I have several Sonoff Smart Plugs. I assigned them to VLAN, with only WAN access. Sonoff has an app, that allows LAN mode, which means I can access the devices without internet. My mobile, which is connected to internal home network, is separated from the VLAN devices.
When I disconnect from internal network, and connect my mobile directly to WAN via Data, I can see the proper reporting of the Sonoff devices on the Sonoff app. Once I join my home network, it's blocked again.
I read that Sonoff LAN mode is using port 8081. What should I do to allow this app to work within the home without internet?
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