Tutorials, tips, tricks and knowledge around the Internet of Things and Embedded Systems. The goal of this blog is to explain not only how to implement a solution in code. I also explain important details about the wireless protocols or technologies. Choose your desired topic and get started!

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Latest Posts

  • Proxmox Storage Basics

    This post should give beginners a rough overview over the storage concepts in a usual Proxmox installation. It will not go in depth on all possibilities and caveats. Storage By default, Proxmox uses LVM for its storage system. LVM is the Logical Volume Manager, which adds an additional logical abstraction layer between the hardware (theContinue reading “Proxmox Storage Basics”

  • Raspberry Pi 4 – Blinking patterns of green ACT LED

    On a Raspberry Pi 4, the green “ACT” LED indicates boot errors using certain blinking patterns. The following table shows what the different patterns mean (source of the table is the official documentation). Hint: In case your LED does not flash, or turns completely of after some flickering, your EEPROM bootloader might be corrupt. InContinue reading “Raspberry Pi 4 – Blinking patterns of green ACT LED”

  • DIY Temperature Logger

    DIY Temperature Logger with DS18B20 and ESPHome / HomeAssistant

    I needed a simple way to measure and log the temperature of the heating pipes in our house. The DS18B20 is a well-known and commonly used temperature sensor, and I already have Home Assistant running. So in this post, I want to guide you through the build of a temperature data logger that can easilyContinue reading “DIY Temperature Logger with DS18B20 and ESPHome / HomeAssistant”

  • Setting up Home Assistant with two MQTT brokers (using MQTT bridge)

    Home Assistant only supports subscribing to one MQTT broker. This is a problem, if you get sensor data from multiple different brokers and want to display them in your dashboards. So in this post, I will show you a solution on how to configure one of the brokers as an MQTT bridge. By doing this,Continue reading “Setting up Home Assistant with two MQTT brokers (using MQTT bridge)”

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