Datasheet

3. Manually Burning the Bootloader via nrfjprog

You can also manually burn the bootloader from the command line, using `nrfjprog` from Nordic.

You can either download nRF5x-Command-Line-Tools (https://adafru.it/vaJ) for OSX/Linux/Win32, or use the version

that ships with the BSP in the tools/nrf5x-command-line-tools folder.

Run the folllwing commands, updating the path to the .hex file as appropriate:

$ nrfjprog -e -f nrf52

$ nrfjprog --program bootloader_with_s132.hex -f nrf52

$ nrfjprog --reset -f nrf52

You should see something similar to the following output, followed by a fast blinky on the status LED to indicate that

you are in DFU/bootloader mode since no user sketch was found after the device reset:

OS X Note: You may need to create a symlink in `/usr/local/bin` to the

All commands below were run from 'tools/nrf5x-command-line-tools/osx/nrfjprog'

$ ./nrfjprog -e -f nrf52

Erasing code and UICR flash areas.

Applying system reset.

$ ./nrfjprog --program ../../../../bin/bootloader/bootloader_v050_s132_v201.hex -f nrf52

Parsing hex file.

Reading flash area to program to guarantee it is erased.

Checking that the area to write is not protected.

Programing device.

$ ./nrfjprog --reset -f nrf52

Applying system reset.

Run.