Another LEGO Case

[karl101]

Not really a case, more of a framework. And I for one would like to congratulate the creators of the Pi for their foresight in making the computer fit so well with LEGO.



Karl

[tech_monkey]

Just googled for the Xbee looks very interesting. How are you connecting it to the PI and is it the wifi module or another module.

[zeeteex]

Just googled for the Xbee looks very interesting. How are you connecting it to the PI and is it the wifi module or another module.

I had exactly the same question, other than that... Very cool design!

[jecxjo]

Xbee are Point-to-Point and Point-to-MultiPoint serial radios. Some models of these radios (ones with ZigBee Protocol) have the ability to produce a Mesh Network allowing a wider distance between two points by hopping traffic along multiple radios from source to destination.

I've used this for projects at work and they work wonderfully. I believe all of their models are UART based configuration/communication and their client-to-radio protocol is not as rediculous as some I've tried.

[karl101]

As it happens, I just posted an how to connect an xBee here:
http://www.raspberrypi.org/phpBB3/viewt ... 56#p101556

I got my xBee and 5V/3.3V Adapter Board from here:
http://www.active-robots.com/catalogsea ... p=2&q=xbee

These are wireless serial ports, not wifi. I use them to connect to my LEGO robots.

Karl

[tech_monkey]

I have a control board that requires either an RS232 or TTL serial input for commands. So I could use a couple of these Xbee things instead of a cable then. Actually the board can be set with an ID so I guess one Xbee for the PI and then the required number for the boards I have.

[karl101]

I have a control board that requires either an RS232 or TTL serial input for commands. So I could use a couple of these Xbee things instead of a cable then. Actually the board can be set with an ID so I guess one Xbee for the PI and then the required number for the boards I have.

I'm using my xBees in a basic RS485 mode, so the Pi and the robots will be doing the message handling, but they will do all sorts of clever stuff. Digimesh looks interesting, where they create their own little network, so two radios that are out of range of each other can send messages through nearby xBee's.