https://euphoricair7.github.io/mycosite/projects/Recent content in Projects on euphoricair7Hugoen-usWed, 03 Jun 2026 00:00:00 +0000https://euphoricair7.github.io/mycosite/projects/fingerprint_driver/Wed, 03 Jun 2026 00:00:00 +0000https://euphoricair7.github.io/mycosite/projects/fingerprint_driver/<p>The FT9201 fingerprint scanner has essentially no Linux support.</p> <p>What looked like a cheap USB fingerprint reader turned into a months-long reverse engineering rabbit hole involving USB traces, stripped Windows drivers, vendor protocols, firmware state machines, and a surprising amount of yelling at a device that refused to wake up.</p> <p>This post documents the first half of that journey: figuring out how the scanner actually talks.</p>https://euphoricair7.github.io/mycosite/projects/glyph/Mon, 22 Dec 2025 00:00:00 +0000https://euphoricair7.github.io/mycosite/projects/glyph/<p>glyph glyph glyph</p>