LPT interface printer can pass port directly to open the box order
USB printer doesn't work, how does anyone know VB open cashbox instructions sent through a printer driver?
Urgent, etc. Each ace to give directions, thank!

CodePudding user response:

Printers DO several TTL level on the signal, the circuit design of a control lock circuit, computer sending switch command can,
http://download.csdn.net/detail/veron_04/3152172

CodePudding user response:

Studied the microcontroller programming should be there must be a coffers with single-chip microcomputer control, want to use a computer and coffers communication
Baud rate should agree I think should use MScomm use com port

CodePudding user response:

Find a empty side show it to a high level,

Built with nand gate or a simple instruction is also ok,

CodePudding user response:

No money, can't test, the supermarket how to control the software

CodePudding user response:

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Good post help top!!!!!! Good post, jacking jacking!!!!!!!!!!!!!!
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CodePudding user response:

USB POS printer is also support POS instruction.

See if your printer USB virtual serial interface mode, if it is, directly to the serial port to send POS instruction.

If it isn't, but the standard HID device, then open the device sending POS instructions.

Moreover, the manufacturer must have the SDK.