Sdr on Jeff Mixon | jeffmixon.comhttps://www.jeffmixon.com/tags/sdr/Recent content in Sdr on Jeff Mixon | jeffmixon.comHugoen-usMon, 22 Jun 2026 16:04:57 -0700Reverse-engineering Security+ garage-door rolling codeshttps://www.jeffmixon.com/post/garage-door-rolling-codes-reversed/Thu, 14 Sep 2023 00:00:00 -0700https://www.jeffmixon.com/post/garage-door-rolling-codes-reversed/A weekend that turned into a project: a clean-room software reimplementation of the Security+ and Security+ 2.0 garage-door rolling-code systems, framed as an RF reverse-engineering exercise.