https://pavelguzenfeld.com/tags/serial/Recent content in Serial on Pavel Guzenfeldhttps://pavelguzenfeld.com/images/og-default.pnghttps://pavelguzenfeld.com/images/og-default.pngHugoen-usMon, 01 Jun 2026 00:00:00 +0000https://pavelguzenfeld.com/posts/finding-an-undocumented-serial-ahrs-on-jetson/Mon, 01 Jun 2026 00:00:00 +0000https://pavelguzenfeld.com/posts/finding-an-undocumented-serial-ahrs-on-jetson/A small AHRS was wired to a Jetson over USB, but nobody wrote down which serial port. Here’s how I tracked it down by its protocol instead of its name, fell into the classic dialout permissions trap, and decoded its orientation stream into human-readable numbers.