I have multiple DT85 devices (both 3 and 4). One of the series 3 units can be seen by DEX2 using either USB or ethernet connection but when I try and check connectivity it always says "Device Offline". It changes the light indicator on DEX2 from red to yellow.
I saw another post that said to check the console errors. Unfortunately, I do not have any console errors as DEX is seeing that there is a device but the device is sending back that it is offline.
Another suggestion was to try a non-network computer, same result as my office laptop.
Running Firmware 9.22 on the DT85 (updated via USB thumb drive after this problem started happening), DEX version 2.1.25.