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FileLink Discovery Prototype

FileLink is a prototype system for discovering and managing ESP32-based devices from a Windows WPF application. The Windows client finds devices through mDNS; the ESP32 firmware provides an HTTP interface over a local Ethernet or Wi-Fi connection.

Start here

1. Read Setup before preparing a device or workstation.
2. Read Operating a Device for discovery, connection, SD-card, settings, and RS232 workflows.
3. Read Security Boundaries before placing the device on a network.

Implemented areas

Area	Status	Notes
Device discovery	CONFIRMED	mDNS service _filelink._tcp.local.
Ethernet/Wi-Fi networking	CONFIRMED	Ethernet-first boot; Wi-Fi/provisioning fallback.
SD storage and transfers	CONFIRMED	Streaming transfers with CRC32 checks. could use throughput improvements.
RS232 transport	CONFIRMED	Raw UART configuration/read/write through HTTP.
OTA mechanics	CONFIRMED	Inactive OTA partition write, validation, boot selection, reboot.
Multi-slot Wi-Fi selection	PARTIALLY IMPLEMENTED	Up to five slots can be stored; boot/fallback uses primary slot 0.
OLED and button UI	PARTIALLY IMPLEMENTED	Hardware setup only; no rendered/local UI is established.
Physical HP 7550A compatibility	UNCONFIRMED	Software package exists; physical test result was not supplied.

Critical boundaries

• HTTP is plain HTTP, not HTTPS.
• Provisioning starts an open access point.
• Device passwords are not a visible global authorization layer for ordinary APIs.
• No project-owned automated test results or physical validation records were supplied.

Use the sidebar to explore the implementation and its limitations.