eWeLink-Remote (Bluetooth) gateway
Controllable from internet:
Manufacturer smartphone app:
yes, free app: eWeLink (Android, iOS)
Voice control:
Amazon Alexa and Google Assistant compatible
Cloud mode:
default mode is connecting 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), 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
50 g/pcs
Package offers
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