Book Image

Expert Delphi

By : Paweł Głowacki
Book Image

Expert Delphi

By: Paweł Głowacki

Overview of this book

Delphi is the most powerful Object Pascal IDE and component library for cross-platform native app development. It enables building natively compiled, blazingly fast apps for all major platforms including Android, iOS, Windows, Mac, and Linux. If you want to build server-side applications, create web services, and have clear GUIs for your project, then this book is for you. The book begins with a basic primer on Delphi helping you get accustomed to the IDE and the Object Pascal language and will then quickly move on to advanced-level concepts. Through this book, we’ll help you understand the architecture of applications and will teach you the important concepts of the FireMonkey library, show you how to build server-side services, and enable you to interact with the Internet of Things. Towards the end, you will learn to integrate your app with various web services and deploy them. By the end of the book, you will be able to build powerful, cross-platform, native apps for iOS and Android with a single code base.
Table of Contents (14 chapters)

Understanding BLE

One of the most important communication protocols for IoT is Bluetooth. In fact, there are two different Bluetooth technologies. The classic Bluetooth and the newer, BLE, sometimes called smart Bluetooth; Bluetooth LE, or just BLE for short. The classic Bluetooth is useful for data streaming and provides data transfer rates up to 2 Mbps. It is commonly used in cars, especially in hands-free headsets. It has much higher data transfer rates as compared to BLE, but also much higher energy consumption.

BLE protocol has been designed with very low power consumption in mind, and uses a different set of radio techniques than classic Bluetooth. Data transfer rates in Bluetooth LE are relatively low, less than 100 Kbps. A big advantage of smart Bluetooth is the very fast connection time, typically just a few milliseconds, because there is no pairing process involved,...