Advanced Uses & Automations (v0.9.x)

[!NOTE] Advanced automations, OpenWebNet events, custom message sending, and hardware bus timers.

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Events

CEN / CEN+ Scenario Pushbutton Events

A powerful feature is assigning CEN or CEN+ commands to physical wall switches and using the generated bus events in Home Assistant to trigger automations. CEN/CEN+ switches do not require explicit entity configuration in Home Assistant; all received messages dispatch bus events automatically.

alias: "Trigger Scene from CEN+ Wall Switch"
trigger:
  - platform: event
    event_type: myhome_cenplus_event
    event_data:
      event: pushbutton_short_press
      object: 33
      pushbutton: 7
action:
  - action: light.toggle
    target:
      entity_id: light.living_room

alias: "Trigger Scene from CEN Wall Switch"
trigger:
  - platform: event
    event_type: myhome_cen_event
    event_data:
      event: pushbutton_long_release
      object: 10
      pushbutton: 1
action:
  - action: media_player.media_play_pause
    target:
      entity_id: media_player.sonos_living_room

• CEN Events:
• pushbutton_short_press
• pushbutton_short_release
• pushbutton_long_press
• pushbutton_long_release
• CEN+ Events:
• pushbutton_short_press
• pushbutton_long_press
• pushbutton_long_release

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Bus Broadcast Events

When group, area, or general commands occur on the physical bus, the integration dispatches corresponding Home Assistant events:

Light Events

• myhome_general_light_event
• myhome_area_light_event
• myhome_group_light_event

Attributes: - event: 'on' or 'off' - area: Area number (for area events) - group: Group ID (for group events, without leading #) - message: Full raw OpenWebNet frame

Example: Synchronizing a Home Assistant Light Group with an SCS group button:

alias: "Sync MyHOME Group 1 Wall Switch"
trigger:
  - platform: event
    event_type: myhome_group_light_event
    event_data:
      group: 1
action:
  - action: light.turn_{{ trigger.event.data.event }}
    target:
      entity_id: light.living_room_group

Automation (Cover) Events

• myhome_general_automation_event
• myhome_area_automation_event
• myhome_group_automation_event

Attributes: - event: 'open', 'close', or 'stop' - area: Area number - group: Group ID

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Services

Instant Power Sampling (myhome.start_sending_instant_power)

WHO 18 power meters only report live power when explicitly polled for a set window (up to 255 minutes). You can create an automation running periodically:

action: myhome.start_sending_instant_power
data:
  duration: 120
  entity_id: sensor.general_power

Gateway Time Synchronization (myhome.sync_time)

Writes the Home Assistant system clock to the gateway's real-time clock:

action: myhome.sync_time
data: {}

Raw OpenWebNet Command Injection (myhome.send_message)

Send arbitrary OpenWebNet frames directly to the SCS bus:

action: myhome.send_message
data:
  message: "*1*0*0##"  # General Off for all lights

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⏱️ Native Bus Timers (Temporized Lights)

When automating lights that should turn off automatically after a set duration (corridors, staircases, pantries), software delays in Home Assistant risk leaving lights on if Home Assistant restarts.

The BTicino / Legrand MyHOME bus features actuator-level hardware timers (WHO = 1): the physical relay executes the countdown internally on the SCS bus.

1. Pre-set Timers (WHAT = 11..18)

WHAT Code	Duration	Frame Syntax	Typical Application
18	0.5 s	*1*18*<WHERE>##	Door buzzer pulse, gate trigger
17	30 s	*1*17*<WHERE>##	Entrance courtesy light
11	1 min	*1*11*<WHERE>##	Pantry, walk-through hallway
12	2 min	*1*12*<WHERE>##	Staircase landing
13	3 min	*1*13*<WHERE>##	Garage entrance
14	4 min	*1*14*<WHERE>##	Storage room
15	5 min	*1*15*<WHERE>##	Garden walkway
16	15 min	*1*16*<WHERE>##	Utility room, carport

action: myhome.send_message
data:
  message: "*1*13*21##"  # Turn light 21 on for 3 minutes

2. Custom Duration Timers (Dimension 2)

*#1*<WHERE>*#2*<HOURS>*<MINUTES>*<SECONDS>##

# Turn light 21 ON for 20 minutes:
action: myhome.send_message
data:
  message: "*#1*21*#2*0*20*0##"