About BT Bluecore 3 SPP disconnect

shinraluo · Joined: 29 Jan 2008 Posts: 1

Dear All

I'm use a microcontroller + CSR bluecore 3 gateway to made a Bluetooth
device.

I have some question for Bluecore-3-Gateway SPP mode, Please give me
some help.

My question is below, I can use the AT command to control module
process pairing and connection,

And via the SPP mode transmit stream data, but I can't disconnect in
the stream mode,

because the module consider the AT command(AT+CRDR) is stream data
too.

Please answer me, How to disconnect in the stream mode, and bluecore 3
have any at command of escape sequence.

Thanks in Advance.

Shinra.

Archived from group: alt>cellular>bluetooth

John Henderson · Joined: 25 Jul 2007 Posts: 165

shinraluo@gmail.com wrote:

> Dear All
>
> I'm use a microcontroller + CSR bluecore 3 gateway to made a
> Bluetooth device.
>
> I have some question for Bluecore-3-Gateway SPP mode, Please
> give me some help.
>
> My question is below, I can use the AT command to control
> module process pairing and connection,
>
> And via the SPP mode transmit stream data, but I can't
> disconnect in the stream mode,
>
> because the module consider the AT command(AT+CRDR) is stream
> data too.
>
> Please answer me, How to disconnect in the stream mode, and
> bluecore 3 have any at command of escape sequence.
>
> Thanks in Advance.

I don't know this unit, but you could try the usual method for
such devices.

To go from data transfer mode to command mode you normally enter
the relevant escape sequence, with a "guard time" quiet period
either side.

The usual escape sequence is the 3 characters "+++". These
should be entered in quick sucession, with a guard time period
of a couple of seconds either side. The guard time is a period
in which no data is transmitted.

With luck, that will put you back into command mode. The data
transfer session might still be active in the background, and
you might need a further command to close it. If so, try

ATH

or check the documentation for an alternative command to do this
(once you're in command mode).

John