How to Set Up Your Sonoff S31 Smart Plug with Energy Monitor

What You'll Need

• Sonoff S31 Smart Plug with Energy Monitor
• eWeLink app (iOS or Android)
• eWeLink account
• 2.4GHz Wi-Fi network

Step-by-Step Setup

1. Download eWeLink app and create account
2. Plug in Sonoff S31
3. Enter pairing mode:
   • Press and hold button 5 seconds
   • LED blinks 3 times repeatedly
4. Add in eWeLink:
   • Tap "+" to add device
   • Select "Quick Pairing" mode
   • Enter Wi-Fi credentials
5. Wait for pairing and name device

Key Features

• Energy monitoring (voltage, current, power, kWh)
• 16A high-capacity relay
• Works with Alexa and Google Home
• eWeLink scenes and automations
• Compact design
• Status LED
• Can flash with Tasmota for local control

Troubleshooting

• Touch pairing mode: Press 3x for "Compatible Pairing" (AP mode)
• 5GHz not supported: Must use 2.4GHz
• Energy not showing: Wait a few minutes after connecting load
• Factory reset: Hold button 10+ seconds until LED flashes rapidly