Some fixes to the Python Sniffer API

[Cristiano]

Hello, I've made some fixes to the Python Sniffer API

Make sure you checkout the develop branch.

If you find them useful, consider donating an nRF52 DK ;)

Regards, Cristiano

[Hung Bui]

Hi Cristiano,

Thank you for the contribution. We have forwarded your post to our developer. nRF52 DK donation... haha nice try :P