Add HID GATT Service to BC127

IoT Modules WiFi and Bluetooth Modules
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Hello,
I will implement the HID GATT Service to the BC127.
To implement this feature I need two things.

  1. How can I include the discriptor 2906 (Valid Range)
    In the phyton script you have only the possibility to switch ON or OFF the 2902 (Client Characteristic Configuration)
    see the arrows
    db_gen_lib.add_characteristic(“2a4E”, read|write_without_response, 0, NULL, -->>> FALSE );

2.How can I set read and write permission for the Characteristic. This Characteristic are only readable, if the device are bonded.