1. Direct connection: directly connect the serial communication ports of two devices (such as RS232 and RS485) through serial communication cables. Ensure the serial parameters of the two devices (such as baud rate, data bits, stop bits, check bits, etc.). ) to ensure the correctness of data transmission.
2. Use serial port expander: If you need to connect multiple devices to a serial port, you can use serial port expander. The serial port expander can expand a serial port into multiple serial ports, so that multiple devices can be connected.
3. Use a serial server: If you need to access serial devices remotely, you can consider using a serial server. The serial port server converts serial communication into network communication, allowing connection to remote devices and communication through the network.