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85 (ASCII "U") to the host on the serial line

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I have an XBee Pro S1 unit on a new board that seems to be sending 85 (ASCII "U") to the host on the serial line. Is "U" a sign of a specific condition? I haven't seen this from other systems before.I am diagnosing a problem that could involve a communications overrun that may be locking up the serial port on the host. I need to know if receiving multiple "U" bytes on the host com port means anything important.
asked Jan 24 in IEEE 802.15.4 by William Benshoof New to the Community (0 points)

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