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µVISION DEBUGGER: Installing the Nordic nRFProbe Driver

Information in this knowledgebase article applies to:

  • C51 All Versions


1) I want use the Nordic nRFProbe debug tool with Keil µVision, but the nRFProbe driver doesn't show up in the driver list. I've uninstalled and reinstalled the nRF24LE1 tools but it doesn't help. What could be wrong?


2) I have a project from Nordic. In the Keil IDE, after selecting Flash-> Download, an error window appears:

"Error: Can't load driver 'C:\Keil\C51\BIN\nrfkeil515.dll' !"


To get the latest nRFProbe driver:

  • Go to Nordic Semiconductor website
  • Search for "nRFProbe"
  • In the search results, click on the executable
  • Save the file
  • Run the executable and when prompted, point to the Keil folder on your hard drive

You must make sure you install the Keil tools in same folder as the nRF24LE1 tools. The easiest way to insure this is to use the default folders when installing µVision and the nRF24LE1 tools.


Last Reviewed: Wednesday, May 22, 2019

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