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Full Stack Web Development with Raspberry Pi 3

You're reading from   Full Stack Web Development with Raspberry Pi 3 Build complex web applications with a portable computer

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Product type Paperback
Published in Aug 2017
Publisher Packt
ISBN-13 9781788295895
Length 214 pages
Edition 1st Edition
Languages
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Author (1):
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Soham Kamani Soham Kamani
Author Profile Icon Soham Kamani
Soham Kamani
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Table of Contents (13) Chapters Close

Preface 1. Getting Started on the Raspberry Pi FREE CHAPTER 2. Getting Up-and-Running with Web Development on the Raspberry Pi 3. Running a Node Server on the Pi 4. Extracting Information from the GPIO Pins 5. Retrieving Sensor Readings from the Server 6. Creating a Web Page to Display Sensor Data 7. Enhancing Our UI - Using Interactive Charts 8. SQLite - The Fast and Portable Database 9. Integrating SQLite into Our Application 10. Making our Application Real Time with Web Sockets 11. Deploying our application to Firebase 12. Using Firebase APIs to Update Our Application

Running queries with node

In the previous chapter, we executed all our queries in a file called .sqlite.db. We will use this same file to demonstrate how to execute queries and receive their results inside our node process:

    /**
     * Import the SQLite library, and initialize the SQLite db
instance * Mention the location of the ".sqlite.db" file that you
used in the previous chapter * We want the absolute path of the file, for better
clarity, hence, the use of path.resolve * The location inside path.resolve, is the location of the
sqlite.db file relative to this one */
const sqlite3 = require('sqlite3') const path = require('path') const db = new
sqlite3.Database(path.resolve('./.sqlite.db')) /** * The "serialize" method of the db instance makes sure
that all...
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