I am trying to use my nRF52840 as a sniffer and am attempting to follow the directions at:
Programming the nRF Sniffer firmware (nordicsemi.com)
Note that I have downloaded sniffer firmware available at:
nRF Sniffer for Bluetooth LE - Downloads - nordicsemi.com
When I attempt to use command line tool nrfutil, I get the following response:
D:\Nordic>nrfutil device program --serial-number D9561E4XXXX --firmware sniffer_nrf52840dongle_nrf52840_4.1.1.hex
[00:00:00] ------ 0% [D9561E4DXXXX] Failed, [sdfu] firmware file extension .hex is not supported
Error: One or more program tasks failed:
* D9561E4DXXXX: [sdfu] firmware file extension .hex is not supported, code: Argument
I am not sure what I am doing wrong here. The instructions specifically say:
nrfutil device program --serial-number <serial-number> --firmware <hex>
Help! And thank you in advance.