How to Test Serial Port Pos VFD Customer Display
VFD Customer display usually has two interfaces, USB and serial port. USB port, USB can supply power, plug and play,. The serial port is also called RS232 interface or COM interface.
we need to pay attention to the fact that serial ports generally cannot provide power, an external power supply (addtional USB cable)is required.
First: Serial Connect PC with VFD customer display
Second: USB port connect to the PC, provide the power.
Third: open Serial Tool, to send the data to display, at the same time, check the display of pos display.