[Jon Stratis]

This really does sound like an electrical issue, not a programming issue - everything works one second, and doesn't the next with no changes in between. Since you know the Jags aren't getting a signal, odds are the root cause is located where that signal is coming from - the Digital Sidecar. Double and triple check it: Is it getting full power (all 3 status LED's next to the power port should be on - Batt, 5V, and 6V)? Is the RSL still working? Can you try swapping it out for a spare?

At LSR last weekend, our robot died on the field. The FMS showed a good connection, the radio and cRio were still up, and we were getting the battery voltage sent through correctly. When we got back to the pit to diagnose the issue, we saw that the speed controllers weren't getting any signal. Tracing this back to the one point of commonality they all share (besides the PDB, since they all had power), we saw the 5V LED on the DSC wasn't lit. The students quickly and efficiently swapped it out for one of the spares we brought, and everything worked fine after that! Testing the one that broke is on our to-do list... I'm hoping there were just some metal shavings that shorted the 5V rail and the thing is still fine, once we get it cleaned out!