Description:
The ST-DC4 WiFi Wireless Relay Module is a compact and intelligent smart switch designed for DIY home automation, IoT applications, industrial control, and remote device management. Supporting a DC input voltage of 5V to 32V, this versatile relay module can operate in Self-Locking (Toggle) and Inching (Momentary) modes, making it ideal for controlling lights, garage doors, electronic locks, pumps, motors, and other DC-powered devices.
Powered by the eWeLink App, the ST-DC4 enables users to remotely control connected devices from anywhere using a smartphone. It also supports Amazon Alexa, Google Home, and IFTTT, allowing convenient voice control and smart automation routines.
Whether you're building a smart home, automating industrial equipment, or upgrading existing electrical systems, the ST-DC4 provides reliable wireless control with easy installation and stable WiFi connectivity.
Specifications:
| Specification | Details |
|---|---|
| Product Name | ST-DC4 WiFi Wireless Relay Module |
| Input Voltage | DC 5V – 32V |
| WiFi Standard | IEEE 802.11 b/g/n (2.4GHz) |
| App Support | eWeLink App |
| Working Modes | Self-Locking (Toggle), Inching (Momentary) |
| Voice Control | Amazon Alexa, Google Home |
| Smart Automation | IFTTT Supported |
| Relay Output | Normally Open (NO), Normally Closed (NC), Common (COM) |
| Wireless Control | Smartphone via WiFi |
| Installation | DIY Electronic Projects |
| Control Distance | Unlimited (Internet Access Required) |
| Communication | WiFi |
| Compatibility | Android & iOS |
| Material | High-Quality PCB |
| Operating Temperature | -20°C to +70°C |
Features:
- Supports DC 5V to 32V power input.
- Built-in WiFi wireless control.
- Compatible with eWeLink mobile application.
- Supports Amazon Alexa voice commands.
- Compatible with Google Home voice assistant.
- Supports IFTTT smart automation.
Applications:
- Smart Home Automation
- Smart Lighting Control
- Garage Door Automation
- Electric Door Lock Control
- Water Pump Automation
- Motor Switching
- Industrial Automation
- Remote Appliance Control
Safety Precautions:
- Verify the input voltage before powering the module.
- Use only a stable DC 5V–32V power supply.
- Ensure correct polarity during wiring.
- Do not exceed the relay's maximum load rating.
- Keep away from water and excessive humidity.
- Disconnect power before installation.
- Install in a ventilated enclosure for long-term reliability.
Frequently Asked Questions ( FAQs )
Q1. Which mobile app is required?
A: The relay works with the eWeLink App for Android and iOS devices.
Q2. Does it support Amazon Alexa?
A: Yes, it is compatible with Amazon Alexa for voice control.
Q3. Can I control it using Google Home?
A: Yes, Google Home integration is fully supported.
Q4. What is Inching Mode?
A: Inching mode turns the relay ON for a preset time before automatically switching OFF.
Q5. What is Self-Locking Mode?
A: Self-Locking mode keeps the relay ON or OFF until the next command is received.
Package Included:
1x ST-DC4 WiFi Wireless Smart Relay Module
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