Sniffing logging your own Android Bluetooth traffic

Question

I recently bought chinesse device that connects via bluetooth with android phone   tablet  Since there is no application availible for windows   linux I want to create one for personal usage   Usually phone connects to the device and exchanges some data  I connected PC to the device and looked into serial debugger and menaged to discover the protocol  one way only   Phone sends only one command to the device  But this time I m not able to find out what it containts    Is there any software that will allow me to look into data sent via bluetooth  I tried decompiling the app  but it looks really unfriendly   Thanks

User · Answer

On Xiaomi Redmi Note 9s This configuration file can also be found  storage emulated 0 MIUI debug log common named as hci snoop20210210214303 cfa hci snoop20210211095126 cfa With  enabled   Settings- gt Developer Options  then checking the box next to  quot Bluetooth HCI Snoop Log  quot    I was used Total Commander for taking file from Internal storage

User · Answer

Also  this might help finding the actual location the btsnoop hci log is being saved   adb shell  cat  etc bluetooth bt stack conf   grep FileName

User · Answer

Android 4 4  Kit Kat  does have a new sniffing capability for Bluetooth  You should give it a try      If you don   t own a sniffing device however  you aren   t necessarily out   of luck  In many cases we can obtain positive results with a new   feature introduced in Android 4 4  the ability to capture all   Bluetooth HCI packets and save them to a file       When the Analyst has finished populating the capture file by running   the application being tested  he can pull the file generated by   Android into the external storage of the device and analyze it  with   Wireshark  for example        Once this setting is activated  Android will save the packet capture   to  sdcard btsnoop hci log to be pulled by the analyst and inspected    Type the following in case  sdcard  is not the right path on your particular device    adb shell echo   EXTERNAL STORAGE      We can then open a shell and pull the file   adb pull    sdcard btsnoop hci log and  inspect it with Wireshark  just like a PCAP   collected by sniffing WiFi traffic for example  so it is very simple   and well supported              source    You can enable this by going to Settings- Developer Options  then checking the box next to  Bluetooth HCI Snoop Log

[android] Sniffing/logging your own Android Bluetooth traffic

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