Combine two command_topics in MQTT switch for Sonoff RF Bridge

Configuration
1

I managed to run Tasmota on an Sonoff RF Bridge and have a basic 433Mhz plug configured to turn on and off using 2 ‘keys’ in the Tasmota configuration.

To activate the plug, I use the following topic:

cmnd/ground_floor_rf_bridge/RfKey1

To disable the plug, I use another topic:

cmnd/ground_floor_rf_bridge/RfKey2

Both use an empty payload. Is there a way to combine these two topics into a single command_topic for an MQTT Switch or another way to achieve this?

The Sonoff RF Bridge in total supports 16 keys to learn.

1 Like
2

After some searching and tinkering I came up with the following solution:

Create an input_boolean to act as the switch

christmas_tree_lights_switch:
  name: Christmas Tree Lights Switch
  initial: off
  icon: mdi:pine-tree

Create an automation with a data_templateto decide which topic to use

#########################################
# Publish switch change via MQTT to RF #
#########################################
- id: mqtt_publish_switch_rf
  alias: Publish switch change via MQTT to RF
  initial_state: "on"
  trigger:
    - platform: state
      entity_id: input_boolean.christmas_tree_lights_switch
  action:
    - service: mqtt.publish
      data_template:
        topic: >
          {%- if trigger.entity_id == "input_boolean.christmas_tree_lights_switch" and states.input_boolean.christmas_tree_lights_switch.state == "on" -%}
                  cmnd/ground_floor_rf_bridge/RfKey1
          {%- elif trigger.entity_id == "input_boolean.christmas_tree_lights_switch" and states.input_boolean.christmas_tree_lights_switch.state == "off" -%}
                  cmnd/ground_floor_rf_bridge/RfKey2
          {% endif %}
        payload: ''

The automation checks the trigger.entity_id in order to be able to extend it for multiple input_boolean switches instead of creating multiple automations for it.

Another possible solution I found was using a command_line switch as mentioned in the following posting, but I wanted to try to use only functionalitiy offered by Home Assistant:

1 Like
3

Thank you very much from the future!