Book Image

Hands-On Internet of Things with Blynk

By : Pradeeka Seneviratne
Book Image

Hands-On Internet of Things with Blynk

By: Pradeeka Seneviratne

Overview of this book

Blynk, known as the most user-friendly IoT platform, provides a way to build mobile applications in minutes. With the Blynk drag-n-drop mobile app builder, anyone can build amazing IoT applications with minimal resources and effort, on hardware ranging from prototyping platforms such as Arduino and Raspberry Pi 3 to industrial-grade ESP8266, Intel, Sierra Wireless, Particle, Texas Instruments, and a few others. This book uses Raspberry Pi as the main hardware platform and C/C++ to write sketches to build projects. The first part of this book shows how to set up a development environment with various hardware combinations and required software. Then you will build your first IoT application with Blynk using various hardware combinations and connectivity types such as Ethernet and Wi-Fi. Then you'll use and configure various widgets (control, display, notification, interface, time input, and some advanced widgets) with Blynk App Builder to build applications. Towards the end, you will learn how to connect with and use built-in sensors on Android and iOS mobile devices. Finally you will learn how to build a robot that can be controlled with a Blynk app through the Blynk cloud and personal server. By the end of this book, you will have hands-on experience building IoT applications using Blynk.
Table of Contents (10 chapters)

Creating a project

First, create a new project as discussed in previous chapters, and name it Controllers. You will receive a new auth token. However, if you would like to use the workspace of the project LED controller you built in Chapter 2, Building Your First Blynk Application, just rename it Controllers. This will allow you to use the same auth token without applying a new one.

Use the following steps to clean and rename the project:

  1. In edit mode, first delete the Button widget. To delete, tap the Button widget, then in the Button Settings page, tap Delete. When prompted, tap OK to continue. Now your canvas is empty:
Deleting the Button widget
  1. Then, tap the nut icon to open the Project Settings.
  2. In the Project Name textbox, change the project name to Controllers. Scroll down the page and tap LED Controller under Devices to rename the device:
Renaming the project
  1. Tap...