Re: Dynamicall control the maximum or default transmit power

Nope , this is not what I want .will setting the Inquiry Transmit
power change my transmit power level? Well unable to change the inqtpl
using the hcitool as it reverts back exactly like in the
http://permalink.gmane.org/gmane.linux.bluez.kernel/4008.Thanks for
the response though , it inspired me to do more research.
I want to set the max transmit power level of my Bluetooth
transmission which is currently set to 11dbm and the signal drops
after the range of 10 m approx.Acccording to my understanding I should
be able to raise the signal stength to 20dbm as per the Bluetooth chip
datasheet and I should be able to get the bluetooth to work in the
100m range distance.

Been through the hciconfig and hcitool very carefully but not a
solution to this over there.
bccmd is not the answer as this is for CSR chips only not mine which
is broadcom 4329. rfkill is only to enable and disable to transmitter.

Then looking through the code is the only solution . If anyone has a
idea , Plz suggest.

Regards
Vaishali

On Fri, Sep 23, 2011 at 10:30 AM, Vaishali D [off-list ref] wrote:

Thank you , Keren.
Thank you.
Regards
Vaishali

On Thu, Sep 22, 2011 at 8:17 PM, Keren, Doron [off-list ref] wrote:

quoted

Hi,

Regarding the bccmd it is CSR transport (BlueCore Command).
BlueCore is CSR chip.

You can use hcitool and send what u need.

HCI_Write_Inquiry_Transmit_Power_Level, ocf = 0x0059, ogf = 0x01
#hcitool cmd ...

Most of the vendors distinguish between TX power and Inquiry TX power.
You can also read the value in HCI_Read_Inquiry...

BR,
Doron

quoted

-----Original Message-----
From: linux-bluetooth-owner@vger.kernel.org [mailto:linux-bluetooth-
owner@vger.kernel.org] On Behalf Of Vaishali Dhakate
Sent: Thursday, September 22, 2011 10:31 AM
To: linux-bluetooth@vger.kernel.org
Subject: Dynamicall control the maximum or default transmit power

From: Ed Tsang <redacted>
Subject: Dynamicall control the maximum or default transmit power
Newsgroups: gmane.linux.bluez.kernel
Date: 2009-02-18 20:12:08 GMT (2 years, 30 weeks, 4 days, 23 hours and
16 minutes ago)

Hi, I am looking at possibility of dynamically control the maximum or
default transmit power.
   Basically I would like to change the transmit power level during
inquiry. So I could kind of dynamically
control the physical range of devices that I see. In CSR's Bluecore
chip, I think there are pskey that

stored the maximum and default transmit power. And there seem to be
bccmd psget 0x0017 to get the value.
  Now my problem is I am using a class 1 dongle using Broadcom
chipset. Is there a way to dynamically control the

default or maximum transmit power e.g.
   hcitool cmd 0x.. 0x.. ..... ?

   During the inquiry paging, does anyone know if they use default or
maximum transmit power?

Thanks,
Edwin



Regarding this.
I also have the same question I am trying to find answer to ? Want to
know if you found the answer. I see three ways of doing this.
1)In the bcm4329 code
2)using bccmd
3)using hcitool cmd 0x0 0x0..

Going through the code can be time consuming And I ll have to go to
the theory before I start, Already scimmed through it to see if there
is any power control or anything like utility for hw control in the
driver , in the drivers/net/wireless/bcm4329 ..

I compiled bccmd , But this doesnot support some chips like mine
bcm4329 , the bccmd is for CSR chips ,Plz correct me , Mine is not
working on the phone. Maybe I ll have to take a clue from the bccmd
tool to write my own or check in the code where these pskeys will be.
So far I can surmise they are soemwhere in the eeprom. Also this phy.c
has some reference to power tables. Need to look carefully.

Next hcitool is the option. hcitool I ll look into the ogf and ocf
commands in the LMP specifications that I can send, havent tried this.
Tell me how did you do it.

Just thought I ll send you a mail,if you could plz share your
experience regarding this.

Regards
Vaishali
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