# KM200 Binding

The KM200 Binding is communicating with a Buderus Logamatic web KM200 / KM100 / KM50 (opens new window). It is possible to receive and send parameters like string or float values.

Important: If the communication is not working and you see in the logfile errors like "illegal key size" then you have to change the Java Cryptography Extension to the Unlimited Strength Jurisdiction (opens new window).

# Supported Things

This binding supports 11 different things types

Thing UI Only Description
appliance The appliance (The heater inside of this heating system).
dhwCircuit A hot water circuit.
gateway The gateway. (The connected KM200/100/50 device).
heatingCircuit A heating circuit.
heatSource The heat source.
holidayMode The holiday modes configuration.
sensor The sensors.
solarCircuit A solar circuit.
system The system without sensors and appliance.
notification The notifications.
switchProgram X A switch program.

# KM 50/100/200

This Binding is tested on a KM200 but it should work on KM50 and KM100, too.

# Discovery

This binding discovers KM devices through mDNS in the local network.

# Thing Configuration

# kmdevice

The kmdevice bridge requires the following configuration parameters:

Parameter Label Parameter ID Description Required Default Example
IP address ip4_address The IP address of the KMXXX device true
Refresh Interval refreshInterval The refresh interval in seconds which is used to poll the device. true 30 30
Private Key privKey Take a look to the internet. Maybe you will find a way for generation. true 0000FFFFEEEEDDDDCCCCBBBBAAAA999988887777666655554444333322221111
Read Delay readDelay Delay between two read attempts in ms. true 100 100
Maximum Number Of Repeats maxNbrRepeats Maximum number of repeats in case of a communication error (like HTTP 500 error). true 10 10

# Channels

This binding creates the channels depending on the connected heating system fully automatically. These channels depend on the connected heating system. You can see the complete list of supported channels of the thing in the UI. There is no official documentation for the parameters available from Buderus, so the names of the channels is all that reflects their purpose.

# Full Examples

This example reads different values of items from a KMXXX Device.


Bridge km200:kmdevice:0815 "testKMDevice" @ "Room" [ privateKey= "1234567890abcdef1234567890abcdef", maxnbrrepeats=10.0, readDelay=100, refreshInterval=30, maxNbrRepeats=10, ip4Address="", refreshinterval=30.0, readdelay=100.0 ] {
 heatingCircuit 1 "TestHC1"
 sensor 1 "TestSensors"


Number  budWater  "Water temperature  [%.1f °C]"    {channel="km200:dhwCircuit:0815:1:actualTemp"}
Number  budOutdoor  "Outdoor temperature  [%.1f °C]"    {channel="km200:sensor:0815:1:outdoor_t1"}