pedro/projects
Everything I've built that's worth showing: from communication protocols between ESP8266 modules at CEFET-MG to today's homelab.
Student research at CEFET-MG: communication between ESP8266 modules comparing MQTT and CoAP, with robot soccer and robot swarms in mind.
Stack: NodeMCU · ESP8266 · Wi-Fi · MQTT · CoAP
ESP8266 with a soil moisture sensor publishing over MQTT, and a React Native app that shows soil moisture in real time and opens or closes the irrigation valve.
Stack: ESP8266 NodeMCU · Soil moisture sensor · MQTT (PubSubClient) · HiveMQ · React Native 0.62
Open source npm library that turns text into interactive 2D Canvas particles: about 4 KB, zero dependencies, for plain JavaScript, React, or as <text-bubbles>.
Stack: TypeScript · Canvas 2D · Web Components · React · tsup
A visual image-processing environment: a pipeline of blocks (PGM, convolution, histogram) with the algorithms implemented from scratch.
Stack: React 19 · React Flow · Zustand · Vite · Bun
Student assistant: a Telegram bot with AI and OCR, Canvas integration, on-campus location via Wi-Fi, and a REST API in Java with Spring Boot.
Stack: Java 21 · Spring Boot · JWT · PostgreSQL · Docker
A Ryzen 7 5700G with Ubuntu Server and about 22 Docker Compose containers: smart home with Mosquitto and Home Assistant, media, networking, and dev tools.
Stack: Ubuntu Server 26.04 · Docker Compose · WireGuard · Caddy · Pi-hole
Three Quicksort versions in C++17 tested on five datasets of 1,000 to 500,000 elements: hybrids up to 54% faster, theoretical worst case confirmed in practice.
Stack: C++17 · Make · Docker · Python (matplotlib, pandas) · LaTeX (ABNT)
Corporate travel request system: Laravel API with JWT and tests, Vue.js front end, and a Docker environment.
Laravel API with JWT authentication and automated tests, a Vue.js interface, and the entire environment in Docker, for creating and tracking corporate travel requests.
Stack: Laravel · JWT · Vue.js · Docker
A web-based virtual lab built in Scratch that simulates chemical reactions for Chemistry technical program classes, without the risks of toxic materials.
I was part of the DVRQ team at META, CEFET-MG's project exhibition. The virtual lab simulates chemical reactions so that students in the Chemistry technical program can test combinations of compounds without handling toxic or flammable materials. CEFET-MG's Technological Innovation Office ("Coordenação de Inovação Tecnológica", CIT) selected the project for software registration.
Stack: Scratch
Headquarters, three branch offices, and a home office with VLSM, VLANs, NAT, ACLs, IPSec VPN, and OSPF, documented in a LaTeX paper.
A project for the Computer Networks course at PUC Minas: a network with headquarters, three branch offices, and a home office, using VLSM, VLANs, NAT, ACLs, IPSec VPN, and OSPF. The work became a LaTeX paper and also produced a set of tools to decode and encode .pkt files.
Stack: Cisco Packet Tracer · OSPF · IPSec VPN · LaTeX
PDF-to-XML converter with a Python API and a web interface.
PDF-to-XML converter with a Python API and a web interface.
Stack: Python
A movie portal built first in plain HTML, CSS, and JavaScript, then migrated to React with MUI as a hands-on study of React and stack migration, without AI.
A study project on React and on migrating systems: the portal started out in plain HTML, CSS, and JavaScript and was later migrated to React with MUI.
It was a hands-on learning project built without AI, back when there were no agents or LLMs suited to this kind of work yet.
Stack: JavaScript · React · MUI
A mobile phone insurance claims portal built in minutes at an AI workshop, later the project I used to learn OpenSpec and a documented software lifecycle.
A mobile phone insurance claims portal with guided photo capture, built in React with Vite and published on GitHub Pages.
The result came together in a few minutes during an AI workshop. The next step was the most important one: using the same project to learn OpenSpec and drive development the right way, with specified and documented changes and a healthy software lifecycle.
Stack: React · Vite · GitHub Pages
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