Swegon Ventilation Binding

Introduction

Swegon ventilation binding is used to get live data from Swegon ventilation systems. Binding should be compatible with at least Swegon CASA models.

Swegon gateway

swegongw is an application that reads packets from serial port (RS-485 adapter is needed) and relays them to openHAB via UDP. Swegon ventilation binding listens on the UDP port and extracts control data from UDP packets.

C code is available here

Build command:

gcc -std=gnu99 -o swegongw swegongw.c

Execution:

swegongw -v -d /dev/ttyUSB0 -a 192.168.1.10

swegongw help is available by executing the following command:

swegongw -h 

For the installation of the binding, please see Wiki page Bindings.

Binding Configuration

openhab.cfg file (in ${openhab_home}/configurations folder).

######################## Swegon ventilation Binding ###################################
#
# UDP port (optional, defaults to 9998)
# swegonventilation:udpPort =9998

The swegonventilation:udpPort value specifies UDP port on which the binding will listen. Configuration is optional, by default binding listens on UDP port 9998.

Item Binding Configuration

In order to bind an item to the device, you need to provide configuration settings. The easiest way to do so is to add some binding information in your item file (in the folder configurations/items). Example of the item binding:

swegonventilation="<data>"

Where <data> identifies a data item. See a complete list below.

List of supported data items

Data	Item Type	Purpose	Note
T1	Number	Temperature sensor 1
T2	Number	Temperature sensor 2
T3	Number	Temperature sensor 3
T4	Number	Temperature sensor 4
T5	Number	Temperature sensor 5
T6	Number	Temperature sensor 6
T7	Number	Temperature sensor 7
T8	Number	Temperature sensor 8
OutdoorTemperature	Number	Temperature sensor	T1
SupplyAirTemperature	Number	Temperature sensor	T2
ExtractAirTemperature	Number	Temperature sensor	T3
SupplyAirTemperatureReheated	Number	Temperature sensor	T4
ExhaustAirTemperature	Number	Temperature sensor	T8
SupplyAirFanSpeed	Number	Fan speed rpm
ExtractAirFanSpeed	Number	Fan speed rpm
Efficiency	Number	Efficiency	Calculated by system
EfficiencySupply	Number	Efficiency	Calculated by binding
EfficiencyExtract	Number	Efficiency	Calculated by binding
FanSpeed	Number	Fan speed	Fan speed 1…5
PreheatState	Switch	Heating	Preheat state
ReheatState	Switch	Heating	Reheat state

Examples

Number	OutdoorTemperature	{ swegonventilation="OutdoorTemperature" }
Number	SupplyAirFanSpeed	{ swegonventilation="SupplyAirFanSpeed" }
Switch	Preheat	                { swegonventilation ="PreheatState" }