Discover Devices
Broadcast Who-Is across a BACnet/IP network or a routed range, and list every device with its object list.
Protocol Support
BACnet Integration
Read chillers, air handlers and VAV boxes over BACnet/IP and BACnet MS/TP, with COV subscriptions so changes arrive when they happen.
- Standard
- ASHRAE 135 / ISO 16484-5
- Medium
- Ethernet (BACnet/IP, BACnet/SC) or RS-485 (MS/TP)
- Topology
- Peer to peer, routed between networks
- Data Model
- Objects with properties: Analog Input, Analog Value, Binary, Multi-state, Schedule, Trend Log
What BACnet Is
BACnet is the open standard most building management systems use to talk to HVAC equipment. Every device exposes objects (a temperature input, a fan command, a schedule) and every object has properties, the most important being present value. Devices announce themselves with Who-Is and I-Am, then answer ReadProperty requests or push changes through COV subscriptions.
Native address
Device 1204
analog-input,3
present-value
units: degrees-celsius
Normalized tag
site.tower-a.ahu-02.supply-air-temp
13.4°C
How IoTServa Connects BACnet
Subscribe to Changes
Use COV where the controller supports it, and fall back to scheduled ReadPropertyMultiple polling where it does not.
Write With Priority
Send WriteProperty commands at a chosen priority-array level, and release it cleanly so you never leave an override stuck.
MS/TP and IP Together
Read RS-485 MS/TP trunks through a wired gateway and BACnet/IP controllers on the LAN in the same project.
Typical Jobs
- Chilled water and AHU monitoring
- VAV zone temperature and damper trending
- Schedule and setpoint changes from one console
- Alarm forwarding from legacy BMS controllers
Plan for These
Device instance numbers must be unique across the whole internetwork. Duplicates cause silent misreads.
MS/TP trunks are slow and shared. Polling too many points starves the bus, so COV and sensible poll groups matter.
Writes land in a priority array. Agree who owns which priority before enabling control.
BACnet Questions
Does IoTServa support BACnet/IP and MS/TP?
Yes. BACnet/IP controllers are read over your LAN, and MS/TP trunks are read through a wired RS-485 gateway.
Can IoTServa write to BACnet points?
Yes, with a chosen priority level, and writes can be switched off per site so a monitoring-only project stays read-only.
Bring Your BACnet Devices. We Will Read Them.
Tell us the make and model of what is on site. We will scope a pilot against your real equipment.