• Making stuff: CO2 monitor
    If you have read my blog and my postings on Facebook for a while you know that one of my hobbies is to play around with microcontrollers. I built environmental sensors for my house and also two solar powered weather stations for outside. One of my inhouse sensors is already monitoring fine dust levels and also “air quality” (what the BME680 sensor reports, to be honest, I have no real clue what it actually monitors). With the current discussions about increasing air quality for the purpose of lowering infection risk by monitoring inhouse CO2 levels, I decided to test one […]
  • Environmental Sensors: Remote
    Last week my garden sensors gave up – the wooden birds house I used to contain them was simply rotten so I needed a new one. For outside housing of sensors these cheap wooden birds houses are great – no plastic but wood, cheap, and easy to work with. The local home supply store only had expensive ones, so I ordered the cheapest one I could find on Amazon. Important feature is a “door” for easy access to the inside, and it must be possible to mount a solar panel. Goal of the project was to have a small weather […]
  • Environmental Sensors: Lightning
    You perhaps know that one of my hobbies is playing around with microcontrollers and sensors. For quite a while now I have deployed ESP8266 based sensor nodes inside and outside of my house. Currently they mainly gather temperature, moisture levels, air pressure and light levels, using BME280 and similar sensors. A while ago I discovered the AS3935 lightning sensor. It uses a hardware-based algorithm to detect radio bursts caused by lightnings. Since last weekend now I have integrated one of these sensor in one of my outside sensor nodes (see picture). My first indoor tests went quite well, although the […]
  • Remote RIPE80 is history
    The last week RIPE80 meeting happened. Online. It should have been in Berlin, with my company DE-CIX as the „local host“. Because of that, I was appointed to the program committee – as a local host representative. For my friends not familiar with what I do, how the Internet industry works or, what a RIPE meeting is let me elaborate a bit. So what is RIPE – or Réseaux IP Européens? It is a community of people working in the internet industry. We are not a legal entity, there is no formal membership, everything we do is on a voluntary […]
  • Stuff I do when working from home: Rebuilding the network
    As a lot of people, I am currently working from home. That means: I start about one hour earlier in the morning I have a looong lunch break I finish at the same time as in office I do not have to commute – that saves me 90 minutes each day! So, time to spend on some private projects. The first project I started (and completed) was to rebuild my home network. Being a network engineer, my network at home is a bit bigger and more complex than a usual domestic network: I have separate guest network I have (and […]

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