Versatile 4-channel ESP32 relay board with Ethernet, WiFi, RS485, and MQTT support—ideal for smart home and industrial automation.
The DT-R004 Ethernet Relay Module is a robust 4-channel relay board powered by an ESP32 microcontroller, designed for seamless integration into smart home and industrial automation systems. It offers multiple communication interfaces, including Ethernet, WiFi, RS485, and CAN bus, and supports various protocols like MQTT, Modbus, HTTP, and CoAP. Compatible with platforms such as Domoticz, Home Assistant, and OpenHAB, the DT-R004 provides flexible control options and reliable performance.
Product Overview
- Multi-Protocol Support: Supports MQTT, Modbus RTU/ASCII/TCP/UDP, HTTP GET, CoAP, and more, ensuring compatibility with various systems.
- Multiple Communication Interfaces: Equipped with RJ45 Ethernet, WiFi, RS485, and optional CAN bus and Wiegand interfaces for versatile connectivity.
- Advanced Control Features: Includes IP Watchdog for network device monitoring, relay jogging, delay, timing, mutual control, and linkage functions.
- Home Automation Integration: Seamlessly integrates with Domoticz, Home Assistant, OpenHAB, and Node-RED for comprehensive automation solutions.
- Robust Design: Operates within a temperature range of -10°C to 85°C and supports power inputs of 12VDC/24VDC or 12VAC/24VAC.
How to Use
- Power Supply: Connect a 12VDC/24VDC or 12VAC/24VAC power source to the module.
- Network Configuration: Use the integrated web server or provided tools to configure network settings, including DHCP or static IP assignment.
- Platform Integration: Integrate the module with your preferred automation platform (e.g., Home Assistant) using supported protocols like MQTT or Modbus.
- Relay Control: Utilize the platform’s interface or send appropriate commands to control the relays as needed.
- Advanced Features: Configure additional features such as IP Watchdog, relay timing, and mutual control through the module’s settings.
Frequently Asked Questions (FAQ)
- What is the maximum current the relays can handle?
- Each relay supports up to 10A at 250VAC or 30VDC.
- Can I use both Ethernet and WiFi simultaneously?
- Yes, the module supports concurrent Ethernet and WiFi connections.
- Is the module compatible with Tasmota firmware?
- Yes, it can be flashed with Tasmota; however, ensure proper configuration to avoid conflicts, especially with GPIO16.
- Does it support over-the-air (OTA) updates?
- Yes, OTA firmware updates are supported.
- Can I control the relays remotely over the internet?
- Yes, with proper network configuration and port forwarding, remote control is possible.
- Is there a mobile app for control?
- While there’s no dedicated app, integration with platforms like Home Assistant allows mobile control.
- What is the purpose of the IP Watchdog feature?
- It monitors network devices and can reboot them if they become unresponsive.
- Can I use the module in industrial environments?
- Yes, it’s designed to operate in temperatures ranging from -10°C to 85°C.
- Does the module support secure communication protocols?
- It supports protocols like MQTT and HTTP; for secure communication, additional configurations may be required.
- Is there developer support or SDK available?
- Yes, SDKs and demo codes are available for developers.
User Review Summary
Users appreciate the DT-R004’s versatility, robust design, and seamless integration with various automation platforms. The multiple communication interfaces and protocol support make it suitable for diverse applications. Some users have noted the importance of proper configuration when flashing custom firmware to avoid GPIO conflicts.
Comparison with Competing Products
| Feature | DT-R004 Ethernet Relay Module | Devantech ETH484-B | KinCony KC868-A4 |
|---|---|---|---|
| Channels | 4 | 4 | 4 |
| Communication Interfaces | Ethernet, WiFi, RS485, CAN | Ethernet | Ethernet, WiFi |
| Protocols Supported | MQTT, Modbus, HTTP, CoAP | MQTT, HTTP | MQTT, HTTP |
| Home Automation Support | Yes | Limited | Yes |
| Operating Temperature | -10°C to 85°C | 0°C to 70°C | -10°C to 60°C |
| Price Range | $30 – $50 | $70 – $80 | $35 – $45 |
Technical Specifications
- Model: DT-R004
- Dimensions: 91.6 x 86.4 mm
- Power Supply: 12VDC/24VDC or 12VAC/24VAC
- Current Consumption: 1.5A @ 12VDC
- Relay Channels: 4 (NO/NC)
- Communication Interfaces: RJ45 Ethernet, WiFi, RS485, CAN Bus, Wiegand (optional)
- Supported Protocols: MQTT, Modbus RTU/ASCII/TCP/UDP, HTTP GET, CoAP
- Operating Temperature: -10°C to 85°C
- Mounting: DIN35 Rail
Brand or Manufacturer Info
Dingtian Technologies, the manufacturer of the DT-R004, specializes in developing reliable and versatile relay modules for industrial and home automation applications. Their products are known for robust design, multiple communication interfaces, and compatibility with various automation platforms.
Purchase Recommendations
You can purchase the DT-R004 Ethernet Relay Module from the following trusted platforms:
- DTWonder: DT-R004 Ethernet Relay Module