Who is RelayModule?

Founded in 2014, RelayModule is a company specialising in the production, research, development and sales of professional relay modules. With over 100 employees, including more than 20 dedicated R&D engineers, the company has established itself as a key player in the sector.

Their philosophy is summed up in a single tagline: “Simplified technology provider” — making complex technologies easy to integrate, so you can focus on what truly matters: your project.

All their products are certified to ISO 9001 and IATF 16949 standards, and carry UL, CQC and TÜV approvals — a guarantee of quality and reliability you will find in every module.

A complete range for every need

Relay Modules for Industrial and Smart Control Applications

Whether you need to switch loads in a factory, control lighting in a smart building, or automate garden equipment, RelayModule offers a relay module for every connectivity requirement. All modules are plug-and-play, with no protocol knowledge required, and the number of channels can be customised on request.

Module	Description	Key features	Applications
USB Relay Module	Plugs directly into your computer like a standard serial port — no USB protocol knowledge required. Up to 64 onboard SPDT relays, TTL GPIO I/Os (3.3 V) and 10-bit analog inputs.	64 SPDT relays · 8 TTL GPIOs (3.3 V) · 6 analog inputs 10-bit (0–3.3 V) · USB CDC interface	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
Ethernet Relay Module	Brings network connectivity to your installation. Password-protected web console and HTTP/Telnet interface. Individual status LED per channel.	3 SPDT relays · 10 A max switching current · 10 TTL GPIOs · 10 analog inputs 10-bit · Web console + HTTP/Telnet	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
Modbus Relay Module	The benchmark for Modbus RTU/TCP compatible industrial automation. Relay timer, watchdog for fail-safe operation, configurable power-on states.	16/32/64 SPST relays (250 V/5 A each) · 8 digital I/Os · 6 analog inputs · Watchdog & relay timer	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
WiFi Relay Module	Control your installations remotely over your WiFi network. Unique MAC address for reliable network identification.	8 SPDT relays · 10 A max · 10 TTL GPIOs · 10 analog inputs 10-bit · Unique MAC address	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
Bluetooth Relay Module	Compact wireless solution for short-range connectivity (up to 10 m). Connects to any Class 2 Bluetooth device. Firmware update via onboard USB.	2 SPDT relays (12 V) · 7 A max · 8 TTL GPIOs · 7 analog inputs 10-bit · Bluetooth Class 2 (10 m)	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
PoE Relay Module	Power and control with a single network cable. Password-protected web/Telnet console, unique MAC address.	16 SPDT relays (12 V) · 7 A max · 8 digital inputs (12 V) · Ethernet 10BASE-T + PoE · Unique MAC address	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby

Customised PCBA Solutions

RelayModule does not stop at off-the-shelf products. Every module in the range can be customised to match your exact requirements — number of relay channels, form factor, input/output configuration, communication interface, and more. Whether you are integrating a module into an existing product or designing a new system from scratch, the engineering team works with you to deliver a PCBA solution that fits your design seamlessly.

The GPIO module range is a natural foundation for custom PCBA projects, offering a broad selection of connectivity options and I/O densities:

Module	Description	Key features	Applications
Bluetooth GPIO	Generic I/O control over Bluetooth Class 2 (up to 10 m). Onboard controller is reprogrammable for custom applications.	8 TTL GPIOs · 6 analog inputs 10-bit · 25 mA Source/Sink · Reprogrammable controller	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
Ethernet GPIO	Network-connected GPIO with simple web interface — no TCP/IP knowledge required.	16 GPIOs (3.3 V) · 10 analog inputs 10-bit · Web interface or Telnet	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
Modbus GPIO	Industrial-grade GPIO module fully compatible with Modbus RTU/TCP automation software.	16/32 GPIOs (3.3 V) · 8–14 analog inputs 12-bit · Watchdog & GPIO timer · Configurable power-on states	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
USB GPIO	High-density GPIO module controlled like a serial port — no USB protocol knowledge needed.	64 TTL GPIOs (3.3 V) · 32 analog inputs 12-bit · 20 mA Source/Sink · USB CDC interface	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby
WiFi GPIO	Wireless GPIO control over WiFi with analog input capability and unique MAC address.	16 GPIOs · 14 analog inputs 10-bit · 25 mA max I/O current · Unique MAC address	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby

Intelligent Control Products with Software Support

Beyond the hardware, RelayModule provides proprietary software tools designed to make integration as fast and effortless as possible. These tools cover plug-and-play operation out of the box and open the door to secondary development for OEMs and system integrators who need deeper customisation.

The Programmable Relay Module is the flagship of this software-driven approach. Built around an ATmega328p microcontroller with 32 KB of flash memory and fully compatible with the Arduino IDE, it allows you to embed your own control logic directly into the module — no external controller required. With 4 digital I/Os, 4 analog inputs and 2 PWM outputs alongside 2 SPDT relays, it is the ideal building block for intelligent, standalone control systems.

Module	Description	Key features	Applications
Programmable Relay Module	Embed your own control logic directly into the module. ATmega328p microcontroller, Arduino IDE compatible. Deploy autonomous control programs with no external host required.	2 SPDT relays · 7 A max · ATmega328p 32 KB flash · 4 digital I/Os · 4 analog inputs · 2 PWM outputs · Arduino IDE compatible · USB interface via FT232RL	Home & industrial automation · Lighting control · Garden equipment · Test fixtures · DIY & Hobby

For all other modules in the range, the self-developed software tools ensure that any engineer — regardless of their familiarity with the underlying protocol — can integrate the module into their system quickly, and extend its behaviour through scripting or custom software development.

Why choose these modules?

• Universal integration. All modules in the range work straight out of the box with no protocol knowledge needed. Plug in, take control. Getting started is immediate, whether you are a beginner or a seasoned engineer.
• Unlimited customisation. The number of channels can be tailored on request. Have a specific requirement in terms of channels or configuration? Custom versions are available.
• Industrial certifications. ISO 9001, IATF 16949, UL, CQC, TÜV: these modules meet the most stringent market requirements.
• Lifetime warranty. All RelayModule products come with a lifetime warranty, a testament to the manufacturer’s confidence in the durability of their products.
• Software support included. Proprietary software tools facilitate secondary development and the plug-and-play experience, saving you valuable time on every project.
• Wide application coverage. These modules cover an exceptionally broad range of uses: home automation, industrial automation, lighting control, automated garden equipment, test fixtures, and DIY & hobby projects.

Request a quote

Interested in one or more of these modules for your project or series production? ARTRONIK COMPONENTS supports you from technical selection through to delivery.

Fill in our contact form to submit your price request. Let us know the model(s) you are interested in, the quantities required and any specific requirements — our technical team will get back to you promptly.

You are also welcome to reach us directly by email or phone. We will be happy to review your needs and propose the most suitable solution.