A battery powered MIG Welder

Into my toolbox, I have all electrical tools with a single battery model. Except a welding station...
Let's see how I built one.

GPS for the fields : a POC with GMaps

Moderns tractors have built-in GPS with very high precision, and indeed self driving. But why do farmers need a GPS ? How To use it ? Let's build one based on Google Maps, runing on an Iphone to prevent slugs invasion.
I spent only 4 hours on this prototype.

Bad practices on APIs, registration and development platform : examples with John Deere platform

From bad API answers (403/404), incremental IDs, Sandbox on production data and registration : real examples of bad patterns with the John Deere platform.

Share a part of your screen

During visios with Teams, Jitsi or Meet you can not share only a part of your screen. Let's hack something !

Password Generator : a single key to generate all passwords

Generate your passwords with math and a pure function.

Password Card : a safe idea for password management

Manage your passwords without any software, just a unique card you designed.

Share your clipboard content with your mobile with a QRCode

Sharing an URL, a key, a piece of text you have on your computer to your mobile or tablet is easy if you are in an ecosystem. Try it with a Mac and an Android phone... A little piece of software that only shows the content of your clipboard in a QRCode.

How I created asked.live a dating app in 4 days

I wanted to learn how to develop mobile apps. So, I created asked.live, a dating app, in 4 days.

PassMedia : faux fournisseur d'identité, vrai tracker

PassMedia, mais qu'est-ce que c'est ? Un fournisseur d'identité unique pour tous vos contenu presse que vous consultez sur le net ? Vous apporter du contenu supplémentaire (et bienveillant) ? Ou alors un super tracker ?

Document generator for Gitlab : from Markdown to PDF

At please-open.it, we write many documentations about Keycloak and authentication in general. Those documents are considered as resources for the company, and all our resources are stored in our gitlab instance.

We built a tool based on Markdown and Gitlab-ci to generate great and beautiful PDF documents with home page, changelog, table of content, header and footer.

From dev to CEO - Part 1 : Desk, tools, working environment

Starting a company is like starting a new job.

I will expose how I organized my every day work, starting with my working environment : screens, laptop, desk...

A feedback about 2 years of remote working, starting a new business and many optimizations.

How to correctly logout a user

Import batch of data from excel

There is others solutions than export to CSV and re-import with a custom script.
For a personnal project, I made a simple reusable function for a Microsoft Excel in order to import sets of data using a CRUD API.

Sharing data without user consent : bad idea

client_id and client_secret are authentication informations, from an application to another app. By this study, with a real use case between Strava and SportHeroes, I'll show you the real importance of those informations.
Why sharing data collected from another provider is a real problem for user experience and legal reasons ?

SSH second factor by notification

Allows a second factor authentication on SSH server using notifications in progressive web app.

OpenVPN and Keycloak : Link your VPN Infrastructure with your SSO

OpenVPN allows usage of PAM modules. By using an oauth2 client PAM module and password grant, we can use our own SSO (Keycloak) to authenticate users on a VPN infrastructure. For Oauth2 providers which do not allow Password Grant, we will use a "token authentication" by providing a valid token instead of a password. Code and demo with Google as authentication provider.

"CodeLess" backend using postgres, postgrest and oauth2 authentication with keycloak

Most of the time, a backend is just a layer between APIs and a database. Using the Postgrest project and some SQL we will build a backend without any Java, Golang, C# etc… For this Demo, we will build a chat application with channels, messages, users and user profiles.

Please-open.it token leak extension

This is a chrome extension that checks oauth2/openid connect authentication process on any website. Just install it, log in and check for alerts and recommandations.

Web analytics are the worst auth enemy

Why you should be very very carefull with webanalytics on your apps. How to deal with analytics solutions when you have authentication, oauth2, openid connect or just any kind of Single Sign On.

Mais... pourquoi vous mettez des barres de compétences sur le CV ?

Mais que se passe-t'il depuis quelques années ? Sur tous les CV que l'on peut voir passer sur les réseaux sociaux et dans les boites mail, c'est de plus en plus le concours à celui qui videra la cartouche d'encre lors de l'impression mais aussi les ignobles barres de chargement.

Webauthn in Keycloak (natively)

Webauthn is now supported natively in keycloak since version 8.0.0, let's see how to do it

Use client authentication with keycloak

Most of the time, there is no authentication between services in a micro-services context. A controler must authenticate the user by his token, retreive needed informations and stops token propagation. Authentication between services is a must have. A service must know who is calling him. To do it, we need client authentication.

Open an SSH connection with oAuth2

2 failles de sécurité avec fuite de données chez pôle emploi

L'utilisation du protocole d'authentification "implicit flow" déconseillé par l'Internet Engineering Task Force (IETF) expose les utilisateurs à un vol de leurs données personnelles et éventuellement de leur session sur le site de pôle emploi. Par effet de bord, les données personnelles des candidats (Nom, Prénom, Adresse email, identifiant) sont transmises à des sociétés tierces privées

The simpliest oauth2 server in 120 lines : Google Spreadsheet and App Script

Oauth2 works like magic ?
Explore how it works and make your own server with Google Spreadsheet and App Script.

Use WebAuthn authentication in keycloak

Upset with passwords ?
How to set up a webauthn registration and authentication with keycloak, and remove definitively password authentication.

"Startup" n'est pas une excuse

Vous en avez assez d'entendre à tout bout de champ "non mais c'est ça les startups !" pour justifier tout et n'importe quoi ? Clarifions un peu les choses autour de tout ce brouhaha de startups et autres "jeunes pousses".

Selfmade IOT timeseries platform with LibreOffice

Is it really necessary to deploy big platforms with lot of custom code and pay for only a few devices pushing data ? This project is about a mini IOT platform directly in Libreoffice Calc (spreadsheet) consuming data from a MQTT topic, without writing any code.

How to exchange token from an external provider to a keycloak token

This post deals about how to authenticate a user from an external provider by a "token-exchange" operation. Example with keycloak and Cordova mobile app.

Why you should (or must) use «Sign in with... » button

How Microsoft fucked up my work tool.

During two years, I ignored warnings and articles from users that explains how Microsoft delete their data or broke drivers configuration during update. During two years, I had a great working tool with my laptop under Windows 10. Last Friday, it went bad...

Make your own selfie box with a raspberry PI.

How to build your own selfie box with a very simple script and VLC. It needs only a push button, a Raspberry PI and a USB camera.

Unlock a door using your Google account and a QRCode

Generate a QRCode on your smartphone with your Google account and use it to unlock a door.

Track your daily tasks using Google Assistant, IFTTT and Spreadsheet

Working alone at home needs some particular tools. Everyday I have to track spending time on each task I do. Here is my self made tool.

My smartphone as a shortcut helper - enhanced version and sources

Build your own access control with Please-open.it

Control your garage door or motorized gate with please-open.it and your Google account. Build your own and start using please-open.it free.

Init a raspberry pi on boot without anything !

Build a sort of "cloud init" for raspberry pi initialisation without any SSH connection, keyboard or screen.

Let's encrypt and 2 (or more) servers

Recently, I wanted to build a cluster behind the same domain and I had some difficulties with let's encrypt certificates renew. Here is my solution.

Make Thingz : discover Thingz kit

A giant 360 leds clock

How I built a giant led clock. It has management API and also can be a great light.

Un développeur n'est pas un joueur de baby foot

Non, je ne suis pas un joueur de babyfoot. Je suis devops et mon métier c'est de développer et d'automatiser des opérations logicielles ou opérationnelles sur des plateformes cloud.

Electric bike throttle command

Two years ago I bought an electric bike. It has a sensor in, this means that I have to pedal for the engine to move me. This system is called "pedelec". Let see how it works and how we can hack it.

Make a touchable taskbar

Gmail auto labels

Every day, I receive to much emails. Even if there is only one email, it is to much. Many times it is notifications (purchase on Amazon, Azure notification, notifications and notifications...).
This is my solution for automatic labels on my incoming mails.

A dashboard viewer with remote control

As a DevOps, I love dashboards for Jenkins, my Azure platform status or some custom figures about running softwares. In an openspace, it is usrfull to have big screens showing those dashboards. Let's build a solution with a raspberry pi and a small custom software to control it.

A 10 leds box driven by REST API

This is a simple box with a 10 leds strip on it, driven by REST calls over HTTP, with a simple Raspberry Pi Zero W

My smartphone as a shortcut helper

On some softwares you can have more than 500 shortcuts. The use of a large number of shortcuts leading inevitably to their complexification and makes them hard to remember for users especially for casual users.
What if your smartphone can directly drive your computer software through these shortcuts ?

A special key on foot

As a developer, I often use special characters such as [ and ], #, |, ` or \. All those specials characters are written with the "ALT GR" key (named "AltCar") on my keyboard. For a # you need both your two hands because the "3" key is far away from "AltGR". The idea is to control this key using my right feet.

Build your own Android Auto head up display

This is how I built my own Android auto head-up display. It took me 1 year to do all stuff, but only 1 month for Android auto integration.

Use Google Spreadsheet as a timeseries storage (IOT initiation)

This project was created for 3 trainees (13 years old) hired for a one week initiation. The goal was to explain my work by the simplest way. The main condition...

Slides DevFest Toulouse : My Resume in an operating system

Les slides de ma présentation faite au DevFest 2016 de Toulouse sont désormais disponibles : Slides PDF...

Website on a raspberry pi ? Yes, it's possible

Last month, my article my resume as an operating system made a buzz during one week. Thanks for your interest ! By the way, this buzz has forced me rethink my...

My resume in an Operating system

This is one of the most useless idea I've ever had -- making an operating system that only shows my resume. 8 years ago, when I was a student, I...

Control your plugs with bluetooth and bash scripts

Here in France, most of time electricity is cheaper on night. Everyday you have to think about power consumption for heater, dishwasher or washing machine. Repeative tasks, so checking solution...

Use Google Calendar as a task manager

A geek solution is not always compliant with... a non-geek girlfriend. Repeatitive tasks, duration, notifications, multi-users... Google Calendar fits perfectly with this kind of usages. What i want is to...