Unable to Turn "Off" or "ON" via KC868 CON and 32 Relay board Controller via RS232

[subas]

OK, this photo is KC868-H32B, newest hardware, both have ethernet and wifi.
Now which do you want to use by Node-Red? Wifi or ethernet port?

Hi Sir.

I want to use WiFi. Now only the KC868-COL is configured to WiFi.