Android smartphone as a universal remote. How realistic is this?

Question

Android

There are many applications of varying levels of versatility that send out an IR beam.
But not all remotes use IR. In my case, this is exactly the situation.
Is it possible to make a device send a wave signal (electromagnetic wave, radio signal) at a given frequency? For starters, at least just on / off.
Where can you read about it? What are ready-made solutions? And what does the sdk offer?
I did not find any information on the Internet. Everything is replete with only remote controls for TV.

Answer 1

Is it possible to make a device send a wave signal (electromagnetic wave, radio signal) at a given frequency?

Without external devices, it is unrealistic when it comes to an arbitrary frequency. How exactly do you want to send a signal in the phone and at what frequency?

Answer 2

If the phone supports such a function, then it’s real, if there is no IR port from the factory, then no. I had a Samsung with 4 mini for a long time, it just had an infrared port and it was possible to control various equipment.

Answer 3

If otg supports it, then you can. Solder what you need, write, install the software driver to manage it and you're done. There are no ready-made solutions, no one was involved in such crap.
Another option is to solder some kind of crap to the TV that connects to the network and to (near) the IR sensor.
tobish through the network sent a package to hell, and a damn signal through the IR sensor "pressed the button"
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