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 Bluetooth connection & traxster kit
 
 10/26/2007 10:27:04 AM
EandP
3 posts


Bluetooth connection & traxster kit
Hi.

I have a traxster kit with a serializer version 1.1 controller and a turret with a cmucam 2+, which I would like to control (make it follow a black line on the floor. nothing too fancy).
The thing is, I would like to replace the existing connection (serial port Rs232) with a bluetooth solution. Where can I buy the bluetooth module for the serializer 1.1, and how should I connect it to the serializer.
The other problem that I'm having with the traxster is that I need to get the image from the cmucam2+, but I would also like to transmit it to the computer using the bluetooth connection. How should I do this?

thanks in advance.

E&P
 10/26/2007 11:47:45 AM
jason
158 posts
5th


Re: Bluetooth connection & traxster kit

We used to use the A7Engineering eb505 Bluetooth module, and connect it to the Serializer using the information provided in the Serializer User Guide (page 15).

Unfortunately, it doesn't look like that's available anymore.  However, the eb500-SER should work, as it has the same supply and TTL voltage levels as the eb505.

http://www.a7eng.com/products/embeddedblue/serial/eb500-SER.htm

You'll also need a Bluetooth module for transmitting the CMUcam2 images back wirelessly.   This same module will work for the CMUcam2+ as well.

At some point (next year), it would be nice to integrate the CMUcam2/2+/3 w/ the Serializer, and provide a pass-thru mode, so that you can send commands to the CMUcam2/2+/3 thru the Serializer, and utilitze one serial connection.   This would imply that you would need to stop all motors, etc. first, in order to prepare for the lengthy image data that would be spewed back.  :)

Best Regards!


Jason Summerour
President,
Summerour Robotics Corp
Microsoft MVP
www.roboticsconnection.com
 10/26/2007 5:07:55 PM
EandP
3 posts


Re: Bluetooth connection & traxster kit
Thanks for the fast reply Jason. So I'll have to buy two eb500-SERs. Won't there be interferance between the two signals since they both send information at the same frequency? Will a standard laptop bluetooth module be able to comunicate with both eb500-SERs simultaneusly? E&P
 10/31/2007 11:14:04 AM
jason
158 posts
5th


Re: Bluetooth connection & traxster kit

Most bluetooth radios for standard laptops won't support two simultaneous connections.  Multiple BT devices can be paired to the laptop BT radio, but only one can be open at a time.

So, I guess the app would have to stop the robot, drop the serial connection, open up another one for the CMUcam2, grab the frame, process it however you like, then reconnect to the Serializer, and continue.  That's not the most optimal solution, but it's the only way I can think of doing it at this point.

This is even more reason to add functionality to the Serializer so it can pass thru CMUcam2/2+/3 images & data. :)


Jason Summerour
President,
Summerour Robotics Corp
Microsoft MVP
www.roboticsconnection.com
 10/31/2007 11:31:51 AM
ringo
36 posts


Re: Bluetooth connection & traxster kit
'theoretically" you could have a bluetooth connection and an X-bee connection at the same time. I have not tried this though and don't know if there would be any interference.
Ringo Davis, Hardware Technical Lead RoboticsConnection.com
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