422 communication conversion module

Background: This module is made when debugging underwater robots. When the robot is underwater, it cannot be controlled using wireless signals. It can only use wired signals to control the robot. Using ordinary serial port signals (usart) will cause limitations in transmission rate and transmission distance. Therefore, we use the solution of the robot main control board outputting the usart signal -> the module (converting usart to 422) -> network cable -> the module (converting 422 to usart) -> the host computer. Inside the underwater robot, the usart signal output by the robot's main control board first passes through this module and is converted into a 422 signal. Through the network cable connected to the network port, the 422 signal is transmitted out of the water to the ground, and then the module converts the 422 signal The usart signal is sent to the host computer, and the transfer logic of the host computer to the robot control instructions is reversed.