• Installing Self-Signed certificate to iOS 13 / macOS 10.15

    This is a followup of previous post about Generating Self-Signed certificate compatible with iOS 13 / macOS 10.15. However, just using such a certificate on your server and connecting to the server is not enough. Disclaimer: I don’t take any responsibility for potential damage or harm caused by following information...


  • Generating Self-Signed certificate for iOS 13 / macOS 10.15

    iOS 13 / macOS 10.15 introduced new requirements for self-signed certificates, which might cause your old self-signed certificates (or new ones without proper configuration) to just stop working after updating devices. The new requirements are documented at Requirements for trusted certificates in iOS 13 and macOS 10.15. Most of the requirements are clear...


  • Sonoff Mini with firmware 3.6: Flashing to Tasmota

    I guess you know the magic of Sonoff Mini and want to flash it to Tasmota (or any other alternative firmware like ESPHome should work - however, not tested!). You have seen articles, tutorials and will follow them. I was mostly following How-to on Reddit (Part 1, Part 2, Part 3). I recommend...


  • Pretty HTML with Jekyll

    Jekyll is a great way to build static website. But it is not easy to produce a nice HTML code with it. This blog is built with Jekyll. I like to work with, but one thing which bothered me is the HTML code it generated. It is not pretty at all. Indentation is all wrong, many empty lines...


  • Tip: iOS devs, reclaim your SSD space back!

    If you have been developing for iOS on your Mac for a while, chances are you can free up some of your precious SSD space with no pain. How much available space can you get back? Up to tens of GBs, depending mainly on how long you have been developing for iOS… What is taking all that space on my SSD? There are many advanced apps to give...