All Posts

PredictionDB – Two Days, Fifty PRs Later

Three years of weather history in about two hours, a model that got tripped up by the clock change, and a pile of side tunnels – the first follow-up from the PredictionDB burrow.

Par14a-Database – 754 Price Sheets, One SQLite File

What does my grid operator really charge a heat pump or wallbox under §14a EnWG? I dug through the price sheets of all 754 German distribution grid operators and turned them into one queryable database.

PredictionDB – Digging for Next Week's Power Price in Free Weather Data

Tomorrow's prices are free at 13:00 anyway – a half-built stack that forecasts German load and power prices for the whole coming week, so a battery can plan further than tonight.

Hoermoles BlueObscure – My Garage Door in a Browser Tab

The sequel to the reverse-engineering dig – porting the Hörmann BlueSecur protocol to Web Bluetooth and shipping an installable, offline, no-app-store PWA that opens my burrow from a browser tab.

Hoermoles BlueObscure – Digging a Second Tunnel Into My Own Garage

How I reverse-engineered the Hörmann BlueSecur BLE protocol out of a .NET MAUI app and ended up opening my garage door from a laptop terminal.

One USB-C Charger to Power Them All – The HW-398 PD Trigger Board

A tiny solder-pad board that tricks any USB-C PD charger into outputting 9 V, 12 V, 15 V or 20 V – perfect for ridding your burrow of the barrel-jack jungle.

Ditch the Desktop App – Browser Label Printing for the Brother PT-E560BT

A driver-free, backend-free SPA that prints to a Brother PT-E560BT over USB or Bluetooth Classic using the Web Serial API – because installing P-touch Editor in the burrow is a hard no.

Publishing a Static Blog on GitHub Pages with Nuxt

How to turn a Nuxt content site into a fully automated, free static blog – from repository setup through custom domain to zero-click deployments.

devc – Open a VS Code Dev Container Directly from the Shell

A tiny bash script that saves you from clicking through VS Code every time you want to open a project in a Dev Container – just type devc and go.

Teaching the AI Mole – GitHub Copilot Skills for Nuxt Blogs

How I taught GitHub Copilot everything it needs to know about managing a Nuxt-based GitHub Pages blog – using Copilot Skills.

The Great Flood - How I Turned My Living Room into a High-Tech Sump Pit

Fresh Air for Mole Holes – Dyson Floor Nozzle Revived

Getting Rid of Nasty Underground Neighbours - IoT Mouse Trap

Crying on Open Waters - A Piece of HW for AhoyDTU and Reading the Hoymiles Inverters

Intensive Underground Metering - An RJ45 Breakout for Connecting Your Meters Through Ethernet Cabling

Doing the Undone - Decoding SML or Hacking the Tibber Raw Data

Code Red on Fire - Or Heat-Metering with Node-Red

Taming The Cephodian Octopus - Reef

Smart Home Controlled Joy-IT Lab Power Supply

MBus application layer

Reading a meter speaking MBus

In The Heat Of The Night - 1-Wire Temperature Sensor Directly Immersed

Mole's Underground Heating System Can Not Be Over-Engineered 😋 (work in progress)

Some Thoughs On The M-Bus

The Remote Serial Debugging Nightmare

Pushing the Rectangle Through the Round - Develop With RIOT OS on Windows - Doing The Impossible

Get The Hell Out Of My Wall-Box... or How To Make Cheap Type-2 Adapter Cables Not So Sticky...

How To Open Your Zipper - Use Fuse To Browse Archives

Just Do It - How To Create Your Own Home Assistant Add-On - Part 1

EEX, EPEX SPOT And The Real Net-(In)transparency

Get Your Personal Oil Well Level - Integrating OilFox Into Home Assistant using node-red

Ultrasound Distance Module Overview

Reverse Engineering the Buderus KM271 - And Making It WiFi-Flying on ESPhome and Home Assistant

Limiting EV Charge SOC with go-echarger and Home Assistant - Update

How to limit charging to a predefined SOC with go-echarger and Home Assistant if your car does not support this feature.

wmBus Meters And How To Get It Into Home Assistant

The Magic Of Absolute Humidity

Taking Your M-Bus To The Next Level... MQTT

Kathrein EXIP 418 - Getting It Back To Work on Ubiquity Networks

Think Sustainable, TH!NK City (reanimated) - Work in Progress

Ever heard about the TH!NK City electric car? No? Before I got asked to help bringing it to life again, I also didn't. In fact, if you do not count the first cars at all, which have been electrical, too, it was one of the first electric cars, at least in the 21st century, that entered serial production somehow. Now these cars are mostly dead, because the battery died when not used for some time...

How to Wire an EV Wall-Box (the economic perspective)

Angular Web App on ESP32

ESP32-EVB, PlatformIO And ESP-IDF – Yet Another ESP32 tutorial

Sorting Your Digital Mess - How to Easily Set-Up a Private Search Engine

Just Another Hobby - 3D Printing

STM32 USB-DFU

STM32 FreeRTOS and printf

ESP32-EVB, PlatformIO And Arduino - Yet Another ESP32 tutorial

Doxygen - Tips and Tricks

FreeRTOS debugging on STM32 - CPU usage

Penmount PCI Touch Controllers And I2C - Lost In Space

STM32CubeMX and SDRAM

Installing BigBlueButton on Your Dedicated Server

How To Debug Hardware-Faults on Your Dedicated Server

School's out - How to Tame Your Children

Integrating wmBus devices into iobroker

STM32 BLDC Motor Control

Merging the Contents of Two InfluxDBs

Headless Rescue System over SSH

STM32 UART Continuous Receive with Interrupt

How to build a Smart Home

OrangePi 4G-IoT Complete Pack

How to Build A Private Storage Cluster (with Ceph)

Compile Ceph (master) on ARM (32-Bit)

Compiling Software on RAM-limited Multi-Core Systems

OrangePi 4G-IoT Android 8.1 SDK

OrangePi 2G-IOT Android 4.4 SDK

Google ChromeCast's (Smartphone) Independance Day

Atlassian And New SSL Certificates

Windows (was) just a pain

Creating Custom Issue Types for JIRA

Custom issue types are one of Jira's most powerful features. Learn how to create and configure them for requirements, impediments, and other use cases that usually require a separate tool.

Getting Started Embedded – Part II – The Embedded Project

Getting Started Embedded - Part I - The Toolchain

Just digged up