Category Archives: Electronics

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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Raspberry Pi Touch Display Application

I have written a Java Swing touch screen application for my new Raspberry Pi Touch Display. It lets me control most of the devices in my house, and shows environmental data for the rooms in my house: It also displays information, … Continue reading

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You’ve got mail

My house now lets me know when I have mail delivered through my letter box. This is mainly electronic components from China. It tells me “You’ve got mail” in a Stephen Hawking voice. It takes a few Raspberry Pi servers … Continue reading

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What protocol for the Internet of Things?

My home automation system supports several more protocols and types of sensor since I last blogged about it: Wemo insight plugs ESP8266  MQTT-based Wifi sensors EnOcean energy harvesting sensors Raspberry Pi OneWire sensors Raspberry Pi GrovePi sensors Fitbit BLE sensors … Continue reading

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ESP8266 MQTT Relay

Another development board for the ESP8266 that I have tried is the Olimex ESP8266 EVB, which I bought from ebay. This has a relay, a button for flashing, a UEXT socket which includes the serial lines used for flashing and … Continue reading

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ESP8266 Barometric pressure sensor

I have been experimenting with the ESP8266 for creating Wifi sensors. The nodemcu firmware makes programming it very easy. I have tried a few different development boards, and the nodemcu devkit seems the nicest for creating sensors. I bought it … Continue reading

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My new RepRap Ormerod printer

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