Orbit Research Orbit Reader 20 User Manual page 31

Consult the documentation for the screen reader of choice for details about
which protocol (Serial or HID) and commands to use for that screen reader.
iOS Devices (Version 10.0 or later) SB Connectivity
Connecting Orbit Reader to an iOS device provides both braille feedback and
the ability to type and control the device with the Orbit Reader keyboard and
directional buttons.
In default configuration, the Orbit Reader is ready to pair with iOS with
Bluetooth. If Bluetooth has been turned off, it can be turned on in the Menu
or by pressing Space + dots 4 7 on the Orbit Reader.
Next, on the iOS device go to
Settings>General>Accessibility>VoiceOver>Braille and look for the name of
the unit in the list of possible braille displays. It shows up as Orbit Reader
plus the last four digits of the serial number.
Activate the Orbit Reader 20 device in the list to initiate pairing. iOS shows
you a dialog with a security code to confirm you want to pair with the Orbit
Reader. Check to make sure that the security code on the display matches
the code in the iOS security dialog. If the codes match, confirm this in the
dialog on the iOS device.
Once you pair the unit, iOS should start sending braille to the Orbit Reader,
and you can use the Orbit Reader input and navigation keys to control your
iOS device.