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March 28, 2015
about 5 years ago
You will need to connect DTR on your programming cable to one of the digital IO pins of the source XBee, and make sure the corresponding pin on the destination XBee is connected to the Arduino's reset pin.
The Series 2 XBees do not transmit pin levels when in AT mode, and you can't load new programs onto the Arduino in API mode.
XCTU expects to find an XBee directly connected to the computer. It cannot talk to devices attached to Arduinos attached to the computer.
So you'll need at least two XBees, one connected to the computer (e.g. in coordinator mode), and the one attached to the Leonardo. Then the Leonardo can talk to the computer through the XBee, and XCTU will be able to detect both XBees (one through the serial port, the other through the first one's mesh network).
Yes, XBee provides a range of radio including ZigBee mesh networking. To learn more, check out Robert Faludi, "Building Wireless Sensor Networks", available through SparkFun here: https://www.sparkfun.com/products/10324 (also available directly through O'Reilly).
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