Troubleshooting¶
It may happen that you run into trouble while getting started with your new nRF54L15 Connect Kit. This page is here to help you solve the most common problems. If you have a new problem, you can create a new issue or discuss it on GitHub Discussions.
Which COM port is connected to nRF54L15¶
The Interface MCU exposes two COM ports, the primary COM acts as a UART bridge between the host and the nRF54L15, and the secondary COM is connected to the Interface Shell whose terminal prompt appears as ifsh:~$.
udev rules on Linux¶
On Linux, particularly Ubuntu 16.04+, you must configure udev rules to allow pyOCD to access debug probes from user space. Otherwise you will need to run pyOCD as root, using sudo, which is very highly discouraged. (You should never run pyOCD as root on any OS.)
To install, copy the rules file in the udev folder. to /etc/udev/rules.d/ on Ubuntu:
To see your changes without a reboot, you can force the udev system to reload:
By default, the rules provide open access to the CMSIS-DAP interface for all users (0666 permissions). If you share your Linux system with other users, or just don't like the idea of write permission for everybody, you can replace MODE:="0666" with OWNER:="yourusername" to create the device owned by you, or with GROUP:="somegroupname" and mange access using standard Unix groups.