Bluetooth UART problems

Wireless & IoT
1

Hi,

I bought a bluetooth module from sparkfun, "Bluetooth v2.0 SMD Module

SKU#: WRL-00149", and I am having some problems getting it to work properly. Its mounted on a PCB receiving UART from an AT91SAM7S256.

On the PC end I am using a bluetooth dongle with bluesoleil. I can see the device on the computer and connect and create a com port between the two. From hyperterminal I can send various commands and receive back the appropriate responses (+++ etc)

The problem is however I cannot get my UART from the ARM to go through the Bluetooth module and show up on my computer. I have checked the UART with a scope and it is definitely getting to the module. I have double checked my baud rate and parity settings too.

Is there some special mode I have to set the module to? Can anyone think of anything I could possibly be missing? Also any suggestions as to a good replacement for hyper terminal?

Thanks in advance,

David

2

Can’t help with anything else, but try RealTerm. It was just suggested to me on another forum and it is light-years ahead of Hyperterminal.

Good luck,

John

3

Thanks. I have downloaded that software and it is really nice. Even has some options to adjust the settings on the bluetooth module!

I still haven’t figured out what the problem is yet though.

4

I have a string being sent from my processor to the blue tooth module. Although I cannot see this on my PC. ( I can successfully send commands to the module from the pc and receive ‘OK’ etc.)

What exactly do I need to do to send basic data from the BT module to the computer?

Do I need to short CTS and RTS together? Also is there any special mode the BT module has to be in? All I have done so far is change the name and the baud rate of the device.

If you can help me please do! I really need to get this thing working asap and I have no idea what is wrong.

Thanks in advance,

David.

5

Sorted the problem out. I had PIO4 connected incorrectly. Disconnected it and it works great!