SetDiscoveryFilter not working

[chenwq3]

Hello,

Thank you for developing the python Bluetooth LE library.
I'm trying to learn Bluetooth, and I am testing a dwm1001-dev device.

It uuid is 680c21d9-c946-4c1f-9c11-baa1c21329e7, I check for many times.

Here is my debugging code:

#!/usr/bin/env python3
import dbus
import gatt

class DeviceManager(gatt.DeviceManager):
    def device_discovered(self,device):
        print("Discovered [%s] %s" %
             (device.mac_address, device.alias()))

if __name__ == '__main__':
    manager = DeviceManager(adapter_name='hci0')
    list = manager._adapter.GetDiscoveryFilters()
    uuid = '680c21d9-c946-4c1f-9c11-baa1c21329e7'
    print(list)
    print(list[0])
    print(list[1])
    print(list[2])
    print(list[3])
    print(list[4])
    if False:
       manager.start_discovery([uuid])
    else:
        if False:
            manager._adapter.SetDiscoveryFilter({
                dbus.String("UUIDs"):[dbus.String(uuid)],
                dbus.String("Transport"):dbus.String("le")
                })
        else:
            manager._adapter.SetDiscoveryFilter({
                dbus.String("Transport"):dbus.String("le")
                })
        manager._adapter.StartDiscovery()
    manager.run()
    while True:
        pass

Output: when i set a filter with "UUIDs":['<uuid>'], it can't not discovery any devices.

device: Raspberry Pi B2
Bluetooth dongle: Bus 001 Device 004: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

version:

$ bluetoothd --version
5.48
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04 LTS
Release:        18.04
Codename:       bionic

[chenwq3]

#!/usr/bin/env python3
import dbus
import gatt

class DeviceManager(gatt.DeviceManager):
    def device_discovered(self,device):
        print("Discovered [%s] %s" %
             (device.mac_address, device.alias()))

if __name__ == '__main__':
    manager = DeviceManager(adapter_name='hci0')
    uuid = '680c21d9-c946-4c1f-9c11-baa1c21329e7'
    if True:
       manager.start_discovery([uuid])
    else:
        if False:
            manager._adapter.SetDiscoveryFilter({
                dbus.String("UUIDs"):[dbus.String(uuid)],
                })
        else:
            manager._adapter.SetDiscoveryFilter({
                dbus.String("Transport"):dbus.String("le")
                })
        manager._adapter.StartDiscovery()
    manager.run()
    while True:
        pass

Not work at Raspberry Pi 3 with image of mate 16.04.2.(official image).

version

$ bluetoothd  --version
5.41
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial
~$ uname -a
Linux rpi-desktop 4.4.38-v7+ #938 SMP Thu Dec 15 15:22:21 GMT 2016 armv7l armv7l armv7l GNU/Linux