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List:       linux-bluetooth
Subject:    Re: Receiving data in BLE non-connectable undirected advertisements
From:       Adam Warski <adam () warski ! org>
Date:       2014-02-28 15:13:31
Message-ID: 00B030ED-78C3-4C48-B738-4161348CD6E8 () warski ! org
[Download RAW message or body]

If you want to see the raw advertisement packets, run:

1st terminal: hcidump -R
2nd terminal: hcitool lescan

The raw dump will contain the advertisement data.

Adam

On 28 Feb 2014, at 16:00, Benjamin Adler <benadler@gmx.net> wrote:

> Hello bluez,
> 
> as the subject notes, I'm trying to receive non-connectable undirected \
> advertisements from a bluetooth low energy device, namely TI's SensorTag. Their SDK \
> contains a sample app named SimpleBLEBroadcaster, that, supposedly, sends those \
> advertisements including some data. There is an overview of TI's understanding of \
> this mechanism for download at 
> http://e2e.ti.com/support/low_power_rf/m/videos__files/653593/download.aspx
> 
> Is it possible to receive/display the *data* (up to 31 bytes, I believe) that can \
> be contained in those advertisements using bluez? I currently don't care whether \
> it's a commandline tool, C-based API, python, DBUS, anything. 
> When I start SimpleBLEBroadcaster, btmon alone doesn't show anything, but "hcitool \
> lescan" says. 
> 	LE Scan ...
> 	90:59:AF:0B:8A:7D (unknown)
> 
> The complete output of a btmon during lescan is attached below.
> 
> https://github.com/bmpm/bcast-observer-demos and a script named \
> "test-bluetooth-observer" made me believe that there should be an \
> org.bluez.Observer interface for this, which I couldn't find using qdbusviewer. 
> I asked on #bluez before, but it seems noone knew.
> 
> Thanks!
> ben
> 
> ###################################################################
> 
> ####### start "btmon"
> 
> Bluetooth monitor ver 5.14
> = New Index: 00:02:72:33:29:55 (BR/EDR,USB,hci0)             [hci0] 0.377191
> 
> ####### start "hcitool lescan" in another shell
> 
> < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7   [hci0] 4.457403
> Type: Active (0x01)
> Interval: 10.000 msec (0x0010)
> Window: 10.000 msec (0x0010)
> Own address type: Public (0x00)
> Filter policy: Accept all advertisement (0x00)
> > HCI Event: Command Complete (0x0e) plen 4                  [hci0] 4.458949
> LE Set Scan Parameters (0x08|0x000b) ncmd 1
> Status: Success (0x00)
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2       [hci0] 4.459094
> Scanning: Enabled (0x01)
> Filter duplicates: Enabled (0x01)
> > HCI Event: Command Complete (0x0e) plen 4                  [hci0] 4.459957
> LE Set Scan Enable (0x08|0x000c) ncmd 1
> Status: Success (0x00)
> 
> ####### Power-on the SensorTag
> 
> > HCI Event: LE Meta Event (0x3e) plen 20                    [hci0] 9.481376
> LE Advertising Report (0x02)
> Num reports: 1
> Event type: Non connectable undirected - ADV_NONCONN_IND (0x03)
> Address type: Public (0x00)
> Address: 90:59:AF:0B:8A:7D (Texas Instruments)
> Data length: 8
> Flags: 0x04
> BR/EDR Not Supported
> Company: not assigned (513)
> Data: 03
> RSSI: -80 dBm (0xb0)
> 
> ####### Quit hcitool
> 
> < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2      [hci0] 20.647504
> Scanning: Disabled (0x00)
> Filter duplicates: Enabled (0x01)
> > HCI Event: Command Complete (0x0e) plen 4                 [hci0] 20.650124
> LE Set Scan Enable (0x08|0x000c) ncmd 1
> Status: Success (0x00)
> 
> #
> 
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-- 
Adam Warski

http://twitter.com/#!/adamwarski
http://www.softwaremill.com
http://www.warski.org

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