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I remember reading a series of 3 short sci-fi stories or novels in the late 90s. The books themselves were older, probably from the 80s.
The three booklets all had the same protagonist: a psychic gambler, as far as I remember.
In one book he fixed a planet that had to deal with psychic-linked fauna. The settlers there had set up automated defense systems, which angered the fauna, forcing them to attack.
In another, he crash-landed in an early renaissance world. He brown-nosed up to one of the houses that ruled there, using his knowledge about electricity. He built a Morse Machine, that used a modified Morse code. I believe or was HTH encoded like our SOS as ...---... .
My memory fails me on the contents of the last book.
Which series is that and who wrote it?