Book Image

Internet of Things with ESP8266

By : Marco Schwartz
Book Image

Internet of Things with ESP8266

By: Marco Schwartz

Overview of this book

The Internet of Things (IoT) is the network of objects such as physical things embedded with electronics, software, sensors, and connectivity, enabling data exchange. ESP8266 is a low cost WiFi microcontroller chip that has the ability to empower IoT and helps the exchange of information among various connected objects. ESP8266 consists of networkable microcontroller modules, and with this low cost chip, IoT is booming. This book will help deepen your knowledge of the ESP8266 WiFi chip platform and get you building exciting projects. Kick-starting with an introduction to the ESP8266 chip, we will demonstrate how to build a simple LED using the ESP8266. You will then learn how to read, send, and monitor data from the cloud. Next, you’ll see how to control your devices remotely from anywhere in the world. Furthermore, you’ll get to know how to use the ESP8266 to interact with web services such as Twitter and Facebook. In order to make several ESP8266s interact and exchange data without the need for human intervention, you will be introduced to the concept of machine-to-machine communication. The latter part of the book focuses more on projects, including a door lock controlled from the cloud, building a physical Bitcoin ticker, and doing wireless gardening. You’ll learn how to build a cloud-based ESP8266 home automation system and a cloud-controlled ESP8266 robot. Finally, you’ll discover how to build your own cloud platform to control ESP8266 devices. With this book, you will be able to create and program Internet of Things projects using the ESP8266 WiFi chip.
Table of Contents (15 chapters)
14
Index

Monitoring the temperature and humidity

In this second project of the chapter, we are going to do something different. We will monitor the temperature and humidity of the plant from the cloud dashboard that we already used earlier in the chapter. We are first going to configure the board, and then set up the cloud dashboard.

As we already saw how to use the aREST cloud platform earlier in the book, I will only highlight the most important parts of the code.

The first step is to include all the required libraries, including the aREST library:

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <aREST.h>
#include <SHT1x.h>

Then, we give an ID to our device:

char* device_id = "gveie2y5";

As usual, you also need to put your Wi-Fi name and password here:

const char* ssid = "your-wifi";
const char* password = "your-password";

In the loop() function of the sketch, we make the measurements from the sensor, and handle the connection with the...