U2C-12 Compatibility with DLN-2 Adapter

Before we developed the DLN-series USB-I2C adapters, we had a U2C-12 USB-I2C adapter that was used by thousands of our customers.

After U2C-12 adapter was discontinued, we replaced it with the DLN-2 adapter, which has exactly the same form factor. Some of our customers began to use our new API, because it provides more advanced functionality, while other customers didn’t want to change their software.

We put our customers at the center of all we do and we developed the firmware for DLN-2 USB-I2C adapter that is fully compatible with the previous U2C-12 API.

There are two versions of DLN-2 adapters: DLN-2 adapter itself with DLN firmware and DLN-2-U2C adapter with U2C-12 compatible firmware for customers which still use currently obsolete U2C-12 adapter.

DLN-2 and DLN-2-U2C adapters have identical hardware and price. The difference between them is firmware. DLN-2-U2C adapter has U2C-12 compatible firmware, so you can use it as original U2C-12 adapter.

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Identifying Device

To identify which version of DLN-2 adapter (DLN-2 itself or DLN-2-U2C) you have, navigate to Device Manager and look for “Universal Serial Bus controllers” and “Diolan DLN-series Adapters” section.

Device Manager with DLN adapters

Here you will find either DLN-2 Multi Protocol Adapter in the “Diolan DLN-series Adapters” section, if you have DLN-2 Adapter or U2C-12 USB-I2C/SPI/GPIO Interface Adapter in the “Universal Serial Bus controllers” section, if you have DLN-2-U2C adapter version.

If you do not see any of devices in the Device Manager, it may be you did not install proper setup package for your adapter version. Please note, that DLN-2 with DLN firmware uses DLN driver, which can be installed with DLN setup package (please read Installing DLN Setup Package). And DLN-2-U2C adapter use U2C-12 driver from the I2CBridge setup package, which can be downloaded from the Downloads section of the www.dlnware.com web site.

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DLN-2 to DLN-2-U2C Conversion

If you have DLN-2 adapter and want to acquire DLN-2-U2C adapter, firmware can be easily changed.

To upload U2C-12 compatible firmware to DLN-2 adapter, download U2C-12 Compatible Firmware Uploader (dln_2_u2c.exe) from the Downloads section of the www.dlnware.com web site. Plug-in board to USB port, run dln_2_u2c.exe application, choose latest available firmware version and press Upload button to upload firmware to DLN-2 adapter.

U2C-12 Compatible Frmware Uploader application

Now you have fully compatible U2C-12 board which can work with U2C-12 driver and API.

To successfully run dln_2_u2c.exe application, you need both dln.dll and i2cbrdg.dll to be installed in your system, so before you run U2C-12 Compatible Firmware Uploader, also check you have installed DLN and I2CBridge software packages.

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DLN-2-U2C to DLN-2 Conversion

It is possible to perform reverse conversion from DLN-2-U2C to DLN-2 adapter.

In this case, you need to download DLN Firmware Update (fw_update.exe) application from the Downloads section of the www.dlnware.com web site. Then close JP4 jumper on the board, plug-in board to USB, open JP4 jumper and run fw_update.exe. Choose latest available firmware version of DLN-2 adapter and press Upload button.

DLN Firmware Update application

Now you have original DLN-2 adapter which uses DLN driver and software.

In common, you can use DLN Firmware Update application for updating DLN-2 adapter as well as other DLN-series adapters you bought.

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