#1 directional IR blaster
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the "M5Stack ATOM Lite" has an IR blaster on it and you can use ESPHome to set that up to send whatever you want.
as for "1 directional"... its going to be mostly directional but IR is light and light will spread out/bounce around etc...
as long as nothing else is picking up the signal and doing stuff with it, it shouldn't be an issue?