Inquiry: Multiple connection possible?

[Ryuji Konishi]

Hi,

I'm doing a survey to purchase a Bluetooth device which can host several SPP connections simultaneously.

By simultaneously, I mean that multiple connections are established between a single server device and several client devices, and each client communicates with the server independently. The host (server) must know who sends what data, distinguish each connection, and send response to each client separately. 

To do this, when the server device transfers data to the host, the server device needs to add the header to each SPP communication packet so that the host can know who send this data. And vise versa when the host sends data to a particular client.

Now, I'm wondering if I can do this job with AIRcable mini, as SPP server, by using AIRcable OS BASIC interpreter. As long as I understand, AIRcable can host 2 SPPs at the same time, and 2 is sufficient for me.

But my understanding of AIRcable is poor, so it is greatly appreciated if someone tells me that there is a certain possibility.

So far, I've found connectBlue RBS433 and bluegiga WT12 which can do exactly what I want to do. They have their special communication format, adding a header to payload, so that the host can distinguish each client. But connectBlue RBS433 is too expensive, and bluegiga WT12 doesn't have a housing case.

Regards,

Ryuji

[Juergen Kienhoefer]

Hi Ryuji,

Yes multiple connections are possible with the AIRcable products. Basically you
have 3 high speed serial ports: one UART, one SLAVE SPP and one MASTER
SPP port. The A=link... function will link each two of those ports.
E.g. if you link
the Master and the Slave port, you program a SPP relay product.

The BASIC code can read and write on any of those ports in various ways.
You can read fix number of bytes or until CR/LF. Anything can be programmed
with the BASIC code, including @UART interrupts.

You will be able to create the behaviour you need with the AIRcable products
as cheap as the AIRcable Mini. But you have to do programming in BASIC code
for that.

Hope that helps
Juergen
Wireless Cables Inc.

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