Introduction - If you have any usage issues, please Google them yourself
Direct RS485 serial port operation multi-machine communication class. Under the more than 485 single chip computer communication is easy, you can use the UART of Bit9, Windows is much lower in trouble, Windows for the next serial Bit9 Parity, Bit9 will dynamically change to switch the communication format, and the switching time to keep up with SCM us-class time. Class of this with their own separate thread to write, Windows high precision timer mechanism, high-speed switching Bit9, oscilloscope measurements, the time is about 10us, access control systems have been used for many years, long-running and reliable!