Please tell me if that is a great idea or a really great idea.
Anyway, the theory is that you can connect 2 STM32S to walky-talkies, and then transmit data readable only by a touchscreen, over a distance. This would greatly improve chatting on devices. Correct me if any of the above info is incorrect.
then maybe the walky talky replaced by a small 2-way radio which would connect neatly to the UART port. It would only be about 2cm by 3cm by 2cm. the antenna could somehow be connected to the side of the box with glue.
a 3pin cable can be used.
post reply when you can help get this project running. it must be running by 21 july
Note that the UART sends digital data as low or high voltage levels.
A walkie-talkie can't process such data, since it is intended to transmit/receive speech.
So you must then convert your low and high voltages into something that a walkie-talkie can handle. The most obvious route then would be to send and receive sound.
So you use either send a tone or silence. Or better switch between two different tone frequencies. Guess what: that is a major part of a modem and normally best implemented by a modem chip. Not so funny, actually.
Better to buy radio modules that already handles coding/decoding so you can just send in the digital UART signal. There are short-width radio modules available. Or you can go all the way to mobile phones and be able to reach the other side of the world.
LOL - Good to see you have a thorough grasp of RF design techniques...!
Hmm. Did intend to write "short range" radio modules. Not sure exactly what "short width" would mean - thin form factor?
I think this post must be 20 days late...?