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Extreme Switch Mate / SMate
Extreme Switch Mate / SMate
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✅ Overview: Sonoff S-MATE (Switch Mate)
The Sonoff S-MATE (also in versions like S-MATE Extreme / S-MATE2) is a battery-powered switch module that lets you integrate ordinary wall switches (rocker or pulse switches) into your Sonoff smart home setup. It's especially useful where there is no neutral wire available in the wall box.
🔧 Key Specs & Features
| Feature | Detail |
|---|---|
| Power / Battery | Powered by CR2477 battery (3 V) |
| Supported Switch Type | Rocker switch or momentary / pulse switch (configurable via DIP switch) |
| Channels | Up to 3 channels (3 switches) supported |
| Communication | Works as eWeLink Remote (Bluetooth / remote protocol) subdevice; needs a gateway (like MINIR4 or another Sonoff device that supports Remote Gateway) |
| Range | ~50 meters line of sight for eWeLink Remote communication |
| Size / Form | Compact to fit behind wall switches; dimensions ~40.3 × 37.4 × 18.3 mm |
| Operating Temperature | -10 °C to 40 °C |
| Certifications | CE / FCC / RoHS |
🛠 How It Works / Usage
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Install the S-MATE behind your existing wall switch. It wires in such a way that the external switch becomes a remote input to the smart system.
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It communicates wirelessly (via eWeLink Remote protocol) to a gateway device, which then controls your smart devices.
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No neutral wire required — that's one of its main advantages in retrofit situations.
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DIP switches inside allow toggling between rocker or momentary mode, so it adapts to different switch types.
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You can use it to trigger smart scenes / control devices in eWeLink based on your wall switch presses.
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