How to send signals from one Arduino to another by using analogue in?

hello, absolute dummy in terms of electronics , have - think - small problem.

i have arduino 2560 of 54 digital channels used. want arduino able receive signals @ analog inputs. these signal come arduino.

this want:

i need 5 different states recognized 2560. starting solder cmos 4066 4 channel switch , connect them 4 different analogue inputs, wondered if not possible easier using 1 analogue channel measuring values @ analogue in, indicate states ranges, this:

value 0 = state 1
value 1-250 = state 2
value 251-500 = state 3
value 501-750 = state 4
value 751-1023 = state 5

what have on sending arduinos side achieve this, , on receiving arduinos side?

thanks lot help!

martin.

why not use analogue inputs digital inputs, , use software serial?

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