This is usually a port mismatch. Go to Control Panel > Devices and Printers. Right-click the printer, select Printer Properties , and navigate to the Ports tab. If it is checked on LPT1 or COM1 , change it to USB001 (or whichever virtual USB port your printer is plugged into). Click Apply.
This occurs when the baud rate (for serial connections) or the emulation driver is mismatched. Ensure your software is sending raw text or ESC/POS commands, and that the driver selected is strictly for 58mm POS, not a standard desktop inkjet printer.
The hardware supports Linux systems. As there is no specific "JK-5801H" Linux driver, you must use the built-in CUPS (Common UNIX Printing System). thermal printer jk-5801h driver
Do rely on vendor DLL — use direct ESC/POS:
Select your preferred language and accept the license agreement. 3. Configuring Printer Settings This is usually a port mismatch
Connect the from the printer to an open USB port on your PC. Turn on the printer's power switch. Step 2: Running the Driver Installer
Follow these platform-specific instructions to connect your printer to your operating system. How to Install the JK-5801H Driver on Windows (10/11) If it is checked on LPT1 or COM1
Add the printer, selecting the or generic Text-Only / Raw driver profile. Optimizing Driver Settings for Best Results