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)


The Twitter widget allows you to connect your Twitter account with Blynk and send tweets from your Raspberry Pi hardware. However, the Twitter widget has the following limitations:

  • You can't tweet the same message more than once
  • Only one tweet per 15 seconds is allowed

Adding a Twitter widget

These steps will show you how to add a Twitter widget onto your canvas:

  1. In the Widget Box, tap Twitter under NOTIFICATIONS:
Twitter widget
  1. The Twitter widget will be added to the canvas. However, you can't add more than one Twitter widget to a project. A single Twitter widget can handle all the tweets sent from your Raspberry Pi. The Twitter widget consumes 0 units of energy from your energy bank:
Twitter widget...