Connecting Devices to Jabber
LEGO MINDSTORMS. What a great reason to dig out that box of LEGO bricks you haven’t touched in years. When I found out that LEGO was bringing out a programmable brick, the RCX,[2], I went to my favorite toy shop and purchased the set. In addition to the RCX (shown in Figure 9-1), the MINDSTORMS set comes with an infrared (IR) port and an IR tower, which you can connect to the serial port of your PC, a battery compartment,[3] motors, touch and light sensors, and various LEGO Technic parts.
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There are plenty of ways to interact with the RCX. The MINDSTORMS Robotics Invention System (RIS)™ set comes with Windows software with which you can build programs by moving blocks of logic around graphically on the screen and chaining them together. In addition, various efforts on the parts of talented individuals have come up with many different ways to program the RCX. The Unofficial Guide to LEGO® MINDSTORMS™ Robots (O’Reilly & Associates, Inc., 1999) tells you all you need to know about programing the RCX. What’s important to know for this recipe is detailed in Programming the RCX.
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