[BRLTTY] Android app?

[Mallard]

Hello Dave,
After installing the latest apk, BRLTTY no longer crashes. I was able to 
goto settings, add my device (via Bletooth), and then select the Seika 
drive, which is listed in BRLTTY.

However, nothing happens; no braille, except the device name, firmware 
version and bluetooth name that appear at switch-on.

What am I doing wrong?

Should I not have selected the "Add device" option, as the pairing from 
the other night had been maintained?

Anyway, this is alreadya big step forward; I'm encouraged now.
Thanks, ciao,
Ollie