Works with Home Assistant
Itead

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.

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

Connection Path

Hubs

Via supported protocols

Protocol: wifi

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Gallery

Sonoff S31

Key resources

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