SRH Berlin University of Applied Sciences

Designed, built, and unified a multi-node Smart Home automation ecosystem powered by Raspberry Pi 4. Integrated four distinct mechatronic subsystems to handle automated actuation, analog-to-digital signal processing, inter-process communication, and real-time telemetry analytics.

Subsystem Breakdown:

1. Climate Actuation: Interfaced a DHT11 sensor via GPIO to automate dynamic cooling simulation based on live temperature thresholds.

2. Presence-Based Lighting: Utilized an HC-SR501 PIR motion sensor to control multi-LED room lighting with zero-latency MQTT event triggers.

3. Automated Barrier System: Built a proximity-triggered parking gate using an ultrasonic sensor (HC-SR04) and PWM-driven micro-servo motor, incorporating voltage-level shifting for safe 3.3V logic operating thresholds.

4. Automated Water Management: Converted analog water probe telemetry using a PCF8591 ADC over I²C to automatically manage a high-load pump via relay control.

Data Infrastructure:

Engineered a centralized monitoring pipeline processing sensor payloads via MQTT (Mosquitto) into an InfluxDB time-series database, rendered on a centralized Grafana dashboard.