My goal is to get an audio stream from one computer to another. The caveat is that the computers are over 100ft away. I'm using one arduino uno which will output serial commands to an RS-485 chip which is then received by another uno on the other end. Both computers are Raspberry pi's.
Using software serial it was pretty easy to push data from one to another but speed started to become an issue. Anything over 19200 baud was getting errors. I would like to do 115200. I took the first arduino and jumpered the reset to ground making it bypass all the coding and send it's signal right away. This made the 115200 much more reliable but nowhere close to perfect.
My problem is I can't get the second arduino to receive data as a ttl to serial converter. I can get the rx, tx pins to light up. I've tried every different combination of wires. For the sake of testing I'm not using the RS-485 chips. I'm directly connecting the rx, tx pins on the arduino.
Is it even possible to receive serial data from one arduino to another when both are connected to a computer? This is the real question. I just want to know if it's possible to do this without having to do software serial because it's too slow for my needs. Is there a better way to achieve rasp pi to rasp pi audio streaming?