SONOFF MINIR4 10A Smart WiFi Mini Relay - Compact Home Automation

In this review of the SONOFF MINIR4 the bottom line is simple: this tiny WiFi relay module is for DIYers who want to add smart control behind an existing switch or inside small European back boxes. The most compelling reason to buy is its compact size combined with flexible external switch support and eWeLink-Remote gateway capability, which lets it work locally with compatible remotes and standard voice assistants without a separate hub. It is a practical, low-profile way to add smart control to lighting and simple circuits.

Key Features

• WiFi connectivity: Works on standard WiFi so you can control lights and circuits without needing a separate hub.
• Super tiny size: The compact module fits into small mounting boxes, including the smallest European standard, enabling behind-switch installations.
• External switch control: Accepts momentary, SPDT, latching and dry contact sensors so it integrates with many existing wall switches and door-exit buttons.
• Detach relay mode: Separates the external switch state from the relay so pressing the physical button will not necessarily change the relay state, useful for advanced control setups.
• eWeLink-Remote gateway: Can pair with R5 and S-MATE remotes to allow local control via eWeLink-Remote signals even if the cloud is unavailable.
• Safety certifications: TUV, CE and FCC certifications indicate the device meets common international safety and reliability standards.

Who It's For

The MINIR4 is aimed at homeowners and electricians who want a discreet smart switch module to tuck behind existing plates or inside small junction boxes, and who prefer WiFi-based solutions with voice assistant compatibility. It suits users who want flexible integration with physical switches and local remote controllers for rooms, corridors, or simple lighting circuits.

This is not the right choice for someone who requires Zigbee mesh networking or multi-channel professional lighting controls; also installers needing heavy-duty relays for high current loads should look at higher amperage modules.

Pros & Cons

Pros

• Very small footprint makes it easy to install behind existing switches and in tight boxes.
• Supports a wide range of external switch types for flexible wiring and retrofit projects.
• Works with Alexa and Google Home via eWeLink and can act as a local gateway for compatible remotes.
• Certified by TUV, CE and FCC for added safety reassurance.

Cons

• It is WiFi-only, so users who need Zigbee compatibility or mesh networking must choose a different product.
• 10A relay limits use to lighting and low-power circuits rather than heavy loads.

Specifications

Brand	SONOFF
Model type	MINIR4 WiFi smart relay module
Relay current	10A
Connectivity	WiFi (no Zigbee)
Switch compatibility	Momentary, SPDT, latching, dry contact sensors
Special modes	Detach relay mode
Certifications	TUV, CE, FCC

Our Verdict

The SONOFF MINIR4 is a compact, capable WiFi relay that delivers excellent value for DIY smart home retrofits where space is tight and local remote control is desired. Its flexibility with switch types and eWeLink-Remote support makes it a smart choice for homeowners wanting reliable, behind-switch automation for lighting and low-power circuits.

Frequently Asked Questions

Does this module need a hub?
No, the MINIR4 connects directly to WiFi and does not require a separate hub to function.

Can I use my existing wall switch?
Yes, it supports momentary, SPDT, latching switches and dry contact sensors so it integrates with most existing switches.

Will it work with voice assistants?
Yes, it is compatible with Alexa and Google Home via the eWeLink integration.