Engineering Portfolio

Raspberry Pi CM4-based industrial gateway designed for commercial greenhouse and precision agriculture applications. Features MQTT/Modbus RTU protocol bridging, LoRaWAN sensor integration, and automated irrigation logic with fertigation control. Multi-protocol support includes Modbus RTU, UART, RS485, and MQTT for seamless integration with existing SCADA infrastructure. Real-time dashboards provide comprehensive monitoring of environmental conditions, nutrient delivery, and system diagnostics. Equivalent to a mini-PLC/RTU system with cloud connectivity for remote management and predictive maintenance.

Commercial-grade fertigation controller featuring multi-channel EC/pH sensing using ADS1115 ADC with CD4053 analog switching matrix. Implements closed-loop dosing algorithms with PID control for precise nutrient management in large-scale hydroponic operations. Cloud-based rule engine enables remote configuration and monitoring with industrial-grade solenoid and pump control interfaces. Redundant fail-safe logic ensures continuous operation and prevents crop loss. Designed for long-term field deployment with weatherproof enclosures and industrial power supplies. Comparable to commercial fertigation machines from established manufacturers.

Scalable IoT sensor network for large plantation monitoring utilizing ultra-low-power LoRaWAN nodes with HX711-based precision load cell measurement. AS923-compliant long-range communication enables coverage of extensive agricultural areas with minimal gateway infrastructure. Industrial gateway provides SCADA-friendly MQTT topic structure for seamless integration with existing farm management systems. Predictive analytics algorithms process weight trends to optimize irrigation scheduling and reduce water consumption. Battery life exceeds 12 months on standard lithium cells with IP67-rated weatherproof enclosures.

MQTT-driven industrial lighting control system with W5500 Ethernet connectivity for low-latency real-time monitoring. Features advanced scheduling automation with fallback to local firmware logic ensuring operation during network outages. Remote configuration via RESTful API enables centralized management across multiple facilities. SCADA-like telemetry provides detailed operational metrics including energy consumption, lamp hours, and fault detection. Industrial relay interfaces support high-current switching with electrical isolation and surge protection. Designed for commercial sports facilities requiring reliable automated lighting control.

Field-proven Remote Terminal Unit with Python-based firmware supporting extensive Modbus register mapping and custom protocol translation. Features automatic data normalization and cloud publishing with configurable retry logic and offline buffering. Automatic reconnect mechanisms and watchdog recovery ensure 24/7 uptime in industrial environments. Hardened design includes transient protection on RS485 interfaces and industrial temperature rating. Seamlessly integrates with existing PLC and SCADA systems as drop-in replacement or protocol converter for legacy OEM equipment. Supports Modbus RTU, Modbus TCP, and custom serial protocols.

Light-industrial service robot platform featuring 2D LIDAR-based SLAM navigation with ROS architecture for robust path planning and localization. Onboard computer vision system using wide-angle USB camera enables object recognition and obstacle detection. BLE-guided navigation mode provides precise positioning in GPS-denied indoor environments. Multi-sensor fusion combines LIDAR, vision, and inertial measurement for reliable autonomous operation in dynamic environments. Designed for F&B and hospitality automation with food-safe materials and easy sanitation. Industrial-grade motor controllers and emergency stop systems ensure safe human-robot interaction.

Industrial embedded controller for automated used cooking oil collection system featuring capacitive water contamination detection and precision weight measurement. Robust touchscreen HMI provides intuitive user interface with multi-language support. Secure MQTT cloud reporting enables real-time monitoring of collection volumes and predictive maintenance alerts based on equipment utilization patterns. Industrial-grade construction with stainless steel fluid pathways and food-safe materials. Remote diagnostics and OTA firmware updates reduce maintenance costs and downtime. Payment integration supports multiple electronic payment methods with PCI DSS compliance.

Lightweight industrial HMI web application built on Next.js providing real-time telemetry visualization for distributed IoT sensor networks. Supports multi-device monitoring with individual device ID tracking and historical data trending. Customizable alarm conditions with threshold-based alerting and notification routing. API-driven architecture enables at-scale deployment across multiple facilities and geographic locations. Compatible with on-premise and cloud MQTT brokers including AWS IoT, Azure IoT Hub, and industrial MQTT servers. Role-based access control and audit logging ensure compliance with industrial security requirements. Responsive design supports desktop SCADA stations and mobile operator interfaces.