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ESP8266 Internet of Things Cookbook

You're reading from ESP8266 Internet of Things Cookbook Over 50 recipes to help you master ESP8266 functionality

Product type Paperback

Published in Apr 2017

Publisher Packt

ISBN-13 9781787288102

Length 268 pages

Edition 1st Edition

Tools

ESP8266

Concepts

Robotics

Author (1):

Marco Schwartz

View More author details

Table of Contents (9) Chapters

Preface

1. Configuring the ESP8266

2. Your First ESP8266 Projects FREE CHAPTER

3. More ESP8266 Functions

4. Using MicroPython on the ESP8266

5. Cloud Data Monitoring

6. Interacting with Web Services

7. Machine to Machine Interactions

Index

Automated light control

In this recipe, we will look at automated light control using M2M. We will work on a project that will turn a light source on or off, depending on the light intensity of the surrounding environment. Two ESP8266 boards will be used to accomplish this. One of them will have a light dependent resistor, and the other will have a relay connected to it.

Getting ready

You will need the following hardware components:

ESP8266 board
USB cable
Light dependent resistor (LDR) (https://www.sparkfun.com/products/9088)
10 kΩ resistor
Relay module (http://www.dx.com/p/arduino-5v-relay-module-blue-black-121354)
Breadboard
Jumper wires

Connect the analog input of the ESP8266 board to an LDR connected to a 10 kΩ resistor in a voltage divider circuit, as shown in the following image. This setup is going to act as the input for the system:

As for the output of the system, connect a relay to GPIO2 of the other ESP8266 board. The connection will be via an NPN transistor such as the 2N222, and a diode...

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Authors (1)

Marco Schwartz

Marco Schwartz

Marco Schwartz is an electrical engineer, entrepreneur, and blogger. He has a master's degree in electrical engineering and computer science from Supélec, France, and a master's degree in micro engineering from the Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. He has more than five years' experience working in the domain of electrical engineering. Marco's interests center around electronics, home automation, the Arduino and Raspberry Pi platforms, open source hardware projects, and 3D printing. He has several websites about the Arduino, including the Open Home Automation website, which is dedicated to building home automation systems using open source hardware. Marco has written another book on home automation and the Arduino, called Home Automation With Arduino: Automate Your Home Using Open-source Hardware. He has also written a book on how to build Internet of Things projects with the Arduino, called Internet of Things with the Arduino Yun, by Packt Publishing.

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