Exploring the low cost WiFi module About This Book * Leverage the ESP8266's on-board processing and storage capability * Get hand- on experience of working on the ESP8266 Arduino Core and its various libraries * A practical and enticing recipe-based book that will teach you how to make your environment smart using the ESP8266 Who This Book Is For This book is targeted at IOT enthusiasts who are well versed with electronics concepts and have a very basic familiarity with the ESP8266. Some experience with programming will be an advantage. What You Will Learn * Measure data from a digital temperature and humidity sensor using the ESP8266 * Explore advanced ESP8266 functionalities * Control devices from anywhere in the world using MicroPython * Troubleshoot issues with cloud data monitoring * Tweet data from the Arduino board * Build a cloud-connected power-switch with the ESP8266 * Create an ESP8266 robot controlled from the cloud In Detail The ESP8266 Wi-Fi Module is a self contained System on Chip (SOC) with an integrated TCP/IP protocol stack and can give any microcontroller access to your Wi-Fi network. It is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. This book contains practical recipes that will help you master all ESP8266 functionalities. You will start by configuring and customizing the chip in line with your requirements. Then you will focus on core topics such as on-board processing, sensors, GPIOs, programming, networking, integration with external components, and so on. We will also teach you how to leverage Arduino using the ESP8266 and you'll learn about its libraries, file system, OTA updates, and so on. The book also provide recipes on web servers, testing, connecting with the cloud, and troubleshooting techniques. Programming aspects include MicroPython and how to leverage it to get started with the ESP8266. Towards the end, we will use these concepts and create an interesting project (IOT). By the end of the book, readers will be proficient enough to use the ESP8266 board efficiently. Style and approach This recipe-based book will teach you to build projects using the ESP8266.

Develop mobile virtual reality apps using the native Google Cardboard SDK for Android About This Book * Learn how to build practical applications for Google's popular DIY VR headset * Build a reusable VR graphics engine on top of the Cardboard Java SDK and OpenGL ES graphics libraries * The projects in this book will showcase a different aspect of Cardboard development-from 3D rendering to handling user input Who This Book Is For The book is for established Android developers with a good knowledge level of Java. No prior OpenGL or graphics knowledge is required. No prior experience with Google Cardboard is expected, but those who are familiar with Cardboard and are looking for projects to expand their knowledge can also benefit from this book. What You Will Learn * Build Google Cardboard virtual reality applications * Explore the ins and outs of the Cardboard SDK Java classes and interfaces, and apply them to practical VR projects * Employ Android Studio, Android SDK, and the Java language in a straightforward manner * Discover and use software development and Android best practices for mobile and Cardboard applications, including considerations for memory management and battery life * Implement user interface techniques for menus and gaze-based selection within VR * Utilize the science, psychology, mathematics, and technology behind virtual reality, especially those pertinent to mobile Cardboard VR experiences * Understand Cardboard VR best practices including those promoted by Google Design Lab. In Detail Google Cardboard is a low-cost, entry-level media platform through which you can experience virtual reality and virtual 3D environments. Its applications are as broad and varied as mobile smartphone applications themselves. This book will educate you on the best practices and methodology needed to build effective, stable, and performant mobile VR applications. In this book, we begin by defining virtual reality (VR) and how Google Cardboard fits into the larger VR and Android ecosystem. We introduce the underlying scientific and technical principles behind VR, including geometry, optics, rendering, and mobile software architecture. We start with a simple example app that ensures your environment is properly set up to write, build, and run the app. Then we develop a reusable VR graphics engine that you can build upon. And from then on, each chapter is a self-contained project where you will build an example from a different genre of application, including a 360 degree photo viewer, an educational simulation of our solar system, a 3D model viewer, and a music visualizer. Given the recent updates that were rolled out at Google I/O 2016, the authors of Cardboard VR Projects for Android have collated some technical notes to help you execute the projects in this book with Google VR Cardboard Java SDK 0.8, released in May 2016. Refer to the article at https://www.packtpub.com/sites/default/files/downloads/GoogleVRUpdateGuideforCardbook.pdf which explains the updates to the source code of the projects. Style and approach This project based guide is written in a tutorial-style project format, where you will learn by doing. It is accompanied by in-depth explanations and discussions of various technologies, and provides best practices and techniques.

About LICP - Leading by Example Licp (Library Instructional Computer Process) has set designs to aid individuals by getting them the results they need quickly. Our step by step guidance and picture system takes the guess work out and shows you exactly where to point and click. LICP is self-teaching, meaning after a short period you will find yourself recalling these step from memory. Inside this book, you will find computer help on Resume, Microsoft Word, Adobe, printing tips, email, /websites and much more. Everyone can learn something new out of the LICP helpful guide, happy computer learning your Library Volunteer Frank -N.

Find out how to transform your Arduino device into an awesome secret agent gadget with this course, taking in everything from robotics to remote control cameras About This Book * This course won't just teach you. It will help you apply your knowledge so you can get creative - quickly! * Find out how to make a computer interact with the real-world - you'll be learning the basics of IoT without realizing it. * Robots. A sound controlled Christmas tree. This course proves anything is possible with an Arduino! Who This Book Is For Seeking inspiration? This course will help you get creative with your Arduino quickly. What You Will Learn * Find out how to explore the full potential of your tiny Arduino * Find out how to bridge the gap between the real world and software, as you gather and visualize data from the environment * Create simple servers to allow communication to occur * Transform your Arduino into a GPS tracker * Use the Arduino to monitor top secret data * Build a complete spy robot! In Detail An Arduino might be a tiny computer but it can be used as the foundation for a huge range of projects. In this course, we'll show you how just some of the projects that are possible with an Arduino. From robotics to secret agent gadgets, we're pretty confident that this course will get you thinking creatively - and inspire you to create your very own new projects using the Arduino hacking skills you learn. This course, combines both text and video content - it's made up of three modules to help organize your learning. In the first module we'll show you how to build three different Arduino projects. All of these will not only get you up and running with something practical, they'll also help you better understand how the Arduino works. Find out how to develop a home automation system and even build a robot! In the second module we'll go one step further to help you get creative as you learn how to program LEDs with your Arduino. You'll find out how to build a mood lamp and a remote-controlled TV backlight, before going on to make a sound controlled LED Christmas tree that makes use of sound visualization. Finally, the third module takes you from stylish design into espionage, as you learn how to create neat secret agent gadgets with your Arduino. Find out how to build an alarm system, a fingerprint sensor, even open a lock with a text message. And that's not all - but to find out more you'll have to dive in! This Learning Path combines some of the best that Packt has to offer in one complete, curated package. It includes content from the following Packt products: ? Arduino By Example by Adith Jagadish Boloor ? Arduino BLINK Blueprints by Samarth Shah, Utsav Shah ? Arduino for Secret Agents by Marco Shwartz Style and approach Combining both video and text and built from some of Packt's very best Arduino content, this course comprises of three modules covering a range of projects. It's completely focused on helping the user get creative as quickly as possible so they can explore what's possible with Arduino themselves.

Build amazing Internet of Things projects using the ESP8266 Wi-Fi chip About This Book * Get to know the powerful and low cost ESP8266 and build interesting projects in the field of Internet of Things * Configure your ESP8266 to the cloud and explore the networkable modules that will be utilized in the IoT projects * This step-by-step guide teaches you the basics of IoT with ESP8266 and makes your life easier Who This Book Is For This book is for those who want to build powerful and inexpensive IoT projects using the ESP8266 WiFi chip, including those who are new to IoT, or those who already have experience with other platforms such as Arduino. What You Will Learn * Control various devices from the cloud * Interact with web services, such as Twitter or Facebook * Make two ESP8266 boards communicate with each other via the cloud * Send notifications to users of the ESP8266, via email, text message, or push notifications * Build a physical device that indicates the current price of Bitcoin * Build a simple home automation system that can be controlled from the cloud * Create your own cloud platform to control ESP8266 devices In Detail 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. Style and approach This is a step-by-step guide that provides great IOT projects with ESP8266. All the key concepts are explained details with the help of examples and demonstrations of the projects.

Over 90 hands-on recipes that will employ Nagios Core as the anchor of monitoring on your network About This Book * Master the advanced configuration techniques of Nagios Core to model your network better by improving hosts, services, and contacts * Filter and improve the notifications that Nagios Core sends in response to failed checks, which can greatly assist you when diagnosing problems * Pull Nagios Core's data into a database to write clever custom reports of your own devise Who This Book Is For If you are a network or system administrator and are looking for instructions and examples on working with Nagios Core, then this book is for you. Some basic shell command-line experience is required, and some knowledge of scripting would be helpful when we discuss how plugins work. What You Will Learn * Manage the configuration of Nagios Core with advanced techniques to achieve fine detail in your checks * Find, install, and even write your own check plugins * Filter notifications to send them to the right people or programs at the right time * Work around difficult network accessibility issues and delegate checks to other machines * Tweak a Nagios Core server to achieve both high performance and redundancy in case of disaster * Process the results of checks performed by other machines to monitor backups and similar processes * Extend Nagios Core to allow advanced scripting, reporting, and network visualization behavior In Detail Nagios Core is an open source monitoring framework suitable for any network that ensures both internal and customer-facing services are running correctly and manages notification and reporting behavior to diagnose and fix outages promptly. It allows very fine configuration of exactly when, where, what, and how to check network services to meet both the uptime goals of your network and systems team and the needs of your users. This book shows system and network administrators how to use Nagios Core to its fullest as a monitoring framework for checks on any kind of network services, from the smallest home network to much larger production multi-site services. You will discover that Nagios Core is capable of doing much more than pinging a host or to see whether websites respond. The recipes in this book will demonstrate how to leverage Nagios Core's advanced configuration, scripting hooks, reports, data retrieval, and extensibility to integrate it with your existing systems, and to make it the rock-solid center of your network monitoring world. Style and approach Each chapter contains a set of step-by-step recipes to perform an example of a commonly performed task related to network administration. The book begins by focusing closely on the properties and configuration of Nagios Core itself, and gradually moves on to other pieces of software that can support, manage, and extend the system.

An easy-to-follow Apache Hadoop administrator's guide filled with practical screenshots and explanations for each step and configuration. This book is great for administrators interested in setting up and managing a large Hadoop cluster. If you are an administrator, or want to be an administrator, and you are ready to build and maintain a production-level cluster running CDH5, then this book is for you.

Investigate and solve problems with Nginx-powered websites using a deep understanding of the underlying principles About This Book * Solve problems with your Nginx-powered websites before your audience notices anything * Peek into the Nginx architecture and gain knowledge that will help you be valuable to you in the long run * Gain knowledge of different types of problems in a step-by-step way Who This Book Is For The book is for technical specialists who already use Nginx to serve web pages for their users. Whether you are an experienced system administrator or a new professional, this book will help you do your job in the most efficient way. What You Will Learn * Detect and investigate problems with your web servers * Create correct and professional configuration files * Get an in-depth understanding of the web server software * Interpret Nginx log files easily and with actionable insights * Make your websites respond as fast as possible * Prevent problems by setting up proper monitoring and alerts In Detail Nginx is clearly winning the race to be the dominant software to power modern websites. It is fast and open source, maintained with passion by a brilliant team. This book will help you maintain your Nginx instances in a healthy and predictable state. It will lead you through all the types of problems you might encounter as a web administrator, with a special focus on performance and migration from older software. You will learn how to write good configuration files and will get good insights into Nginx logs. It will provide you solutions to problems such as missing or broken functionality and also show you how to tackle performance issues with the Nginx server. A special chapter is devoted to the art of prevention, that is, monitoring and alerting services you may use to detect problems before they manifest themselves on a big scale. The books ends with a reference to error and warning messages Nginx could emit to help you during incident investigations. Style and approach This comprehensive tutorial on Nginx troubleshooting takes an practical approach to guiding you through common issues in Nginx server.

by David C Nagel In the last five years visualization has gone from the lab to become a desktop technology for many scientists. Images and 3-D renderings of data sets and mathematical models have evolved from the high-priced hardware and customized software of graphics professionals to low-cost, off-the-shelf commercial software running on personal computers. fu such, scientific visualization has taken its place beside mathematical modeling as an everyday means of interacting with one's data. This has significantly changed both the amount and the quality of information that scientists are able to extract from raw data, and has effectively established a new paradigm for scientific computing. In addi tion, new, low-cost hardware and software technologies such as CD-ROMs, digital video, and Apple's QuickTime time-based media of image and and compression technologies have enabled large amounts animation data to be easily accessible to the average researcher or teacher through the personal computer. However, little has been done in the way of providing a context within which the researcher or teacher could learn which approaches might be best suited for a given problem. Furthermore, most scientists are unfamiliar with the terminology and concepts in modern computer graphics, which simply steepens the learning curve for them to apply the new technologies to their work. fu a result, researchers and teachers are not yet taking full advantage of the new paradigm.