[Bluez-devel] Bluetooth Power Modes

[Bluez-devel] Bluetooth Power Modes

[Williams, Richard]

Hi,

I'm working on an embedded system, with a USB Bluetooth dongle. This is =
a battery operated
system, so power consumption is very important to me.

Does BlueZ support the Bluetooth low-power modes, such as Park and Sniff =
?

If I have a Bluetooth dongle in my USB port, and I turn off the BlueZ =
stack by using
"/etc/rc.d/init.d/bluetooth stop"  which then does an "hciconfig hci0 =
down" the Bluetooth dongle
is not powered down. (The Blue LED inside the dongle is still blinking.) =
Is this a function of
the Bluetooth stack or is this a USB responsibility ?

thanks,

Rich


Richard B. Williams
Vitronics, Inc.
An MTC Technologies Company
3 Corbett Way
Eatontown, NJ 07724-2262
732-389-0244 x29
Richard.Williams@vitronics.com



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Re: [Bluez-devel] Bluetooth Power Modes

[Marcel Holtmann]

Hi Richard,

> I'm working on an embedded system, with a USB Bluetooth dongle. This is a battery operated
> system, so power consumption is very important to me.
> 
> Does BlueZ support the Bluetooth low-power modes, such as Park and Sniff ?

all of them are supported, but you have to call the HCI commands for it
by yourself.

I still have the automatic-sniff-mode feature on my todo list, but don't
expect this very soon. I have other stuff that must be done first.

> If I have a Bluetooth dongle in my USB port, and I turn off the BlueZ stack by using
> "/etc/rc.d/init.d/bluetooth stop"  which then does an "hciconfig hci0 down" the Bluetooth dongle
> is not powered down. (The Blue LED inside the dongle is still blinking.) Is this a function of
> the Bluetooth stack or is this a USB responsibility ?

Maybe a reset of the device helps here, but I am not sure.

Regards

Marcel




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