Bluetooth speed - a problem?

Posted: 10-09-2004, 04:47 AM

Denali Nicholson

Posts: n/a

Hi Everyone,

I am new to this group. I am building an embedded device which
communicates with a PC for a school project. Initially, I planned on using a
radio transmitter and building the circuits for this myself on the
breadboard. Then, I decided this was too complex and outside the scope of my
project - I want to focus on processing the actual data rather than how to
send it to another computer.
I am really leaning towards using a Bluetooth serial module and attaching
it to the microchip and then just buying a Bluetooth USB adapter for my PC.
I am wondering about one important factor - in real life, has anyone had a
problem with the speed of the Bluetooth protocol? Initially, I will be
sending very small amounts of data - maybe 16 bits every 2 or 3 seconds -
but I want to be able to send more later - up to 40 kbps. The specifications
I've read from various vendors for the module and the USB adaptors claim
high rates, around 723 kbps for asymmetrical transfers. But, I've seen a few
posts from people complaining about how some devices are really quite slow.
I wanted to get some more input before I invest in the Bluetooth solution.
Has anyone had any issues with speed?

Thank you for comments or feedback!
-Denali

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Responses to "Bluetooth speed - a problem?"

Mauricio Freitas

Posts: n/a

Re: Bluetooth speed - a problem?

Posted: 10-09-2004, 05:46 AM

"Denali Nicholson" <denalinicholson@gmail.com> wrote in message
news:xpednYFcp6r-wvrcRVn-oA@speakeasy.net...
> Hi Everyone,
>
> I am new to this group. I am building an embedded device which
> communicates with a PC for a school project. Initially, I planned on using
> a radio transmitter and building the circuits for this myself on the
> breadboard. Then, I decided this was too complex and outside the scope of
> my project - I want to focus on processing the actual data rather than how
> to send it to another computer.
> I am really leaning towards using a Bluetooth serial module and attaching
> it to the microchip and then just buying a Bluetooth USB adapter for my
> PC. I am wondering about one important factor - in real life, has anyone
> had a problem with the speed of the Bluetooth protocol? Initially, I will
> be sending very small amounts of data - maybe 16 bits every 2 or 3
> seconds - but I want to be able to send more later - up to 40 kbps. The
> specifications I've read from various vendors for the module and the USB
> adaptors claim high rates, around 723 kbps for asymmetrical transfers.
> But, I've seen a few posts from people complaining about how some devices
> are really quite slow. I wanted to get some more input before I invest in
> the Bluetooth solution. Has anyone had any issues with speed?
>
> Thank you for comments or feedback!
> -Denali

Devices will be slow, depending on implementation and use. For example "my
connection to the internet via my mobile phone connected over Bluetooth is
slow" is pretty much easy to translate to "GPRS can only go up to 46kbps in
real life, and that's what I'll get regardless of using Bluetooth, IR, USB
or any other connection".

For example, I understand older Pocket PC devices had a UART interface to
Bluetooth, which will max it to 115kbps regardless of how fast Bluetooth can
be...

All implementation, really.

--
Mauricio Freitas, Microsoft MVP Mobile Devices
Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
Geekzone Software Store: http://www.geekzone.co.nz/store
Our RSS feeds give you up to date information on new software as soon as
they're available: http://www.geekzone.co.nz/content.asp?contentid=3344

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Andrea Iamesi

Posts: n/a

Re: Bluetooth speed - a problem?

Posted: 10-18-2004, 11:49 PM

I destroyed my USB bluetooth dongle wich I used to connect to my Nokia 6230
with EDGE; it was amazing to surf at real 200 kbps!

I replaced the dongle with a conceptronics CF Buetooth and the speed of my
surfing is now less than 100 kbps (the phone and the card are one aside the
other).

With an infrared connection the speed return to the "normal" 200 kpbs.

Any idea?

thanks

"Mauricio Freitas" <dr.emailposter@nowhere.invalid> wrote in message
news:H0K9d.7211$mZ2.626639@news02.tsnz.net...
> "Denali Nicholson" <denalinicholson@gmail.com> wrote in message
> news:xpednYFcp6r-wvrcRVn-oA@speakeasy.net...
>> Hi Everyone,
>>
>> I am new to this group. I am building an embedded device which
>> communicates with a PC for a school project. Initially, I planned on
>> using a radio transmitter and building the circuits for this myself on
>> the breadboard. Then, I decided this was too complex and outside the
>> scope of my project - I want to focus on processing the actual data
>> rather than how to send it to another computer.
>> I am really leaning towards using a Bluetooth serial module and
>> attaching it to the microchip and then just buying a Bluetooth USB
>> adapter for my PC. I am wondering about one important factor - in real
>> life, has anyone had a problem with the speed of the Bluetooth protocol?
>> Initially, I will be sending very small amounts of data - maybe 16 bits
>> every 2 or 3 seconds - but I want to be able to send more later - up to
>> 40 kbps. The specifications I've read from various vendors for the module
>> and the USB adaptors claim high rates, around 723 kbps for asymmetrical
>> transfers. But, I've seen a few posts from people complaining about how
>> some devices are really quite slow. I wanted to get some more input
>> before I invest in the Bluetooth solution. Has anyone had any issues with
>> speed?
>>
>> Thank you for comments or feedback!
>> -Denali
>
> Devices will be slow, depending on implementation and use. For example "my
> connection to the internet via my mobile phone connected over Bluetooth is
> slow" is pretty much easy to translate to "GPRS can only go up to 46kbps
> in real life, and that's what I'll get regardless of using Bluetooth, IR,
> USB or any other connection".
>
> For example, I understand older Pocket PC devices had a UART interface to
> Bluetooth, which will max it to 115kbps regardless of how fast Bluetooth
> can be...
>
> All implementation, really.
>
> --
> Mauricio Freitas, Microsoft MVP Mobile Devices
> Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
> Geekzone Software Store: http://www.geekzone.co.nz/store
> Our RSS feeds give you up to date information on new software as soon as
> they're available: http://www.geekzone.co.nz/content.asp?contentid=3344
>

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Mauricio Freitas

Posts: n/a

Re: Bluetooth speed - a problem?

Posted: 10-19-2004, 02:50 AM

In some drivers the connection speed is actually limited by a UART used to
plug the serial adapter and DUN profile. Perhaps this ios affecting the CF
card, and not the Bluetooth USB? You can open the Control Panel, Modems,
Properties and check the maximum speed your Bluetooth Modem is allowed on
this system...

--
Mauricio Freitas, Microsoft MVP Mobile Devices
Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
Geekzone Software Store: http://www.geekzone.co.nz/store
Our RSS feeds give you up to date information on new software as soon as
they're available: http://www.geekzone.co.nz/content.asp?contentid=3344

"Andrea Iamesi" <aiamesi@hotmail.com> wrote in message
news:2tivmiF214ouqU1@uni-berlin.de...
>I destroyed my USB bluetooth dongle wich I used to connect to my Nokia
>6230 with EDGE; it was amazing to surf at real 200 kbps!
>
> I replaced the dongle with a conceptronics CF Buetooth and the speed of my
> surfing is now less than 100 kbps (the phone and the card are one aside
> the other).
>
> With an infrared connection the speed return to the "normal" 200 kpbs.
>
> Any idea?
>
> thanks
>
>
> "Mauricio Freitas" <dr.emailposter@nowhere.invalid> wrote in message
> news:H0K9d.7211$mZ2.626639@news02.tsnz.net...
>> "Denali Nicholson" <denalinicholson@gmail.com> wrote in message
>> news:xpednYFcp6r-wvrcRVn-oA@speakeasy.net...
>>> Hi Everyone,
>>>
>>> I am new to this group. I am building an embedded device which
>>> communicates with a PC for a school project. Initially, I planned on
>>> using a radio transmitter and building the circuits for this myself on
>>> the breadboard. Then, I decided this was too complex and outside the
>>> scope of my project - I want to focus on processing the actual data
>>> rather than how to send it to another computer.
>>> I am really leaning towards using a Bluetooth serial module and
>>> attaching it to the microchip and then just buying a Bluetooth USB
>>> adapter for my PC. I am wondering about one important factor - in real
>>> life, has anyone had a problem with the speed of the Bluetooth protocol?
>>> Initially, I will be sending very small amounts of data - maybe 16 bits
>>> every 2 or 3 seconds - but I want to be able to send more later - up to
>>> 40 kbps. The specifications I've read from various vendors for the
>>> module and the USB adaptors claim high rates, around 723 kbps for
>>> asymmetrical transfers. But, I've seen a few posts from people
>>> complaining about how some devices are really quite slow. I wanted to
>>> get some more input before I invest in the Bluetooth solution. Has
>>> anyone had any issues with speed?
>>>
>>> Thank you for comments or feedback!
>>> -Denali
>>
>> Devices will be slow, depending on implementation and use. For example
>> "my connection to the internet via my mobile phone connected over
>> Bluetooth is slow" is pretty much easy to translate to "GPRS can only go
>> up to 46kbps in real life, and that's what I'll get regardless of using
>> Bluetooth, IR, USB or any other connection".
>>
>> For example, I understand older Pocket PC devices had a UART interface to
>> Bluetooth, which will max it to 115kbps regardless of how fast Bluetooth
>> can be...
>>
>> All implementation, really.
>>
>> --
>> Mauricio Freitas, Microsoft MVP Mobile Devices
>> Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
>> Geekzone Software Store: http://www.geekzone.co.nz/store
>> Our RSS feeds give you up to date information on new software as soon as
>> they're available: http://www.geekzone.co.nz/content.asp?contentid=3344
>>
>
>

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Andrea Iamesi

Posts: n/a

Re: Bluetooth speed - a problem?

Posted: 10-19-2004, 09:21 PM

With the Bluetooth USB no problem.

The maximum speed for the bluetooth modem with the CF card is 115200 bps. I
tried to use the Nokia 6230 bluetooth modem driver wich has a maximum speed
of of 460800 bps but the maximu throughput I obtain is the same 10 KBps.
Any idea?

Thanks

"Mauricio Freitas" <dr.emailposter@nowhere.invalid> wrote in message
news:ip_cd.12338$mZ2.756549@news02.tsnz.net...
> In some drivers the connection speed is actually limited by a UART used to
> plug the serial adapter and DUN profile. Perhaps this ios affecting the CF
> card, and not the Bluetooth USB? You can open the Control Panel, Modems,
> Properties and check the maximum speed your Bluetooth Modem is allowed on
> this system...
>
> --
> Mauricio Freitas, Microsoft MVP Mobile Devices
> Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
> Geekzone Software Store: http://www.geekzone.co.nz/store
> Our RSS feeds give you up to date information on new software as soon as
> they're available: http://www.geekzone.co.nz/content.asp?contentid=3344
>
>
>
> "Andrea Iamesi" <aiamesi@hotmail.com> wrote in message
> news:2tivmiF214ouqU1@uni-berlin.de...
>>I destroyed my USB bluetooth dongle wich I used to connect to my Nokia
>>6230 with EDGE; it was amazing to surf at real 200 kbps!
>>
>> I replaced the dongle with a conceptronics CF Buetooth and the speed of
>> my surfing is now less than 100 kbps (the phone and the card are one
>> aside the other).
>>
>> With an infrared connection the speed return to the "normal" 200 kpbs.
>>
>> Any idea?
>>
>> thanks
>>
>>
>> "Mauricio Freitas" <dr.emailposter@nowhere.invalid> wrote in message
>> news:H0K9d.7211$mZ2.626639@news02.tsnz.net...
>>> "Denali Nicholson" <denalinicholson@gmail.com> wrote in message
>>> news:xpednYFcp6r-wvrcRVn-oA@speakeasy.net...
>>>> Hi Everyone,
>>>>
>>>> I am new to this group. I am building an embedded device which
>>>> communicates with a PC for a school project. Initially, I planned on
>>>> using a radio transmitter and building the circuits for this myself on
>>>> the breadboard. Then, I decided this was too complex and outside the
>>>> scope of my project - I want to focus on processing the actual data
>>>> rather than how to send it to another computer.
>>>> I am really leaning towards using a Bluetooth serial module and
>>>> attaching it to the microchip and then just buying a Bluetooth USB
>>>> adapter for my PC. I am wondering about one important factor - in real
>>>> life, has anyone had a problem with the speed of the Bluetooth
>>>> protocol? Initially, I will be sending very small amounts of data -
>>>> maybe 16 bits every 2 or 3 seconds - but I want to be able to send more
>>>> later - up to 40 kbps. The specifications I've read from various
>>>> vendors for the module and the USB adaptors claim high rates, around
>>>> 723 kbps for asymmetrical transfers. But, I've seen a few posts from
>>>> people complaining about how some devices are really quite slow. I
>>>> wanted to get some more input before I invest in the Bluetooth
>>>> solution. Has anyone had any issues with speed?
>>>>
>>>> Thank you for comments or feedback!
>>>> -Denali
>>>
>>> Devices will be slow, depending on implementation and use. For example
>>> "my connection to the internet via my mobile phone connected over
>>> Bluetooth is slow" is pretty much easy to translate to "GPRS can only go
>>> up to 46kbps in real life, and that's what I'll get regardless of using
>>> Bluetooth, IR, USB or any other connection".
>>>
>>> For example, I understand older Pocket PC devices had a UART interface
>>> to Bluetooth, which will max it to 115kbps regardless of how fast
>>> Bluetooth can be...
>>>
>>> All implementation, really.
>>>
>>> --
>>> Mauricio Freitas, Microsoft MVP Mobile Devices
>>> Bluetooth guides: http://www.geekzone.co.nz/content.asp?contentid=449
>>> Geekzone Software Store: http://www.geekzone.co.nz/store
>>> Our RSS feeds give you up to date information on new software as soon as
>>> they're available: http://www.geekzone.co.nz/content.asp?contentid=3344
>>>
>>
>>
>
>

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