Extract all IO ports, which can be used as a minimal system development board or a fixture for small batch burning
instructions:
1. Download the corresponding CH340 serial chip driver according to the operating system and install it.
2. Download the official Flash download tool ESPFlashDownloadTool
3. Automatic firmware download: Press in the module, insert a USB cable for power supply, use Flash download tool to configure the corresponding burning parameters, click START download to start firmware burning, and the downloader will automatically reset and put the module into burning mode.
Manual firmware download: Press in the module, insert a USB cable for power supply, open the burning software, configure the corresponding burning parameters, long press the burning button, then short press the reset button, click START download to start firmware burning