That LED is internally connected to GPIO 4. The ESP32-CAM has a very bright built-in LED that can work as a flash when taking ![]() You can take a look at the ESP32 pinout guide to see the features of these pins.Īll these GPIOs are RTC and support ADC: GPIOs 2, 4, 12, 13, 14, and 15. If you’re not using the microSD card, you can use these pins as regular inputs/outputs. The following pins are used to interface with the microSD card when it is on operation. To make the ESP32 run “normally”, you just need to disconnect GPIO 0 from GND. GPIO 0 connected to GND » ESP32-CAM in flashing mode.When GPIO 0 is connected to GND, the ESP32 goes into flashing mode and you can upload code to the board. This GPIO is internally connected to a pull-up 10k Ohm resistor. GPIO 0 determines whether the ESP32 is in flashing mode or not. However, you won’t be able to open the Serial Monitor and see if everything is going well with your setup. ![]() You can use GPIO 1 and GPIO 3 to connect other peripherals like outputs or sensors after uploading the code. Learn how to upload code to the ESP32-CAM AI-Thinker. The best way to upload code to the ESP32-CAM is using an FTDI programmer. Because the ESP32-CAM doesn’t have a built-in programmer, you need to use these pins to communicate with the board and upload code. GPIO 1 and GPIO 3 are the serial pins (TX and RX, respectively). ![]() If you want to have an output of 5V on the VCC pin, you need to unsolder that connection and solder the 5V pads. If you look closely, you should have a jumper on the 3.3V pads.
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