payload_template: '{{ states("sensor.multisensor_bedroom_air_temperature") | float | round(0) }}°'
Is this what you mean with ’ ’ or " "?
I was just looking at it in Template tool without the ’ or ". Good to know.
Replace state with states.
There’s no state function so the float receives nothing useful and reports a default value (zero).
Be advised that you should specify the default value to be used by float. Change it to this float(0)
Also, what is this unprintable character at the beginning of the string?
payload_template: '" {{ state("sensor.
^
|
What is this for?
I tried with states instead of state with no success
@123 it is a FontAwesome symbol being displayed on HaspOne.
I mean it works but it shows 0°
payload_template: "{{ states("sensor.multisensor_bedroom_air_temperature") | float(0) | round(0) }}°"
Have you tried it with the " " and float(0).
Do you get anything if you put
"{{ states("sensor.multisensor_bedroom_air_temperature") | float(0) | round(0) }}°"
in the Developer tools Template even?
Did you execute Reload Template Entities after making the change? (Or restart Home Assistant)
If you did, then copy-paste this into the Template Editor and let us know what it reports:
{{ state("sensor.multisensor_bedroom_air_temperature") | float(0) }}
Ok i fixed this but broke the rest of the code 
Your responses lack details so we are left wondering what you mean when you say “I fixed this” (How? What exactly did you do? Was any of it related to what has been suggested?) and “broke the code” (What other code and how is it broken?).
# - service: mqtt.publish
# data:
# topic: "hasp/displ_entrance/command/p[4].b[5].txt"
# payload_template: '" {{ states( sensor.multisensor_bedroom_air_temperature) | float | round(0) }}°"'
this is the code I have, however it broke the rest of the code (it’s very long but simple):
##############################################################################
# Automations for handling climate controls on page 4
automation:
# Set font and text labels for scene buttons on device connection
- alias: hasp_displ_entrance_p4alternative_HVACInit
trigger:
- platform: state
entity_id: "binary_sensor.displ_entrance_connected"
to: "on"
- platform: homeassistant
event: start
action:
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/json"
payload_template: >-
["p[4].b[5].font=7",
"p[4].b[7].font=7",
"p[4].b[6].font=8",
"p[4].b[8].font=8",
"p[4].b[9].font=7",
"p[4].b[11].font=7",
"p[4].b[10].font=7",
"p[4].b[12].font=7"]
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[7].txt"
payload_template: '"{{ states("climate.ac_bedroom")|replace("heat_cool","")|replace("fan_only","")|replace("dry","")|replace("cool","")|replace("heat","")|replace("off","")|title }} {{ state_attr("climate.ac_bedroom", "temperature") | int }}°"'
# - service: mqtt.publish
# data:
# topic: "hasp/displ_entrance/command/p[4].b[5].txt"
# payload_template: '" {{ states( sensor.multisensor_bedroom_air_temperature) | float | round(0) }}°"'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[6].txt"
payload_template: '""'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[8].txt"
payload_template: '""'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[11].txt"
payload_template: '" AVG."'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[9].txt"
payload_template: '" EXT."'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[10].txt"
payload_template: '"{{ state_attr("sensor.outside_average_temperature", "mean") | float | round(0) }}°"'
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[12].txt"
payload_template: '"{{ state_attr("sensor.home_average_temerpature", "mean") | float | round(0) }}°"'
- alias: hasp_displ_entrance_p4alternative_UpdateHVACMode1
trigger:
- platform: state
entity_id: "climate.bedroom"
action:
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[7].txt"
payload_template: '"{{ states("climate.ac_bedroom")|replace("heat_cool","")|replace("fan_only","")|replace("dry","")|replace("cool","")|replace("heat","")|replace("off","")|title }} {{ state_attr("climate.ac_bedroom", "temperature") | int }}°"'
# Catch either of the "mode" buttons, iterate through the list of supported modes, and
# select the next one in the list or loop back to the beginning if it's the last item
- alias: hasp_displ_entrance_p4alternative_CycleHVACMode1
trigger:
- platform: mqtt
topic: "hasp/displ_entrance/state/p[4].b[7]"
payload: "ON"
action:
- service: climate.set_hvac_mode
entity_id: "climate.ac_bedroom"
data_template:
hvac_mode: >-
{% for mode in state_attr("climate.ac_bedroom", "hvac_modes") %}
{% if mode == states("climate.ac_bedroom") %}
{% if loop.last %}
{{ state_attr("climate.ac_bedroom", "hvac_modes")[0] }}
{% else %}
{{ state_attr("climate.ac_bedroom", "hvac_modes")[loop.index] }}
{% endif %}
{% endif %}
{% endfor %}
# Display current HVAC temp on HASP when updated in Home Assistant
- alias: hasp_displ_entrance_p4alternative_UpdateHVACTemp1
trigger:
platform: state
entity_id: "climate.ac_bedroom"
condition:
condition: template
value_template: '{{ trigger.from_state and trigger.to_state.attributes.current_temperature != trigger.from_state.attributes.current_temperature }}'
action:
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[5].txt"
payload_template: '" {{ state_attr("climate.ac_bedroom", "current_temperature") | int}}°"'
# Display HVAC temp set point on HASP when updated in Home Assistant
- alias: hasp_displ_entrance_p4alternative_UpdateHVACTempHigh1
trigger:
platform: state
entity_id: "climate.ac_bedroom"
condition:
condition: template
value_template: '{{ trigger.from_state and trigger.to_state.attributes.temperature != trigger.from_state.attributes.temperature }}'
action:
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[7].txt"
payload_template: '"{{ states("climate.ac_bedroom")|replace("heat_cool","")|replace("fan_only","")|replace("dry","")|replace("cool","")|replace("heat","")|replace("off","")|title }} {{ state_attr("climate.ac_bedroom", "temperature") | int }}°"'
# Increment HVAC temp set point when p[4].b[6] is pressed
- alias: hasp_displ_entrance_p4alternative_SetHVACTempPlus1
trigger:
- platform: mqtt
topic: "hasp/displ_entrance/state/p[4].b[6]"
payload: "ON"
action:
- service: climate.set_temperature
entity_id: "climate.ac_bedroom"
data_template:
temperature: '{{ state_attr("climate.ac_bedroom", "temperature") + 1 | int}}'
# Decrement HVAC temp set point when p[4].b[8] is pressed
- alias: hasp_displ_entrance_p4alternative_SetHVACTempMinus1
trigger:
- platform: mqtt
topic: "hasp/displ_entrance/state/p[4].b[8]"
payload: "ON"
action:
- service: climate.set_temperature
entity_id: "climate.ac_bedroom"
data_template:
temperature: '{{ state_attr("climate.ac_bedroom", "temperature") - 1 | int}}'
# Turn off HVAC when p[4].b[5] is pressed
- alias: hasp_displ_entrance_p4alternative_SetHVACOff1
trigger:
- platform: mqtt
topic: "hasp/displ_entrance/state/p[4].b[5]"
payload: "ON"
action:
- service: climate.set_hvac_mode
entity_id: "climate.ac_bedroom"
data_template:
hvac_mode: "off"
I don’t recall anyone telling you to comment out the service call. You did that without telling anyone thereby making it difficult for anyone to understand how or what “broke your code”.
The lack of details and clear description of what steps you have performed make it very challenging to assist you. I suggest you review the FAQ to understand what is needed to help others help you.
Good luck.
I commented it out to make the rest of the code work. Thanks for your time anyway!
Ok, if you want to try and continue, try this. Copy the below line to the Developer Tool Template and tell me what value shows in the top right hand corner of your screen like I did for one of my sensor entities in point 4. If we go through it with smaller steps then we may understand each other.
"{{ states("sensor.multisensor_bedroom_air_temperature") | float(0) | round(0) }}°"
I see "24°"
I think I found the problem: the code is clashing with the following piece of code that I don’t know how to edit in order to make it update the temperature based on the sensor.multisensor_bedroom_air_temperature:
# Display current HVAC temp on HASP when updated in Home Assistant
- alias: hasp_displ_entrance_p4alternative_UpdateHVACTemp1
trigger:
platform: state
entity_id: "climate.ac_bedroom"
condition:
condition: template
value_template: '{{ trigger.from_state and trigger.to_state.attributes.current_temperature != trigger.from_state.attributes.current_temperature }}'
action:
- service: mqtt.publish
data:
topic: "hasp/displ_entrance/command/p[4].b[5].txt"
payload_template: '" {{ state_attr("climate.ac_bedroom", "current_temperature") | int}}°"'
That’s good. Now try this in the developer tools . Make sure you tick box just in front of payload template.
Does the new senor temp show on the haspone screen when you press call service?
Yes it worked!
The problem is: will it update automatically as it changes temperature?
Hi
Yes just a way to test you could publish the sensor state via mqtt to the device. I would suggest you open a new post specifically mentioning Haspone and what you are trying to do. It might attract more attention from the people who have Haspone experience. I don’t think I could work out what next step without a Haspone myself. Might get one in the future though if I see you were successful. 
Ok thank you very much!