Hello,
I attempting to get the advertising data from a commercially available
sensor device using the DBus API.
The sensor device gives different manufacturer data depending if the
event type is ADV_IND or SCAN_RSP, as you can see below in the btmon
output.
With DBus I am subscribing to the InterfacesAdded signal which
triggers when the device has been found. However, it only seems to
give me the information for the SCAN_RSP.
If I subscribe to the PropertiesChanged signal on the device, that is
also only giving the data from the SCAN_RSP event.
How do I access both types of data with the DBus API?
Thanks,
Barry
$ bluetoothctl -v
bluetoothctl: 5.50
btmon output for sensor device:
> HCI Event: LE Meta Event (0x3e) plen 43 #1969 [hci0] 740.157687
LE Advertising Report (0x02)
Num reports: 1
Event type: Connectable undirected - ADV_IND (0x00)
Address type: Random (0x01)
Address: DC:76:F7:E1:62:E0 (Static)
Data length: 31
Flags: 0x06
LE General Discoverable Mode
BR/EDR Not Supported
Company: Blue Maestro Limited (307)
Data: 1b640e10010400e701a527f50100
Name (complete): DC76F7E1
RSSI: -44 dBm (0xd4)
> HCI Event: LE Meta Event (0x3e) plen 41 #1970 [hci0] 740.158684
LE Advertising Report (0x02)
Num reports: 1
Event type: Scan response - SCAN_RSP (0x04)
Address type: Random (0x01)
Address: DC:76:F7:E1:62:E0 (Static)
Data length: 29
Company: Blue Maestro Limited (307)
Data: 27fd27f227ea0000010201b600e4017100f4018c0000000000
RSSI: -44 dBm (0xd4)
@ MGMT Event: Device Found (0x0012) plen 74
{0x0002} [hci0] 740.158704
LE Address: DC:76:F7:E1:62:E0 (Static)
RSSI: -44 dBm (0xd4)
Flags: 0x00000000
Data length: 60
Flags: 0x06
LE General Discoverable Mode
BR/EDR Not Supported
Company: Blue Maestro Limited (307)
Data: 1b640e10010400e701a527f50100
Name (complete): DC76F7E1
Company: Blue Maestro Limited (307)
Data: 27fd27f227ea0000010201b600e4017100f4018c0000000000
@ MGMT Event: Device Found (0x0012) plen 74
{0x0001} [hci0] 740.158704
LE Address: DC:76:F7:E1:62:E0 (Static)
RSSI: -44 dBm (0xd4)
Flags: 0x00000000
Data length: 60
Flags: 0x06
LE General Discoverable Mode
BR/EDR Not Supported
Company: Blue Maestro Limited (307)
Data: 1b640e10010400e701a527f50100
Name (complete): DC76F7E1
Company: Blue Maestro Limited (307)
Data: 27fd27f227ea0000010201b600e4017100f4018c0000000000
Device information from the InterfacesAdded DBus signal:
{'Adapter': '/org/bluez/hci0',
'Address': 'DC:76:F7:E1:62:E0',
'AddressType': 'random',
'Alias': 'DC76F7E1',
'Blocked': False,
'Connected': False,
'LegacyPairing': False,
'ManufacturerData': {307: [39, 253, 39, 242, 39, 234, 0, 0, 1, 2, 1,
182, 0, 228, 1, 113, 0, 244,1, 140, 0, 0, 0, 0, 0]},
'Name': 'DC76F7E1',
'Paired': False,
'RSSI': -51,
'ServicesResolved': False,
'Trusted': False,
'UUIDs': []}
Looking at the propertiesChanged signal on the device, it is also only
showing the same manufacturer data:
org.bluez.Device1 {'RSSI': -45, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
org.bluez.Device1 {'RSSI': -52, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
org.bluez.Device1 {'RSSI': -54, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
org.bluez.Device1 {'RSSI': -45, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
org.bluez.Device1 {'RSSI': -54, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
org.bluez.Device1 {'RSSI': -52, 'ManufacturerData': {307: [39, 253,
39, 242, 39, 234, 0, 0, 1, 2, 1, 182, 0, 228, 1, 113, 0, 244, 1, 140,
0, 0, 0, 0, 0]}} []
