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Where you able to upload this to github? I'm having the same issue and have been for months now. I've even tried multiple arduino's.
I've been trying to get it read all week. In the arduino program I see Idle 0 and idle 1 going back and forth. When the program runs the rx light on the arduino flashes once then I get the above error. could I have something soldered wrong and it's not reading any values from the sensors?
I'm getting the message "Connect the TBS shield before starting this application" I've changed the com port of the arduino to 11 and 12 with no luck. Is there something else I'm missing or have done improperly?