What is
OpenBMS io?
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, Bacnet/IP, 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
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?
OpenBMS is designed to be hardware-agnostic and works with standard industry protocols like BACnet and MQTT. It supports a wide range of devices from major manufacturers including Honeywell, Johnson Controls, Siemens, and many more. If it speaks BACnet or MQTT, OpenBMS can integrate it.
How can I contribute or get support?
Open source solution for your
Building Automation
Building with the community not just for it
BACnet
MQTT
ASHRAE Standards
Open Source
OpenBMS
Open Source Building Automation
© 2025 OpenBMS. All rights reserved.
Documentation
License
Contact
Join the community!
The OpenBMS io community is a great place to collaborate, share ideas, and get support.
Pre-Release
Get early access and shape the product
Open Source
100% transparent and community-driven
Active Community
Join developers and experts worldwide
Open source solution for your
Building Automation
Building with the community not just for it
BACnet
MQTT
ASHRAE Standards
Open Source
What is
OpenBMS io?
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, BACNET/IP, 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
True BACnet Interoperability
Built from the ground up for BACnet compliance—mix and match equipment from any manufacturer.
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
Visual Programming
No-code/low-code interface lets integrators configure control logic without deep programming expertise.
Simulate Before You Deploy
FMU export with LBNL Modelica Buildings Library tests control sequences virtually before going live.
Zero Licensing Fees
No per-point charges or annual contracts. Dramatically lower total cost of ownership.
Integrator Empowerment
Independent integrators can compete with large OEMs without being beholden to their terms.
Portable Building Data
Your semantic model belongs to you and moves with you-changes contractors, vendors, or platforms freely.
Coming Soon
Built-in Demand Response
Respond to grid signals and price spikes with G36's native Demand Limiting sequences that maintain comfort.
Coming Soon
Semantic Validation Built-in
BuildingMOTIF integration validates your building model conforms to standards automatically.
Coming Soon
Easier Troubleshooting
G36's documented, consistent logic means any mechanical engineer can understand the system without reverse-engineering.
Coming Soon
Built for Decarbonization
Ready for electrification, grid-interactive buildings, and carbon reduction mandates becoming law.
Coming Soon
AI-Assisted Semantic Mapping
AI copilot maps BACnet points to ASHRAE 223P, suggests configurations, and explains logic in plain language.
Coming Soon
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?
OpenBMS is designed to be hardware-agnostic and works with standard industry protocols like BACnet and MQTT. It supports a wide range of devices from major manufacturers including Honeywell, Johnson Controls, Siemens, and many more. If it speaks BACnet or MQTT, OpenBMS can integrate it.
How can I contribute or get support?
We offer multiple ways to contribute and get support. Join our Discord community for real-time discussions, check our GitHub repository for code contributions, or participate in our documentation efforts. Our community includes building automation experts, developers, and facility managers ready to help.
Join the community!
The OpenBMS io community is a great place to collaborate, share ideas, and get support.
Pre-Release
Get early access and shape the product
Open Source
100% transparent and community-driven
Active Community
Join developers and experts worldwide
OpenBMS
Open Source Building Automation
Documentation
License
Contact
© 2025 OpenBMS. All rights reserved.
Frequently Asked Questions
Everything you need to know about OpenBMS