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Indoor air quality sensor (room) · BACnet points list
Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) BACnet points list
Updated 12 November 2026
The UNOlite is a room air quality monitor with an RS-485 port that runs Modbus or BACnet MS/TP (DIP switch 7 ON). Over BACnet it reports temperature, humidity, PM1/PM2.5/PM10, CO2, TVOC, an IAQ index and the RESET viral index (RVI), and has writable values for MAC address, sensor calibration, CO2 self-calibration, display and IAQ LED thresholds.
This page lists 29 BACnet objects for the Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) — 15 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Delta Electronics’s own free documentation, linked below.
- Manufacturer
- Delta Electronics
- Model
- UNOlite indoor air quality monitor (BACnet MS/TP)
- Equipment
- Indoor air quality sensor (room)
- Equipment type
- Thermostats, sensors & meters
- BACnet objects
- 29 (15 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Default device instance
- From the serial number (e.g. SN 2301L0170040 gives 010040)
- Also known as
- UNOlite, UNOlite LWD, Delta UNOlite, UNOLite BACnet
- Source document
- UNOlite BACnet User Guide · rev. VER 0.5
Reference only, provided as-is: verify against Delta Electronics’s current documentation and the live device before use. Not official Delta Electronics information. Terms of use.
BMS integration notes: Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP)
Set DIP 7 ON for BACnet, DIP 1-4 for the MAC address (0-15) and DIP 5-6 for the baud rate, then read the measurements. Use AV 0 for MAC addresses above 15.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| AI 5 | CO2 | CO2, ppm | Read |
| AI 0 | Temperature | Room temperature, °C | Read |
| AI 1 | Humidity | Relative humidity, % | Read |
| AI 2 | PM2.5 | PM2.5, µg/m³ | Read |
| AI 7 | TVOC | TVOC, ppm | Read |
| AI 8 | IAQ | Air quality index (green 0-80, red above 100) | Read |
Network setup
- DIP 7 ON = BACnet MS/TP, OFF = Modbus. DIP 8 = 120 ohm terminator. Set DIPs with power off.
- DIP 1-4 set MAC 0-15; DIP 5-6 set baud: both OFF 76800, then 9600, 19200, 38400.
- AV 0 sets any MAC 0-127 and overrides the DIPs; the device reboots after the write.
- Device instance comes from the serial number and is writable; factory reset restores it. Max_Master 127.
Watch out for
- Writing AV 2 CO2_Cali turns off CO2 self-calibration (AV 3 goes to 0).
Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AImin | 0 | Temperature | Temperature, 0-50 | °C | Read | |
| AImin | 1 | Humidity | Relative humidity, 10-80 | % | Read | |
| AImin | 2 | PM2.5 | PM2.5, 0-1000 | µg/m³ | Read | |
| AI | 3 | PM10 | PM10, 0-1000 | µg/m³ | Read | |
| AI | 4 | PM1 | PM1, 0-1000 | µg/m³ | Read | |
| AImin | 5 | CO2 | CO2, 400-5000 | ppm | Read | |
| AI | 6 | Temperature_F | Temperature in Fahrenheit | °F | Read | |
| AImin | 7 | TVOC | TVOC, 0-30 | ppm | Read | |
| AImin | 8 | IAQ | Air quality index from PM and CO2 (drives IAQ LED) | Read | ||
| AI | 9 | TVOC_ugm3 | TVOC, 0-7000 | µg/m³ | Read | |
| AI | 10 | RVI | Viral infection risk index, 0-99 (higher is better) | % | Read | |
| AI | 11 | RVI_Label | RVI category | Read | 0=Poor; 1=Unsatisfactory; 2=Needs Improvement; 3=Fair; 4=Good; 5=Excellent | |
| AV | 0 | MAC Address | MS/TP MAC 0-127; overrides DIP; 255 clears; reboots | Write | ||
| AV | 1 | Temperature_Cali | Write actual temperature x100 to calibrate | °C | Write | |
| AV | 2 | CO2_Cali | Write actual CO2 (400-1500) to calibrate; disables ASC | ppm | Write | |
| AV | 3 | CO2_ASC | CO2 automatic self-calibration on/off | Write | 0=Off; 1=On | |
| AV | 4 | Dim Mode | LED/screen dimming mode | Write | 0=Auto-Dim (LWD only); 1=Dim disabled; 2=Dim | |
| AV | 5 | PM_Cali | PM2.5 reference 20-1000 for calibration; 9999 resets | Write | ||
| AV | 6 | RESET_TVOC | Write 1 to reset the TVOC baseline | Write | ||
| AV | 7 | EN_CUS_IAQ | Enable custom IAQ LED thresholds | Write | ||
| AV | 8 | IAQ_PM25 | IAQ LED threshold for PM2.5 | Write | ||
| AV | 9 | IAQ_PM10 | IAQ LED threshold for PM10 | Write | ||
| AV | 10 | IAQ_CO2 | IAQ LED threshold for CO2 | Write | ||
| AV | 11 | ECO_PWR | UNOeco ventilation power suggestion | Read | ||
| AV | 12 | ECO_SPD | UNOeco ventilation speed suggestion | Read | ||
| AV | 13 | Set_OLED_Fahrenheit | Display temperature unit | Write | 0=Celsius; 1=Fahrenheit | |
| AV | 14 | Set_Low_Power | Sensor power mode | Write | 0=Normal; 1=Low power | |
| AV | 15 | HUMI_Cali | Humidity calibration, 1000-9000 (x100); 9999 resets | % | Write | |
| AV | 16 | TVOC_Cali | TVOC reference 1-500 ppb for calibration; 9999 resets | ppb | Write |
No points match these filters.
Object ID lookup: Delta Electronics UNOlite indoor air quality monitor point IDs by name
AI0TemperatureAI1HumidityAI2PM2.5AI3PM10AI4PM1AI5CO2AI6Temperature_FAI7TVOCAI8IAQAI9TVOC_ugm3AI10RVIAI11RVI_LabelAV0MAC AddressAV1Temperature_CaliAV2CO2_CaliAV3CO2_ASCAV4Dim ModeAV5PM_CaliAV6RESET_TVOCAV7EN_CUS_IAQAV8IAQ_PM25AV9IAQ_PM10AV10IAQ_CO2AV11ECO_PWRAV12ECO_SPDAV13Set_OLED_FahrenheitAV14Set_Low_PowerAV15HUMI_CaliAV16TVOC_Cali
Integration notes
- The object table has no access column; AVs are marked writable from their descriptions except AV 11/AV 12, which the guide describes as outputs to another controller.
- AV 4 Auto-Dim applies to the LWD model only.
- A sensor object's Out_Of_Service = true means that sensor is unhealthy; power cycle to recover.
- Units for AV 11, AV 12 and the IAQ thresholds are not printed.
- Different object set and numbering from the UNOnext and UNOslim (e.g. AI 4 is PM1 here, CO2 on UNOnext).
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the UNOlite indoor air quality monitor (BACnet MS/TP) and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP)
How many BACnet points does the Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) have?
This list has 29 BACnet objects: 12 analog inputs, 17 analog values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) BACnet points are writable?
15 of the 29 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done. The source has no read/write column, so this is inferred from object type.
Where is the official Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP) BACnet documentation?
The source is UNOlite BACnet User Guide, revision VER 0.5, published free by Delta Electronics at https://isdweb.deltaww.com/resources/files/UNOlite_bacnet_user_guide.pdf.
What are the minimum BACnet points to integrate the Delta Electronics UNOlite indoor air quality monitor (BACnet MS/TP)?
Start with AI 5 CO2 (CO2, ppm); AI 0 Temperature (Room temperature, °C); AI 1 Humidity (Relative humidity, %); AI 2 PM2.5 (PM2.5, µg/m³); AI 7 TVOC (TVOC, ppm); AI 8 IAQ (Air quality index (green 0-80, red above 100)).
How do I check these points on the real UNOlite indoor air quality monitor (BACnet MS/TP)?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Delta Electronics BACnet points lists
- Power and energy meter (panel meter)
Delta Electronics DPM-C530A power meter (BACnet MS/TP)
Delta Electronics DPM-C530A multifunction power meters on BACnet MS/TP.
Also known as: DPM-C530A, Delta DPM-C530, Delta multifunction power meter BACnet - Indoor air quality sensor (room)
Delta Electronics UNOnext indoor air quality monitor (BACnet MS/TP)
Delta UNOnext indoor air quality monitors in the BACnet MS/TP version.
Also known as: UNOnext, Delta UNOnext, UNOnext BACnet MS/TP - Indoor air quality sensor (room)
Delta Electronics UNOslim IAQ sensor (BACnet MS/TP)
Delta UNOslim (UNO-M) RS-485 indoor air quality sensors set to BACnet MS/TP.
Also known as: UNOslim, UNO-M, Delta UNOslim, UNOslim RS485 - Variable frequency drive
Delta Electronics VFD-CP2000 (embedded BACnet MS/TP)
Delta Electronics VFD-CP2000 AC motor drives using the built-in RS-485 port as BACnet MS/TP.
Also known as: CP2000, VFD-CP2000, Delta CP2000, Delta VFD CP2000
Source: UNOlite BACnet User Guide · rev. VER 0.5. Object names, instances and units are reproduced as published; descriptions are our own.