Got this board from Taobao. Follow https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions.
schematic：https://pan.baidu.com/s/1sNCK3Z4ZXfziKoF-ZYDMiw Code：pxc4
doc：https://pan.baidu.com/s/1SJFlgyIenaM4-TfmT1eLtQ Code：NICE or download here
If you failed to run the code for this. Hold “Boot” button while uploading the code
If you meet “the port doesn’t exist”, do:
$ sudo usermod -a -G dialout peter
$ sudo chmod a+rw /dev/ttyUSB0
