Hello,
I was trying to implement a BTLE Peripheral with characteristics only
accessible to paired devices.
IIUC for read/write characteristics, one is supposed to set the
"encrypt-read/write" org.bluez.GattCharacteristic1 "Flags" property, and
for notify/indicate characteristics the CCCD needs to have the
"encrypt-write" flags set instead. Is this correct?
The CCCD for a characteristic is apparently automatically generated by
bluez, so how is one supposed to override that? I tried to add a CCCD
manually to the example-gatt-server, like this:
class ClientCharacteristicConfigurationDescriptor(Descriptor):
CCCD_UUID = '2902'
def __init__(self, bus, index, characteristic):
self.value = [dbus.Byte(0), dbus.Byte(0)]
Descriptor.__init__(self, bus, index, self.CCCD_UUID,
['read', 'encrypt-write'], characteristic)
def ReadValue(self, options):
return self.value
def WriteValue(self, value, options):
self.value = value
But that didn't seem to work.
On that note, I wasn't really able to find documentation about those
flags (e.g. the difference between "encrypt-read",
"encrypt-authenticated-read", and "secure-read"). I assume these map
directly to some bluetooth specifications, which I have to admit not
knowing much about. But I was hoping to find some application developer
guidelines or similar publicly available documents, and not having to
study some long complicated specification first.
Any hints would be much appreciated.
Thanks,
--
Zeno Endemann | zeno.endemann@xxxxxxxx | Software Engineer
KDAB (Deutschland) GmbH, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt Experts
