Category Archives: Electronics

VGA and audio for Pi Zero

I backed the Analog Expander Cap – for Raspberry Pi Zero Kickstarter campaign. It was a lot of soldering, but it works and makes a very small PC that works with a VGA monitor. I have only tried the VGA … Continue reading

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Flotilla

I seem to be one of the first to get the Flotilla¬†mini-kit from Kickstarter. It consists of a hub that is connected to the Raspberry Pi, and then a set of modules can be connected to the hub via micro … Continue reading

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MQTT Topic Hierarchy

Here is my current MQTT topic hierarchy in a real-time updating web page, produced by Ben Hardill‘s MQTT Topic Hierarchy browser. I need to sort a lot of things out. The data is sometimes correctly scaled, and sometimes not. The … Continue reading

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MQTT and Websockets

I have been experimenting with a new web site to control my house as the current one, written in PHP, is very slow as it gets data using TCP connections to HouseControl. I wanted to get as much of the … Continue reading

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Couch Potato

I have had a Jeenode force sensor under my couch for a while. I thought I would use it for some couch potato monitoring. This node-red flow causes my house to say “Hello, couch potato” when anyone sits down on … Continue reading

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emonPi

I have recently been working with the team from OpenEnergyMonitor to include support for LightwaveRF in their new emonPi product – see their blog post. There was a port of my LightWaveRF library¬†called lightwaverf-pi on Github. I forked this and … Continue reading

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Using openHAB as a User interface

I have been experimenting with using openHAB to control my home automation devices. I am mainly using it as a user interface to existing capability. It is very easy to set up, and install, and is very portable. Its default … Continue reading

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