Modbus Server on Raspberry Pi as Babelfish for UVR16x2

Our main data logger is the Control and Monitoring Interface of the freely programmable controller UVR16x2. There are two pieces of hardware you need for logging – the actual control unit and the logger connected to the controller via the CAN bus. This ‘architecture’ might be due to historical reasons, but I like the separation…

A Color Box. Lost in Translation

It was that time again. The Chief Engineer had rebuilt the technical room from scratch. Each piece of heavy equipment had a new place, each pipe and wire was reborn in a new incarnation (German stories here.) The control system was turned upset down as well, and thus the Data Kraken was looking at its…

Where Are the Files? [Winsol – UVR16x2]

Recently somebody has asked me where the log files are stored. This question is more interesting then it seems. We are using the freely programmable controller UVR16x2 (and its predecessor) UVR1611) … .. and their Control and Monitoring Interface – CMI: The CMI is a data logger and runs a web server. It logs data…

Logging Fun with UVR16x2: Photovoltaic Generator – Modbus – CAN Bus

The Data Kraken wants to grow new tentacles. I am playing with the CMI – Control and Monitoring Interface – the logger / ‘ethernet gateway’ connected to our control units (UVR1611, UVR16x2) via CAN bus. The CMI has become a little Data Kraken itself: Inputs and outputs can be created for CAN bus and Modbus,…

Simulating Life-Forms (2): Cooling Energy

I found an incredibly detailed research report by the Australian government – about energy use in private homes, by appliance and purpose. It confirms my reluctance to ‘predict’ cooling energy as usage of air conditioning depends strongly on life-style choices.

Data for the Heat Pump System: Heating Season 2016-2017

I update the documentation of measurement data [PDF] about twice a year. This post is to provide a quick overview for the past season. The PDF also contains the technical configuration and sizing data. Based on typical questions from an ‘international audience’ I add a summary here plus some ‘cultural’ context: Building: The house is…

Heat Transport: What I Wrote So Far.

Don’t worry, The Subversive Elkement will publish the usual silly summer posting soon! Now am just tying up loose ends. In the next months I will keep writing about heat transport: Detailed simulations versus maverick’s rules of thumb, numerical solutions versus insights from the few things you can solve analytically, and applications to our heat…

Earth, Air, Water, and Ice.

In my attempts at Ice Storage Heat Source popularization I have been facing one big challenge: How can you – succinctly, using pictures – answer questions like: How much energy does the collector harvest? or What’s the contribution of ground? or Why do you need a collector if the monthly performance factor just drops a…

My Data Kraken – a Shapeshifter

I wonder if Data Kraken is only used by German speakers who translate our hackneyed Datenkrake – is it a word like eigenvector? Anyway, I need this animal metaphor, despite this post is not about facebook or Google. It’s about my personal Data Kraken – which is a true shapeshifter like all octopuses are. (Because…

Give the ‘Thing’ a Subnet of Its Own!

To my surprise, the most clicked post ever on this blog is this: Network Sniffing for Everyone: Getting to Know Your Things (As in Internet of Things) … a step-by-step guide to sniff the network traffic of your ‘things’ contacting their mothership, plus a brief introduction to networking. I wanted to show how you can…

Hacking My Heat Pump – Part 2: Logging Energy Values

In the last post, I showed how to use Raspberry Pi as CAN bus logger – using a test bus connected to control unit UVR1611. Now I have connected it to my heat pump’s bus. Credits for software and instructions: juerg5524.ch messpunkt.org SK Pang Special thanks to SK Pang Electronics who provided me with CAN…

Hacking My Heat Pump – Part 1: CAN Bus Testing with UVR1611

In the old times, measuring data manually sometimes meant braving the elements: Now, nearly all measurements are automated: In order to calculate the seasonal performance factor of the heat pump system we have still used the ‘official’ energy reading provided by the heat pump’s display. Can’t this be automated, too? Our Stiebel-Eltron WPF7 basic is…

Everything as a Service

Three years ago I found a research paper that proposed a combination of distributed computing and heating as a service: A cloud provider company like Google or Amazon would install computers in users’ homes – as black-boxes providing heat to the users and computing power to their cloud. In the meantime I have encountered announcements…

Alien Energy

I am sure it protects us not only from lightning but also from alien attacks and EMP guns … So I wrote about our lightning protection, installed together with our photovoltaic generator. Now our PV generator is operational for 11 months and we have encountered one alien attack, albeit by beneficial aliens. The Sunny Baseline…

Half a Year of Solar Power and Smart Metering

Our PV generator and new metering setup is now operational for half a year; this is my next wall of figures. For the first time I am combining data from all our loggers (PV inverter, smart meter for consumption, and heat pump system’s monitoring), and I give a summary on our scrutinizing the building’s electrical…

The Impact of Ambient Temperature on the Output Power of Solar Panels

I have noticed the impact of traversing clouds on solar power output: Immediately after a cloud has passed, power surges to a record value. This can be attributed to the focusing effect of the surrounding clouds and/or cooling of the panels. Comparing data for cloudless days in May and June, I noticed a degradation of…

Solar Power: Some Data for the First Month.

On May 4, 2015, we started up our photovoltaic generator. Here are some numbers and plots for the first month – and what I plan to do next. Our generator has a rated power of 4,77 kWp (kilowatt peak), one module has 265 Wp. The generator would deliver 4,77 kW of electrical power under so-called…

Watching TV Is Dangerous

I am not talking about humans. But TV-sets might threaten other devices in the smart home; this was a recent puzzle submitted by a blog reader. Two unrelated devices / services met on the user’s local computer network: IP-TV provided by a large German telco. a data logger for monitoring the heating system. This user…

Data Logging with UVR1611 – FAQ

I have received several questions related to my article on data logging on this blog, or to my postings on monitoring and control on our German blog. Thus I have decided to write the article I would have wanted to read when I once made myself familiar with this. The target audience for this article are…

Google and Heating Systems (2)

I googled our company name. Then I found this: Auftrag means order and the obfuscated parts contain our full company name, the Chief Engineer’s name, the URL of a vendor we ordered material from recently, invoice total, and a comment like The client said we should… The now inaccessible URL had pointed to a comma-separated…

Cyber Security Satire?

I am a science fiction fan. In particular, I am a fan of movies featuring Those Lonesome Nerds who are capable of controlling this planet’s critical infrastructure – from their gloomy basements. But is it science fiction? In the year Die Hard 4.0 has been released a classified video – showing an electrical generator dying…

My Google Searches Might Heat Your Home

Sorry, but this is not about Search Term Poetry! Rather the contrary: Imagine your search terms could be utilized for something down-to-earth, for something useful. Google states: See more comparisons for Google services here! (Though I am disappointed they did not convert to bath tubs!) If Google’s computers run in their data centers in the…