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First, i know this is a very common question but i'm searching for the web and i can get the answer.
How Can I Open a cash drawer? it is connected to a epson printer for rj45.

Now my app print using a dll that i found. In a lot of forums said that i need to print a control char but i have printed chr(27), chr(0) p and no one has resolved my problem. Can Anyone help me?

Regars
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Solution 1

You may need to check if your code is correct - see here.

You should also try and get hold of the documentation provided by your supplier and check if the codes you are using are correct.
   
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Solution 2

Sounds like you're working on a POS system, have you tried OPOS?? those are the generic "drivers" for cash drawers, scanners, etc...
to help more I'd need to know how the hardware is setup, brand and model of the POS, etc.
   

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