Re: LEAdvertisement interface on older kernels

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Hi,

If you have access to Artik 5 kernel 3.10.93 source, you could:
1. recompile that kernel with all Bluetooth components disabled
2. use Linux backports to pick up the latest Bluetooth kernel core and
drivers as a loadable module
    http://drvbp1.linux-foundation.org/~mcgrof/rel-html/backports/

Thanks for the suggestion! I have compiled Backports 4.4.2-1 against
the Artik 5 kernel 3.10.93, and tried to run my application using
Bluez 5.43.  It does advance further than before, but the Bluetooth
daemon dies when I try to register a BLE advertisement (see the log
below).  Moreover, on the phone side I am able to see the newly
registered service, though I am of course unable to connect to it.

Note that running lsmod confirms that the backported BT modules
are loaded instead of their 3.10.93 counterparts.

Anyway, do you reckon this issue is fixable, or should I instead
shift my efforts to BT Classic?

Thanks in advance for your attention!
Best regards,
Dario Teixeira


Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:manager_register_app() Registering application: :1.14:/com/company/app Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:proxy_added_cb() Object received: /com/company/app/svc0, iface: org.bluez.GattService1 Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:proxy_added_cb() Object received: /com/company/app/svc0/chr0, iface: org.bluez.GattCharacteristic1 Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:proxy_added_cb() Object received: /com/company/app/svc0/chr1, iface: org.bluez.GattCharacteristic1 Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:gatt_db_service_added() GATT Service added to local database Jan 22 14:30:32 localhost bluetoothd[2249]: src/gatt-database.c:client_ready_cb() GATT application registered: :1.14:/com/company/app Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:register_advertisement() RegisterAdvertisement Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:advertisement_create() Adding proxy for /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:register_advertisement() Registered advertisement at path /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:parse_advertising_service_uuids() Adding ServiceUUID: b228c495-11be-4f20-9b7b-a93e2f4cf380 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:refresh_advertisement() Refreshing advertisement: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:parse_advertising_service_uuids() Adding ServiceUUID: b228c495-11be-4f20-9b7b-a93e2f4cf380 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:refresh_advertisement() Refreshing advertisement: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:parse_advertising_service_uuids() Adding ServiceUUID: b228c495-11be-4f20-9b7b-a93e2f4cf380 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:refresh_advertisement() Refreshing advertisement: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:parse_advertising_service_uuids() Adding ServiceUUID: b228c495-11be-4f20-9b7b-a93e2f4cf380 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:refresh_advertisement() Refreshing advertisement: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:add_advertising_callback() Advertisement registered: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: src/advertising.c:add_advertising_callback() Advertisement registered: /com/company/app/adv0 Jan 22 14:30:32 localhost bluetoothd[2249]: process 2249: arguments to dbus_message_new_method_return() were incorrect, assertion "method_call != NULL" failed in file dbus-message.c line 1378. Jan 22 14:30:32 localhost bluetoothd[2249]: This is normally a bug in some application using the D-Bus library. Jan 22 14:30:32 localhost bluetoothd[2249]: D-Bus not built with -rdynamic so unable to print a backtrace Jan 22 14:30:32 localhost systemd[1]: bluetooth.service: main process exited, code=dumped, status=6/ABRT Jan 22 14:30:32 localhost systemd[1]: Unit bluetooth.service entered failed state.
Jan 22 14:30:32 localhost systemd[1]: bluetooth.service failed.
Jan 22 14:30:33 localhost systemd-coredump[2373]: Process 2249 (bluetoothd) of user 0 dumped core. Stack trace of thread 2249: #0 0x00000000b6c176f0 raise (libc.so.6)

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