2.7.3 Write the firmware to the SD/TF card, then insert the SD/TF card into the
printer, click Next step.
2.7.4 After the printer is powered on, the Creality Sonic Pad will automatically
connect to the printer. (the firmware in SD/TF will be automatically flashed after
the printer is powered on)
2.7.5 After the printer firmware is flashed, click Restart.
2.8 Printer firmware flashing (upgrade via USB cable)
2.8.1 Select the printer (motherboards with chips such as atmega 2560 cannot be
upgraded via SD/TF card)
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