Hi. I'm with same or similar problem since some days ago, Cayenne going offline with no reason. If I test ports using Python commands they are ok, just the Cayenne dashboard get halted, saying the device is offline since some time.
This happened first time some days ago when I used "sudo apt-get update" and "sudo apt-get upgrade", as Cayenne stopped working at all I just restored last SD image, but since then there was no new updates on RPi.
UPDATED: today I can't reach Cayenne using Android app, but modules were working normally because a PIR motion that I've just installed yesterday was ok (led turning on and off on movement). So I tried desktop dashboard, no success, and when I enter it, says "last know status:a minute ago, as if it halts right when you access it.
Any ideas? Thanks in advance.