does all "CUBE" sat or "student sat" allocate the function?

if they are carried the function, ie they are like to have the same "circuit board" ... using MCU to
a. find their altitude or latitude,
b. telemetry, c. radiation level d. space temp
of course those "military spy sat".
I am talking only those "citizen sat" for discussion.
they are always applied the same protocol to transmit or upload data file. so there must manufacturer fabricate the "common function" cubesat , picosat or student sat.
the only point who is going to help them to shoot it into obit.
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