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What is OpenBMS

Features

FAQ

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What is

OpenBMS io?

223P, 135, and 231P

OpenBMS is a community-driven, vendor-neutral Building Management System that connects BACnet, MQTT, and modern IoT protocols, aligning with ASHRAE standards such as 223P, 135, and 231P, to create open, interoperable, and sustainable building ecosystems.

Interoperable

Connect any device, any protocol. OpenBMS bridges legacy systems with modern IoT infrastructure seamlessly.

Vendor-Neutral

No lock-in, no proprietary constraints. Build your system your way with complete freedom and transparency.

Community-Driven

Built by experts, for everyone. Join thousands shaping the future of building automation together.

Why Choose

OpenBMS?

Open source innovation meets enterprise reliability

built for tomorrow's requirements

30-50% HVAC Energy Savings

Pre-integrated ASHRAE G36 sequences deliver proven energy reductions as a core feature, not an expensive add-on.

Coming Soon

Eliminate Vendor Lock-in

Fully open-source platform frees you from proprietary systems that trap buildings with a single vendor for decades.

10-25% Software-Only Savings

G36 reprogramming delivers significant savings with 2-7 year payback periods—no hardware changes needed.

Coming Soon

ASHRAE 223P Semantic Modeling

Native support for the latest ASHRAE standard ensures your building data is structured, meaningful, and future-proof.

Coming Soon

50% Fewer Comfort Complaints

G36 standardized sequences reduce temperature-related complaints by nearly 50% alongside energy savings.

Coming Soon

True BACnet Interoperability

Built from the ground up for BACnet compliance—mix and match equipment from any manufacturer.

Visual Programming

No-code/low-code interface lets integrators configure control logic without deep programming expertise.

Portable Building Data

Your semantic model belongs to you and moves with you—change contractors, vendors, or platforms freely.

Coming Soon

Simulate Before You Deploy

FMU export with LBNL Modelica Buildings Library tests control sequences virtually before going live.

Built-in Demand Response

Respond to grid signals and price spikes with G36's native Demand Limiting sequences that maintain comfort.

Coming Soon

Zero Licensing Fees

No per-point charges or annual contracts. Dramatically lower total cost of ownership.

Semantic Validation Built-in

BuildingMOTIF integration validates your building model conforms to standards automatically.

Coming Soon

AI-Assisted Semantic Mapping

AI copilot maps BACnet points to ASHRAE 223P, suggests configurations, and explains logic in plain language.

Coming Soon

Easier Troubleshooting

G36's documented, consistent logic means any mechanical engineer can understand the system without reverse-engineering.

Coming Soon

Integrator Empowerment

Independent integrators can compete with large OEMs without being beholden to their terms.

Built for Decarbonization

Ready for electrification, grid-interactive buildings, and carbon reduction mandates becoming law.

Coming Soon

Frequently Asked Questions

Everything you need to know about OpenBMS

Why choose open source over proprietary BMS software?

Open source BMS software offers transparency, flexibility, and cost-effectiveness. You're not locked into a single vendor, can customize the system to your exact needs, and benefit from community-driven improvements. With OpenBMS, you own your infrastructure and data completely.

What hardware does OpenBMS support?

Runs on industrial edge platforms like Revolution Pi. Supports any BACnet IP compatible controller.

How can I contribute or get support?

We'd love to hear from you. Join our Discord community to ask questions, share ideas, or connect with other building automation professionals. To contribute code or report issues, head over to our GitHub repository.