A8 serial monitor is a uart/rs232/com port monitor/debug free software from a8blog.com
Features list:
1, Small exe file size, Only 33kB. Portable, no installation needed.
2,Support high baudrate of USB to serial converter ICs, ex CH340、PL2303、FT232、cp2102.
3, Support dynamic plug and play with usb to serial ICs.
4, Display with HEX and ASCII mode.
5, Fast response.
6, Support all baudrates, stopbits, parity control, data bits etc.
7, Send file to serial also support.
8, Support time controled automatic send.
9, It supports appending newline character after sending string.
Connection:
Serial port (UARTor RS232) typical connection is shown in the picture below
The difference between RS232 and UART is the level of logic 0 and 1. RS232 negative level is 1, positive level is 0. UART high level is 1, low level is 0.
Baudrate:
Baud rate refers to the data transmission speed of both sides, bits per second (BPS). Because the serial port is asynchronous, there is no synchronous clock signal, so the sender and receiver must agree in advance to transmit at the same baud rate. The commonly used baud rates are 2400, 4800, 9600, 19200, 38400, 57600, 115200, etc. with the popularity of USB to serial chips, ultra-high baud rates, such as 256000, 921600, 3000000, 6000000, are also widely used. Even some of the baud rates used are quite special. The software can set any baud rate, as long as the chip supports.
Data bit, stop bit, parity bit:
Each serial port data packet consists of several bits, including a start bit, several data bits (generally 8), one or no parity bit, and several stop bits (generally 1)
The packet format is as follows: