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Tag: electronics

Duplicate unprotected Mifare Classic NFC Card

Duplicate unprotected Mifare Classic NFC Card

Where I live, they have changed the way they pickup garbage. Only plastic, paper, and green-stuff will be picked up (in separate bins). And the ordinary (formerly grey) trash you need to bring to one of the central bins in the neighborhood (and glass you have to bring to the bins at the shopping mall). So, those central “grey” bins… to prevent just anyone from dropping stuff in there, you need to use an RFID badge to open it up….

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Sonoff Firmware Update – Lava-lamp Switch

Sonoff Firmware Update – Lava-lamp Switch

I have a lava-lamp, which should not be on for more than 5 or 6 hours at a time. So I decided to move it from switching on/off manually to something a bit more automated. For this I reprogrammed a Sonoff WiFi switch (based on the ESP8266). Now it can be controlled via voice commands (via Alexa / Amazon’s Echo Dot), and via some simple CURL (Wifi) command line call’s. The curl’s are put in a cron (timer) process on…

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Wifi Controlled Alert Light

Wifi Controlled Alert Light

Intro Now why would I want to create an alert light? 😉 The use case I had in mind was work related; in our team we do monitor a bunch of kubernetes/docker server clusters, a set of software build tools/services, and an oauth secured open-api-gateway. To keep an eye on this during office hours, we have some big dashboard monitors in the room, showing nice graphs and red/green alert boxes. However, sometimes when you are working on something, it takes…

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