Qr code output before man with Numbers are no problem, is the problem to the output when qr code, some printer can normal output, some is not only the output text, normal output of qr code printer is installed on any computer can output the qr code, can not output success of qr code to any computer cannot normal output,,, my shows good understanding, using new beiyang secondary development kit, all machines are epson thermal printers for parallel connection, relationship with the cache? Should first clear the cached output? All printer is a type of,

CodePudding user response:

This is a code, just don't know why some machine output not now

CodePudding user response:

If you use the manufacturer's own demo program can't print is successful, that is the problem machine,
In this case, you can only see the demo of manufacturer, and manufacturer communication,