[Color Temperature and Brightness Compensation Laboratory]:[Controlling LED Brightness]

This is the simple example of setting brightness of LED.

This hands-on lab guide is intended for the Beginners.

The user need to know:

• Basic knowledge of ESP8266 NodeMCU v.2.
• ESP8266 Arduino programming,
• Basic knowledge of I2C Interface.
• Basic knowledge of I2C programming using Arduino I2C library.

All important information including address of devices are enclosed in description of laboratory. In that scenario, the user should write a program in Arduino platform which turns on and off LEDs for the specified time 15 seconds. LED brightness can be controlled by setting variable “level” from 0 to 4095.

Describe expected result when scenario is finished. As a result user can control in cameras program execution.

In the beginning, both cameras must show that all LEDs are off.

First load an example project, include appropriate libraries and declare variable ledDriver

#include <Wire.h>
#include <PCA9685.h>
 
PCA9685 ledDriver; 

Please scan I2C bus and check if PWM controller is present.

Write a programm which:

• Turn LED1 placed on dark side to warm-white fully on for 15 seconds
• Turn LED1 off
• Turn LED1 to cold-white fully on for 15 seconds
• Turn lED1 off
• Turn LED2 placed on bright side to warm-white fully on for 15 seconds
• Turn LED2 off
• Turn LED2 to cold-white fully on for 15 seconds
• Turn lED2 off

ledDriver.setLEDDimmed(number,level)

Repeat step 3 ten times.

Both cameras must show LED blinking in given periods of time.

This Intellectual Output was implemented under the Erasmus+ KA2: Strategic Partnership in the Field of Education, Training, and Youth - Higher Education.
Project IOT-OPEN.EU – Innovative Open Education on IoT: improving higher education for European digital global competitiveness.
Project number: 2016-1-PL01-KA203-026471.

Erasmus+ Disclaimer
This project has been funded with support from the European Commission.
This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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