Sniffer occasionally works but appears unstable

nRF Util
tags
nRF Util

Ensure that you are using the correct software versions as specified in the prerequisites.

When programming the nRF Sniffer firmware, make sure to use the latest SEGGER J-Link software. If you used an older version, update your J-Link and program the firmware again.

If the problem persists, force J-Link to use flow control in the serial connection:

  1. Open JLink.exe (Windows) or JLinkexe (macOS/Linux) in the installation folder of the required J-Link version.
  2. Enter sethwfc force.
  3. Exit the J-Link software.