The function is very simple, only input and output, basically no logic. Single chip microcomputer module = barcode scanner (USB port or serial port) + network port + small LCD screen + sound output in
How to send ASCII code to the instrument through the serial port in the single-chip microcomputer! Because the instrument serial port protocol already exists, 1. Serial port protocol (1) 8 data bits,
In Wince4.2, PPPOE is used for ADSL dial-up. There is no problem with the first dial-up after installing and setting up the software. After that, I can always dial up, but the network does not work. A
Including board, sdram, 320x240 2.2" 8-bit screen, pin headers are already drawn out. See below for what you have made, serial port programming, code provided, 70 excluding postage.