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WiFi 16 Relay Module, TCP/IP, UDP, Virtual Serial Port - DIN BOX

This Wi-Fi 16 Relay Module with standart DIN RAIL BOX is designed for easy wireless control of electrical devices. You can control lights, garage doors, window blinds, irrigation systems and so on just with several clicks from your Laptop, Tablet or Mobile phone. Supported by DRM and DRMv3 Software. Works with Home Assistant, Domoticz and OpenHAB home automation systems as well as with Node-RED IoT platform. For advanced users we provide TCP/IP, UDP and Virtual COM Port integration protocol software source code examples.

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  • 16 SPDT relay channels (the type depends on the stocks quantity in our store):
    • TONGLING - JQC-3FF-S-Z (10A / 250VAC, 15A / 120VAC, 10A / 28VDC)
    • SUNHOLD - RAS xx15 (10A / 250VAC, 15A / 120VAC, 15A / 24VDC) 
  • Supply source voltage is selectable during purchase:
    • 12V DC / 600mA
    • 24V DC / 400mA
  • Wireless Wi-Fi 802.11 b/g/n standart;
  • External Wi-Fi antenna for better range;
  • Supported Wi-Fi modes: AP (Access Point), STA (Station) and AP+STA (Access Point + Station);
  • Supported Wi-Fi encryption modes:
    • WEP;
    • WPA2PSK-AES;
  • WEB server configuration of system parameters;
  • WEB server secure login authorization;
  • Standart network protocols: DHCP, DNS, ICMP (ping);
  • Control relays via TCP/IP, UDP or Virtual Serial (COM) Port;
  • Can be controlled by smartDEN IP-32IN module (box-to-box);
  • Led indicators: Relays, Power ON, Wi-Fi link, Ready Status;
  • Hight quality PCB: FR4 / 1.5mm / two layers / metalized holes / HAL / white stamp / solder mask / extra PCB openings for better voltage isolation / doubled PCB tracks for better voltage isolation;
  • Operating temperature range: from 0 ºC to +70 ºC;
  • Dimensions: W=85mm x L=210mm x H=58mm;
  • Supported by DRMv3 Software (Windows, Linux, Raspbian) - New;
  • Supported by DRM software (Windows, Linux, Raspbian): Yes
  • Supported by DAE-aModules App for Android;
  • Supported by Denkovi Command line tool (Windows, Linux, Raspbian): Yes
  • Supported by various third party software (Android, iOS, Windows);
  • Supported by Home Assistant home automation software - New;
  • Supported by openHAB home automation software;
  • Supported by Domoticz home automation software;
  • Supported by Node-RED IoT platform;
  • Software examples: here;
  • Documentation: here.


Please note the product does not come with power supply adapter that you may need. We offer suitable adapters with plug-in outlet or DIN Rail BOX on this link:



Application Examples

The Wi-Fi 16 Relay Module can control devices wirelessly.

Control electrical devices wirelessly


Easy access Wi-Fi 16 Relay Module via Internet and control electrical devices from Smartphone, Laptop or Tablet.

Controlling Wi-Fi 16 Relay Module via Internet


Wi-Fi 16 Relay Module can be accessed via Virtual Serial (COM) Port

Control electrical devices via Virtual Serial (COM) Port


Wi-Fi 16 Relay Module can controlled by some of smartDEN Input Module's analog/digital/temperature inputs via Internet/Ethernet (box-to-box mode). Please check out our application note about this mode.



Denkovi Relay Command Line Tool


Supported OS: Windows Linux Raspbian


Although this is utility for USB relays, we added and the Wi-Fi relay boards to it in order to provide flexibility and compatibility with currently already developed systems based on our USB 16 Relay Modules.

Here the logic is similar to the USB relay boards control. Instead of ID or serial number, we have IP address:Port. Instead of relay board model, we have wifi16-tcp or wifi16-udp which set the communication method. Everything else is the same.

Example commands:

LIST COMMAND - obviously this command will display only the USB relay boards and not the Wi-Fi boards as they are network devices.

java -jar DenkoviRelayCommandLineTool.jar list 


STATUS COMMAND - display relay(s) status(es).

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp 2 status

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp all status


SET COMMAND - set relay(s) state(s).

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp 2 1

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp all 0

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp turn 1110


TIMER COMMAND - execute time-critical operations. Well known fact is that every time when we run the command line tool the jvm is being run and this takes significant time. Many users contacted us with requests to execute timer commands for time-critical operations. That's why we added such command. It can perform single pulse, many pulses and even cycles with more complex sequences of pulses and every pulse can be with different time (in milliseconds). Please note the state bits must be equal to the relay number!

java -jar DenkoviRelayCommandLineTool.jar wifi16-tcp timer 1,1111,10,0000,50,1111,25 //makes all relays ON for 10ms, all OFF for 50ms and all ON for 25ms


  • For more information - here
  • For download - here




Access via software DRMv3

This device is supported by DRMv3 Software.

The device can be found in the device list under the default name: Wi-Fi 16 Relay TCP/UDP







Configuration via Web Browser

The built-in web server provides ability for basic configuration of the module, like network settings, TCP/IP and UDP sockets parameters, wireless settings, passwords. Please note the relays can not be controlled via the web server!


Wi-Fi 16 Relay Module - web server



Control via Virtual Serial (COM) Port technology

Nowadays there are lot of software applications still using/preferring serial port communications. One key feature of the module is that it supports Virtual Serial (COM) Port controlling of the relays. For example in Windows, controlling of the module is done via Virtual COM Port, shown in device manager, like in the screenshot bellow.


Wi-Fi 16 Relay Board - Virtual Serial Port



Access from Home Assistant

Home Assistant is very powerful home automation system. Please checkout our application note for more information.




Access from OpenHAB

OpenHAB is a third party open source free home automation software. Run your server on Linux, macOS, Windows, Raspberry Pi, PINE64, Docker, Synology... Access it with apps for the web, iOS, Android and others. Use a powerful and flexible engine to design rules, with time and event-based triggers, scripts, actions, notifications and voice control.


It is possible to control the device via TCP binding. More information about the integration with our hardware - or contact with us.




Access from Domoticz

Domoticz is a free open source popular home automation software which can run on Windows, Linux, MAC, Rasberry PI and others. It is a home automation system design to control various devices and receive input from various sensors. Access it with apps for the web, iOS, Android and others.


More information about how to connect and use it with our hardware - or contact with us.




Access from Node-RED

Node-RED is a flow-based programming platform for the Internet of Things. We prepared small example for communication between Node-RED and our device. More info about Node-RED and denkovi modules: here

You can download the example Node-RED flows from here:  TCP communication flow





Access from DAE-aModules Android App

Android app on Google Play



Some useful information about DAE-aModules and Wi-Fi 16 Relay Board:

  • Select device Wi-Fi 16 Relay Module TCP or Wi-Fi 16 Relay Module UDP. Enter the IP address of the board and TCP/UDP Port


Control via Android Apps

There are really lot of mobile apps capable to send TCP/IP and UDP messages. One such free app is Socket Control Widget for Android devices. It is simple and creates widget buttons on your screen where every button can control a relay(s).


Control Wi-Fi 16 Relay Board via Android Control Wi-Fi 16 Relay Board via Android




Denkovi software


Third party software


Software examples (Source Code)

  • Node-RED IoT platform - example communication flow using TCP communication. More about Denkovi modules and Node-RED: here.
  • Java - A netbeans project, demo which is able to set and get relays status via TCP/IP or UDP sockets.
  • VB.NET - example how to set and read the status of the relays. The executable file ready for using is here
  • C#.NET - example how to set and read the status of the relays.
  • C++.NET - example how to set and read the status of the relays.
  • Delphi Lazarus - example how to set and read the status of the relays.
  • PHP Live Demo - Code is here.
  • Visual Basic 6 (TCP Socket) - example how to communicate with the module using TCP commands.
  • Node.js (TCP Sockets) - example how to communicate with the module using TCP socket commands in Node.js.
Wireless 802.11 relay
Wi-Fi 16 Relay Module
With DIN Rail BOX

by Dimitrii, 27 Mar 2017

Great product with useful functions!


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