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I have two Arduino boards which I've attached XBee radio boards to. One is to send data via Serial.write(num), where num is an integer. The other is receiving that integer via Serial.read. However, when I have both units running, nothing is ever received by the receiving unit. I've tried switching the receiving unit radio board to the USB mode so that I can use the serial monitor to send data to the unit. I've tried sending bytes 01111110, as well as integers such as 77. Nothing ever gets read from the serial monitor. I've downloaded XCTU, but it cannot find either of the radios. What can I do?

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