I2C/SPI Interface Device Not Identified Correctly In NI MAX

Updated Nov 5, 2020

Reported In


  • USB-8451


  • Measurement & Automation Explorer (MAX)


  • NI-845x Driver Software

Operating System

  • Windows

Issue Details

I am using an NI-845x USB as a master interface for connecting to and communicating with I2C or SPI devices.
In Windows Device Manager it's showed with the Firmware Loader status.

In NI Measurement and Automation Explorer it's presented as an Unknown device.  


To fix the issue follow these steps:
1. Plug your NI-845x USB device
2. Navigate to C:\Program Files (x86)\National Instruments\NI-845x
3. Launch FirmwareUpgrade.exe, which will remove the firmware currently installed on the device and install a new firmware
4. Restart the computer