I'm adding code to the firmware to have data be request instead of being push from the ArduIMU v3.  I have tried many thing to set up the handshake but none work. 

So my question is: Does multiplexing the GPS off serial0 prevent the ArduIMU from receiving data from another micro controller (in this case an UNO)?

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  • I do not recall using a V3, but based on how the older IMUs worked, try this:

    Pull D7 low to listen to the "A" input (GPS) of the mux. 

    Pull D7 high to listen to the "B" input (serial line on connector) of the mux.

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