Sonoff | Smart Plug-in Unit
Description
Sonoff S31 is a Wi-Fi smart plug for controlling appliances without rewiring. It uses the eWeLink app and can be reflashed for local control with ESPHome or Tasmota.
Overview
My Implementation
Not currently deployed; evaluating fit for this setup.
Device Score Summary
Category Score Rationale
Features ★★★☆☆ Core capabilities documented; model-specific depth varies. Interoperability ★★★☆☆ Integration available via documented methods. Setup Ease ★★★☆☆ Typical setup for this device category. Cloud Dependency ★★★☆☆ Depends on integration and firmware options. Vendor Trust ★★★☆☆ Based on available documentation and product lineage. Overall ★★★☆☆ Solid option when matched to the right use case.
★★★★★ Exceptional | ★★★★☆ Very Good | ★★★☆☆ Good Enough | ★★☆☆☆ Frustrating | ★☆☆☆☆ Avoid
Features
Wi-Fi smart plug for on/off control 2.4 GHz Wi-Fi connectivity eWeLink app support Custom firmware support Energy monitoring on some variants
Specifications
Protocol Wi-Fi 2.4 GHz Hub Required No Power AC outlet Cloud Dependency Cloud by default; local when reflashed HA Integration Sonoff (eWeLink) or ESPHome/Tasmota Voice Control Alexa/Google via eWeLink Dimensions Plug-in module Warranty See Sonoff
Home Assistant Integration
Integration Method: Sonoff (eWeLink) integration or ESPHome
Requirements: eWeLink account for cloud; USB adapter for flashingEntities: Switch entity (and power sensors if supported)Setup: Add Sonoff integration or adopt via ESPHomeNotes: Check variant for energy monitoring
Practical Considerations
Choose the correct amperage rating Use local firmware for fast automations Avoid using for high inrush loads
References
Comparison And Shopping Sonoff | Smart Plug-in Unit Alternatives compares this device to the top three live alternatives and records the latest Amazon and Alibaba checks captured during the comparison run.
