Drawn based on the Espressif Kai 32 development board schematic and PCB, some USB to TTL chips were changed to CH340C to save costs. The pin size is the same as the 32 development board sold by Espressif Systems.
CH340C application circuit
1117-3.3 Application circuit
Below is a video of burning the firmware. The flash firmware has been burned before burning and it is running normally. What is burned in the video is the ESP 32 grbl firmware development board, which is automatically burned without pressing the BOOT button. After the burning is completed, the program runs normally! ! Hope it helps those who need this! ! If you think it's good, please give it a like, thank you! ! !
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