Connection between S7-1200 1212 and 1214.

Hello,
I am learning to program PLC at home and I have a small problem with connection between S7-1200 1212C and S7-1200 1214C.
In the first CPU, I can allow using put/get in the settings but in the second CPU I can't do that :(

One of the solution which I find on the internet is sharing data by web server but I don't know how do this by web server.

Okay I know how create web server but how can I share data between CPU ? :)

I am planing create something like smart home with S7-1200 and I need get/put protocol because these CPUs have only two analogue input.... But if I connect 1212 with 1214 I will have four

Thank you for any advice :)