https://gbu.im/ Igor Biletski's workshop on the web: vintage computers, home-built hardware, reverse engineering, and notes from the workbench. en-us https://gbu.im/2026/03/12/resideo-thermostat-reverse-engineering.html https://gbu.im/2026/03/12/resideo-thermostat-reverse-engineering.html Thu, 12 Mar 2026 00:00:00 -0400 Tracing OAuth, mapping the API, and bringing the Lyric T6 into Home Assistant. https://gbu.im/2026/03/12/pool-temp-reverse-engineering.html https://gbu.im/2026/03/12/pool-temp-reverse-engineering.html Thu, 12 Mar 2026 00:00:00 -0400 Following the H5109 from its 433 MHz radio link to a cloud API and Home Assistant. https://gbu.im/2026/03/09/reverse-engineering-gulfstream-compass-wifi.html https://gbu.im/2026/03/09/reverse-engineering-gulfstream-compass-wifi.html Mon, 09 Mar 2026 00:00:00 -0400 From an Android app to a working Home Assistant integration for a pool heat pump. https://gbu.im/2025/01/15/dissecting-hdos-diskette.html https://gbu.im/2025/01/15/dissecting-hdos-diskette.html Wed, 15 Jan 2025 00:00:00 -0500 Inside a Heath diskette: sectors, directories, and the structures that hold everything together.