[Mackenzie W]

My team is posting here after spending a fair amount of time troubleshooting this issue, any help would be appreciated.

Our issue presents as a half second or more drop in communications with the robot, with the Driver Station flickering to no connection and then back to enabled and driving. This loss results in the robot abruptly stopping, risking damage to itself and possibly dropping whatever load it might be carrying.

During this time the logs show major packet loss without a complete disconnect, with only voltage not registering. The error that accompanies it is:
Info
Communications Timeout: # Input Voltage
Brownouts: 0.

The number appears to be the amount of times it has happened during that match. So far the most we've had is 21 times in 5 minutes.

We've so far replaced the router+power cable+Ethernet cable, VRM, attempted tethering directly and wirelessly, and had no luck.

We looked at the packets being transferred with Wireshark and found that we were having packet re-transmissions from the RoboRIO and then had the laptop read Duplicate Acquisition on said packets, 0.8 seconds before the DS log registered the Communications Timeout.

We haven't been able to find anything at all about this type of error in the Driver Station log, can anyone give us any recommendations on further steps?

Thanks! I have attached both an example driverstation log and Wireshark log for the error, the duplicate transmission occurs at packet #19160.


**We've noticed that the mode LED on the RoboRIO shuts off when we lose these packets. That's standard for disconnects normally, doesn't help us much though. We've tried both our code and sample code.