VCC -- 5V
GND -- G
SCL -- TX3
SDA -- RX3

1.Ensure the machine has been updated to the latest software version
2.Access the console through the screen: Main Interface → More → Console → Enter "plr" → Send
3.Restart the printer
Open the slicing software
RESUME_ENABLE to Printer G-code → Printer Start G-code
LOG_Z H=[layer_z] L=[layer_height] to Printer G-code → Before Layer Change G-code