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  • Arpico Energy

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ranaweerasupun/README.md

Hey, I'm Supun 👋

I'm an embedded systems engineer, currently building production systems at Richard Pieris & Company — robots, edge IoT infrastructure, battery management systems, and real-time video streaming platforms. Before this, I spent several years in Russia working across embedded electronics, fire safety systems, HVAC firmware, and nanofabrication research.

My background is a bit unusual. I started in nanotechnologies, moved through semiconductor physics and solar cell research, and ended up deep in firmware and hardware-software co-design. That path gives me a way of thinking about problems — from the electron level up to the cloud — that I find genuinely useful.

I care about the full picture: schematic to PCB to firmware to backend to deployment. And I document the process, not just the outcome.

What I Work With

Embedded & Firmware — C C++ Python STM32 ESP32 Raspberry Pi 4/5 Raspberry Pico Arduino RTOS Embedded Linux Linux Device Drivers I2C SPI UART

Edge & IoT — MQTT (QoS 0/1/2) Offline-first Design SQLite Docker systemd Edge Computing Architectures

Video & Streaming — GStreamer WebRTC V4L2 ALSA PipeWire H.264/H.265 RTSP Low-latency Pipelines

Robotics — ROS2 Jazzy SLAM Toolbox Nav2 Gazebo LIDAR Autonomous Navigation OpenCV TensorFlow Lite

Electronics — PCB Design KiCad EasyEDA Power Electronics Battery Management USB-C PD Schematic Design

Full-Stack & Tools — Node.js React FastAPI PostgreSQL WebSocket Docker Wireshark SolidWorks

Nanoscience — Photolithography PVD MBE Molecular Self-Assembly SCAPS-1d COMSOL Multiphysics ANSYS Lumerical

A Few Things I've Built

WebRTC Telepresence Robot Control Platform — A production bidirectional video and audio streaming system deployed across a robot fleet. Hardware-accelerated H.264 encoding via V4L2, achieving under 100ms latency on Raspberry Pi 5, with serial motor control, PTZ camera control, and multiple WebSocket endpoints.

Production MQTT Edge Client — A resilient edge computing client with offline queuing over SQLite, exponential backoff, QoS 0/1/2 support, dual storage architecture, TLS and authentication, health check daemon and 24-hour soak tested. Built to survive real network failures, not just ideal conditions.

6-Layer UPS Board for Raspberry Pi 5 — A custom 6-layer PCB with intelligent power management, BQ25750 synchronous buck-boost charger for 6S Li-ion/LiPo, dual-source input switching, thermal monitoring, and graceful pre-depletion shutdown. Manufactured via JLCPCB.

Battery Management System — Full-stack BMS with C/C++ firmware, real-time web monitoring, live telemetry graphs, multi-channel voltage/current monitoring via I2C ADC, and cloud backup to PostgreSQL.

controlpad – A cross-platform Python library for integrating game controllers into robotics, drone, and edge computing projects.

Always building. Always curious.

Pinned Loading

  1. controlpad controlpad Public

    A cross-platform Python library for integrating game controllers into robotics, drone, and edge computing projects.

    Python

  2. fleet-analytics fleet-analytics Public

    End-to-end IoT analytics project. Simulates a fleet of 15 edge devices, streams telemetry through MQTT, stores it in InfluxDB, and visualises it in Grafana.

    Python

  3. pi-motion-detection-cam pi-motion-detection-cam Public

    Camera that automatically records when movement occurs

    Python

  4. resilient-edge-mqtt-client resilient-edge-mqtt-client Public

    A robust MQTT client Library that handles network failures, manages storage intelligently, reconnects automatically, and has been thoroughly tested.

    Python

  5. telepresence-bot telepresence-bot Public

    The repository contains prototype stages of a media unit of a teleconferencing robot. Each prototype is better than the previous one.

    JavaScript

  6. tmp102-i2c-driver tmp102-i2c-driver Public

    A production-quality Linux kernel module for the TMP102 temperature sensor — I2C protocol, hwmon integration, and device tree support, built with smart home environmental monitoring in mind.

    C