Receiving air conditioner parameters by IR receiver?

Question

Arduino

Hello everyone, I’m going to make a small smart home system, to control the air conditioner I will send commands using the Arduino + IR sensor, but during the implementation it became interesting how the air conditioner physically works, what kind of brains it has (it’s clear that everyone has their own, I’m just interested in the general principle). If there is a certain DSP, is it possible to receive data by wire? or, for example, using an IR sensor - (data is available; I will enter the current temperature, included additional options - FAN, direction of cavities, and others). The latter became interesting because when you turn on the air conditioner with a stationary remote control, the remote control is somehow synchronized ....
Please tell me or leave links to the difference resources for review

Answer 1

The remote control simply sends all the parameters to the air conditioner.

Answer 2

Most often, as in the TV, there is an IR LED in the remote control, and in the air conditioner / TV, the photo receiver is a diode , that is, the
condo / TV is exclusively listened to, but they can’t speak ...

Answer 3

To connect to networks (Modbus-RTU, LON...), you can use IntesisBox units (according to the site, Spain) and CoolMaster (Israeli CoolAutomation). At the "Smart Home" exhibition, I was told that the first option is preferable, because. developers receive air conditioner codes directly, and the second company empirically (by analyzing IR codes). Choose a brand of air conditioner. In some cases, if the remote control also hangs on this network, then it may interfere (but not a fact). Here you have communication in both directions (via IR only in one direction).