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9 seriel ports on the WR21

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I am wondering why you are able to configure 9 serial ports on the WR21, Serial 0 is always the physical port, but what is the rest used for - virtual ports, or a kind of "serial port HUB"

asked May 30, 2018 in Digi TransPort Cellular by martingjensen New to the Community (1 point)

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The others are used by usb serial /GPS and cellular modules

and to follow other models like wr44 with 3 extra serial and other daughter cards
answered May 31, 2018 by James.Wilson Veteran of the Digi Community (1,227 points)
selected Jun 26, 2018 by martingjensen