Tags / Sensors

Energenie Integration with Python on a Raspberry Pi

Using pyenergenie to do Energenie automation with out need for the cloud

It is disappointing what IoT hardware manufacturers provide regarding software with their products. I don’t want to single out Energenie - at least they created a tremendous hackable radio board specifically for the Raspberry Pi. The ENER314-RT provides two-way communication with all Energenie products including all their power switches, energy monitors and radiator valves. This means that you don’t need to buy an Energenie Gateway MIHO001, and you also don’t need cloud connectivity and the worry that somebody might be snooping on your data. [Read More]

Radar Speed Camera Rebooted

building a radar speed gun with a Raspberry Pi

Background This post is a follow-up from my previous post Building Radar Speed Camera and Traffic Logger with more information, improved design and experience from using the device in the field for nearly 2 years. This project is a self contained speed radar that can be used to give realtime traffic speeds, log traffic flows and statistics over a period of time and also possibly capture speeds of other objects in sporting environments, for example, though I haven’t specifically tested and tuned the code for this. [Read More]

Build a Spectrometer

using a Raspberry Pi for less than $50

This project promises to give you super-human powers. I still find it amazing that our eyes construct all the colours for the most part1 from the mix of red, green and blue that the cones in our eyes can detect. Despite this simple three valued approach to colour that pervades our eyes, cameras, monitors and computer graphics there is a deeper reality to colour in everyday life. This projects opens the door on that reality. [Read More]

Introducing Polestar

I’m not really sure why it’s taken so long but I’d like to introduce Polestar. I actually first started the project back in 2014. I got a couple of early adopters in January 2015. Since then it’s been used quietly without much fuss with a few updates along the way. Background I got the idea for Polestar at the 2014 Good Things conference in Bath, UK. I noticed a repeating pattern from the speakers - a kind of reference Internet of Things architecture. [Read More]

Building Radar Speed Camera and Traffic Logger

with a Raspberry Pi

There is a major update to this article, please see this later post Radar Speed Camera Rebooted. I’ve always been interested in connecting things up to computers that they were never designed for. I could reminisce about my first drawing capture arm that used captured the two joint angles with potentiometers and used them to control the pulse width oscillators that fed into the cassette input on a ZX Spectrum. [Read More]