How to connect SMOKE DETECTOR SENSOR with KC868-A64?

[jigneshk5]

I did connected A64 to the same router with Ethernet cable but still showing disconnected. I also enabled STA mode but no success. What can be the issue?
I subscribed to KC868_A64/D4D4DAE11DF8/STATE with my pc mqtt client but no message. I tried "Set beep output" but not working.