Tessan WiFi Dimmer Switch MJ-SD02 Introduction

The Dimmer Switch is a smart home device designed to enhance your lighting control with convenience and efficiency. This dimmer switch allows users to adjust brightness levels remotely via a smartphone app or through voice commands using smart assistants like Alexa and Google Assistant. Its sleek design fits standard wall plates, making installation simple and unobtrusive. Ideal for creating the perfect ambiance in any room, the exact cost of the MJ-SD02 is $29.99.

General Specification

Main Features

• Works with Alexa & Google Assistant for voice control
• ONLY compatible with 2.4G Wi-Fi, DO NOT use it under 5GHz
• FREE iOS and Android Apps are available to control it anywhere
• Schedule and time it to automatically turn on/off
• Manually turn on/off the switch by the Main Button
• Dimmer: LED, CFL, halogen and incandescent Bulbs

Description

The Tessan WiFi Dimmer Switch MJ-SD02 boasts a sleek and modern design that fits seamlessly into any home decor. Its intuitive interface allows for easy manual control, while the associated app offers advanced features such as energy monitoring and scheduling. This switch supports up to 400W of total load, making it suitable for a variety of lighting setups. The device is also designed with safety in mind, featuring overheat protection and automatic shut-off in case of an emergency.

Installation and Wire Connection

Notice

1. As the switch needs power for itself, three lines must be connected (Live Line, Load Line and Neutral Line);
2. Please use the wire nuts to make the copper conductors fully concealed;
3. If you really cannot find out a Neutral Line in your Power line Socket, STOP installing the switch and consult with a professional electrician or contact our service team.

Step 1: Turn off power at the circuit breaker that controls the light switch. Use voltage tester to confirm no voltage is present. 
Step 2: Remove existing faceplate and light switch, then identify Live/Load, Neutral and Ground lines. 
Step 3: Connect the Smart Switch wiring with the provided wire connectors as follows: 

• Brown wire on switch (Load Line) to Load Line, like a bulb
• Black wire on switch (Live Line) to Live Line
• White wire on switch (Neutral Line) to Neutral line
• Green wire on switch (Ground Line) to Ground line

Please wrap electrical tape around the wire nuts to make sure the copper conductor is fully concealed.

Connect the WiFi Dimmer Switch to Wi-Fi

1. Step 1: Download the App 
   Scan the QR code or search “Smart life” in the App Store or Google Play

   

2. Step 2: Register a New Account

   

3. Step 3: Turn on the power at the circuit breaker and press the main button and hold it for 5 seconds, then the Wi-Fi Indicator light flashes quickly in Red. 
   Flash Quickly in Red: Paring Mode 
   Constant Blue: Power ON 
   Constant Red: Lost Wi-Fi Connection 
   No Light: Power OFF, Wi-Fi Connected

4. Step 4: Tap + to Add a device in your App (Smartphone should connect to 2.4GHz Wi-Fi).

   

5. Step 5: click “All devices”, then select “Wall Switch”

   

6. Step 6: Confirm the indicator blinks quickly.

   

7. Step 7: Enter the Wi-Fi Password (Your phone should have connected to the same Wi-Fi first)

   

8. Step 8: It will be 100% in around 20 seconds. 
   If it fails, 
   1. reconnect
   2. wait it goes to around 10%,
   3. Press and hold the main button for 5 seconds, it will blink again. Then release it, the switch will be connected.

   4. If the problem continues, repeat step 3 to step 7 and contact the seller for help.

      

9. Step 9: Edit the name of your smart switch

   

10. Step 10: Delete the default name and input a new one(Simple Names will be identified easily by Echo or Google Home）

    

11. Step 11: Tap Done

    

12. Step 12: The switch is connected and you can control it by this App. If you need voice control, please refer to Part 3 for Alexa, Part 4 for Google Assistant.

Now you can turn on/off the smart dimmer switch via App on your smartphone.

Setup Guide

To set up the Tessan WiFi Dimmer Switch MJ-SD02, 

1. Start by flipping the circuit breaker to turn off the electricity to your lights.
2. Following the instructions supplied, remove the existing switch and connect the wires to the MJ-SD02.
3. After connecting, restart the power and download the Tessan app.
4. To link the switch to your WiFi network, follow the directions provided in the app.
5. Using the app, set up any necessary settings, including voice assistant integrations and schedules.

Connect the Dimmer Switch to Alexa

Part 2 must be completed before doing this part 3

1. Step 1: Log in your Alexa account on a smartphone or a computer, then tap Home Skills

2. Step 2: Search “Smart Life” and select the right one according the blue logo (same with App)

   

3. Step 3: Enable the skill

4. Step 4: Login the account you registered on the App in Part 2, then click “Link Now”

   

5. Step 5: The Account is linked successfully, and then tap Authorize to Complete.

   

6. Step 6: Congratulations! Alexa Devices (Echo) can control the Switch ON/OFF. 
    
   • To add or delete switches, please delete or add them in the Smart Life App (see Part 2), and then the Alexa will synchronize automatically. 
   • If you cannot see the name of switches in the Devices List in Alexa Page, you can click “Discover” in Alexa Page, it will synchronize from the Smart Life App. 

Connect the Dimmer Switch to Google Home

Part 2 must be completed before doing this part 4

1. Step 1: Find "Home Control" in the hamburger menu on the Google Home app’s home page ->Home Control -> tap "+".

   

2. Step 2: Find "Smart Life" in the list.

3. Step 3: Input your Smart Life account and password you registered in Part 2, then tap "Link Now".

   

4. Step 4: After you assign rooms for the switch, your switch will be listed in the Home Control page.

   

5. Step 5: Control your smart switch through Google Home 
   Now you can control your smart switch through Google Home. If you set the name as “bedroom light”, the supported voice commands are as below: 
   Ok Google, turn on bedroom light. 
   Ok Google, set bedroom light to 50%.

Warning: 

• Please install it by a professional electrician
• If there is radio frequency interference, it might affect the operation
• Indoor use only
• Do not use in bathroom and other damp locations
• Please ensure that the light bulb is within the capacity of this switch. 
  • INC 400W
  • LED 150W
  • CFL 150W
• Please keep the device out of the reach of children to avoid danger. 

Troubleshooting

Cannot download the right App. 
Please come back to step 1 and download by scanning the QR code. Please use a smartphone rather than tablet. 

No light comes out from the indicator button 
Please check the wire connection and press the reset button if necessary, then the Wi-Fi Indicator will blink quickly. 

Cannot discover the smart switch by App.
Make sure that your Wi-Fi router is 2.4GHz; DHPC is enabled in the Wi-Fi router, the phone connects to the same Wi-Fi; the Wi-Fi indicator flashes quickly 

Tessan WiFi Dimmer Switch MJ-SD02 Pros & Cons

Pros

• Convenient Remote Control: Manage lights from anywhere using your smartphone or voice assistants.
• Energy Efficiency: Monitor and control energy consumption in real-time.
• Easy Installation: Compact design fits standard wall plates, making installation straightforward.
• Compatibility: Works with a variety of bulb types including LED, incandescent, and halogen.

Cons

• Intermittent Connectivity Issues: May experience occasional drops in WiFi connection.
• App Performance: Some users report occasional lag or bugs in the app.
• Compatibility Limitations: Not compatible with all smart home systems or bulbs.

Customer Reviews

Customers praise the Tessan WiFi Dimmer Switch MJ-SD02 for its ease of installation and seamless integration with smart home systems. However, some users report occasional connectivity issues and minor app performance problems. Overall, it is well-regarded for its convenience and energy-saving features.

Common complaints include minor delays in response times when using voice commands and occasional disconnections from the WiFi network.