programming/comunicating with bluetooth wirless rs232 device

colin · Joined: 27 Sep 2007 Posts: 5

Hi,
I have a LMT058 bluetooth wireless rs232 device
wich is to allow a small microcontroller to talk to the PC over a short
distance,
with a bluetooth dongle connected to the PC with WIDCOMM software 5.1.0
and winxp sp2. the rs232 device is set up as a slave, as devb on com15.

I can set it up to work, however it occasionally stops working after a
while,
sometimes closing and re opening the com port in software starts it working
again,
however sometimes I need to switch off either the bluetooth rs232 device
or unplug the dongle on the PC, or sometimes both.

sometimes the rs232 device still thinks its connected
and the software takes ages to reopen the com port,
when it does open it theres no comunication.

unplugging the dongle or the rs232 device clears the conection and
allows it to work again (usually).

while it is hung up the widdcom software is unable to open the connection by
clicking on the devb icon.

how can I clear the connection so it starts to work again ?
the system is left 24hrs a day and I cant be there to do it manually.

its realy annoying becuase I need many complete days of data and I
find its not been gathering data for a few hours and days of collecting data
have been wasted Sad

im programing with c# and just opening the com15 port as if it was a normal
rs232 port.

any help would be realy appreciated thanks,
Colin =^.^=

Archived from group: alt>cellular>bluetooth

colin · Joined: 27 Sep 2007 Posts: 5

"John Henderson" wrote in message @mid.individual.net...
> colin wrote:
>
>> Hi,
>> I have a LMT058 bluetooth wireless rs232 device
>> wich is to allow a small microcontroller to talk to the PC
>> over a short distance, with a bluetooth dongle connected to
>> the PC with WIDCOMM software 5.1.0 and winxp sp2. the rs232
>> device is set up as a slave, as devb on com15.
>>
>> I can set it up to work, however it occasionally stops working
>> after a while, sometimes closing and re opening the com port
>> in software starts it working again, however sometimes I need
>> to switch off either the bluetooth rs232 device or unplug the
>> dongle on the PC, or sometimes both.
>>
>> sometimes the rs232 device still thinks its connected
>> and the software takes ages to reopen the com port,
>> when it does open it theres no comunication.
>>
>> unplugging the dongle or the rs232 device clears the conection
>> and allows it to work again (usually).
>>
>> while it is hung up the widdcom software is unable to open the
>> connection by clicking on the devb icon.
>>
>> how can I clear the connection so it starts to work again ?
>> the system is left 24hrs a day and I cant be there to do it
>> manually.
>>
>> its realy annoying becuase I need many complete days of data
>> and I find its not been gathering data for a few hours and
>> days of collecting data have been wasted Sad

>>
>> im programing with c# and just opening the com15 port as if it
>> was a normal rs232 port.
>>
>> any help would be realy appreciated thanks,
>> Colin =^.^=
>
> Instead of your program addressing the LMT058's serial port
> directly on com15, can you interact with the dongle itself with
> "AT" commands? If you can, you've obviously got far more
> control over connection status.
>
> I took a different hardware approach. I use two Bluetooth RS232
> adaptors (a TDK blu2i and a Parani SD100), and talk directly to
> the unit plugged into the PC's serial port. It controls the
> session to the remote unit, and once a session is made I'm then
> communicating with the remote unit's serial port until I drop
> back to local command mode with the standard modem "+++" escape
> sequence (or detect that the connection has been lost).
>
> Both these units seem to have a much more powerful "AT" command
> set than the LMT058, but I'd recommend the Parani as being the
> more bullet-proof of the two (you can set the baud rate with
> DIP switches instead of only via software, for example).
>
> I like talking to serial ports directly - it distances me from
> drivers with bugs Smile

>

thanks,
it seems absurd but the device I have cant be made to drop out with the +++
command.
I can detect 'connect' and 'disconnect' on the remote device
but this isnt entirly helpfull, as it is in connected mode when it isnt
working.

I was hoping not to have to use the pc serial port as im using it for
something else,
and seems they might be becoming obselete on pcs. also buad rate is rather
limited,
I can just get away with ~100kb

il look up those devices you mentioned, I could get another unit like the
one I have
to use rs232 to rs232 as they are suposed to work as pairs,
but if its this device thats cuasing problems il be no better off,
maybe il get one of the devices you seem to be having succes with.

one other thing I havnt tried is to put the remote unit in master mode.

I gues I could control the power to the remote unit from the micro
but this as something id rather not have to.

idealy I would like to be able to just break the connection from the PC
by sending a command to the bluetooth driver,
is this possible ?

Colin =^.^=

John Henderson · Joined: 25 Jul 2007 Posts: 165

colin wrote:

> Hi,
> I have a LMT058 bluetooth wireless rs232 device
> wich is to allow a small microcontroller to talk to the PC
> over a short distance, with a bluetooth dongle connected to
> the PC with WIDCOMM software 5.1.0 and winxp sp2. the rs232
> device is set up as a slave, as devb on com15.
>
> I can set it up to work, however it occasionally stops working
> after a while, sometimes closing and re opening the com port
> in software starts it working again, however sometimes I need
> to switch off either the bluetooth rs232 device or unplug the
> dongle on the PC, or sometimes both.
>
> sometimes the rs232 device still thinks its connected
> and the software takes ages to reopen the com port,
> when it does open it theres no comunication.
>
> unplugging the dongle or the rs232 device clears the conection
> and allows it to work again (usually).
>
> while it is hung up the widdcom software is unable to open the
> connection by clicking on the devb icon.
>
> how can I clear the connection so it starts to work again ?
> the system is left 24hrs a day and I cant be there to do it
> manually.
>
> its realy annoying becuase I need many complete days of data
> and I find its not been gathering data for a few hours and
> days of collecting data have been wasted Sad

>
> im programing with c# and just opening the com15 port as if it
> was a normal rs232 port.
>
> any help would be realy appreciated thanks,
> Colin =^.^=

Instead of your program addressing the LMT058's serial port
directly on com15, can you interact with the dongle itself with
"AT" commands? If you can, you've obviously got far more
control over connection status.

I took a different hardware approach. I use two Bluetooth RS232
adaptors (a TDK blu2i and a Parani SD100), and talk directly to
the unit plugged into the PC's serial port. It controls the
session to the remote unit, and once a session is made I'm then
communicating with the remote unit's serial port until I drop
back to local command mode with the standard modem "+++" escape
sequence (or detect that the connection has been lost).

Both these units seem to have a much more powerful "AT" command
set than the LMT058, but I'd recommend the Parani as being the
more bullet-proof of the two (you can set the baud rate with
DIP switches instead of only via software, for example).

I like talking to serial ports directly - it distances me from
drivers with bugs Smile

John

colin · Joined: 27 Sep 2007 Posts: 5

"John Henderson" wrote in message @mid.individual.net...
> colin wrote:
>
>> Hi,
>> I have a LMT058 bluetooth wireless rs232 device
>> wich is to allow a small microcontroller to talk to the PC
>> over a short distance, with a bluetooth dongle connected to
>> the PC with WIDCOMM software 5.1.0 and winxp sp2. the rs232
>> device is set up as a slave, as devb on com15.
>>
>> I can set it up to work, however it occasionally stops working
>> after a while, sometimes closing and re opening the com port
>> in software starts it working again, however sometimes I need
>> to switch off either the bluetooth rs232 device or unplug the
>> dongle on the PC, or sometimes both.
>>
>> sometimes the rs232 device still thinks its connected
>> and the software takes ages to reopen the com port,
>> when it does open it theres no comunication.
>>
>> unplugging the dongle or the rs232 device clears the conection
>> and allows it to work again (usually).
>>
>> while it is hung up the widdcom software is unable to open the
>> connection by clicking on the devb icon.
>>
>> how can I clear the connection so it starts to work again ?
>> the system is left 24hrs a day and I cant be there to do it
>> manually.
>>
>> its realy annoying becuase I need many complete days of data
>> and I find its not been gathering data for a few hours and
>> days of collecting data have been wasted Sad

>>
>> im programing with c# and just opening the com15 port as if it
>> was a normal rs232 port.
>>
>> any help would be realy appreciated thanks,
>> Colin =^.^=
>
> Instead of your program addressing the LMT058's serial port
> directly on com15, can you interact with the dongle itself with
> "AT" commands? If you can, you've obviously got far more
> control over connection status.
>
> I took a different hardware approach. I use two Bluetooth RS232
> adaptors (a TDK blu2i and a Parani SD100), and talk directly to
> the unit plugged into the PC's serial port. It controls the
> session to the remote unit, and once a session is made I'm then
> communicating with the remote unit's serial port until I drop
> back to local command mode with the standard modem "+++" escape
> sequence (or detect that the connection has been lost).
>
> Both these units seem to have a much more powerful "AT" command
> set than the LMT058, but I'd recommend the Parani as being the
> more bullet-proof of the two (you can set the baud rate with
> DIP switches instead of only via software, for example).
>
> I like talking to serial ports directly - it distances me from
> drivers with bugs Smile

>

Ive made some improvment,
I noticed the rts line was always inactive when the problem arises,
for handshaking I rely on the PC acknowledging the messages,
I hadnt planed on using rts there isnt realy any room for going slow,
I managed a very crude flow control by putting an led from the rts line to
the
rxinput wich has a resistance of 220r

seems to no longer stay in the state with the rts line inactive.

Colin =^.^=

John Henderson · Joined: 25 Jul 2007 Posts: 165

colin wrote:

> Ive made some improvment,
> I noticed the rts line was always inactive when the problem
> arises, for handshaking I rely on the PC acknowledging the
> messages, I hadnt planed on using rts there isnt realy any
> room for going slow, I managed a very crude flow control by
> putting an led from the rts line to the rxinput wich has a
> resistance of 220r

I notice that the default for the LMT058 is to use CTS/RTS
hardware flow control. You can disable it with the "ATC0"
(that's the number zero) command issued over its serial port
according to
http://www.datasoft.se/documents/LMT058Usersmanualver2.1_000.pdf

But you're likely to suffer data corruption (loss) without flow
control is the line speed is fast and more characters are
transmitted than will fit into the receiver's buffer. The
slower you can run the line speed the less likely it is that
characters will be lost with flow control turned off.

Wiring RTS high to the LMT058 would have the same effect as
using "ATC0".

If you're going this way, I'd recommend disabling flow control
on your com15 too.

> seems to no longer stay in the state with the rts line
> inactive.

I'm not sure what you're saying here.

John

colin · Joined: 27 Sep 2007 Posts: 5

"John Henderson" wrote in message @mid.individual.net...
> colin wrote:
>
>> Ive made some improvment,
>> I noticed the rts line was always inactive when the problem
>> arises, for handshaking I rely on the PC acknowledging the
>> messages, I hadnt planed on using rts there isnt realy any
>> room for going slow, I managed a very crude flow control by
>> putting an led from the rts line to the rxinput wich has a
>> resistance of 220r
>
> I notice that the default for the LMT058 is to use CTS/RTS
> hardware flow control. You can disable it with the "ATC0"
> (that's the number zero) command issued over its serial port
> according to
> http://www.datasoft.se/documents/LMT058Usersmanualver2.1_000.pdf
>
> But you're likely to suffer data corruption (loss) without flow
> control is the line speed is fast and more characters are
> transmitted than will fit into the receiver's buffer. The
> slower you can run the line speed the less likely it is that
> characters will be lost with flow control turned off.
>
> Wiring RTS high to the LMT058 would have the same effect as
> using "ATC0".

yeah thanks, but it didnt seem to have that command in the manual im lookin
at,
(v2.00) so I just wired cts high and ignored rts.

> If you're going this way, I'd recommend disabling flow control
> on your com15 too.

im not sure what the pc end does with flow hw control
as its via the bluetooth dongle, I cld play around with this
if it still gives trouble, but for now it seems to have solved this
last problem.

I think I just have it set so the hw flow control output lines are asserted
but the flow control inputs lines are ignored.

>
>> seems to no longer stay in the state with the rts line
>> inactive.
>
> I'm not sure what you're saying here.

well, when it went wrong the rts line was de asserted,
and reading all the characters available at the pc didnt
clear the condition and didnt re assert rts,
anything I did at the pc end didnt clear it,
and it just stayed connected.

hmm maybe the confusion is im never clear wich direction rts/cts are going
in,
despite wiring up rs232 conections 100s of times,
we seem to be using oposite directions,
but going by the manual rts is an output from the modem,
I usualy just go by wether the manual says is input or output.

I think it messed it up when it got many more characters when rts was
inactive.
idealy it should just ignore any more chars,
and recover gracefully, but this doesnt seem to be the case.

the messages are short packets of 25chars avg csv (comma seperated
variables).

the remote device isnt realy capable of buffering much so the data logging
eqpmnt just simply has to keep up.
it does usually, seems to be when I stop the data loging aplication to debug
it
or some other windows thing suddenly decides to hog the cpu that it hangs
up.

I did have the appp as high priority but under some conditions it could hang
the pc,
particularly sometimes when it trties to open the com15 port and it doesnt
open straight away.
or maybe its garbage collection in my c# app hmmm ...

the odd missed data packet isnt too much trouble,
but when it hangs up for hours it is.

I had to add crc error detection becuase the microcontroller uart dma has an
intermitent problem where it repeats chars.
but otherwise the system has virtualy no errors

the system is rotating so needs wirless transmision,
but is right next to the pc,
although I wish id used a diferent method,
maybe more slip rings wich I use 2 for power already,
or irda.

what would be realy neat is if I could have a wirless usb conection,
then the usb microcontroller programer could remain on the moving platform.
there are wirless routers wich have usb ports,
but these only claim to support a limited set of printers etc.

anyway thanks again for you help and interest,
seems i might of solved it,
although ive had it apart for the last few days,
there are parts spinning at 10krpm and its
taking a lot of fiddling with to get it running smothly enough.

Colin =^.^=

http://members.lycos.co.u · Joined: 27 Sep 2007 Posts: 9

On Sep 21, 2:36 am, John Henderson wrote:
> colin wrote:
> > Ive made some improvment,
> > I noticed the rts line was always inactive when the problem
> > arises, for handshaking I rely on the PC acknowledging the
> > messages, I hadnt planed on using rts there isnt realy any
> > room for going slow, I managed a very crude flow control by
> > putting an led from the rts line to the rxinput wich has a
> > resistance of 220r
>
> I notice that the default for the LMT058 is to use CTS/RTS
> hardware flow control. You can disable it with the "ATC0"
> (that's the number zero) command issued over its serial port
> according tohttp://www.datasoft.se/documents/LMT058Usersmanualver2.1_000.pdf
>
> But you're likely to suffer data corruption (loss) without flow
> control is the line speed is fast and more characters are
> transmitted than will fit into the receiver's buffer. The
> slower you can run the line speed the less likely it is that
> characters will be lost with flow control turned off.
>
> Wiring RTS high to the LMT058 would have the same effect as
> using "ATC0".
>
> If you're going this way, I'd recommend disabling flow control
> on your com15 too.
>
> > seems to no longer stay in the state with the rts line
> > inactive.
>
> I'm not sure what you're saying here.
>
> John

Hi John,
Hi Colin,

thanks for your very interesting discussion.
My problem with bluetooth gps units is the following.
I use Nokia 770 to connect to a remote bluetooth ghps device to read
nmea sentences by a navigation application.
One option toi select provided by software is scanning for bluetooth
enabled devices.
So I select scan and get a list of bluetooth devices and their
respective mac addreses, than I select one and connect to my gps unit.
Unfortunately, sometimes fix or signal is lost and a software
reconnects.

So sometims I test few gps units and would like my application to
perform scanning, self-selection and
re-select another gps unit given its fix is on .
So to have a number of gps units on and have an application to switch
into discovering mode and select another unit if signal from the first
is lost or no fix is available.

As I see, bluetooth enabled device like gps can be considered a serial
modem and AT commands are valid.
There is a number of application , open-source under Linux to work
with BT gps devices.
But I still can't understand how they work in discovering mode,
discovering every BT gps unit in proximity, reading its mac address.
How scanning is done ?
Thanks for your kind explanations.

Darius

John Henderson · Joined: 25 Jul 2007 Posts: 165

http://members.lycos.co.uk/dariusjack/ wrote:

> thanks for your very interesting discussion.
> My problem with bluetooth gps units is the following.
> I use Nokia 770 to connect to a remote bluetooth ghps device
> to read nmea sentences by a navigation application.
> One option toi select provided by software is scanning for
> bluetooth enabled devices.
> So I select scan and get a list of bluetooth devices and their
> respective mac addreses, than I select one and connect to my
> gps unit. Unfortunately, sometimes fix or signal is lost and a
> software reconnects.
>
> So sometims I test few gps units and would like my application
> to perform scanning, self-selection and
> re-select another gps unit given its fix is on .
> So to have a number of gps units on and have an application to
> switch into discovering mode and select another unit if signal
> from the first is lost or no fix is available.
>
> As I see, bluetooth enabled device like gps can be considered
> a serial modem and AT commands are valid.
> There is a number of application , open-source under Linux to
> work with BT gps devices.
> But I still can't understand how they work in discovering
> mode, discovering every BT gps unit in proximity, reading its
> mac address. How scanning is done ?
> Thanks for your kind explanations.

I don't have any experience so far with connecting to GPS units
and issuing NMEA sentences. But I do have experience with
connecting to Bluetooth-enabled mobile phones.

Below is the log of a session with the Parani SD100, using
minicom (the Linux version of Hyperterminal). I have added
some comments. They are the lines beginning with "*".

I assume that a connection to a GPS unit would be very similiar,
except that NMEA sentences would be issued instead of
cellular-specific "AT" commands.

* start

ATZ

OK

* issue the command to scan for visible devices

AT+BTINQ?

0001E36B52C0,John S55,720204

0016209D8A7C,John V600i,520204

OK

* 2 mobile phones found on this scan - connect to the Siemens
* S55

ATD0001E36B52C0

OK

CONNECT 0001E36B52C0

* from here, we're talking to the S55
*
* issue the phone some commands to tell us the cell ID and
* Location Area Code whenever the phone changes serving cell,
* and also the name (in PDU-mode encoding) of that cell

AT+CREG=2
OK
AT+CNMI=1,0,2,0,1;+CSCB=0,50,"0-15"
OK

+CBM: 88
1B20003201114679785E96371A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
68341A8D46A3D100

* what phone network are we connected to?

AT+COPS?
+COPS: 2,0,"Telstra"

OK
AT+CREG?
+CREG: 2,1,"1030","639E"

OK

+CREG: 1,"1030","1401"

+CBM: 88
07B000320111C8F4F99C76CF418D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
68341A8D46A3D100

+CREG: 1,"1030","639E"

+CBM: 88
1B20003201114679785E96371A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
68341A8D46A3D100
AT+CSQ
+CSQ: 18,99

OK

+CREG: 1,"1030","1401"

+CBM: 88
07B000320111C8F4F99C76CF418D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
68341A8D46A3D100

OK

* give the escape sequence to the Parani to drop back into
* command mode

+++

* now disconnect from the phone

ATH

OK

DISCONNECT

* end

Please note that the Parani and the S55 were previously paired.

John

http://members.lycos.co.u · Joined: 27 Sep 2007 Posts: 9

On Sep 27, 8:24 am, John Henderson wrote:
> http://members.lycos.co.uk/dariusjack/wrote:
> > thanks for your very interesting discussion.
> > My problem with bluetooth gps units is the following.
> > I use Nokia 770 to connect to a remote bluetooth ghps device
> > to read nmea sentences by a navigation application.
> > One option toi select provided by software is scanning for
> > bluetooth enabled devices.
> > So I select scan and get a list of bluetooth devices and their
> > respective mac addreses, than I select one and connect to my
> > gps unit. Unfortunately, sometimes fix or signal is lost and a
> > software reconnects.
>
> > So sometims I test few gps units and would like my application
> > to perform scanning, self-selection and
> > re-select another gps unit given its fix is on .
> > So to have a number of gps units on and have an application to
> > switch into discovering mode and select another unit if signal
> > from the first is lost or no fix is available.
>
> > As I see, bluetooth enabled device like gps can be considered
> > a serial modem and AT commands are valid.
> > There is a number of application , open-source under Linux to
> > work with BT gps devices.
> > But I still can't understand how they work in discovering
> > mode, discovering every BT gps unit in proximity, reading its
> > mac address. How scanning is done ?
> > Thanks for your kind explanations.
>
> I don't have any experience so far with connecting to GPS units
> and issuing NMEA sentences. But I do have experience with
> connecting to Bluetooth-enabled mobile phones.
>
> Below is the log of a session with the Parani SD100, using
> minicom (the Linux version of Hyperterminal). I have added
> some comments. They are the lines beginning with "*".
>
> I assume that a connection to a GPS unit would be very similiar,
> except that NMEA sentences would be issued instead of
> cellular-specific "AT" commands.
>
> * start
>
> ATZ
>
> OK
>
> * issue the command to scan for visible devices
>
> AT+BTINQ?
>
> 0001E36B52C0,John S55,720204
>
> 0016209D8A7C,John V600i,520204
>
> OK
>
> * 2 mobile phones found on this scan - connect to the Siemens
> * S55
>
> ATD0001E36B52C0
>
> OK
>
> CONNECT 0001E36B52C0
>
> * from here, we're talking to the S55
> *
> * issue the phone some commands to tell us the cell ID and
> * Location Area Code whenever the phone changes serving cell,
> * and also the name (in PDU-mode encoding) of that cell
>
> AT+CREG=2
> OK
> AT+CNMI=1,0,2,0,1;+CSCB=0,50,"0-15"
> OK
>
> +CBM: 88
> 1B20003201114679785E96371A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
> 1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
> 68341A8D46A3D100
>
> * what phone network are we connected to?
>
> AT+COPS?
> +COPS: 2,0,"Telstra"
>
> OK
> AT+CREG?
> +CREG: 2,1,"1030","639E"
>
> OK
>
> +CREG: 1,"1030","1401"
>
> +CBM: 88
> 07B000320111C8F4F99C76CF418D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
> 1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
> 68341A8D46A3D100
>
> +CREG: 1,"1030","639E"
>
> +CBM: 88
> 1B20003201114679785E96371A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
> 1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
> 68341A8D46A3D100
> AT+CSQ
> +CSQ: 18,99
>
> OK
>
> +CREG: 1,"1030","1401"
>
> +CBM: 88
> 07B000320111C8F4F99C76CF418D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D16834
> 1A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D168341A8D46A3D1
> 68341A8D46A3D100
>
> OK
>
> * give the escape sequence to the Parani to drop back into
> * command mode
>
> +++
>
> * now disconnect from the phone
>
> ATH
>
> OK
>
> DISCONNECT
>
> * end
>
> Please note that the Parani and the S55 were previously paired.
>
> John

Thanks John.
Sorry for not responding earlier but for the last 3 days I was trying
to install, deinstall, reinstall my IVT BlueSoleil driver to my
Bluetooth usb dongle.
Driver installed a lot of virtual COM ports and a number of services
but non is modem.
Opening hyperterminal, selecting COM port and trying to type anything
crashes systems and blue screen is all I can see.
So no chance to enter any AT command yet.

What I read from the net is:
"
What Bluetooth software are you using on your computers? Widcomm or
Windows XP SP2?

Check what kind of network is supported by TECOM, either LAP or PAN.
If they are using LAP and you are using the Windows XP SP2 Bluetooth
software then it may not work with your computers since this software
supports only PAN.
"
My drivr is IVT BlueSoleil not Widcomm.
And frankly speaking I have no idea if my Bluetooth usb dongle is LAP
or PAN.
Anyway IVT driver installed no LAP or PAN device on LPT or COM port to
use.
So mayby I have to give up.
But I can still tranfer files between my Nokia 770 and PC.
So any form of modem should work.
As Nokia 770 is Debian OS based device I will try to install minicom
terminal application ported to that device
and start the above procedure using Nokia 770.

Darius

http://members.lycos.co.u · Joined: 27 Sep 2007 Posts: 9

On Sep 30, 10:47 pm, John Henderson wrote:
> Hi Darius,
>
> http://members.lycos.co.uk/dariusjack/wrote:
> > So no chance to enter any AT command yet.
>
> I should have mentioned that the scanning command I used:
>
> AT+BTINQ?
>
> is specific to my Parani adaptor. As far as I know, there is no
> standardisation for Bluetooth "AT" commands (unlike the
> industry-standard cellular extensions, which begin with
> "AT+C").
>
> I also have a TDK blu2i Bluetooth RS232 adaptor. It has a much
> more powerful "AT" command set than the Parani, and uses the
> command:
>
> AT+BTI
>
> to scan for other visible devices.
>
> So you'd need to consult documentation for your specific device
> if you want to scan for nearby units.
>
> John

Thanks again.
I have deinstalled all and installed back my bluetooth DUN and LAP
modems to com4 and com5 respectively.
Pinging modems with AT command from diagnostic menu I get no reply.
>From diagnostics:
Modem type: Bluetooth DUN Modem
DSR state low, CTS state low, CD state high on initialization.

Diagnostics says devices work ok.
Bluetooth LAP modem diagnostics
or works ok
diagnostics log file
didn't open a device on error 00000020
So it looks I have DUN Modem.

Downloaded 119 page long pdf manual from IVT BlueSoleil.

DUN stays for Bluetooth Dial-up Networking (DUN)
PAN stays for Personal Area Networking

I am just reading manual and it looks very complicated.
Just installed Bluetooth Fax Modem
but still can't ping it.
Windows says it works ok.

Something must be wrong.

Darius

John Henderson · Joined: 25 Jul 2007 Posts: 165

Hi Darius,

http://members.lycos.co.uk/dariusjack/ wrote:

> So no chance to enter any AT command yet.

I should have mentioned that the scanning command I used:

AT+BTINQ?

is specific to my Parani adaptor. As far as I know, there is no
standardisation for Bluetooth "AT" commands (unlike the
industry-standard cellular extensions, which begin with
"AT+C").

I also have a TDK blu2i Bluetooth RS232 adaptor. It has a much
more powerful "AT" command set than the Parani, and uses the
command:

AT+BTI

to scan for other visible devices.

So you'd need to consult documentation for your specific device
if you want to scan for nearby units.

John