How to test single board rs485 communication

Download a software named modscan on your computer, and then go to the e-store or online shopping for a "232 to 485" (485 is a data communication interface, similar to the 232 interface, except that the 485 supports point-to-multipoint communication. 232 is point-to-point communication, and 485 is a differential signaling.) The converter, the line can be connected to start testing the test inverter RS485 communication.