The issue you had with the USBVCOM driver was due to the current driver no longer supporting Windows 7. The fix to this would have been to use an older version of GCC which we could have provided you with.

As for the WiFi, make sure both fixtures are running on the newest module firmware. You can update the firmware in 2 ways, through the web browser OR with our WiFi update tool which can be found here:
https://www.aquariumcomputer.com/dow...irmware-v6512/

The WiFi update tool allows you to do the update via a USB connection instead of going through your network.

If these intermittent disconnects continue, assign a Static IP to your fixtures.