Check the serial port in Linux, and check the serial port in linux

Check the serial port in Linux, and check the serial port in linux
1. Description

Check whether the serial port is available. You can send data to the serial port, for example, to the com1 port, echo lyjie126>/dev/ttyS0
Check the serial port name using ls-l/dev/ttyS *. Generally, the serial port name is under dev. If you do not have an external serial port card, the default value is ttyS * under dev *, generally, ttyS0 corresponds to com1 and ttyS1 corresponds to com2, which is not necessarily inevitable;

2. View Methods

• View serial driver: cat/proc/tty/drivers/serial
• View serial device: dmesg | grep ttyS *