PC Checker Dongle
Diagnostics on a $15 stick — no reboot
The PC Checker Dongle is firmware for the inexpensive LILYGO T-Dongle-S3. Flash it once from your browser, then keep it on your keychain. Plug it into any running computer, connect your phone to the dongle’s own Wi-Fi, and run a full diagnostic without rebooting the machine. The dongle’s little screen shows a QR code to connect, and everything happens in a captive-portal dashboard.
Capabilities
In-browser flashing
Connect the dongle over USB and flash the firmware directly from a desktop browser. No drivers, no command line.
No-reboot diagnostics
The dongle plugs into a running computer and gathers results without disturbing the machine’s current session.
Captive-portal dashboard
The dongle hosts its own Wi-Fi and a mobile dashboard. Scan the QR code on its screen and you’re in.
Choose OS and profile
Select the target operating system and a workload profile, tap Run Scan, and watch the scores and grade come back.
PDF report
Export the same professional capability report you get from the bootable edition.
Use cases
Repair & resale shops
Check machine after machine without rebooting each one into a diagnostic USB.
Buying in person
Keep it on your keychain and scan a seller’s PC on the spot.
On-site IT
A pocket diagnostic tool for desks you can’t take offline.