peter@TVC15:~/pistreaming $ python3 server.py
$ sudo apt-get install libav-tools git python3-picamera python3-ws4py python3-pantilthat
$ git clone https://github.com/waveform80/pistreaming.git
$ cd pistreaming
$ git checkout pantilthat
$ python3 server.py


Initializing HAT
Traceback (most recent call last):
  File "server.py", line 259, in <module>
    main()
  File "server.py", line 199, in main
    hat.servo_enable(1, False)
  File "/usr/lib/python3/dist-packages/pantilthat/pantilt.py", line 395, in servo_enable
    self.setup()
  File "/usr/lib/python3/dist-packages/pantilthat/pantilt.py", line 72, in setup
    self._i2c = SMBus(1)
FileNotFoundError: [Errno 2] No such file or directory