#ESP32CAM – Flash on / Flash off πŸ”¦πŸ”¦πŸ”¦

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

Platform IO new project or ESP32 CAM

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()
{
}

Full project working demo

ESP32Cam Flash demo

Happy coding!

Greetings

El Bruno

More posts in my blog ElBruno.com.


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