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  • USB to I2C Converter
  • Hardware Master I2C Communications to I2C Nodes
  • Mounts as a COM Port and Powered by the USB Port
  • Compatible with All NCD I2C Devices
  • FT230XS USB to Serial Converter
  • Supports I2C Read, Write, Write Read Commands
  • I2C Bus Scan Command Reports All Start Addresses
  • Supports Device Reboot Commands and Manual I2C Stop
  • Free Windows AnyI2C and Alpha Station Software
    • Including Visual Studio Libraries for Easy Use
    • Visual Studio Control Panels for Many I2C Devices
  • Hardware Compatible with Linux and Mac (No Software)
  • USB Micro Interface to 4-Pin nodeLynk I2C Port
  • 115.2K Baud Default Baud Rate, 230.4K Max Baud
  • I2C Bus Speed of 38, 100, 200, 300, and 400KHz


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.

NEW VERSION 6 Now Shipping:

Orders Shipping 8/2/2019 and Later now include Version 6, which is nearly our final release version of firmware for this device.  Version 6 includes many improvements over version 5.  Like Version 5, this device is configured using Alpha Station or later.  Alpha Station or later is required to take full advantage of device settings.  The following features were added to Version 6 Firmware.

  • Now Supports I2C Bus Scan
  • Now Supports I2C Bus Speed Selection Stored in EEPROM
  • Now Supports Bootup of I2C Bus Speed of 38, 100, 200, 300, and 400 KHz
  • Added a I2C Write + Read Command for Faster Communications with a Single Transaction
  • Added a Soft Reboot Command
  • Added a Hard Reboot Command
  • Added a Manual I2C Stop Command
  • Removed Support for Base Station Software (Not Enough Room in CPU)

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.

Designed with Visual Studio in Mind

The NCD USB to I2C Converter is a perfect companion to add automation, sensing, monitoring, and control features to Visual Studio applications.  We are always improving our Alpha Station Software framework, which includes all libraries needed to communicate to every kind of I2C sensor and controller imaginable.  Simple libraries for I2C Read, Write, and Write Read operations make it easy to talk to all kinds of hardware with minimal time investment.  Talk to displays, sensors, multiplexers, relay controllers, pulse width modulators, and more.  The Alpha Station framework is ready to go to work monitoring and controlling using Visual Studio Community Edition (free from

Control LCD Displays with Visual Studio

Control PCF8574 Display Visual Studio
Control PCF8574 Display Visual Studio

Alpha Station provides you with a working sample framework, take a look at the source code to see how easy it is to control this display:

LCD Control Visual Studio Source Code

Read MAX1069 Analog to Digital Converters with Visual Studio

Alpha Station gives you the tools you need to quickly read and display Analog to Digital Values such as the MAX1069 connected to a 8-Channel Multiplexer to display the result.  Reading and Displaying ADC Values could not get any easier.  Notice how we use the I2C Write Read Command to talk to the MAX1069 with a start address of &H37, this command handles all the low-level I2C communications to the chip, you simply specify the start address, number of bytes you would like to read (2), and the delay (0) between the Write and Read operation.  When the chip returns a response, it should be 2 bytes in Length.  The response is then converted to a 14-Bit value using the NCDLib.Math.MSLBLS14 command.  The value can then be displayed directly to the console.

MAX1069 Visual Studio
MAX1069 Visual Studio

Control a AS1115 LED Display with Visual Studio

Alpha Station Libraries make it easy to control hardware.  The AS1115 Library is used to communicate numeric values directly to a LED display.  Values from 0 to 999 are supported as well as brightness levels of 0 to 15.  Simple library calls are all it takes to setup a dedicated hardware numeric display.

Version History


Orders Shipping 7/31/2019 through 8/1/2019 and Later Include Updated firmware to Make the Stop Command in Version 4 Optional.  As the CPU is currently very full, code has been optimized in this version to reduce memory usage, Clearing the way for a Version 6.
To Use Version 4 Changes, Please Download Base Station at and click on “I2C Converter Device Configuration” and Un-check the “Reserved” Check Box, and be Sure to “Save Settings”.  Later Versions of Base Station will Indicate this option as “Smart I2C Stop”.
This change was Necessary as Version 4 Prevented Proper Operation of I2C Bus Scan Features in AnyI2C Software.


Orders Shipping 6/27/2019 through 7/30/2019 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 through 6/26/2019 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






Community Repositories


Mechanical Drawing

Wiring Diagrams

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

+MORE App customizations

We partnered with Blynk who have developed the +MORE app.  If you are interested in customization to their +MORE app then we're sure you will enjoy working with them as much as we did.  They can customize the user interface +MORE mobile app at your request.

  • Add new functionality and features to the mobile applications and web dashboard
  • Change/ add data visualizations options

Contact them today for custom App Development!

White-labeled mobile apps and dashboard

Blynk the developer of +MORE has a fantastic team of developers eager to help with your IoT applications.  They offer the following services.

We provide white-label IoT infrastructure:

  • Private IoT cloud
  • Branded mobile applications for remote monitoring and control
  • A branded web dashboard to manage fleet of your devices
  • Big Data analysis with actionable insights
  • Development of machine learning algorithms

Contact them today for all of your IoT cloud needs!

©2021 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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