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Communication error to second REV Hub

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  • Communication error to second REV Hub

    In yesterday's qualification matches, our robot often run into weird behaviors in both Auto and TeleOps, caused both somewhat inconsistent. Logcat seems to indicate a communication error, there was no response from the second Hub for a few seconds. The weird thing was that this error happened randomly and recovered by itself in a few seconds. Could a flaky RS285 cable or something wrong inside the second Hub cause the issue? Anyone else has seen this before? We will swap out the second HUB and see if it's the culprit.

    Code:
     12-15 14:04:04.859  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=86 ref#=0 
    12-15 14:04:04.960  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=86 ref#=0 
    12-15 14:04:05.008  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=86 ref#=0 
    12-15 14:04:05.009  9674  9844 V RobotCore: timeout: abandoning waiting 250ms for response: cmd=LynxIsMotorAtTargetCommand mod=3 msg#=86
    12-15 14:04:05.009  9674  9844 V RobotCore: nack rec'd mod=3 msg#=86 ref#=0 reason=ABANDONED_WAITING_FOR_RESPONSE:256
    12-15 14:04:05.010  9674  9844 W LynxMotor: LynxIsMotorAtTargetCommand was abandoned waiting for response
    12-15 14:04:05.111  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=87 ref#=0 
    12-15 14:04:05.212  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=87 ref#=0 
    12-15 14:04:05.261  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1015 msg#=87 ref#=0 
    12-15 14:04:05.262  9674  9844 V RobotCore: timeout: abandoning waiting 250ms for response: cmd=LynxIsMotorAtTargetCommand mod=3 msg#=87
    12-15 14:04:05.262  9674  9844 V RobotCore: nack rec'd mod=3 msg#=87 ref#=0 reason=ABANDONED_WAITING_FOR_RESPONSE:256
    12-15 14:04:05.263  9674  9844 W LynxMotor: LynxIsMotorAtTargetCommand was abandoned waiting for response
    12-15 14:04:05.372  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1011 msg#=89 ref#=0 
    12-15 14:04:05.473  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1011 msg#=89 ref#=0 
    12-15 14:04:05.521  9674  9844 V LynxModule: retransmitting: mod=3 cmd=0x1011 msg#=89 ref#=0 
    12-15 14:04:05.522  9674  9844 V RobotCore: timeout: abandoning waiting 250ms for ack: cmd=LynxSetMotorTargetVelocityCommand mod=3 msg#=89
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