#ESP32CAM – Flash on / Flash off 🔦🔦🔦

Hi !

Let’s start a series of posts using an ESP32 CAM board. I had this one from Amazon Canada.

Wobekuy ESP32-CAM-MB WiFi Development Board OV2640 Camera Module -USB Interface CH340G USB to Serial Port

I choosed this one, because it will avoid me the pain of wiring.

So, 1st test, let’s turn the Flash ON and then OFF.

Let’s start creating a new PlatformIO project, and selecting the right board: AI Thinker ESP-32CAM

Once the project is created our ini file contains the following information:

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:esp32cam]
platform = espressif32
board = esp32cam
framework = arduino

And now let’s add some code to make the flash work. And, my only note here is that the Pin is 4.

	// Copyright (c) 2022
	// Author : Bruno Capuano
	// Create Time : 2022 March
	// Change Log :
	// – Turn ON and OFF the Flash on an ESP32-CAM board
	//
	// The MIT License (MIT)
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy
	// of this software and associated documentation files (the "Software"), to deal
	// in the Software without restriction, including without limitation the rights
	// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	// copies of the Software, and to permit persons to whom the Software is
	// furnished to do so, subject to the following conditions:
	//
	// The above copyright notice and this permission notice shall be included in
	// all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	// THE SOFTWARE.

	#include <Arduino.h>

	// ledPin refers to ESP32-CAM GPIO 4 (flashlight)
	#define FLASH_GPIO_NUM 4

	void setup()
	{
	// initialize digital pin ledPin as an output
	pinMode(FLASH_GPIO_NUM, OUTPUT);

	digitalWrite(FLASH_GPIO_NUM, HIGH);
	delay(2000);
	digitalWrite(FLASH_GPIO_NUM, LOW);
	delay(2000);
	}

	void loop()
	{
	}

view raw esp32camflashdemo.cpp hosted with ❤ by GitHub

Full project working demo

Happy coding!

Greetings

El Bruno

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