TES — Engineering notes https://tesbms.com/blog/ Notes from the engineers building TES building-automation systems. en A guest room should not need your server to work https://tesbms.com/blog/room-must-work-without-the-server/ https://tesbms.com/blog/room-must-work-without-the-server/ Energy setback that lives on a central server stops saving the moment the network drops. Why we put the policy on the module in the room instead. TCMsys Mon, 17 Aug 2026 00:00:00 GMT Integrating a PMS with a building system: what actually breaks https://tesbms.com/blog/pms-integration-what-actually-breaks/ https://tesbms.com/blog/pms-integration-what-actually-breaks/ Duplicate deliveries, out-of-order events, late corrections and WAN flaps — what breaks when a PMS meets a building system, and what we changed. Integration Fri, 14 Aug 2026 00:00:00 GMT What running 300 properties taught us https://tesbms.com/blog/lessons-from-300-properties/ https://tesbms.com/blog/lessons-from-300-properties/ Honest notes from operating a hospitality control fleet: the patterns that paid off, the shortcuts that cost more than they saved, and why we stopped polling. Field notes Mon, 10 Aug 2026 00:00:00 GMT