Port.stopbits read/write property

Sets/gets the stop bits mode of the serial port.
Stop bits in serial communication indicate the end of a data packet. They help synchronize the sender and receiver, ensuring proper data transmission. The following values are supported:

• "one": 1 stop bit, used in most serial communications
• "one5": 1.5 stop bits, rarely used, mainly in older systems
• "two": 2 stop bits, provides extra timing buffer (useful for slower devices)