The Sensor433 library and Geeetech transmitters and receivers

As I use 433MHz transmitters for sending sensor data from many of my IoT-nodes, I have made a re-usable Arduino library for this purpose. The transmitted sensor data is picked up by one single receiver (an ESP8266 board) that converts the values to MQTT messages on my local network. In this post I will describe this library, my setup and also a set of new 433MHz transmitters and receivers that I have upgraded to.

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Setting up a Raspberry Pi as a Minecraft server

My kids are occasional Minecraft addicts. As I want to support their creative activities, I have setup a Minecraft server at home so they can collaborate with friends on their construction endeavours. The system we use is a Raspberry Pi 3 with a Spigot Minecraft server. A few weeks ago I had an SD-card corruption so I had to start from scratch with a new Raspbian OS install and setup the Minecraft server once again. This time I have decided to write down the installation- and configuration steps if someone else needs them.

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