Author Archives: Christian Pellegrin

Kubeplay: A Kubernetes cluster in a VirtualBox

Posted on 2021-04-11 by Christian Pellegrin

Kubeplay You can find everything you need to deploy your Kubernetes cluster in a VirtualBox in the kubeplay repository. Current pinned version of the components are: Base system: Ubuntu LTS Focal 20.04 Kubernetes: 1.20.5 CRI-O: 1.20 Cilium: 1.9.5 The Vagrant … Continue reading →

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Using spidev with mainline Linux kernel on the Raspberry Pi 4

Posted on 2021-02-21 by Christian Pellegrin

A couple of weeks ago I finally moved my Arch Linux Arm based Raspberries to the mainline Linux kernel (linux-aarch64) and u-boot. The transition was pretty smooth with one exception: the spidev driver, which is needed to show rainbows (and … Continue reading →

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Reverse Engineering fun for just 9.33 € + shipping

Posted on 2021-01-29 by Christian Pellegrin

This article is a brief introduction to the reverse engineering of a Bluetooth LE Temperature and Humidity sensor and data logger. This is done, according to the EU reverse engineering law, only for interoperability purposes. The device is called SensorBlue … Continue reading →

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Notes on using a TPM2 module on Linux

Posted on 2020-05-20 by Christian Pellegrin

Here I collected some notes on using the TPM2 on Linux, specifically Arch Linux. The motherboard used is an ASRock E3C222D4U with the ASRock TPM2 module. This article focuses on enabling the usage of the keys stored in the TPM2 … Continue reading →

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YAACA, Yet Another AstroCam Application

Posted on 2017-01-08 by Christian Pellegrin

Yaaca is an application to acquire images from ZWO ASICams and apply various astronomical image processing to them. It is available and documented on yaaca github page. Here are some examples.

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Using Google Nik Collection with GIMP under Linux and WINE.

Posted on 2016-04-03 by Christian Pellegrin

Ideally we should have Free Software that serves our needs, but sometimes we must settle for a temporary solution. Google Nik Collection is now free as in free beer, some of its filters are just amazing and it is pretty … Continue reading →

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Blue Light Meter

Posted on 2016-02-13 by Christian Pellegrin

Blue Light Meter is a remote light meter for photography that can be used, via Bluetooth LE, from an Android/Linux phone. Maybe some day in the future a lightmeter GATT profile could be developed and camera may use it. Miniaturized … Continue reading →

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Per process routing take 2: using cgroups, iptables and policy routing

Posted on 2014-08-06 by Christian Pellegrin

In a previous article we saw how it’s possible to do per process routing using namespaces. In this one we will achieve the same by using cgroups, iptables and policy routing. Perhaps the user case is a bit marginal (see … Continue reading →

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Using Linux Network Namespaces for per processes routing

Posted on 2013-11-15 by Christian Pellegrin

The use case for this article may seem a bit strange in year 2013 but I swear it’s real. I have a (relatively) fast connection but I have a traffic cap on it and a (really) slow one which is … Continue reading →

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Android on OpenRD, part 1

Posted on 2012-01-24 by Christian Pellegrin

This is the first article about porting Android 4.0.x AKA Ice Cream Sandwich AKA ICS on the OpenRD Client. This is a pretty powerful ARM machine (1.2 Ghz  256 KB L2 cache, 512 MB RAM and Gigabit Ethernet) with a … Continue reading →

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ftdispi, a library for interfacing SPI devices with FTDI based USB to JTAG dongles

Posted on 2011-12-29 by Christian Pellegrin

ftdispi is a small library that can be used to interface SPI devices to FTDI based USB to JTAG interfaces. It is based on libus-1.0. It was tested with the Xverve Signalyzer (USB VID 0x0403, PID 0xbca0). Have a look … Continue reading →

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Hardware JPEG2000 on Linux

Posted on 2009-12-19 by Christian Pellegrin

Eurotech CTR1474 Linux driver. This is a powerful PC/104 board for DVR applications. It features an JPEG2000 codec and TWA2835 video processor.

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