jkeefe/raspberry-pi-ble-sniffer.md

## raspberry-pi-ble-sniffer.md

      
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    BLUETOOTH SNIFFER

Working to sniff Bluetooth Low Energy with the adafruit sniffer
For more information, see this blog post
Going the python route, as described here
before installing pySerial, did ...
apt-get update
apt-get upgrade

which was probably unnecessary and took a long time :-(
then did
sudo pip install pyserial

downloaded the adafruit python sniffer package, sniffer.py
sudo git clone https://github.com/adafruit/Adafruit_BLESniffer_Python.git

changed into that directory
cd Adafruit_BLESniffer_Python/

tried their example command, which worked:
sudo python sniffer.py -h

in order to get pyserial to talk with the usb port, apparently need to do this, to add the "pi" user to the dialout group:
sudo usermod -a -G dialout pi

ok, so now I need a port to listen to ... where the sniffer device is. so apparently I do this:
ls -l /dev/tty*

which lists a whole bunch of things I don't understand, except that the last lines are:
crw------- 1 root root      4,  7 Dec 31  1969 /dev/tty7
crw------- 1 root root      4,  8 Dec 31  1969 /dev/tty8
crw------- 1 root root      4,  9 Dec 31  1969 /dev/tty9
crw-rw---- 1 root tty     204, 64 May 16 13:09 /dev/ttyAMA0
crw-rw---T 1 root dialout   5,  3 Dec 31  1969 /dev/ttyprintk
crw-rw---T 1 root dialout 188,  0 Dec 31  1969 /dev/ttyUSB0

Tried the AMA0 one, which didn't work. The USB0 one, did!
sudo python sniffer.py /dev/ttyUSB0

Results:
Scanning for BLE devices (5s) ...
Found 2 BLE devices:

  [1] "" (B8:78:2E:1C:2F:10, RSSI = -104)
  [2] "MetaWear" (EA:A1:88:31:45:21, RSSI = -88)

Select a device to sniff, or '0' to scan again
> 

Very cool.