Works with Home Assistant
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Sonoff S31

Category: Power

Updated Oct 24, 2025

Sonoff S31

Description

Highlights

  • Compact ESP8266 Wi-Fi smart plug (US NEMA 5-15) rated for 15 A with built-in energy monitoring.
  • Ships with eWeLink firmware but easily reflashed with Tasmota or ESPHome for local MQTT/REST control.
  • Physical on/off button and LED indicator; supports overload protection through firmware.

Great for DIYers who want affordable energy metering without relying on cloud services after reflashing.

Works with Home Assistant

Flash Tasmota or ESPHome and configure MQTT topics; original eWeLink cloud firmware is not directly supported.

Connection Path

Hubs

This device connects directly over Wi-Fi and does not require a hub.

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Gallery

Sonoff S31

Key resources

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