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Installing pyb00st in Linux

pyb00st requires python 3 and pygatt

As of today, my 3 linux systems already include pyhton 3:

  • Ubuntu 17.04
  • ev3dev
  • Raspberry Pi's Raspbian

To install pygatt:

sudo apt-get install python3-pip
sudo pip3 install pexpect
sudo pip3 install pygatt

To use pyb00st:

mkdir pyb00st
cd pyb00st
wget https://github.com/JorgePe/pyb00st/archive/master.zip
unzip master.zip

cd pyb00st-master
export PYTHONPATH=.
./examples/demo_tilt_read.py

BlueZ backend requires root privileges so when running my python script on Ubuntu and ev3dev I get a request for sudo password. On Raspbian I don't.

I found 2 workarounds for this requirement:

    By default, scanning with gatttool requires root privileges.
    If you don't want to require root, you must add a few
    'capabilities' to your system. If you have libcap installed, run this to
    enable normal users to perform LE scanning:
        setcap 'cap_net_raw,cap_net_admin+eip' `which hcitool`
    If you do use root, the hcitool subprocess becomes more difficult to
    terminate cleanly, and may leave your Bluetooth adapter in a bad state.

so:

        setcap 'cap_net_raw,cap_net_admin+eip' `which hcitool`
        setcap 'cap_net_raw,cap_net_admin+eip' `which gatttool`

or:

        sudo chmod u+s /usr/bin/hcitool
        sudo chmod u+s /usr/bin/gatttool

I tried both on my Ubuntu and it didn't work :(

Also I've noticed that sometimes, after a few runs my Ubuntu laptop, the HCI device gets stalled and I need to reboot to fix it.

The BlueGiga backend doesn't requires sudo password (at least not on my Ubuntu laptop). And never noticed stability or performance problems.