Product Details

🏭 Manufacturer: Sonoff

🔌 Plug Format: AC Power

📄 Specification Met: FCC, CE, RoHS

🔖 Part Number: IM190409002

🏋️‍♂️ Weight: 67 g

📏 Dimensions: 50 mm x 30 mm x 40 mm

🏳️ Country of Origin: China

🆔 Model Number: S31

📐 Size: Small Form Factor

🎨 Style: Compact Design

🧲 Mounting Type: Plug-In

🔧 Usage: Indoor Use

🧩 Included Components: 1x Sonoff S31 Smart Plug, User Manual

Product Overview

The Sonoff S31 Smart Plug is a small, compact device that lets you take control of your home appliances and monitor your energy usage. Designed with efficiency, it is ideal for those who want to minimize power consumption while maintaining convenience. This smart plug works seamlessly with Alexa and Google Assistant, enabling voice control for effortless operation. Whether you want to track energy use, turn devices on or off remotely, or schedule operations, the S31 has you covered.

This energy-monitoring smart plug is built into a sleek design to fit comfortably into most outlets without blocking other sockets. It's perfect for homes with multiple devices, allowing you to control and monitor them individually. If you're problem-solving how to cut down on electricity bills, this smart plug might be your ideal start!

Key Features and Benefits

The Sonoff S31 Smart Plug offers a variety of features to make your life easier, safer, and more efficient:

  • Energy Monitoring: Keep track of your appliances' electricity usage in real time via the eWeLink app.
  • Voice Control: Hands-free convenience with Alexa and Google Assistant support.
  • Scheduling Capabilities: Set specific times to turn devices on and off, helping reduce energy waste.
  • Compact Design: The sleek profile ensures it won't crowd adjacent outlets.
  • Remote Access: Control your devices from anywhere using the robust eWeLink app.

With these capabilities, the S31 goes beyond just a power switch; it transforms your routine into a seamlessly smart home experience.

Detailed Specifications

Here are the key technical specifications of the Sonoff S31 Smart Plug:

  • Dimensions: 50 mm x 30 mm x 40 mm
  • Maximum Load: 15 A / 1800 W
  • Power Consumption Tracking: Real-time monitoring
  • Wireless Protocol: 2.4 GHz Wi-Fi (IEEE 802.11 b/g/n)
  • Integration Options: Works with Alexa, Google Assistant, IFTTT
  • Mobile App: eWeLink (iOS and Android compatible)
  • Certifications: FCC, CE, RoHS compliance

The plug is compatible with most home appliances, including lights, coffee makers, heaters, and more, making it suitable for nearly any setting.

Connectivity and Integration

One of the standout features of the Sonoff S31 is its smooth connectivity. It works on a 2.4 GHz Wi-Fi network, ensuring a reliable connection without requiring additional hubs or bridges. Integration with voice assistants like Alexa and Google Assistant means you can control your appliances with spoken commands, eliminating the need for manual operation.

The plug also supports IFTTT, which allows you to create custom automation between multiple devices. Whether automating your morning routine or ensuring devices are turned off when you leave, the Sonoff S31 Smart Plug fits seamlessly into your smart home ecosystem.

How to Use in Your Daily Life

Real-World Applications

The Sonoff S31 is designed for versatility, and these practical use cases highlight its benefits:

  • Save Energy: Use the energy monitoring feature to identify high-consumption devices and optimize their usage patterns.
  • Effortless Morning Routine: Schedule your coffee maker to turn on before you wake up.
  • Enhanced Safety: Remotely switch off devices like space heaters or curling irons when you're out of the house.
  • Holiday Lighting: Automate decorative lights to turn on and off at specific times during the season.
  • Eco-Friendly Living: Track and fine-tune your appliances' energy consumption to reduce your carbon footprint.

This device can help you manage devices more intelligently while ensuring convenience and safety.

Setting Up the Sonoff S31 Smart Plug

Getting started with the Sonoff S31 Smart Plug is simple:

  1. Plug It In: Insert the S31 into any standard outlet in your home.
  2. Download the eWeLink App: Available on both Android and iOS platforms.
  3. Connect to Wi-Fi: Make sure your phone and the device share the same 2.4 GHz Wi-Fi network during setup.
  4. Pair the Plug: Follow the guided steps in the app to connect the smart plug.
  5. Start Using Features: Use the app to schedule appliances, turn devices on or off, or monitor energy usage.

The setup process typically takes less than 10 minutes and doesn't require advanced technical skills.

Troubleshooting Tips

  • Ensure your Wi-Fi network operates at 2.4 GHz, as the device does not support 5 GHz bands.
  • Reboot the plug and app if issues arise during pairing.
  • If Alexa or Google Assistant fails to recognize the device, verify the linked app accounts are synced properly.

Pros and Cons

Pros:

  • Real-time energy usage tracking
  • Supports voice control for enhanced convenience
  • Compact, space-saving design
  • Affordable price point
  • Easy setup with intuitive app controls

Cons:

  • Only supports 2.4 GHz Wi-Fi networks
  • Doesn't include advanced surge protection
  • Limited to indoor use only

Final Thoughts on the Sonoff S31 Smart Plug

The Sonoff S31 Smart Plug is a fantastic addition to any smart home, particularly for those seeking to reduce energy consumption and enhance daily convenience. Its energy monitoring, compact size, and compatibility with Alexa and Google Assistant make it a standout choice for users. While it has minor limitations, like operating only on a 2.4 GHz Wi-Fi network, its affordability and robust features easily outweigh any drawbacks.

If you're looking for an easy way to control devices remotely and learn more about your energy habits, the Sonoff S31 is an excellent pick. It's simple to use, offers reliable performance, and integrates well with other smart devices. Whether you're a smart home beginner or a seasoned pro, the Sonoff S31 adds value and efficiency to your daily life.


By incorporating this smart plug into your living space, you're not only upgrading your home but also contributing to a more energy-conscious lifestyle. Ready to take the next step? Explore the Sonoff S31 Smart Plug today!

Frequently Asked Questions

Does the Sonoff S31 work with Apple HomeKit?

No, the Sonoff S31 does not directly support Apple HomeKit. However, you can integrate it with HomeKit indirectly through third-party services like Home Assistant or by using Sonoff's eWeLink app with IFTTT automation. For native HomeKit support, consider Sonoff's Matter-compatible products.

What is the maximum power load the Sonoff S31 can handle?

The Sonoff S31 can handle a maximum load of 15 Amperes at 250V AC, which translates to approximately 1800 watts. This makes it suitable for most household appliances like coffee makers, space heaters, and fans. Do not exceed this limit as it may damage the device.

Does the Sonoff S31 require a hub or bridge to operate?

No, the Sonoff S31 does not require a hub or bridge. It connects directly to your 2.4 GHz Wi-Fi network for operation. Make sure your router supports 2.4 GHz bands, as the device does not work with 5 GHz Wi-Fi networks.

How accurate is the energy monitoring feature on the S31?

The energy monitoring on the S31 provides real-time power consumption data with reasonable accuracy for household use. The precision is typically within 5-10% of actual consumption. For precise measurements in critical applications, consider using a dedicated power meter alongside the S31.

Can I use the Sonoff S31 outdoors or in humid environments?

No, the Sonoff S31 is designed exclusively for indoor use in dry environments. Using it outdoors or in damp areas like bathrooms near shower areas may cause damage due to moisture. Always keep the device in a well-ventilated indoor location.

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