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)

Setting up a Blynk server on Raspberry Pi

The following steps will show you how to set up a Blynk server on a Raspberry Pi. The Blynk server supports all versions of Raspberry Pi boards. However, Raspberry Pi 3 provides better performance for running dedicated servers than previous boards.

For testing purposes, you can use the same Raspberry Pi board to run both the server and the firmware for the hardware:

  1. Using PuTTY, log in to your Raspberry Pi through SSH.
  2. Install Java 8 using the following command:
pi@raspberrypi:~ $sudo apt-get install oracle-java8-jdk
  1. Verify the Java version using the following command:
pi@raspberrypi:~ $ java -version
  1. You will get the following output:
java version "1.8.0_65"
Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot(TM) Client VM (build 25.65-b01, mixed mode)
  1. Download the Blynk server JAR file using the following...