Info about the barcode scanner's communication protocols and pinouts

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edutk

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Hello all,
I need to make a communication between a barcode scanner QuickScann qs1000 (by PSC) and a microcontroller (rabbit 2000) using only 3 wires (serial asynchronous communication). Is it posible?
Where can I find technical info about the barcode scanner's communication protocols and pinouts?

Thanks,

Eduardo.
edutk@adinet.com.uy
Montevideo, Uruguay.
 

communicating with serial barcode scanner

seems that this scanner's got a usual RS232 interface. Normally a barcode scanner works unidirectional (at least when connected to the keyboard). So I'd try to find out what happens if you connect it to your PC's serial port and establish a connection using hyperterminal. Then scan a label and watch the screen. If you receive some bullshit, play with the baudrate and parameters. Begin with 9600 8N1.

Btw. a serial communication via 3 wires (Receive, Transmit, Ground) is possible if the scanner doesn't need the handshake signals.


Mik
 

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    edutk

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scanner barcode unidirectional

Btw. a serial communication via 3 wires (Receive, Transmit, Ground) is possible if the scanner doesn't need the handshake signals.
Click to expand...

even if the scanner use hardware handshake signals, you can link RTS and CST to avoid that.

If the scanner interface is already programmed (output format and serial interface parameters), and if you want the scanner to act only as input device you can use only 2 wire for communications (TX of the scanner and GND).

Hope this help,
//a

PS: you can make some simple test using a PC and the hiperterminal...
 

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    edutk

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barcode unidirectional

Thanks for the help, it's works ok.

Eduardo.
 

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