Escpos Thermal ZJ-58 Python Code128 Barcode print shows nothing

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from escpos.printer import Usb

p = Usb(0x0416, 0x5011, 0, 0x81, 0x03)
p.text("=================\\n")
#p.image("./barcode/barcode.png")
#p.barcode(\'


                      
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