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  • USB to I2C Converter
  • Master Communications to I2C Nodes
  • Self Powered by the USB Port
  • Mounts as a COM Port
  • Compatible with All NCD I2C Devices
  • FT230XS USB to Serial Converter
  • Free Windows AnyI2C Software
  • Compatible with Windows with full GUI Interface
  • Hardware Compatible with Linux and Mac (No Software)
  • USB Micro Interface to 4-Pin I2C Port
  • 115.2K Baud Default Baud Rate
  • Hardware I2C Port at 100KHz


SKU: PR33-17 UPC: 689860067370 Categories: , ,


USB to I2C conversion should be easy, powerful, and fast!  Convert USB to I2C using over a virtual COM port with two simple commands for writing and reading I2C data.  Connect NCD I2C devices with a desktop computer using this tiny I2C adapter and take control using our software or pick apart the source code and write your own software in any language that supports the FTDI FT32XS virtual COM port driver (which is just about all computers and languages).  Plug in our USB to I2C converter into any available USB port on your PC and it mounts as a COM port, start sending commands at 115.2K Baud.  Use our FREE AnyI2C software and start talking to the complete ecosystem of NCD I2C Devices with just a few button clicks.  Watch data communications in the Log window so you can see it work.

Use this USB interface to read sensors, control relays and PWM controllers.  Use in industrial 4-20 mA read/write applications, and much more.  Read light sensors, temperature/humidity sensors, potentiometers, moisture sensors, all at a very low cost.  This converter is hardware compatible with all programming languages and operating systems that support the FT230XS.  Drivers are available from

Includes USB Type A to USB Micro Cable.

The Best USB to I2C Converter Available!

This USB to I2C converter is now one of our most popular products with TONS of repeat customers!  We’ve seen all the USB to I2C converters from other companies, some charging a fortune and require specialized drivers that are hard to implement.  Some converters don’t even work without tons of software setup.  This converter is ready to go to work immediately!  Plug it in and it’s ready to start talking to I2C devices, no complex configuration, and no bizarre drivers.


Order Shipping 6/27/2019 Include Updated firmware to Issue a Stop Command Regardless of Error or No-Error on the I2C Bus.  This version also includes all Version 3 Changes.


Orders shipping 5/7/2018 and later now include an updated version of firmware that increases compatibility, is 3x faster, and adds new simplified I2C communication commands.  Documentation for this update is currently being prepared.

Version 3 Changes:

  • Added Simplified I2C Write Command
  • Added Simplified I2C Read Command
  • I2C Communications is Now Hardware Based, Not Software Based
  • I2C Communications Speed has Improved from 38KHz to 100KHz
  • Software Programmable Communication Speeds:
    • 38KHz, 100KHz, 200KHz, 300KHz, and 400KHz
  • Programmable Baud Rates Supported:
    • 9600, 19.2K, 38.4K, 57.6K, 115.2K. 230.4K

nodeLynk Master Adapter

This is a nodeLynk Master adapter.  nodeLynk Master adapters speak to a chain of nodeLynk devices using I2C communications.

What is nodeLynk?

Chain expansion devices using nodeLynk. Connect a wide variety of accessories to expand the capabilities of a nodeLynk compatible controller.  Use nodeLynk to add Relay Controllers, Sensors, PWM Drivers, Displays, and a wide variety of 4-20mA, 0-10V ADCs and DACs, as well as a wide array of TTL & Isolated GPIO devices.  All nodeLynk devices use I2C communications to chain devices together.  nodeLynk is an easy way to expand functionality without soldering.  nodeLynk allows expansion in seconds so you can focus on your software and firmware development.





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Product Identification
SKU: PR33-17
UPC: 689860067370
Country of Origin: US
HTS Code: 854231
1+ Pieces
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25+ Pieces
100+ Pieces

USB Micro Cable OptionChange

This device requires a USB Micro Cable. Please choose the cable option below if you do not already have one.


We Customize Just for You!!

NCD offers many custom IoT electronic design services to help tailor our product to your exact needs.  Whether you are looking for custom firmware, circuit board modifications, metal enclosures, or industrial color printing, we can help you with a wide variety of design services.

Custom IoT Electronic Design Services Process

Most of our users purchase off-the-shelf hardware for initial testing.  Once everything is working, they contact us to build a custom solution which may include specialized changes to the board, firmware, connectors, etc.  Custom boards have many advantages such as reduced wiring, easy installation, small size, less power consumption, and in some cases, an overall reduction in product cost.  Custom IoT Electronic Design Services will have your company name and logo on the board as well as the enclosure.

Customized IoT Electronics

NCD engineers can help build a customized solution for your particular application based on the designs you see on our website.  We can combine devices onto a single board, change the shape, or even some of the components to meet your exact needs.  We also provide turn-key metal enclosures with powder coating and full-color printing on the top side starting at just $500 for setup!  We have more than 20 years of experience in electronics design and manufacturing.  All of our products are designed and manufactured in the USA, so we are here to support the products we make.  We only ask that our customers prototype their needs using our existing products before we customize.

Customization Guidelines

  • Custom designs should be based on our existing product because we can’t build rockets or electric cars over here!
  • We do not provide customization services if it involves the introduction of a new or untested technology.
  • Custom engineering fees depend on your requirements, so please contact us for a quote!
  • We maintain ownership of all designs, including our customized designs as they are based on our existing Design.
  • We will only ship the customized product to you or your authorized agents.
  • We have an NDA available if needed.
  • The turn-around time is about 2-3 weeks.
  • We specialize in low-volume designs, no quantity is too small!
  • We have the ability to scale to large volumes as needed.

Getting Started with Product Customization

All you have to do is contact us and we will walk you through the process from beginning to end, based on your individual needs.  Some people are surprised at how fast we finish CAD design (usually a few hours), but keep in mind, we still have to build your design, which takes considerably more time.  When we customize product, here are the general services we provide:

  • We design the circuit board.
  • We communicate with our customers throughout the customization and manufacturing process.
  • We manufacture surface mount stencils and circuit boards.
  • We program our pick and place machines to build your boards.
  • We build a working sample and run it through our wave solder machine.
  • We test your custom IoT solution.
  • Once the design is finalized it won’t be possible to make changes during production (changes cost money and require us to repeat the above processes)
  • Once it meets all your requirements, we will start production as needed.
  • We work with our metal fabricators to design a metal enclosure if required.
  • You work with our artist to print the top side of the enclosure in full color with your company logo if required.

©2019 National Control Devices, LLC

Made in the USA
5 Year Warranty
Free Shipping on orders over $100
Free Shipping on orders over $100

To learn something new, take the path that you took yesterday. ~John Burroughs

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