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Fast jeder Tag im Kalorien-Kalender war gelb oder rot, weil die Farbskala noch auf festen Schwellen von 700 und 300 kcal stand. Beim Umbau musste ich erst rausf…

23 GPX tracks, a physics model and a route planner that first suggested a loop without a single new kilometre. What came out of doing the maths on my evening ri…

My employer gives me a 50-euro Media Markt voucher as a PDF every month. Nice perk, but when you order online and want to redeem several vouchers, it gets annoy…

After getting so cozy with the Zigbee thermostats and temperature sensors, I've now grabbed four Zigbee plugs to test. Sonoff S60ZBTPF, which have a power meter…

I bought myself an Anthbot Genie 600 robot mower and wanted to know what it was up to. After a few hours of nmap, tcpdump and Python scripting I had access to t…

I have 6 Zigbee devices for heating control: 4 Sonoff thermostats (TRVs) and 2 temperature sensors. But only 3 of them showed up in InfluxDB. Telegraf was runni…

While cleaning up my Grafana dashboards I noticed that my Viessmann Vitoladens 300-C cycles way too often: 17-52 burner starts per day, averaging just 9 minutes…

My Grafana dashboard was one single giant page with everything crammed in: server stats, Fritzbox, heating, power, PV - all in collapsed rows. It was annoying t…

After the Flightradar ADS-B setup one thing was clear: RTL-SDR is a blast and I want to receive more. Air band, ACARS, NOAA weather satellites, marine VHF, ISM…

I'm currently heating my 1980s old building into the ground and I have no idea whether the heating curve is right. The Viessmann runs on slope 1.2 / level 3.0 a…

I wanted to know what's flying around up there, so I first applied for a free Flightradar24 receiver kit. They rejected me. So I dug out an old RTL-SDR dongle,…