
Alrik Hohenberg
Industrie PCB Design dem Sie vertrauen koennen
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Work experience
Smart Environmental Monitoring & Control System ESP32 + Custom PCB
Aetherlink Innovations GmbH • Freelance
Oct 2024 - Present • 1 yr 7 mos
Designed and built a fully functional IoT-based environmental monitoring system using ESP32 and a custom designed PCB to monitor temperature, humidity, air quality, and control external devices remotely. What I Built: Designed a custom PCB schematic and layout using KiCad / Altium Integrated ESP32 microcontroller for Wi-Fi + Bluetooth connectivity Implemented sensor modules DHT22, MQ-135, light sensor Designed regulated power supply section 5V → 3.3V conversion Added relay control circuit for switching external AC/DC loads Created over-the-air (OTA) firmware update capability Built a web dashboard for real-time monitoring Technical Responsibilities: PCB schematic design and component selection Multi-layer board layout with proper grounding and EMI considerations Firmware development in C/C++ using ESP-IDF / Arduino framework Serial debugging and signal testing using multimeter & oscillososcope Wi-Fi communication using MQTT protocol Data logging and cloud integration Tools & Technologies ESP32 KiCad / Altium Designer C / C++ MQTT I2C / SPI / UART communication Git version control Results Successfully reduced power consumption by 30% through firmware optimization Achieved stable 24/7 sensor monitoring Deployed working prototype with fully assembled PCB Designed enclosure-ready compact board