LCN


The lcn integration for Home Assistant allows you to connect to LCN hardware devices.

The integration requires one unused license of the coupling software LCN-PCHK (version >2.8) and an LCN hardware coupler. Alternatively, an LCN-PKE coupler can be used which offers two PCHK licenses. With this setup sending and receiving commands to and from LCN modules is possible.

There is currently support for the following device types within Home Assistant:

Please note: Besides the implemented platforms, the lcn integration offers a variety of service calls. These service calls cover functionalities of the LCN system, which cannot be represented by the platform implementations. They are ideal to be used in automation scripts or for the template platforms.

Configuration

To use your LCN system in your installation, add the following lines to your configuration.yaml file. You have to specify at least one IP/port with login credentials for a PCHK host. Consider to store your credentials in a secrets.yaml.

lcn:
  connections:
    - name: myhome
      host: 192.168.2.41
      port: 4114
      username: lcn
      password: lcn

  binary_sensors:
    - name: Kitchen window
      address: myhome.s0.m7
      source: binsensor1

  climates:
    - name: Temperature bedroom
      address: myhome.s0.m7
      source: var1
      setpoint: r1varsetpoint
      min_temp: 17.
      max_temp: 30.
      lockable: true
      unit_of_measurement: °C

  covers:
    - name: Living room cover
      address: myhome.s0.m7
      motor: motor1

  lights:
    - name: Bedroom light
      address: myhome.s0.m7
      output: output1
      dimmable: true
      transition: 5

  scenes:
    - name: Romantic
      address: myhome.s0.m7
      register: 1
      scene: 4
      outputs: [output1, output2, relais1, relais3, relais4]
      transition: 5

  sensors:
    - name: Temperature
      address: myhome.s0.m7
      source: var3
      unit_of_measurement: °C

  switches:
    - name: Sprinkler switch
      address: myhome.s0.m7
      output: relay1

Configuration Variables

connections

(map)(Required)

List of your connections.

host

(string)(Required)

IP address of the LCN-PCHK host.

port

(integer)(Required)

Port of the LCN-PCHK host.

username

(string)(Required)

Login username for the LCN-PCHK host.

password

(string)(Required)

Login password for the LCN-PCHK host.

name

(string)(Optional)

Optional connection identifier. If omitted, the connections will be named consecutively as pchk, pchk1, pchk2, …

Default value:

pchk

sk_num_tries

(integer)(Optional)

Segment coupler scans. Increase this number if you have at least one segment coupler in your system.

Default value:

0

dim_mode

(string)(Optional)

Dimming mode for connected modules. The operation mode is programmed into the LCN modules by the LCN-PRO software and depends on their firmware. If you experience unexpected dimming behavior, the connection is probably in the wrong operation mode. Possible values: steps50, steps200

Default value:

steps50

binary_sensors

(map)(Optional)

List of your binary sensors.

name

(string)(Required)

Name of the sensor.

address

(string)(Required)

Address of the module/group.

source

(string)(Required)

Sensor source (BINSENSOR, SETPOINT, KEYS).

climates

(map)(Optional)

List of your climate devices.

name

(string)(Required)

Name of the climate controller.

address

(string)(Required)

Address of the module/group.

source

(string)(Required)

Current temperature source (VARIABLE).

setpoint

(string)(Required)

Setpoint for target temperature (VARIABLE, SETPOINT).

unit_of_measurement

(string)(Optional)

Measurement unit (VAR_UNIT).

Default value:

celsius

min_temp

(float)(Optional)

Minimum target temperature.

Default value:

max_temp

(float)(Optional)

Maximum target temperature.

Default value:

lockable

(boolean)(Optional)

Climate control can be locked.

Default value:

false

covers

(map)(Optional)

List of your covers.

name

(string)(Required)

Name of the cover.

address

(string)(Required)

Address of the module/group.

motor

(string)(Required)

Motor port (MOTOR_PORT).

reverse_time

(string)(Optional)

Reverse time (REVERSE_TIME, see also Cover).

lights

(map)(Required)

List of your lights.

name

(string)(Required)

Name of the light.

address

(string)(Required)

Address of the module/group.

output

(string)(Required)

Light source (OUTPUT_PORT, RELAY_PORT).

dimmable

(boolean)(Optional)

Enable the dimming feature for this light.

Default value:

false

transition

(integer)(Optional)

Transition (ramp) time in seconds.

Default value:

0

scenes

(map)(Optional)

List of your scenes.

name

(string)(Required)

Name of the scene.

address

(string)(Required)

Address of the module/group.

register

(integer)(Required)

Number of scene register (0..9).

scene

(integer)(Required)

Number of scene (0..9).

outputs

(list)(Optional)

List of ports (OUTPUT_PORT, RELAY_PORT).

transition

(integer)(Optional)

Transition (ramp) time in seconds.

Default value:

None

sensors

(map)(Optional)

List of your sensors.

name

(string)(Required)

Name of the sensor.

address

(string)(Required)

Address of the module/group.

source

(string)(Required)

Sensor source (VARIABLE, SETPOINT, THRESHOLD, S0_INPUT, LED_PORT, LOGICOP_PORT).

unit_of_measurement

(string)(Optional)

Measurement unit (VAR_UNIT).

Default value:

native

switches

(map)(Optional)

List of your switches.

name

(string)(Required)

Name of the switch.

address

(string)(Required)

Address of the module/group.

output

(string)(Required)

Switch source (OUTPUT_PORT, RELAY_PORT).

LCN Addresses

LCN hardware devices connected to the LCN bus are called modules. LCN modules are addressed by their numeric id in the range (5..254).

Modules can be arranged in segments. Segments can be addressed by their numeric id (5..128) or 0 (= no segment exist) or 3 (= target all segments).

LCN Modules within the same segment can be grouped by their group id (5..254) or 3 (= target all groups.)

The LCN integration allows the connection to more than one hardware coupler. In this case, it has to be specified which hardware coupler should be used for addressing the specified module.

Whenever the address of a module or a group has to be specified, it can be addressed using one of the following syntaxes:

Example for modules:

connid.s000.m007
connid.s0.m7
s0.m7
0.7

Example for groups:

connid.s000.g007
connid.s0.g7
s0.g7
0.g7

Leading zeroes in the segment id or module/group id can be omitted. If the connection_id is omitted, the first connection defined in the configuration will be used.

LCN Constants

The platforms and service calls use several predefined constants as parameters.

Ports

Constant Values
OUTPUT_PORT output1, output2, output3, output4
RELAY_PORT relay1, relay2, relay3, relay4, relay5, relay6, relay7, relay8
MOTOR_PORT motor1, motor2, motor3, motor4, outputs
LED_PORT led1, led2, led3, led4, led5, led6, led7, led8, led9, led10, led11, led12
LOGICOP_PORT logicop1, logicop2, logicop3, logicop4
BINSENSOR_PORT binsensor1, binsensor2, binsensor3, binsensor4, binsensor5, binsensor6, binsensor7, binsensor8

The MOTOR_PORT values specify which hardware relay or outputs configuration will be used:

Motor Relay on/off Relay up/down
motor1 relay1 relay2
motor2 relay3 relay4
motor3 relay5 relay6
motor4 relay7 relay8
Motor Output up Output down
outputs output1 output2

Variables and Units

Constant Values
VARIABLE var1, var2, var3, var4, var5, var6, var7, var8, var9, var10, var11, var12, tvar, r1var, r2var
SETPOINT r1varsetpoint, r2varsetpoint
THRESHOLD thrs1, thrs2, thrs3, thrs4, thrs5, thrs2_1, thrs2_2, thrs2_3, thrs2_4, thrs3_1, thrs3_2, thrs3_3, thrs3_4, thrs4_1, thrs4_2, thrs4_3, thrs4_4
S0_INPUT s0input1, s0input2, s0input3, s0input4
VAR_UNIT native, °C, °K, °F, lux_t, lux_i, m/s, %, ppm, volt, ampere, degree
TIME_UNIT seconds, minutes, hours, days
RELVARREF current, prog
REVERSE_TIME rt70, rt600, rt1200

States:

Constant Values
LED_STATE on, off, blink, flicker
LOGICOP_STATE not, or, and
KEY_STATE hit, make, break, dontsend

Keys:

Whenever a key has to be provided, it is defined by a joint string consisting of the table identifier (a, b, c, d) and the corresponding key number. Examples: a1, a5, d8.

Platforms

Binary Sensor

The lcn binary sensor platform allows the monitoring of the following LCN binary data sources:

  • Binary hardware sensors
  • Lock state of regulator setpoints
  • Lock state of keys

The binary sensor can be used in automation scripts or in conjunction with template platforms.

Climate

The lcn climate platform allows the control of the LCN climate regulators. This platform depends on the correct configuration of the module’s regulators, which has to be done in the LCN-PRO programming software. You need to specify at least the variable for the current temperature and a setpoint variable for the target temperature. If the control is set lockable, the regulator can be turned on/off.

If you intend to leave the regulation to Home Assistant, you should consider using the Generic Thermostat in conjunction with LCN Sensor and LCN Switch.

Cover

The lcn cover platform allows the control of LCN relays and output ports which have been configured as motor controllers.

Only for the module with firmware earlier than 190C:
The configuration allows the optional definition of reverse time. This is the time which is waited during the switching of the motor currents. The reverse time should only be defined when using the MOTOR_PORT value OUTPUTS. For all other configuration, the reverse time has to be defined in the LCN Pro software. For the reverse time, you may choose one of the following constants: RT70 (70ms), RT600 (600ms), RT1200 (1,2s).

If you are using the module's output ports for motor control, ensure that you have configured the output ports as motor controllers in the LCN Pro software! Otherwise, the output ports are not mutually interlocked and you run the risk of destroying the motor.

Light

The lcn light platform allows the control of the following LCN ports:

  • (Dimmable) output ports
  • Relays

Scene

The lcn scene platform allows the activation of previously programmed LCN scenes.

Sensor

The lcn sensor platform allows the monitoring of the following LCN data sources:

  • Variables
  • Regulator setpoints
  • Thresholds
  • S0 inputs
  • LED states
  • Logic operation states

The sensor can be used in automation scripts or in conjunction with template platforms.

Ensure that the LCN module is configured properly to provide the requested value. Otherwise, the module might show unexpected behavior or return error messages.

Switch

The lcn switch platform allows the control of the following LCN ports:

  • Output ports
  • Relays

Services

In order to directly interact with the LCN system, and invoke commands which are not covered by the implemented platforms, the following service calls can be used. Refer to the (Services Calls)[/docs/scripts/service-calls] page for examples on how to use them.

Service output_abs

Set absolute brightness of output port in percent.

Service data attribute Optional Description Values
address No LCN address
output No Output port of module OUTPUT_PORT
brightness Yes Absolute brightness in percent 0..100
transition Yes Transition (ramp) time in seconds 0..486

Example:

service: output_abs
data:
  address: myhome.0.7
  output: output1
  brightness: 100
  transition: 0

Service output_rel

Set relative brightness of output port in percent.

Service data attribute Optional Description Values
address No LCN address
output No Output port of module OUTPUT_PORT
brightness Yes Relative brightness in percent -100..100
transition Yes Transition (ramp) time in seconds 0..486

Example:

service: output_rel
data:
  address: myhome.0.7
  output: output1
  brightness: 30

Service output_toggle

Toggle output port.

Service data attribute Optional Description Values
address No LCN address
output No Output port of module OUTPUT_PORT
transition Yes Transition (ramp) time in seconds 0..486

Example:

service: output_toggle
data:
  address: myhome.0.7
  output: output1
  transition: 0

Service relays

Set the relays status. The relays states are defined as a string with eight characters. Each character represents the state change of a relay (1=on, 0=off, t=toggle, -=nochange).

Example states: t---001-

Service data attribute Optional Description Values
address No LCN address
state No Relay states as string

Example:

service: relays
data:
  address: myhome.0.7
  state: t---001-

Service led

Set the led status.

Service data attribute Optional Description Values
address No LCN address
state No Led state as string LED_STATE

Example:

service: led
data:
  address: myhome.0.7
  led: led6
  state: blink

Service var_abs

Set the absolute value of a variable or setpoint. If value is not defined, it is assumed to be 0. If unit_of_measurement is not defined, it is assumed to be native.

Service data attribute Optional Description Values
address No LCN address
variable No Variable name VARIABLE, SETPOINT
value Yes Variable value any positive number
unit_of_measurement Yes Variable unit VAR_UNIT

Example:

service: var_abs
data:
  address: myhome.0.7
  variable: var1
  value: 75
  unit_of_measurement: %
Ensure that the LCN module is configured properly to provide acces to the defined variable. Otherwise the module might show unexpected behaviors or return error messages.

Service var_rel

Set the relative value of a variable or setpoint. If value is not defined, it is assumed to be 0. If unit_of_measurement is not defined, it is assumed to be native.

Service data attribute Optional Description Values
address No LCN address
variable No Variable name VARIABLE, SETPOINT, THRESHOLD
value Yes Variable value any positive or negative number
unit_of_measurement Yes Variable unit VAR_UNIT

Example:

service: var_rel
data:
  address: myhome.0.7
  variable: var1
  value: 10
  unit_of_measurement: %
Ensure that the LCN module is configured properly to provide access to the defined variable. Otherwise the module might show unexpected behavior or return error messages.

Service var_reset

Reset value of variable or setpoint.

Service data attribute Optional Description Values
address No LCN address
variable No Variable name VARIABLE, SETPOINT

Example:

service: var_reset:
data:
  address: myhome.0.7
  variable: var1
Ensure that the LCN module is configured properly to provide access to the defined variable. Otherwise the module might show unexpected behavior or return error messages.

Service lock_regulator

Locks a regulator setpoint. If state is not defined, it is assumed to be False.

Service data attribute Optional Description Values
address No LCN address
setpoint No Setpoint name SETPOINT
state Yes Lock state true, false

Example:

service: lock_regulator
data:
  address: myhome.0.7
  setpoint: r1varsetpoint
  state: true

Service send_keys

Send keys (which executes bound commands). The keys attribute is a string with one or more key identifiers. Example: a1a5d8 If state is not defined, it is assumed to be hit. The command allows the sending of keys immediately or deferred. For a deferred sending the attributes time and time_unit have to be specified. For deferred sending, the only key state allowed is hit. If time_unit is not defined, it is assumed to be seconds.

Service data attribute Optional Description Values
address No LCN address
keys No Keys string
state Yes Keys state KEY_STATE
time Yes Deferred time 0..
time_unit Yes Time unit TIME_UNIT

Examples:

Send keys immediately:

service: send_keys
data:
  address: myhome.0.7
  keys: a1a5d8
  state: hit

Send keys deferred:

service: send_keys
data:
  address: myhome.0.7
  keys: a1a5d8
  time: 5
  time_unit: s

Service lock_keys

Locks keys. If the table is not defined, it is assumed to be table a. The key lock states are defined as a string with eight characters. Each character represents the state change of a key lock (1=on, 0=off, t=toggle, -=nochange). The command allows the locking of keys for a specified time period. For a time period, the attributes time and time_unit have to be specified. For a time period, only table a is allowed. If time_unit is not defined, it is assumed to be seconds.

Service data attribute Optional Description Values
address No LCN address
table Yes Table with keys to lock
state No Key lock states as string KEY_STATE
time Yes Time period to lock 0..
time_unit Yes Time unit TIME_UNIT

Examples:

Lock keys forever:

service: lock_keys
data:
  address: myhome.0.7
  table: a
  state: 1---t0--

Lock keys for a specified time period:

service: lock_keys
data:
  address: myhome.0.7
  state: 1---t0--
  time: 10
  time_unit: s

Service dyn_text

Send dynamic text to LCN-GTxD displays. The displays support four rows for text messages. Each row can be set independently and can store up to 60 characters (encoded in UTF-8).

Service data attribute Optional Description Values
address No LCN address
row No Text row 1..4
text No Text to send for the specified row

Example:

service: dyn_text
data:
  address: myhome.0.7
  row: 1
  text: "text in row 1"

Service pck

Send arbitrary PCK command. Only the command part of the PCK command has to be specified in the pck string.

Service data attribute Optional Description Values
address No LCN address
pck No PCK command

Example:

service: pck
data:
  address: myhome.0.7
  pck: PIN4