The ESP32-CAM is a extremely tiny low power consumption camera module based on ESP32 camera module set with the ESP32-S chip varies between approximately 2.20$ and $10.
Competition OV2640 camera, and other GPIO´s to connect peripherals, it includes a micro SD card slot that can be pretty useful to save images or Videos recorded to the ESP32 PCBA. Power and Voltage of the ESP32-CAM for example even a small 3.7V, 850mAh rechargeable battery would be capable to power the ESP32 main-board in sleep modes for approximately 12.5 hours. Light-sleep-modes can run up to 1000 hours.
How to Install ESP32-CAM with Arduino Start Arduino IDE and connect your board to a USB port. Install the Esp32 library by clicking on “Tools - Board - Boards Manager - Search for Esp32 - Install Esp32 from Espressif Systems”. Select right board: “Tools - Board - ESP32 Arduino - AI Thinker ESP32-CAM”
For getting ready with the ESP32-CAM Module, build a connection between FTDI Module and ESP32 CAM module. Connect the 5V & GND Pin of ESP32 to 5V & GND of FTDI Module. Similarly, connect the Rx to UOT and Tx to UOR Pin. Do not forget to short the IO0 and GND Pin together, this is essential. A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole)
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