I have havd several all star nodes up and running using the DMK URIx interfaces each connected to thier own BeagleBone Black. Normally I see the green light on the URIx blinking at me. In the past few months I have seen where the light stops blinking. some times pulling the USB for 10 seconds and plugging it back in solves the problem. worse case a full reboot of the system. . now its only getting worse instead of better. and almost daily issue. I thought about the watchdog idea. but it monitors the read write to a file  if I remember correctly. is it possible to rewrite the watchdog to monitor the pulses of the URI instead and act on the loss of pulses from the URI