PDA

View Full Version : what about...?



Stein-ove
09-20-2008, 09:14 PM
what if parallax made an developer board with bluetooth interface? I'we broken the usb connection on the board, twice now! i stumbled on the usb cord.

Mike Green
09-20-2008, 10:13 PM
The problem with Bluetooth (or WiFi) is that there are short delays while data is assembled for transmission, transmitted, then unpacked for transfer to the device at the other end. There are delays as well with USB, but they're very very short. These delays interfere with the downloading protocol which was never designed for wireless use. The only way downloading could be implemented wirelessly would be to add a separate Bluetooth controller with buffer memory. Either the Stamp Editor would have to be modified for the timing changes or you'd have to save the binary program, then use a separate PC program to transfer the binary over Bluetooth to the download controller which would then download it to the Stamp.

It was done already as a special version of RF Solutions' Toothpick sold by Parallax. Parallax no longer carries it, presumably because it didn't sell very well. Something like this would probably add $100 to the cost of a development board.

Chris Savage
09-20-2008, 11:48 PM
A BT solution would dramatically increase the cost of the boards. Might I suggest a cheaper solution? Try not to stumble on the USB cable. ;)

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Engineering