Book Image

ESP8266 Internet of Things Cookbook

By : Marco Schwartz
Book Image

ESP8266 Internet of Things Cookbook

By: Marco Schwartz

Overview of this book

The ESP8266 Wi-Fi Module is a self contained System on Chip (SOC) with an integrated TCP/IP protocol stack and can give any microcontroller access to your Wi-Fi network. It is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. This book contains practical recipes that will help you master all ESP8266 functionalities. You will start by configuring and customizing the chip in line with your requirements. Then you will focus on core topics such as on-board processing, sensors, GPIOs, programming, networking, integration with external components, and so on. We will also teach you how to leverage Arduino using the ESP8266 and you'll learn about its libraries, file system, OTA updates, and so on. The book also provide recipes on web servers, testing, connecting with the cloud, and troubleshooting techniques. Programming aspects include MicroPython and how to leverage it to get started with the ESP8266. Towards the end, we will use these concepts and create an interesting project (IOT). By the end of the book, readers will be proficient enough to use the ESP8266 board efficiently.
Table of Contents (15 chapters)
ESP8266 Internet of Things Cookbook
About the Author
About the Reviewer
Customer Feedback

M2M alarm system

In the previous chapters, we looked at the different ways of achieving M2M communication between two ESP8266 boards. In this recipe, we will look at how to implement M2M communication in an IoT project. To do that, we will create a simple M2M alarm system with one ESP8266 board connected to a DHT11 sensor and the other connected to a buzzer. The alarm will be triggered when the temperature reading drops below 20 degrees Celsius.

Getting ready

You will need the following hardware components:

The DHT11 pin configuration is shown in the following figure:

  1. First, mount the ESP8266 board and the DHT11 sensor onto the breadboard.

  2. Connect a 10 kΩ pull up resistor to the DHT11 data pin and connect the VCC pin and GND pin to the 3V pin and GND pin of the ESP8266 board, respectively.

  3. Finally, connect the data pin of the DHT11 to GPIO2 of the ESP8266 board...