About firmware

Firmware 6.3.5-r4 was assigned to XV2-2,
but there was a problem with the SSID hiding function,
so I upgraded to firmware

After the version upgrade, a phenomenon occurred in which the handy terminal could not be connected. Have any of you experienced a similar phenomenon? ?


Not sure if I understood the problem.

After upgrade, is the device not reachable?

Thank You.

The problem is not resolved.
I did a firmware switchback and returned it to the original firmware.