3.Common Problems

1. No response after uploading the code

（1）Please check whether there is a path in the circuit. You can use a multimeter to detect. （2）Please check whether the wiring connection is correct （3）Please check whether the component is good, you can use a multimeter to check

2. Computers can’t recognize the USB port

（1）Please ensure whether the driver is installed （2）Please check whether the USB wire is in good condition

3. The program can’t be uploaded

(1) Check whether the board type and COM port are correct