In one-way asynchronous serial communication, how does the receiver sync up its bytes? I want to make a serial system over RF to receive messages sent from a computer, so I can understand how digital radio works on the bare metal. The one part I don't understand is how a sender and a receiver sync up the start and end of their bytes. It seems like it would be really easy to lose synchronization and end up with everything shifted by a few bits. How do two serial nodes sync up the start and end of their bytes?