Hi Alon, On Wed, Mar 25, 2015 at 4:21 PM, Alon Ziv <nolaviz@xxxxxxxxxx> wrote: > Hi all, > > We are developing some applications with non-connectable BLE > advertisers that broadcast data in a "service data" element of the > advertisement packet. So far we have used these devices with Android > and with iOS, both of which can easily support these devices as the > entire advertisement packet payload is exposed to scanning > applications. > > Looking at the bluez DBus API, it appears that no equivalent > functionality exists: in particular, when the advertisement packets > are parsed (eir_parse() called from > src/adapter.c:update_found_devices()) any service-data elements are > simply discarded. Even worse (for us), if the devices' advertisements > are not marked "discoverable" they are simply dropped outright. And > even if the device is discoverable, it looks like we'd get only a > single notification when the device is first seen - but we won't be > able to verify it is still in range (i.e. continued reception of > advertisement packets). > > Is the above summarization correct? We working on adding advertising support right, perhaps you should take a look at my proposal: [RFC BlueZ] doc/device-api: Add ServiceData and ManufacturerData Do expect the service data to change frequently? I guess we are programming the controller to filter duplicates, but we are working (actually most of the work is coming from your colleague Jakub Pawlowski) SetDiscoveryFilter: https://git.kernel.org/cgit/bluetooth/bluez.git/tree/doc/adapter-api.txt > (The API documentation claims to support "observer" mode, but these > limitations actually put the lie to this statement - an observer is > supposed to see _all_ advertisement packets, including non-first ones > and those from non-discoverable devices...) > > Regards > -- Alon Ziv > -- > To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Luiz Augusto von Dentz -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
