2 XBee series 1 modules talking to each other
In this setting, one of the radios (right) is configured to read Analog input from AO0, and the other one (left) outputs the signal from its PWM0 port. All the settings done through AT commands. Receiver (base, left) radio, is connected to an Arduino UNO, which takes data through the serial port, and turns the LED on or off according to the level of resistance of the LDR on the remote (right) module.
There's a previos step, setting up the XBee modules. You can see what I did using CoolTerm in this other video:
• Xbee series 1 setup using CoolTerm in OSX
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http://amara.org/v/BqvC/