Embedded Systems Engineering
Full-cycle embedded systems development – from microcontrollers and firmware to IoT gateways and real-time data processing.
Overview
With decades of experience in electronics and embedded systems, I design and implement complete embedded solutions for industrial, agricultural, and commercial applications. My expertise spans the entire stack:
- Hardware selection – choosing the right microcontroller for the job.
- Firmware development – reliable, efficient, and maintainable code.
- Connectivity – LoRa, Wi-Fi, Bluetooth, and wired protocols.
- Integration – connecting embedded devices to cloud platforms and dashboards.
Core Capabilities
1. 🧩 Microcontroller Platforms
I work with a wide range of microcontrollers, selecting the best fit for each project’s power, performance, and cost requirements:
| Platform | Applications | Key Strengths |
|---|---|---|
| ESP32 | IoT sensors, gateways, Wi-Fi/Bluetooth devices | Dual-core, built-in Wi-Fi/BLE, low cost |
| ESP8266 | Simple IoT sensors, Wi-Fi actuators | Ultra-low cost, small footprint |
| STM32 | Industrial controls, precision timing | High performance, extensive peripherals |
| Arduino | Prototyping, education, quick proofs-of-concept | Ease of use, vast ecosystem |
| Raspberry Pi | Edge computing, gateways, AI at the edge | Full Linux, powerful CPU, camera/GPIO |
2. 📡 Wireless Protocols & Connectivity
I design robust wireless communication for industrial and outdoor environments:
- LoRa / LoRaWAN – Long-range, low-power IoT networks.
- Wi-Fi (802.11) – High-bandwidth local networks.
- MQTT – Lightweight publish/subscribe messaging for IoT.
- I2C – Master/slave communication between sensors and controllers.
- SPI / UART – High-speed serial communication.
- Bluetooth LE – Low-power local device connectivity.
3. 💾 Firmware Development
I write production-grade firmware that runs reliably 24/7:
- C / C++ – Primary language for microcontrollers.
- MicroPython – Rapid prototyping and scripting.
- FreeRTOS – Real-time operating systems for complex tasks.
- OTA Updates – Over-the-air firmware updates for deployed devices.
- Power management – Deep sleep modes for battery-powered devices.
4. 🏭 Industrial Integration
Embedded systems don’t live in isolation – I integrate them with the broader infrastructure:
- Industrial protocols – Modbus, CAN bus, PROFIBUS.
- Edge computing – Processing data locally before sending to the cloud.
- Gateway design – Aggregating data from multiple field devices.
- SCADA integration – Connecting to industrial control systems.
Example Projects
📡 LoRa Monitoring Network
A complete environmental monitoring system deployed across a 10km² agricultural site:
- Devices: 50+ ESP32-based sensor nodes with LoRa transceivers.
- Sensors: Temperature, humidity, soil moisture, rainfall.
- Gateway: LoRa concentrator + MQTT broker.
- Backend: Data stored in PostgreSQL, visualized in Grafana.
- Impact: Reduced water usage by 30% through real-time soil monitoring.
Tech: ESP32 · LoRa · MQTT · PostgreSQL · Grafana
🏭 Industrial Controller with STM32
A custom industrial controller for a manufacturing line:
- MCU: STM32F4 series.
- Features: 16 digital inputs, 12 relay outputs, 4 analog inputs.
- Communication: CAN bus for equipment control, UART for local display.
- Firmware: Bare-metal C with interrupt-driven architecture.
- Uptime: 99.95% over 3 years.
Tech: STM32 · CAN bus · C · RTOS
🌐 Raspberry Pi Edge Gateway
A multi-protocol edge gateway for industrial IoT:
- Hardware: Raspberry Pi 4 with 8GB RAM.
- Connectivity: LoRa concentrator, Wi-Fi, Ethernet, 4G LTE.
- Software: Node.js for data routing, MQTT broker, local SQLite cache.
- Cloud integration: Publishes data to AWS IoT Core.
- Resilience: Stores data locally during internet outages, syncs later.
Tech: Raspberry Pi · Node.js · MQTT · LoRa · AWS IoT · SQLite
✉️ Morse Code – High-Level Sport Master
Beyond professional engineering, I hold the prestigious High-Level Sport Master qualification in Morse Code. This unique skill reflects:
- Exceptional hearing and pattern recognition.
- Discipline and precision.
- Understanding of RF communications at a fundamental level.
This expertise directly informs my work in RF engineering and antenna design.
Key Achievements
- 50+ embedded devices deployed in production environments.
- 12 LoRa gateways installed across 5 countries.
- 3 industrial control systems designed and deployed.
- 100% OTA update success rate on deployed devices.
- 30% reduction in water usage through precision agriculture monitoring.
- 99.95% uptime on industrial controller over 3 years.
Technology Stack
Microcontrollers & SoCs
- ESP32, ESP8266
- STM32 (F0, F1, F4 series)
- Arduino (Uno, Nano, Mega)
- Raspberry Pi (3B+, 4B)
- ATmega, ATtiny
Protocols & Buses
- LoRa / LoRaWAN
- Wi-Fi (802.11 b/g/n)
- MQTT, HTTP, WebSockets
- I2C (Master/Slave)
- SPI, UART, CAN bus, Modbus
Languages & Tools
- C / C++
- MicroPython
- Node.js (for gateways)
- PlatformIO, Arduino IDE, STM32CubeIDE
- FreeRTOS, Zephyr (basic)
Integration
- Docker (for gateway containers)
- PostgreSQL, SQLite
- Grafana, Prometheus (monitoring)
- MQTT brokers (Mosquitto, VerneMQ)
Related Projects
p1_scalable_iot_systems.md
- Scalable IoT Systems – Complete IoT platform.
- Industrial Infrastructure Platform – Backend and DevOps.
Hardware & Testing Setup
My development lab includes:
| Equipment | Purpose |
|---|---|
| Oscilloscope | Debugging signals and timing. |
| Logic analyzer | Protocol analysis (I2C, SPI, UART). |
| Spectrum analyzer | RF signal quality and interference. |
| Variable power supply | Testing under different voltage conditions. |
| Environmental chamber | Testing temperature extremes (-40°C to +85°C). |
| LoRa test kit | Range testing and antenna tuning. |
This equipment allows me to deliver field-tested, reliable solutions.
For a detailed technical discussion or embedded systems consultation, feel free to reach out.