Category Archives: Data

Arduino – logging accelerometer

Posted on 16.02.14 by Morten

This logging accelerometer is set up using Arduino UNO compatible microcontroller SD card adapter Three axis digital accelerometer Various cables, breadboard and an sd-card (any size will do) The library for using the SD-card comes with the arduino IDE v … Continue reading →

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Simple ajax based autocomplete in jquery

Posted on 30.01.14 by Morten

Starting to abandon prototype.js to use what seems to be the new standard jquery – one of the first things I want to do, is to make some autocomplete fields fetching values from a data base. I have made an … Continue reading →

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Automatic datavalidation in postgres

Posted on 05.05.13 by Morten

How to stop bad data from propagating – automatically check what goes into a postgres database Continue reading →

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How to move a VboxManager virtual machine to another host

Posted on 20.04.13 by Morten

Officially, to move a vbox virtual machine to another host, you have to clone it. But – what if vboxmanager for some reason has stopped working on the host you want to move the vms from? Continue reading →

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Sensor testing

Posted on 14.04.13 by Morten

Comparing measurements of temperature and humidity using DHT11, DHT22, BMP085 and DS18B20. Continue reading →

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Arduino and BMP085

Posted on 31.03.13 by Morten

The BMP085 is a barometric and temperature sensor. I’ve got one on a breakout board from geeetech. Using this and an arduino, it is possible to build an electronic barometer. It can be connected to an arduino uno or nano: … Continue reading →

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Reading temperature data out of postgres

Posted on 18.03.13 by Morten

I have set up a system logging temperatures (and later hopefully also other parameters) to a postgres database. The data are now read out and presented as an svg-graph. (this may not work in some older browsers, i.e. msie< 9 … Continue reading →

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Storing temperature data in postgresql

Posted on 05.03.13 by Morten

Pushing temperaturedata from an arduino setup into a postgresql database Continue reading →

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Arduino and infrared reflective sensor

Posted on 09.02.13 by Morten

Testing a infrared reflective sensor module. I set it up with an arduino board, running the following sketch: int sensorPin = 10; int value = 0; int prevval =0; int count=0; void setup() { pinMode(sensorPin,INPUT); Serial.begin(9600); } void loop() { … Continue reading →

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Store data from temperature server in couchdb

Posted on 04.02.13 by Morten

Fetching json data from an arduino server, adding a time stamp and stashing it all into a couchdb. Continue reading →

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