NetSurvey

01 / THE PROBLEM

Problem & objectives

Help field engineers connect Wi-Fi measurements to physical locations and produce useful installation documentation without an account or backend.

An offline Android Wi-Fi site-survey tool connecting floor plans, real signal readings, access-point inventory, estimated heatmaps, and local reports for field engineers.

02 / THE SYSTEM

Architecture & technology

Compose screens and ViewModels call Room/DataStore repositories and an Android Wi-Fi adapter. Domain utilities calculate signal statistics and bounded inverse-distance heatmaps, while local exporters produce reports and backups.

1. Floor plan & site walk
2. Android Wi-Fi readings
3. Coverage estimates & reports

03 / THE BUILD

Implementation & key features

• Floor-plan import and two-point scale calibration
• Permission-aware Wi-Fi scans and connected signal meter
• Measured RSSI points, labeled heatmap estimates, and AP inventory
• PDF, CSV, PNG reports and local ZIP backup/restore

04 / THE BOUNDARIES

Security & reliability

Design notes and review considerations documented alongside this project:

• Projects and measurements remain on the device
• Android permissions and scan freshness are shown explicitly
• Reports may reveal floor plans and network identifiers
• Heatmap interpolation is an estimate, not a measurement everywhere

05 / THE DECISIONS

Challenges & trade-offs

Android permissions, hardware capabilities, and scan throttling limit observations. Interpolation and AP-placement advice need on-site validation. The independent browser demo accepts supplied readings and cannot scan Wi-Fi.

06 / THE RESULT

Outcome & engineering takeaways

A local field-survey workflow with timestamped measurements, inventory, and exports. The product website also offers a browser demo with clearly stated native limitations.

The engineering takeaway is to make the system’s capabilities and limits explicit. The repository documents the implementation and its current scope.