MHCOZY WiFi Smart Switch Relay Module (1CH WIFI Bluetooth) User Manual

1. Introduction

This manual provides comprehensive instructions for the installation, setup, and operation of the MHCOZY 1-Channel WiFi Smart Switch Relay Module (Model ew124). This device enables remote control of electrical appliances via the eWeLink app, and integrates with voice assistants like Amazon Alexa and Google Assistant. It supports both inching and self-locking modes, making it suitable for various home automation applications, including garage door control and lighting.

Figure 1.1: MHCOZY 1-Channel WiFi Smart Switch Relay Module.

2. Safety Information

• Power Disconnection: Always disconnect power to the circuit before installing or performing any maintenance on the device. Failure to do so may result in electric shock or damage to the device.
• Voltage Compatibility: Ensure the power supply voltage (DC 5-32V) and appliance voltage are within the specified limits for the module and relay.
• Current Rating: Do not exceed the maximum current rating of 10A for the relay. Overloading can cause damage or fire.
• Professional Installation: If you are unsure about wiring or electrical connections, consult a qualified electrician.
• Indoor Use: This device is designed for indoor use. If used outdoors, it must be housed in a waterproof enclosure.

3. Product Overview

The MHCOZY WiFi Smart Switch Relay Module is a compact device designed to add smart control capabilities to existing electrical systems. It features a single relay channel with clean contact passive output, meaning it provides a dry contact closure without output voltage.

Figure 3.1: MHCOZY 1-Channel WiFi Smart Switch Relay Module and its internal components, alongside eWeLink app and voice assistant devices.

3.1. Components and Connections

Figure 3.2: Detailed view of the module board, highlighting key components and connection points.

• Power Supply 1 (USB 5V): Micro USB port for 5V DC power input.
• Power Supply 2 (AC/DC 7-32V): Screw terminals for 7-32V AC/DC power input.
• Relay Output (NO, COM, NC): Dry contact terminals for controlling external devices.
  • NO (Normally Open): Contact is open when the relay is off, closed when on.
  • COM (Common): Common terminal for the relay.
  • NC (Normally Closed): Contact is closed when the relay is off, open when on.
• Manual Button: Physical button for local control.
• Configure Button: Used for pairing the device with the eWeLink app.
• WiFi Module: Integrated module for 2.4GHz WiFi and Bluetooth connectivity.
• 10A Relay: The switching component with a maximum current rating of 10 Amperes.

4. Specifications

Figure 4.1: Approximate dimensions of the MHCOZY 1-Channel WiFi Smart Switch Relay Module.

5. Setup

5.1. eWeLink App Download

The MHCOZY Smart Switch requires the eWeLink app for configuration and remote control.

1. For Android devices, download the "E-WeLink.apk" directly or search "eWeLink" in the Google Play Store.
2. For iOS devices, search "eWeLink" in the Apple App Store.
3. Alternatively, you can visit the official download page: http://app.coolkit.cc/dl.html

5.2. Wiring Instructions

The module requires a power supply and connections to the appliance you wish to control. Ensure all power is disconnected before wiring.

5.2.1. Powering the Module

The module can be powered by either a 5V USB source or an AC/DC 7-32V source. Choose one method.

• USB 5V: Connect a standard Micro USB cable to the USB port on the module and to a 5V USB power adapter.
• AC/DC 7-32V: Connect the power source to the "Input AC/DC 7-32V" screw terminals. Observe polarity if using DC.

Figure 5.1: Power supply options for the module (USB 5V or AC/DC 7-32V) and basic appliance connection.

5.2.2. Connecting to an Appliance (Dry Contact)

The relay provides a dry contact output, meaning it acts like a switch without supplying voltage. You will connect the appliance's control circuit to the NO (Normally Open) and COM (Common) terminals for most applications.

Figure 5.2: Example wiring for controlling an appliance (e.g., light) using the relay's dry contact output, emphasizing separate power sources.

For applications like garage door openers or access control buttons, connect the module's NO and COM terminals in parallel with the existing push button.

Figure 5.3: Example wiring for integrating the module with an access control button or garage door opener.

Important: The power supply for the module (5-32V) is separate from the power supply for the appliance being controlled by the relay. The relay output (NO, COM, NC) does not provide voltage.

5.3. Pairing with eWeLink App

To control the module via the eWeLink app, you need to pair it with your Wi-Fi network.

1. Prepare for Pairing:
   • Ensure your smartphone is connected to a 2.4GHz WiFi network. If your router has dual bands with the same SSID, temporarily disable the 5GHz band or ensure your phone is explicitly connected to 2.4GHz.
   • Enable Bluetooth and Location Services on your smartphone.
   • Power on the MHCOZY module. It will automatically enter Quick Pairing Mode, indicated by the LED flashing two short blinks followed by one long blink.
2. Open eWeLink App: Launch the eWeLink app on your smartphone.
3. Add Device: Tap the "+" icon or "Add Device" option in the app.
4. Select Pairing Method: Choose "Bluetooth Pairing" for the easiest setup.
5. Initiate Pairing on Module: If the module is not already in pairing mode, press and hold the "Configure" button on the module for 5 seconds until the LED indicator flashes as described above (two short, one long).
6. Scan for Devices: The app will scan for nearby Bluetooth devices. Select your MHCOZY module from the list and tap "Connect".
7. Complete Setup: Follow the on-screen prompts to connect the device to your 2.4GHz WiFi network and name it.
8. Compatible Mode (If Quick Pairing Fails): If Bluetooth pairing fails, long-press the "Configure" button again until the LED flashes quickly and continuously. Then, select "Compatible Mode" in the eWeLink app and follow the instructions.

Figure 5.4: Visual guide for pairing the device with the eWeLink app.

6. Operating Modes

The MHCOZY module supports two primary operating modes, configurable within the eWeLink app:

6.1. Inching (Momentary) Mode

• In this mode, the relay will turn ON for a set duration (e.g., 0.5 seconds to 1 hour) after being triggered, and then automatically turn OFF.
• This mode is ideal for applications requiring a brief contact closure, such as activating a garage door opener, a momentary push button, or a computer power button.
• The inching time can be adjusted in the eWeLink app.

6.2. Self-locking (Toggle) Mode

• In this mode, the relay acts like a standard ON/OFF switch. One command turns it ON, and another command turns it OFF.
• This mode is suitable for controlling lights, fans, or other appliances that require continuous power until manually switched off.

You can switch between these modes and adjust settings within the eWeLink app for each channel.

7. Voice Control Integration

The MHCOZY module is compatible with popular voice assistants, allowing for convenient hands-free control.

7.1. Amazon Alexa

1. Open the Amazon Alexa app.
2. Go to "Skills & Games".
3. Search for "eWeLink Smart Home Fan" skill.
4. Enable the skill and link your eWeLink account.
5. Discover devices. You can now use voice commands like "Alexa, turn on [Device Name]".

7.2. Google Assistant

1. Open the Google Home app.
2. Tap "Add" (+) > "Set up device" > "Works with Google".
3. Search for "Smart We Link".
4. Link your eWeLink account.
5. You can now use voice commands like "Hey Google, turn off [Device Name]".

7.3. Apple Siri

You can integrate control with Siri by creating custom shortcuts within the eWeLink app. Refer to the eWeLink app's documentation for detailed instructions on creating Siri Shortcuts.

8. Maintenance

• Cleaning: Use a dry, soft cloth to clean the device. Do not use harsh chemicals or abrasive cleaners.
• Firmware Updates: Periodically check the eWeLink app for available firmware updates to ensure optimal performance and security.
• Environmental Conditions: Avoid exposing the device to extreme temperatures, high humidity, or direct sunlight.

9. Troubleshooting

10. Warranty and Support

10.1. Warranty Information

Specific warranty details for the MHCOZY WiFi Smart Switch Relay Module are typically provided at the point of purchase or by the seller. Please refer to your purchase documentation or contact the retailer for warranty terms and conditions.

10.2. Technical Support

For technical assistance or inquiries regarding your MHCOZY product, please contact customer support:

• Email: MHCOZY@outlook.com
• Manufacturer: mic technology co.,ltd

Figure 10.1: Product label showing manufacturer and contact details.