nRF sniffer for nrf52840

[Nivetha]

I am using nrf52840 central and nrf52840 peripheral device. Ble communication is enabled between and data transmission is working. I would like to analyse the packet loss, delays etc. Hence I plugged in another nrf52840 device as a sniffer between these two. I followed the steps given in sniffer for nrf52 dkwith the unofficial hex file burnt on the sniffer nrf52 dk. However, I got an error as

Programming Failed An error occurred while programming, you might need to program manually using the nRFgo studio. How to solve this? Where do I change the UART mapping and how?

Thanks

[Sigurd]

Correct, you don't need to flash/burn any softdevice. The reason why you get the "programming failed" is actaully explained in the post you linked to.

Quoting Aryan:

The reason that you are not able to program is because the internal scripts of sniffer became outdated as nrfjprog latest version made removed '--programs' and does not allow mixing commands anymore. So it is best to program the sniffer using nRFGo or explicitly by nrfjprog.

[suvarna_kadam]

Hii I am using nRF51 Dk as peripheral device and nRF51 dongle at center. I was facing the same problem and I overcome it by using nRFGo studio. My problem is every time I have to burn sniffer hex file when I want to start sniffer or it's not auto detected if any new peripheral device is added.