Home voltage analysis

I log the AC mains voltage at my house starting July 2013, you may recall my post where I was concerned about the unusually high voltage readings at home. Now that I have few months of data collected, it is time to do some analysis. I have 405835 measurements in total since then, taken every…

Clapping to control RF power sockets

I did a fun experiment this evening, clap controlling RF power sockets using Funky v2‘s radio module and a sound sensor breakout module. The latter is pretty cheap one, respectively low quality and performance:   It has couple outputs: analog and digital one. The digital output goes HIGH upon audio signal from the microphone reaching…

Raw infrared <> serial

When interfacing my gadgets to the physical world, I often need to deal with IR of all sorts: air conditioners, TV, audio equipment, media center and so forth. These are all of different brand, so naturally the IR protocol that the remote controls have is different. Some of the more popular ones can be decoded…

Installing emoncms’s “events” module

I use emoncms to log telemetry readings from various sources (wireless sensor nodes, software bots etc), the so logged data helps my IoT connected gadgets make decisions, based on pre-defined rules. For example, my heat pump monitors outside weather conditions (temperature, humidity, wind, time of day, day of week) and adjusts its operation accordingly. Adding notifications…

Flood alarm

My father had a leaking pipe accident last year, and it happened while he was away from his place for a week. The water was flowing for few days before he returned and that caused damage for thousands of Euro, not to speak about the inconvenience. To minimize the damage of such possible future events,…

Tweeting coffee machine using Raspbery Pi

Here is a small project for social network connected home appliance, done for the sake of fun, but provides a good learning experience. I will be connecting my coffee machine to Twitter since I am one of the 6 people without a Facebook registration left on the planet. Connecting to Facebook is equally easy, just…