TC77 connection with HS3100


I've been trying to connect a TC77 with a HS3100 via bluetooth, which I'm planning to use for a prototype for voice picking.
The HS31000 connects properly, but does not receive any audio from the prototype application which reads out the picks using text to speech.
It also does not pick up on the microphone from the HS3100 and instead uses the audio from the TC77.

Is it possible to get this audio from the TC77 to the HS3100?
According to the specification sheet of the HS3100 it should be possible using the EMDK but I've had no success there.

If so, how would I go about doing this?