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Malte Hellmeier

Malte Hellmeier

Dortmund, Germany •
27 posts •
Opel / Peugeot Electric Vehicle: Set Charging Threshold Limit (to 80%)
Jan 2023 / Raspberry Pi

Opel / Peugeot Electric Vehicle: Set Charging Threshold Limit (to 80%)

A Python script is presented on how to set the charging threshold or limit for PSA battery-powered EVs (e.g., to 80%) to stop at a desired level.

  • Malte Hellmeier
    Malte Hellmeier
4 min read
Fix Bluetooth Problems on Raspberry Pi running Raspberry Pi OS (Raspbian)
Nov 2022 / Raspberry Pi

Fix Bluetooth Problems on Raspberry Pi running Raspberry Pi OS (Raspbian)

Shows fixes for Raspberry Pi OS Bluetooth problems like device not found, no default controller available, or running Bluetooth in docker.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Transfer Files Between Two FTP Servers (Move Website)
Sep 2022 / DevOps

Transfer Files Between Two FTP Servers (Move Website)

This article describes how to transfer files and folders from one webhosting FTP server to another provider, e.g. for moving a website.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Device / Printer doesn't Connect to Best Repeater over Mesh
May 2022 / Smart Home

Device / Printer doesn't Connect to Best Repeater over Mesh

Workaround if a device (printer) doesn't connect to the best wireless repeater in a local AVM FRITZ! based WiFi network using Mesh technology.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Ubuntu Boot Loop Problem: Fix Full Disk with 0 Bytes Space Left
Mar 2022 / Linux

Ubuntu Boot Loop Problem: Fix Full Disk with 0 Bytes Space Left

If the Linux system boots in an infinite loop, the root filesystem partition is maybe full with 0 bytes left. I will show tips to free up space.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Transfer Contacts from Google to Apple: Fix Import/Export Problems (Birthday, Address, Picture, etc. missing)
Feb 2022 / Apple

Transfer Contacts from Google to Apple: Fix Import/Export Problems (Birthday, Address, Picture, etc. missing)

There are several problems when importing vCards from Google to Apple Contacts: Birthdays without years, addresses without labels, profile pictures etc.

  • Malte Hellmeier
    Malte Hellmeier
5 min read
Photography Problems: Pink / Purple Lines on Long Exposure Images with ND Filters
Jan 2022 / Photography

Photography Problems: Pink / Purple Lines on Long Exposure Images with ND Filters

I noticed pink / purple lines on the resulting images of my long exposure shots with my DSLR camera on sunny days and ND filters applied.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
[How-to] Microsoft Teams: Add Animated Video Background Image (GIF)
Dec 2021 / Tools

[How-to] Microsoft Teams: Add Animated Video Background Image (GIF)

Microsoft Teams doesn't allow to add an animated video background. This tutorial shows a trick how to change the virtual background into a GIF image.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Fix: macOS Network drops with LAN over USB-C Docking Station in Zoom, Teams, ...
Aug 2021 / macOS

Fix: macOS Network drops with LAN over USB-C Docking Station in Zoom, Teams, ...

If your MacBook with a LAN docking station kicks you out of meetings over Zoom, Microsoft Teams, BigBlueButton,... after a short time, I show how to fix it.

  • Malte Hellmeier
    Malte Hellmeier
3 min read
[How-to] Connect IKEA TRÅDFRI Devices (Lights, Driver, I/O Dimmer, ...) to Philips Hue Bridge
Aug 2021 / Smart Home

[How-to] Connect IKEA TRÅDFRI Devices (Lights, Driver, I/O Dimmer, ...) to Philips Hue Bridge

Since IKEA TRÅDFRI and Philips Hue both use ZigBee, this article shows how to use the I/O Dimmer to control lights and drivers over a Hue Bridge / Gateway.

  • Malte Hellmeier
    Malte Hellmeier
7 min read
Canon Printer: Enable macOS Big Sur Scan Function in System Settings
Jul 2021 / Apple

Canon Printer: Enable macOS Big Sur Scan Function in System Settings

The scan function of my Canon Pixma MX925 multifunction printer isn't available in the Apple macOS Big Sur system settings. I will show you how to enable it.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Field Report: Testing the 28-Hour Day Sleep Schedule for One Week
Apr 2021 / Off-Topic

Field Report: Testing the 28-Hour Day Sleep Schedule for One Week

A field report, experiences, tips and thoughts from living one week in the 28-hours per day sleep cycle. The initial idea is based on a xkcd comic.

  • Malte Hellmeier
    Malte Hellmeier
5 min read
macOS Big Sur: Python 3.7 Installation with Homebrew
Apr 2021 / DevOps

macOS Big Sur: Python 3.7 Installation with Homebrew

A step-by-step tutorial on how to install Python 3.7 on macOS Big Sur with Homebrew and fix all upcoming bugs, errors and problems with popular packages.

  • Malte Hellmeier
    Malte Hellmeier
7 min read
[Quality Test] Spotify vs. TIDAL: Music Streaming Comparison
Feb 2021 / Review

[Quality Test] Spotify vs. TIDAL: Music Streaming Comparison

This article compares the best and highest sound qualities of the music streaming services Spotify and TIDAL in a personal field test over 3 month.

  • Malte Hellmeier
    Malte Hellmeier
5 min read
Self-Host and Dockerize Standard Notes Extensions with Docker-Compose
Dec 2020 / DevOps

Self-Host and Dockerize Standard Notes Extensions with Docker-Compose

In this article we show how to use docker and docker-compose to host Standard Notes extensions on your own infrastructure.

  • Malte Hellmeier
    Malte Hellmeier
4 min read
CSF / LFD Firewall: csf.pignore not working or ignoring processes
Nov 2020 / DevOps

CSF / LFD Firewall: csf.pignore not working or ignoring processes

Sometimes, processes added to the csf.pignore file aren't ignored and alert mails still arrive. This article introduces several solutions and fixes.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Raspberry Pi – Basic Setup on Raspbian (Raspberry Pi OS)
Oct 2020 / Raspberry Pi

Raspberry Pi – Basic Setup on Raspbian (Raspberry Pi OS)

This quick guide describes the important steps to create a fully working Raspbian (Raspberry Pi OS) system (langauge setup, static IP, expand disk etc.).

  • Malte Hellmeier
    Malte Hellmeier
4 min read
[How-to] Migrate ownCloud 10.5.0 to Nextcloud
Sep 2020 / DevOps

[How-to] Migrate ownCloud 10.5.0 to Nextcloud

This step-by-step tutorial explains how to migrate an existing ownCloud instance to Nextcloud by preserving existing shares and federations.

  • Malte Hellmeier
    Malte Hellmeier
5 min read
Nextcloud 19 Server: Allow iframe / embedding from external Domains
Sep 2020 / Tools

Nextcloud 19 Server: Allow iframe / embedding from external Domains

If you host your own Nextcloud 19 server and you try to embed the content from other URLs or domains via an iframe or other HTML elements it doesn't work. The solution for the problem is briefly described in this blog post.

  • Malte Hellmeier
    Malte Hellmeier
2 min read
[How-to] DSLR APS-C Sensor cleaning (Nikon Camera Example)
Aug 2020 / Photography

[How-to] DSLR APS-C Sensor cleaning (Nikon Camera Example)

In this step-by-step tutorial I will show you how to clean your DSLR sensor (Nikon camera example) by yourself with a simple and cheap cleaning kit.

  • Malte Hellmeier
    Malte Hellmeier
3 min read
Jabra Evolve2 85: Test, Review & Hands-on the Bluetooth Headset
Jul 2020 / Review

Jabra Evolve2 85: Test, Review & Hands-on the Bluetooth Headset

A detailed test & review of the new Jabra Evolve2 85 bluetooth over-ear headset / headphones with charging stand and infos about mic, sound and quality.

  • Malte Hellmeier
    Malte Hellmeier
6 min read
Laravel 7: How to override validateCredentials for custom  Login Validation
May 2020 / Coding

Laravel 7: How to override validateCredentials for custom Login Validation

To create a custom login validation by adding checks in Laravel 5, 6 or 7, the validateCredentials method from the EloquentUserProvider must be extended.

  • Malte Hellmeier
    Malte Hellmeier
3 min read
Ghost CMS Editor: Open external Links in a new Tab or Window (change HTML target)
May 2020 / Coding

Ghost CMS Editor: Open external Links in a new Tab or Window (change HTML target)

The Ghost CMS editor doesn't have a possibility to change link settings to open external links in a new tab or window. But there are some workarounds!

  • Malte Hellmeier
    Malte Hellmeier
2 min read
Coronavirus Tip and How To: Remote Party Gaming with your Friends
Apr 2020 / Off-Topic

Coronavirus Tip and How To: Remote Party Gaming with your Friends

How to use video conferencing tools like Jitsi to play the Jackbox Party Pack games remotely with your friends in times of the coronavirus COVID-19.

  • Malte Hellmeier
    Malte Hellmeier
5 min read
Python Tesseract 4.0 OCR: Recognize only Numbers / Digits and exclude all other Characters
Mar 2020 / Coding

Python Tesseract 4.0 OCR: Recognize only Numbers / Digits and exclude all other Characters

The OCR software Tesseract 4.0 doesn't allow you to whitelist a list of characters. I will give 3 solution to extract only numbers out of an image with the Tesseract Python wrapper called "PyTesseract".

  • Malte Hellmeier
    Malte Hellmeier
2 min read
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