~$ bluetoothctl
[bluetoothctl]# agent on
[bluetoothctl]# discoverable on
[bluetoothctl]# scan on
[bluetoothctl]# trust <address>
[bluetoothctl]# pair <address>
~$ sudo rfcomm connect 1 <address>
~$ pip install pillow # or ...
~$ pip install -r requirements.txt
~$ python3 printer.py
Reference: