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 (20 chapters)
Internet of Things with ESP8266
About the Author
About the Reviewer

Connecting the ESP8266 board to your cloud server

We now actually want to test the server that we just deployed on the cloud. To do so, we are going to see how to configure the hardware we built earlier so it can connect to your own cloud server:

  1. First, we need to include all the required libraries:

    #include <ESP8266WiFi.h>
    #include <PubSubClient.h>
    #include <aREST.h>
    #include "DHT.h"
  2. Next, we define which pin the DHT sensor is connected to:

    #define DHTPIN 4
    #define DHTTYPE DHT11
  3. Next, we create an instance of the DHT sensor:

    DHT dht(DHTPIN, DHTTYPE, 15);
  4. After that, we create clients to connect to your cloud server:

    WiFiClient espClient;
    PubSubClient client(espClient);
  5. Next, we create the aREST instance. This is where you need to pass the IP address of your remote cloud server as an argument:

    aREST rest = aREST(client, "");
  6. You also need to give an ID to your current device:

    char* device_id = "01e47f";
  7. Next, set the Wi-Fi name and password of the sketch:

    const char* ssid...