WLANThermo for Home Assistant
The WLANThermo bbq thermometer (https://wlanthermo.de/) uses a local wifi and optional MQTT server to push the temperature changes to.
Setup MQTT in WLANThermo
Link your WLANThermo to the same MQTT server which Home Assistant is using. You can do this easily on the provided web interface.
Home Assistant Configuration
Sensor
First we add a sensor containing all information, battery status as master value. We force it to expire after 1 minute of no new MQTT message, which leads Home Assistant to set the status to Unknown.
Adjust your MQTT topic appropriately, so change the topic prefix WLanThermo/NANO-2a21b5 to your modelname.
sensor:
# Basic sensor, read everything from MQTT
- platform: mqtt
name: "WLANThermo"
# change topic to your modelname!
state_topic: "WLanThermo/NANO-2a21b5/status/data"
value_template: "{{ value_json.system.soc }}"
# change topic to your modelname!
json_attributes_topic: "WLanThermo/NANO-2a21b5/status/data"
json_attributes_template: "{{ value_json | tojson }}"
device_class: battery
unit_of_measurement: "%"
expire_after: 60
# Template sensor per channel
- platform: template
sensors:
# Wifi signal strength
wlanthermo_signal_strength:
value_template: "{{ state_attr('sensor.wlanthermo', 'system')['rssi'] }}"
unit_of_measurement: "dBm"
friendly_name: "WLANThermo signal strength"
device_class: signal_strength
entity_id: sensor.wlanthermo
# Channel 1
wlanthermo_channel_1_all:
value_template: "{{ state_attr('sensor.wlanthermo', 'channel')[0] }}"
entity_id: sensor.wlanthermo
wlanthermo_channel_1:
friendly_name_template: >
{% if not is_state('sensor.wlanthermo', 'unknown') %}
{{ state_attr('sensor.wlanthermo', 'channel')[0]['name'] }}
{% else %}
Channel 1
{% endif %}
# set to zero if wlanthermo is turned off or channel not plugged in
value_template: >
{% if not is_state('sensor.wlanthermo', 'unknown') %}
{% set temp = state_attr('sensor.wlanthermo', 'channel')[0]['temp'] %}
{% if temp >= -30 and temp <= 300 %}
{{ temp }}
{% else %}
0
{% endif %}
{% else %}
0
{% endif %}
unit_of_measurement: "°C"
device_class: temperature
entity_id: sensor.wlanthermo
# Channel 2
wlanthermo_channel_2_all:
value_template: "{{ state_attr('sensor.wlanthermo', 'channel')[1] }}"
entity_id: sensor.wlanthermo
wlanthermo_channel_2:
friendly_name_template: >
{% if not is_state('sensor.wlanthermo', 'unknown') %}
{{ state_attr('sensor.wlanthermo', 'channel')[1]['name'] }}
{% else %}
Channel 1
{% endif %}
# set to zero if wlanthermo is turned off or channel not plugged in
value_template: >
{% if not is_state('sensor.wlanthermo', 'unknown') %}
{% set temp = state_attr('sensor.wlanthermo', 'channel')[1]['temp'] %}
{% if temp >= -30 and temp <= 300 %}
{{ temp }}
{% else %}
0
{% endif %}
{% else %}
0
{% endif %}
unit_of_measurement: "°C"
device_class: temperature
entity_id: sensor.wlanthermo
# add further channels here...Input Number
Now we need to define input_number elements, so that we are able to control a slider in the UI.
input_number:
wlanthermo_channel_1_min:
name: Channel 1 min
min: 0
max: 100
step: 1
unit_of_measurement: °C
icon: mdi:thermometer
wlanthermo_channel_1_max:
name: Channel 1 max
min: 0
max: 150
step: 1
unit_of_measurement: °C
icon: mdi:thermometer
wlanthermo_channel_2_min:
name: Channel 2 min
min: 0
max: 100
step: 1
unit_of_measurement: °C
icon: mdi:thermometer
wlanthermo_channel_2_max:
name: Channel 2 max
min: 0
max: 150
step: 1
unit_of_measurement: °C
icon: mdi:thermometerAutomations (updating sensor values)
In the automations you have to define how to set the defined input_number elements (we want to use the values which are coming from MQTT) and what to do if someone changes the slider in the UI (we want to update the WLANThermo).
# First automation: set Home Assistant sensor value from MQTT messages, so we
# update if someone changes the values on web interface
- id: '1565774399160'
alias: WLANThermo update channels min/max from MQTT
trigger:
- entity_id: sensor.wlanthermo
platform: state
condition: []
action:
- data_template:
entity_id: input_number.wlanthermo_channel_1_min
value: '{{ state_attr(''sensor.wlanthermo'', ''channel'').0.min }}'
service: input_number.set_value
- data_template:
entity_id: input_number.wlanthermo_channel_1_max
value: '{{ state_attr(''sensor.wlanthermo'', ''channel'').0.max }}'
service: input_number.set_value
- data_template:
entity_id: input_number.wlanthermo_channel_2_min
value: '{{ state_attr(''sensor.wlanthermo'', ''channel'').1.min }}'
service: input_number.set_value
- data_template:
entity_id: input_number.wlanthermo_channel_2_max
value: '{{ state_attr(''sensor.wlanthermo'', ''channel'').1.max }}'
service: input_number.set_value
# automation per input_number: update value set in Lovelace UI on WLANThermo
- id: '1565867288673'
alias: WLANThermo set channel 1 min
trigger:
- entity_id: input_number.wlanthermo_channel_1_min
platform: state
condition: []
action:
- service: mqtt.publish
data_template:
topic: WLanThermo/NANO-2a21b5/set/channels
retain: true
payload: '{{ ''{"number":1,"min":''+states(''input_number.wlanthermo_channel_1_min'')+''}''
}}'
# automation per input_number: update value set in Lovelace UI on WLANThermo
- id: '1565867288674'
alias: WLANThermo set channel 1 max
trigger:
- entity_id: input_number.wlanthermo_channel_1_max
platform: state
condition: []
action:
- service: mqtt.publish
data_template:
topic: WLanThermo/NANO-2a21b5/set/channels
retain: true
payload: '{{ ''{"number":1,"max":''+states(''input_number.wlanthermo_channel_1_max'')+''}''
}}'
# automation per input_number: update value set in Lovelace UI on WLANThermo
- id: '1565867288675'
alias: WLANThermo set channel 2 min
trigger:
- entity_id: input_number.wlanthermo_channel_2_min
platform: state
condition: []
action:
- service: mqtt.publish
data_template:
topic: WLanThermo/NANO-2a21b5/set/channels
retain: true
payload: '{{ ''{"number":2,"min":''+states(''input_number.wlanthermo_channel_2_min'')+''}''
}}'
# automation per input_number: update value set in Lovelace UI on WLANThermo
- id: '1565867288676'
alias: WLANThermo set channel 2 max
trigger:
- entity_id: input_number.wlanthermo_channel_2_max
platform: state
condition: []
action:
- service: mqtt.publish
data_template:
topic: WLanThermo/NANO-2a21b5/set/channels
retain: true
payload: '{{ ''{"number":2,"max":''+states(''input_number.wlanthermo_channel_2_max'')+''}''
}}'
# add additional channels here...Lovelace configuration
- title: Thermometer
icon: 'mdi:pig'
cards:
- type: entities
entities:
- entity: sensor.wlanthermo
- type: history-graph
entities:
- entity: sensor.wlanthermo_channel_1
- entity: sensor.wlanthermo_channel_2
title: Temperaturverlauf
- type: conditional
conditions:
- entity: sensor.wlanthermo_channel_1
state_not: '0'
- entity: sensor.wlanthermo_channel_1
state_not: unavailable
card:
type: vertical-stack
cards:
- type: gauge
entity: sensor.wlanthermo_channel_1
min: 0
max: 250
severity:
green: 90
yellow: 115
red: 200
- type: entities
entities:
- entity: input_number.wlanthermo_channel_1_min
- entity: input_number.wlanthermo_channel_1_max
- type: conditional
conditions:
- entity: sensor.wlanthermo_channel_2
state_not: '0'
- entity: sensor.wlanthermo_channel_2
state_not: unavailable
card:
type: vertical-stack
cards:
- type: gauge
entity: sensor.wlanthermo_channel_2
min: 0
max: 100
severity:
green: 0
yellow: 0
red: 0
- type: entities
entities:
- entity: input_number.wlanthermo_channel_2_min
- entity: input_number.wlanthermo_channel_2_max