ESP32-CAM automatic download and IO expansion board

An essential companion for ESP-32CAM development, it integrates automatic downloading, power supply, serial port debugging, and IO extraction functions.
The baseboards bought on Taobao are always not fully functional. The restart button is just a decoration and cannot reset the microcontroller at all. Or you need to manually press and hold the boot button to download. Some even cannot exit the download mode.
This project can be downloaded completely automatically without any manual operation. At the same time, the reset button works effectively and can correctly restart the esp32-cam module. It has the function of communicating with the module serial port through USB, which facilitates development and debugging.
At the same time, the wiring arrangement of this backplane is compact and compact, which can lead to all esp32-cam pins without increasing the volume, making it convenient to plug in other components for project development.
The DIP switch at the bottom can control the on and off of the automatic download circuit and the esp32-cam module. It can be turned on when the automatic download function is needed, and can be turned off when automatic downloading is not needed.