Simplex
Data travels in one direction (from A to B). An example of a simplex link would be scoreboards
such as those used in hockey, basketball, or other sports. The information is entered at a console
by the. score/timekeeper and sent serially to large displays that everybody can see.
Half-duplex
Data travels in one direction (from A to B) and then the other direction (from B to A) but not at
the same time. The RS-485 is half-duplex.
Full-duplex
Data can travel in both directions at the same time.
Kavungya answered the question on May 14, 2019 at 08:39
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