Welcome to my blog 🦋

Highlighted projects

  • bmpc – Minimalist Music Player Deamon client in browser
  • web2pdf – Print any web page as PDF document, even JavaScript generated ones
  • pass-group – Group password manager extension for the standard unix password manager
  • galene-stream – Experiment to stream live feeds to Galène videoconference server
  • kraby – Open source 3d-printable hexapod robot with OpenAI Gym environment
  • screenger – Experiment to abuse coil whine to make some screens play music

On my free time I also contribute to other open source projects and volunteer at Crans, Aurore and RezoSup organizations.

Recover OwnCloud calendars

How to recover calendars from a OwnCloud database dump. I had to recover someone’s calendars from an OwnCloud SQL dump. I will detail the steps I went through in this post. Export CalDav calendar from SQL dump To explore a large SQL file, here my_database_dump.sql, it is easier to import it as a new database rather than exploring the text file. Here I am using PostgreSQL but it should also work with MySQL or MariaDB. 1 2 sudo -u postgres createdb owncloud_backup sudo -u postgres psql owncloud_backup < my_database_dump....

Create a WiFiMap using Grafana and Prometheus

This article details how to display Unifi access points metrics on a Grafana Worldmap. I have been working on deploying and setting up a new monitoring stack for Crans network organisation. We switched from Munin and Icinga2 to Prometheus paired with Grafana dashboards. Using Prometheus SNMP1 exporter, this new monitoring stack can collect metrics from all of our Unifi WiFi access point. This article describes a minimal setup that display Unifi metrics onto a Grafana Worldmap panel. What components will be used Unifi Controller: the official controller to provision and monitor Unifi access points, Prometheus: time-series database, Prometheus SNMP exporter: a Prometheus exporter collecting metrics from SNMP, Grafana: a tool to create dashboards to analyse Prometheus metrics....

Flappy Bird clone in VHDL

On the design of BlobbyFish, a Flappy Bird clone in VHDL. Blobbyfish was implemented for a VHDL academic course project in 8 hours. It is based on Flappy Bird but a little bit simplified for the purpose. This is a team project made with Otthorn. It was a great project to start coding in VHDL and explore all main concepts. Please note that this was implemented for the Digilent Basys 2 using Xilinx ISE. All the code is available there under the GPLv3 license: https://github....

Ubuntu 18.04 on Dell G3 3779

Let's analyse and replicate Dell OEM modifications made to Ubuntu on Dell G3 3779. This guide assumes you have a freshly-installed Ubuntu 18.04 installed on your Dell G3. Following the following steps will recreate the configuration that Dell ships on Ubuntu-preinstalled G3 laptops. WARNING: THESE STEPS ARE PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND. If you lose your data, brick your device, any other damage or anything else happens (e.g. your cat eats your dog), it is YOUR PROBLEM and YOUR RESPONSIBILITY. You have to make sure to get a recovery disk before making these changes....

Common board pinout references

A list of simplified board pinout schematics found online. Pinouts from BQ Boards Arduino UNO, source Arduino Mega, source Arduino Micro, source Arduino Leonardo, source Arduino MiniPro, source Arduino Nano, source BQ Zum, source AtTiny, source Peripherals Document describing multiple setups for peripherals on Arduino (source): Full document (without microcontrollers) LCD screen (Hitachi 44780 compatible), source RS232 connector, source SD Card, source