Project Haystack is an open source initiative to streamline working with data from the Internet of Things. We standardize semantic data models and web services with the goal of making it easier to unlock value from the vast quantity of data being generated by the smart devices that permeate our homes, buildings, factories, and cities. Applications include automation, control, energy, HVAC, lighting, and other environmental systems.
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WGs are addressing additional equipment systems and applications for the built environment.
Are you new to Project Haystack?
Start here with our primer Introduction to Project Haystack.
Dig a little deeper into a reference implementation "Applying Haystack Tagging to a Sample Building".
Important updates for the Project Haystack community.
The Haystack Labs working group has been on a roll. Over the past couple of months, a series of commits to the Xeto GitHub repository have landed meaningful advances across multiple domains — from valve and damper modeling to AC power normalisation to a brand-new proposal for modeling motors and VFDs. Here's a quick roundup.
Project Haystack’s webinar, “Haystack 5 and Xeto for Python Developers,” led by Rick Jennings (SkyFoundry) and Scott Muench (J2 Innovations), delivered a fast, focused walkthrough of Haystack 5’s major new capabilities—especially how to use them hands-on in Python.
This webinar from July 23, 2025 emphasized the critical role of metadata validation in achieving true interoperability in smart buildings. Xeto, a new open-source tool and specification repository, was introduced as the foundation for Haystack 5’s next-generation capabilities.
The Latest Press Releases by the Project Haystack community.
Richmond, VA – May 13, 2025 – The Project Haystack Organization (www.project-haystack.org), a 501(c) non-profit focused on advancing data modeling and interoperability for IoT devices, smart equipment, and building systems, announced several groundbreaking developments at its biennial conference, Haystack Connect 2025, held May 6–8.
Richmond, VA – August 7, 2024 – The Project Haystack Organization (www.project-haystack.org), a 501(c) non-profit organization focused on developing common standards to streamline the interchange and interoperability of data among IoT devices, smart equipment and systems, has announced the dates and venue for its Haystack Connect 2025 Conference.
Haystack Connect 2025 will take place May 6-8, 2025, at The Westin Washington, D.C. City Center.
Richmond, VA – June 11, 2024 – The Project Haystack Organization (www.project-haystack.org), a collaborative community addressing the challenge of utilizing semantic modeling and tagging to streamline the interchange of data among different systems, devices, equipment and software applications, today announced two new corporations have joined the Project Haystack organization. The two new Associate Member companies are Air-TraXX B.V. and Innon Energy Ltd.
Brian Frank, Technical Lead, Project Haystack and XETO Update.
"Haystack Essentials" eLearning Course
Making it easy to fetch and structure data from a Haystack server within a Jupyter Notebook using Python.
Installing and configuring EMIS applications will play a smaller role while metadata model creation will play a larger one.
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