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Updating README with instructions on how to access a UART shell on the device #5

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Update README.md
jamiejones85 Oct 14, 2025
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Adding image to show UART
jamiejones85 Oct 14, 2025
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Merge branch 'main' of github.com:jamiejones85/B5300-reverse-engineering
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Expand Up @@ -8,6 +8,15 @@ Any and all contribution is welcomed and encouraged!

There's a UART TX pad on the board, this outputs UART at 500k baud. Log from boot in logs folder.

You can access a shell using the UART, the startup.sh needs editing the comment out the insmod d:\apps\desktop.mod line and then rebuild and flash back otherwise the desktop.mod will be writing to the uart constantly.

On the back of the PCB there's what looks like an unpopulated connector, the RX, TX and GND can be found on here.
<img src="PXL_20251014_144721978.jpg" alt="Sample Image" width="400" height="300">

Orange is GND, Black is TX, Green is RX. After it has booted you'll have shell access. Obviously the desktop app doesn't automatically run anymore.

insmod d:\apps\desktop.mod

## Tutorials

- [1. How-To: Extract your firmware](docs/1-extracting-firmware.md)
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