Information Technology

ESP32-cam

The ESP32 is a low-cost and low-power microcontroller developed by Espressif. This project describes how to flash the Tasmota32 webcam server (beta) firmware onto the ESP32-cam module with onboard Wi-Fi. The Tasmota32 firmware can be used as an alternative to the Espressif CamWebServer Arduino sketch for users looking for more options to monitor and control an ESP32-cam remotely or to integrate into an existing home automation server via HTTP requests or MQTT.

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RPi button box

The project describes how to repurpose external HDD enclosures into button boxes for the Raspberry Pi and similar single board computers. It includes the development of a button box controller, wiring schematics, how-tos, and list of hardware and software components.

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Mesh networking

Mesh networks using free and open-source software (FOSS) and common hardware. The project is based on OpenWrt and uses the layer-2 implementation of the Better Approach to Mobile Adhoc Networking (B.A.T.M.A.N.), called batman-adv, to route packets over multiple mesh topologies.

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NanoPi M4 mini-NAS

A cheap, low-power, low-profile NAS solution based on FriendlyArm’s NanoPi M4 SBC. It has a SATA hat that is connected to the board via PCI-e, allowing up to four HDDs to be connected to the NAS via standard SATA III interface.

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A chácara microserver

The microserver is composed of an HP Proliant Microserver Gen8 running Openmediavault and a Dell Optiplex 3060 micro running Proxmox. Both machines are used mostly for security-related things (surveillance cameras, location tracking) and Plex and Plex-related programs (PMS, Tautulli, Sonarr, Radarr, etc.). Other uses have to do with a universal desktop folder (Syncthing) and data analysis (R server).

pfSense white-box

A cheap, customizable pfSense box based on the ASRock J3355b-itx mobo. It features an Intel dual-core processor capable of running IPS/IDS software, multiple VPNs, and more. A passively cooled, low-power, and low-profile firewall that fits the demands of most home users.

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Programming

Button box controller

Core program for a Raspberry Pi button box controller that uses the gpiozero Python library.

Github Repo

Youtube4tvh

Youtube4tvh is a Python CLI program for TVHeadend servers that uses either the Youtube API or a custom-built web content parser to find live-streams and create (or update) m3u playlists. The m3u file follows IPTV conventions that allow a TVH server to automatically create an IPTV network with them, and each stream is piped into TVH via a Streamlink shell script.

Github Repo

NetMonitor LCD

Python script for a 16x2 LCD that uses ping and netcat to monitor the network status of hosts and services, respectively.

Github Repo

PWM fan controller

A fan controller written in bash for the 12v fan connector of the NanoPi M4 SATA hat. By default, the script uses a bounded logistic model with a moving mid-point (based on the distance between the average temperature over time and a critical temperature threshold) to set the fan speed dynamically.

Github Repo

Audio diagnostic tool

This is a CLI diagnostic tool for audio files written in GNU Bash that extends my previous bash-flac-diag tool to mp3 and other audio formats. In brief, it tests a single or multiple audio files and generates logs with good files (no errors found) and bad ones (at least one error found). Tests are performed by codec-specific tools. There are two post-processing modes for bad files: fix or delete.

Github Repo

Logistic function in Bash

An implementation of the logistic function written in GNU bash and GNU basic calculator (bc).

Github Repo

Multi-trial data count

A VBA macro for MS Excel that counts patterns of correct responses (C) and errors (E) across multiple trials (e.g., CCC, CCE, CEC, …, EEE). It was initially developed as a tool to help with the data analysis of multi-trial memory experiments in which subjects provide boolean-type responses (yes/no, correct/error) for multiple items across multiple tests. In such designs, each item generates a pattern of C-E responses across tests. This VBA macro counts all such patterns across subjects and items.

Github Repo

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Academic (latest)

Multinomial modeling

Distribution of educational materials to researchers and students about the use of multinomial modeling in psychological research.

Paper (pt-br)

Bivariate recollection

A psychological theory that assumes that memory probes can provoke conscious awareness of either target items (target recollection) or their context (context recollection) or both.

Paper (en)

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