Getting Started with Node-RED on Raspberry Pi

This post is an introductory guide to Node-RED. I’ll cover what’s Node-RED, how to install it, how to use the visual interface to create a simple flow.

Prerequisites

Before you start reading this blog post, I’m making an assumption that you are already familiar with the Raspberry Pi and you know how to install the operating system.Read More

I2C Installation for Raspberry Pi

This is a step by step guide on installation I2C driver for the Raspberry Pi. It is for the Raspbian image. Make sure your Raspberry Pi is connected to the internet when installing the drivers.

The new Raspbian distro already have the I2C Driver installed but they are disabled by default. To enable it all you need to do is comment out a line by putting # in front. At the prompt type:
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Steps to Secure Your Raspberry Pi Against Attackers

Raspberry Pi boards are fantastic for any project — they’re cheap, easy to use, can run a wide range of possible operating systems, and provide programmable GPIO pins as well as multi-core CPU availability and multiple USB ports.

You can use Raspberry Pi boards for all kinds of automation and information gathering projects. But, if you are not careful, your little hobby project might result in a security risk that acts as an entry point into your network. They can’t perform secure booting such as ARM Trustzone, and the SD card and operating system are not easily encrypted. Follow these security tips to safeguard your Pi and other devices on your network.Read More

Control a HD44780 LCD display via I2C

LCD character displays are a simple and a cost-effective way to display a text. Thanks to the HD44780 controller, the control of the modules has become very simple. However, one must occupy many GPIOs for it. An alternative is the I2C data bus, which means that only two GPIOs are used.

In this tutorial a 20×04 HD44780 character display is controlled using a I2C display adapter. A logic converter is used to adjusting the voltage level for the module without damaging GPIOs.Read More

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