Works with Home Assistant
Itead
Sonoff S31
Category: Power
Updated Oct 24, 2025

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
- Logitech Harmony HubProtocol: wifi, infrared, bluetooth
- Xiaomi Mi Smart Home Gateway (Mi Control Hub)Protocol: zigbee, wifi
- Vera VeraPlus Home ControllerProtocol: z-wave, zigbee, bluetooth, wifi
- Wink Wink Hub (1st Gen)Protocol: z-wave, zigbee, bluetooth, lutron-clear-connect, wifi
- Wink Wink Hub 2Protocol: z-wave, zigbee, bluetooth, lutron-clear-connect, kidde, wifi
- Wink Wink RelayProtocol: zigbee, wifi, bluetooth
Shop now
Gallery
