Book Image

Internet of Things Projects with ESP32

By : Agus Kurniawan
Book Image

Internet of Things Projects with ESP32

By: Agus Kurniawan

Overview of this book

ESP32 is a low-cost MCU with integrated Wi-Fi and BLE. Various modules and development boards-based on ESP32 are available for building IoT applications easily. Wi-Fi and BLE are a common network stack in the Internet of Things application. These network modules can leverage your business and projects needs for cost-effective benefits. This book will serve as a fundamental guide for developing an ESP32 program. We will start with GPIO programming involving some sensor devices. Then we will study ESP32 development by building a number of IoT projects, such as weather stations, sensor loggers, smart homes, Wi-Fi cams and Wi-Fi wardriving. Lastly, we will enable ESP32 boards to execute interactions with mobile applications and cloud servers such as AWS. By the end of this book, you will be up and running with various IoT project-based ESP32 chip.
Table of Contents (12 chapters)

Controlling ESP32 from a mobile application

In this section, we will build a project to enable an ESP32 board to work with mobile devices. We can create Wi-Fi services on an ESP32 board to allow mobile devices to perform tasks on ESP32, such as turning on a lamp and turning off a motor. Our scenario is described in Figure 9.1. For a mobile device platform, we use the Android application.

The way in which a smart mobile project works can be seen in the following diagram:

Figure 9.1: A general design for a smart mobile project

We can control three lamps with an ESP32 board through relay modules as shown in the preceding diagram. For a simple demonstration, we only use three LEDs for lamp simulation. We will expose three HTTP services: /ping, /state, and /lamp:

  • The /ping HTTP request is used to perform an echo test.
  • The /state HTTP request is used to obtain all the LED states that...