We are developing an application which prints RFID labels using Zebra RZ400 RFID printer. Until now, we were sending ZPL commands by RawPrinterHelper class which makes call to winspool.drv.
However, we soon realized that not all tags are printed successfully so we looked for a way to get feedback about the success of the last print operation. There is a command "^RV" that is said to return a string upon a print operation that reflects operation success result.
Now, the problem is we don't know a way to get this feedback data from printer! RawPrinterHelper class does not have any method to get data.
I connected the printer to USB and used LibUsbDotNet library to communicate with the printer. I can send commands to printer successfully including "^RV" command and read from USB again to get the feedback from printer. I can get the feedback value but not every time, only once after randomly printing lots of tags.
Is there an offical SDK from Zebra to communicate with printers? What can be wrong about USB communication? Please share your experiences regarding Zebra .NET development.
