Task 15 - Byte output using RS232 soft-serial protocol

Arduino RS232 soft-serial protocol

Task7 -2 Arduinos connected Tx -++ Rx pins

The asynchronous packet in RS232 transmission

The diagram isn't helpfully large but here's a text-type link

Here's a Wikipedia link from which comes the diagram at left.










Note that this one has:
* a start bit
* 8-bit data transmission (limited ASCII may use only 7 bits)
* a single ( the usual) stop bit
* no parity bit (parity can be even or odd).

The RS-232 asynchronous Tx-Rx protocol