SOfTWARE
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4.4 Applications of the COMBIVIS mobile App
Ambient conditions:
•
Industrial environment, production, machinery
•
Lift applications / elevator shaft with own KEB Elevator App for COMBIVERT F5
drive controller
4.5 Connection setup
The adapter is visible to the user via the App. The adapter can be selected via the App.
The connection setup from the Bluetooth-Adapter to the COMBIVIS mobile App works
via the "Just Works" method. This means there is no need to enter a key, which is ex-
changed via Bluetooth. There is no Bluetooth bonding. Encryption that goes beyond the
normal mechanisms of Bluetooth is not necessary.
After Bluetooth pairing is performed, the adapter expects writing of a defined write-only
GATT characteristic with a key value. The value can be found on the housing of the
adapter. The key is numeric and 6 characters long.
Until the correct key has been written, all other GATT Write Requests are answered with
an error and otherwise ignored. If the correct key is not written within 30 seconds, the
adapter terminates the Bluetooth connection.
After the correct key has been written, the adapter is ready for normal use. Further write
requests on the key characteristic are ignored. This shifts the entry of the key from the
operating system to the App.
The adapter does not store any coupling info, the KEB App stores the key for the adapter
(no Bluetooth bonding). The Bluetooth data transmission is permanently unencrypted
without coupling.
