manufacturing-rfid 2025

RFID Desktop - Hansae

Product Engineer

A collaborative project with PT Wahana Datarindo Sejahtera (WADAS) to build a desktop application for Hansae warehouse packing operations. WADAS provided the RFID hardware infrastructure (Zebra FX9600 reader), while I developed the complete software solution. The application replaces manual goods recording with accurate real-time RFID scanning, featuring dual validation (RFID + Barcode), packing list management, PO number lookup, comprehensive reporting, and full offline capability.

Flutter .NET 8 SQLite REST API SSE Zebra FX9600 Riverpod

Project Highlights

Real-time RFID tag streaming via Zebra FX9600 reader with 8-antenna support

Dual validation system combining RFID scanning with barcode verification (HPRT N80)

Offline-first architecture with local SQLite database for uninterrupted operations

Comprehensive packing history with Excel export and multi-filter reporting

Role-based access control with JWT authentication and 30-day session management

Configurable reader settings including antenna power, sensitivity, and region selection

Project Info

Role Product Engineer

Year 2025

Category manufacturing-rfid

Tech Stack

Flutter .NET 8 SQLite REST API SSE Zebra FX9600 Riverpod

Problem → Solution → Impact

Problem

Warehouse Hansae relied on manual packing processes: slow scanning, frequent human errors, operators struggled to track items, and no RFID integration. This led to inefficiencies, delayed shipments, and difficulty maintaining accurate inventory records.

Solution

Built an offline-first desktop application with full Zebra FX9600 RFID integration, dual validation system (RFID + barcode), packing list management, user role controls, and an operational dashboard for real-time monitoring.

Impact

Packing accuracy significantly improved with dual validation
Faster packing process with real-time RFID scanning
Clear operational oversight through dashboard and reporting
No internet dependency - works fully offline
New operators can start working immediately with intuitive UI

Engineering Challenges & Solutions

Technical obstacles encountered during development and the architectural decisions made to overcome them.

Challenge

Offline-first architecture without third-party logging services

Solution

Implemented local log engine combining Flutter logging with .NET Serilog, built-in log viewer with filtering, and 30-day retention policy - all stored locally in SQLite.

Challenge

Real-time RFID streaming with high-throughput data

Solution

Designed SSE (Server-Sent Events) pipeline from Zebra FX9600 through .NET bridge to Flutter, with tag deduplication at 500-1000ms intervals to handle rapid consecutive reads.

Challenge

Dual validation system (RFID + Barcode) with zero false-positives

Solution

Built hybrid matching engine that cross-references RFID EPC codes with EDI barcodes, ensuring each scanned item is validated against the packing list before marking as complete.

Challenge

Configurable multi-antenna RFID reader management

Solution

Created abstraction layer for Zebra FX9600 8-antenna configuration, allowing per-antenna power level control, sensitivity adjustment, and region selection through a user-friendly settings UI.

Challenge

Session management with long-lived authentication

Solution

Implemented JWT-based authentication with auto-refresh tokens, enabling 30-day sessions without re-login while maintaining security through role-based access control.

Architecture Overview

The system follows a layered architecture with clear separation between presentation, business logic, and hardware integration. Flutter handles the UI layer with Riverpod state management, communicating with a .NET 8 Worker Service that acts as a bridge between the application and RFID hardware.

Presentation

Flutter Desktop Riverpod State

Communication

REST API SSE Stream

Backend

.NET 8 Worker Service JWT Auth

Data

SQLite Database Serilog

Hardware

Zebra FX9600 HPRT N80 Scanner

User Interface

Data Flow