Destination not appearing in AirPlay selector

[aaptho]

After installing pypy and pip and all the dependencies, and downloading airtunesd by other means, I'm able to start the airplay.py script. However, even though it prints out "Ready" to the terminal and waits, no Slave In The Magic Mirror entry appears in the AirPlay selector on my iOS devices. This is with the currently released version of iOS 10.

Any ideas for debugging why it won't even show up?

P.S. To get this installed, I had to choose an older version of the construct library, as the UBInt32 and related symbols have been renamed in the current one.
pypy -m pip install construct==2.5.5-reupload

[Scvairy]

It appears on my iPad 3th, but as sound system, not as apple tv or something can handle mirroring.
Even though. it isn't working.