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3. Preparing Host

3.1. Installing nRF Util

1. Download and install the SEGGER J-Link Software from https://www.segger.com/downloads/jlink/:

   Code Block
   sudo dpkg -i JLink_Linux_V794e_x86_64.deb

2. Install the libusb-1.0 package:

   Code Block
   sudo apt install libusb-1.0-0

3. Download and install the nrf-udev package from https://github.com/NordicSemiconductor/nrf-udev/releases:

   Code Block
   sudo dpkg -i nrf-udev_1.0.1-all.deb

4. Download the latest nrfutil executable from https://www.nordicsemi.com/Products/Development-tools/nRF-Util, give it the execute permission, and move it to a folder that is in the system's PATH:

   Code Block
   chmod +x nrfutil sudo mv nrfutil /usr/local/bin

5. Install the nrfutill device command:

   Code Block
   nrfutil install device

3.2. Identifying Nordic Devices on the Linux Host

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1. If needed, disable access protection on the nRF5340 network core:

   Code Block
   nrfutil device recover --serial-number <serial number> --core Network

2. Program the release image to the nRF5340 network core:

   Code Block
   nrfutil device program --serial-number <serial number> --core Network --firmware thingy9151lite_nrf5340_cpunet_app_on_nrf5340dk_***_release.hex

3. Alternatively, program the application image from the build tree:

   Code Block
   nrfutil device program --serial-number <serial number> --core Network --firmware thingy9151lite_nrf5340_cpunet_app/build/zephyr/zephyr.hex

4. Reset the network core:

   Code Block
   nrfutil device reset --serial-number <serial number> --core Network

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