Dany's notes

Sign in Subscribe

Latest — 10 Feb 2026

U4GO: Open USB 4G

At first glance, those inexpensive 4G/LTE USB “WiFi modem sticks” you find on marketplaces like AliExpress or Amazon look like simple mobile hotspots—plug them in, insert a SIM card, and get online. But behind their plastic shells lies something far more interesting: many of these devices are actually

More issues

Building a Reliable Offline Backup System with udev and systemd

Every one who have a homelab and/or self-host NAS know that the 3‑2‑1 rule is a best‑practice backup strategy, widely used for such systems to protect data against hardware failure, human error, ransomware, and disasters: 3 copies of your data in at least 2 different types

PTerm now supports Pharo 9 and Pharo 10

PTerm, the (only) terminal emulator for Pharo has been initially developed and maintained on Pharo 7. Due to some major API changes, PTerm was not compatible with higher version of Pharo such as 9 and 10. Porting it to Pharo 9 and 10 was long time in my to do

Web based VNC client with AntOS docker image

Long time ago i developed WVNC, a simple protocol based on Web socket that allows to connect to VNC server from browser. WVNC consist of * A server side plugin (for Antd web server) that (1) acts as a bridge between VNC server and the web server; (2) defines the base

CI & automation: Multi-architecture build of software with Jenkins and Docker

Multi-arch software building and distribution is a complex and time-consuming maintenance task in which maintainer/developer need to compile somehow their software for all supported architectures, often, on a single machine. Automation solution such as Jenkins allows to automatize this task and facilitating continuous integration and continuous delivery. Multi-arch software

Monitoring and collecting syslog messages from Unix Domain Socket

Application log is the traditional way to monitor an application/service. On *nix-based system, Syslog is a common but powerful tool for centrally monitoring applications logs. The primary use of syslog is for system management as capturing log data is critical for sysadmin, devOp team, or system analysts, etc. This

AntOS v1.2.0-beta release

After a long testing period, AntOS v1.2.0-beta is now released!!! Change logs * Improvement GUI API * [x] File dialog should remember last opened folder * [x] Add dynamic key-value dialog that work on any object * [x] Window list panel should show window title in tooltip when mouse hovering on an

Data visualization: global view of blog posts relationship

As stated on a post where i talked about using tf-idf to detect similarity between two blog posts, my blog is just a bunch of posts sorted by date, no category, no fancy features like user interest tracking, post ranking, etc. I usually work on many different domains (robotic, IoT,

sysmond: Simple service for (embedded) Linux system monitoring

Working on my DIY robot software (Jarvis) in headless mode, i came across a situation where i needed to monitor the system resource such as CPU, battery, memory, network and temperature to measure the "greedy" of my robotic application. Furthermore, as the robot was battery powered, battery safety

Jarvis Arduino firmware

This post is the follow up post of the previous JETTY: Jarvis Serial to ROS-2 Transport Layer post. The arduino firmware on the one hand implements the JETTY protocol for communicating with ROS and on the other hand takes care of all low-level hardware communication including: * Reading of battery voltage