Redis in-memory storage


© Lead Image © redspruce,

© Lead Image © redspruce,

Article from Issue 219/2019

Include binary data and image files in your IoT projects with Redis, an open source, in-memory data structure store.

For many Internet of Things (IoT) projects, a message-queuing system like MQTT (message-queuing telemetry transport) is all you need to connect sensors, devices, and graphic interfaces. However, if you have requirements for high throughput or you are storing special data types (e.g., binary data or image files), you should take a look at Redis.

Redis (Remote directory server) [1] is an open source, in-memory data structure store that can be used as a database, cache, and message broker. It supports a wide range of data structures, such as strings, hashes, lists, sets, bitmaps, HyperLogLogs, and geospatial indexes. Redis servers can be loaded locally, or they are available as web-hosted solutions. Redis libraries are available for a wide variety of programming languages.

In this article, I show you how to set up a Redis system with two examples. The first is a flame scanner that connects an Arduino module to a Node-RED web dashboard. The second example is a Raspberry Pi weather station, in which a webcam image is stored in a Redis server and a PHP web page shows the data.


Use Express-Checkout link below to read the full article (PDF).

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy Linux Magazine

Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

  • Logstash

    When something goes wrong on a system, the logfile is the first place to look for troubleshooting clues. Logstash, a log server with built-in analysis tools, consolidates logs from many servers and even makes the data searchable.

  • News

    IBM acquires Red Hat, Fedora 29 and Ubuntu 18.10 released, Redis Labs modules forked, Microsoft offers its patent portfolio.

  • Node-RED on Android

    We show you how to control devices connected to Rasp Pi GPIO pins with text messages from an Android phone.

  • RaspPi-Controlled Toy Sailboat

    With Node-RED, you can create a web dashboard that instructs a Raspberry Pi to set the rudder position on a toy sailboat.

  • FAQ

    Big data is like The Matrix – Better without the sequel

comments powered by Disqus

Direct Download

Read full article as PDF:

Price $2.95