Introduction - If you have any usage issues, please Google them yourself
A serial program written in vc+ +, the PC communicates with the lower machine, the PC sends the instructions to the lower machine, and the lower machine sends the corresponding data to the PC according to the instructions received. 1 with the vc++ program written in serial port, PC and the next bit Computer Communication, PC to send commands down to bit machine, the next bit plane according to the instructions received through the serial port to the PC to send the corresponding data.