Blogartikel, Anleitungen und Tipps rund um den Raspberry Pi Singleboard Computer und verwandte Themen.
We will post information about the Raspberry Pi SBC and related topics, like Arduino, Making, Embedded Development, etc.
Beamer Recherche
Beamer RechercheTechnologienLCDJe Farbe ein LCD Panel, werden zusammen projiziert (Licht wird durch die LCD Paneele hindurchprojiziert)zweitbeste KontrastwerteGut für Helligkeit.Nachteile:· Fliegengitter-Effekt ("screen door effect")· staubempfindlich· LCD-Memory-Effekt (Einbrennen)DLPnutzt kleine Spiegel auf einem Chip, um Licht an / aus zu modulieren.Meiste Modelle haben ein Farbrad um sequentiell Farbe aufzubauen. Einige High-End Modelle haben drei DLP chips (einen für [...]
Vorteile von Android™ vs. Linux
Technische GrundlagenAndroid™ basiert auf dem Linux-Kernel, optimiert ihn aber besonders auf embedded Systeme & mobile Plattformen.Android nutzt den Linux Kernel mit einigen Anpassungen. Es unterscheidet sich jedoch grundlegend von üblichen Linux Distributionen, wie bspw. Debian / Raspbian / Alpine Linux.Üblicherweise nutzen Distributionen die GNU C Bibliothek (glibc), und einen X server (bspw. Xorg) für grafische [...]
Q&A LetsTrust TPM
This is a series of questions and answers for our LetsTrust TPM module. If you have an industrial project, and are looking at 100+ units, we’re happy to work with you to modify the product, if necessary. Contact us for details.Is there the possibility to support the TPM module on the Linux Kernel 3.1? Which [...]
WLAN password Anonymebox 3B+
Usually the WLAN password for the Anonymebox 3B+ is set to a random password during manufacturing. It is shipped to you with a silver label, carrying the WLAN password on it which is set.If you order the image, or upgrade from an earlier Anonymebox firmware, there is a default password which is set.The default WLAN [...]
Alpine 3.9.0 initramfs init changes
Alpine 3.9.0 ships a new version of the init script in it’s initramfs.left: Alpine 3.9.0, right: Alpine 3.8.2There are a number of interesting changes:better and earlier networking support for the boot process, with an additional kernel parameter for cmdline.txt: BOOTIF, allowing you to specify the device interface you want to use for boot purposesnetworking is [...]
Using nuitka compiler for python3 on Alpine Linux ARMHF (musl)
Motivationpidoctor is written in Python (as there was no easy way to get Crystal to work on ARMHF / musl). This means a dependency on Python – which adds overhead. I suspect that this overhead is the reason that pidoctor will not run on 256 MB Raspberry Pi’s – because the RAM is exhausted by [...]
Debugging the Alpine boot process
As discussed in my previous post, Alpine Linux goes through several stages when it boots. Just after mounting the boot media, and scanning it for apkovl’s (with nlplug-findfs), there is an option for you to get a console, by setting $SINGLEMODE to yes. Setting SINGLEMODE to yes is easy, you simply add the word “single” [...]
Setting up envoy as a front proxy on Docker with communication to other Docker containers
I have already existing containers which I want to use envoy as a proxy & https manager in front of. I am learning to use envoy, and am sharing some of my learnings here, as documentation is a bit confusing to start with.My already existing container is called “taxgod” – it runs a Crystal application [...]
Alpine boot process on the Raspberry Pi
Today we will have a look at the Alpine Linux boot process on a Raspberry Pi in some detail.The picture shows the contents of a "virgin" SD card with the Alpine image, which has not been booted yet.This picture shows the contents of the boot folder.Initial boot Stages on the Raspberry Pi Refer to this [...]
PiDoctor, a free online tool to check Raspberry Pi computers
PiDoctor is a free online tool to check Raspberry Pi computers and display the information in an clear way to users. PiDoctor is part of picockpit.com, a growing collection of tools to support Raspberry Pi single board computer users.Leipzig, January 10, 2019 - pi3g e.K., an approved Reseller of Raspberry Pi computers for Germany, Switzerland [...]