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SOfTWARE
4.1.2 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
4.1.3 Connection setup
The adapter is displayed in the COMBIVIS mobile App if it is not connected to another
mobile device. To use the adapter in the App, a key is required, which can be found on
the housing. The connection setup is automated in the App and the user is prompted
to enter the key in the correct place if necessary. Internally, the procedure is as follows:
The connection setup from the Bluetooth-Adapter to the COMBIVIS mobile App works
via the "Just Works" method. This means that no key is required by the Bluetooth sys-
tem. There is no Bluetooth bonding. Encryption that goes beyond the normal mecha-
nisms 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 BLE bonding). Data transmission is not encrypted at Bluetooth level.
