Problems updating text on lvgl button

ESPHome
1

I have a tft screen set up using LVGL. I have a label where I want to display the current temperature. I get the temp from HA using a sensor: I have tried many things to get the lvgl.label.update to take the temp but I just get errors or the wrong value.
here is what i have
on_click:

  • lvgl.label.update:
    id: display_temperature
    text:
    format: “%.1f °C”
    args: [ ‘id(current_temperature).state’ ]
    any help would be appreciated!
2
  1. Format your YAML correctly - see How to help us help you - or How to ask a good question in particular #11.
  2. Saying “I get errors” isn’t useful. What do the errors say?
  3. Similarly “the wrong value” isn’t informative - what value did you get and what were you expecting?
  4. Show all the relevant bits of YAML in particular where the sensor is defined.
3 
sensor:
  - platform: homeassistant
    id: current_temperature
    entity_id: sensor.home_ist
    internal: true
    on_value:
      - lvgl.label.update:
          id: display_temperature
          text: 
            format: "%.1f °C"
            args: [ 'id(current_temperature)' ]

lvgl:
  displays:
    - cyd
  touchscreens:
    - touch
  buffer_size: 25%
  color_depth: 16
  bg_color: red
  pad_all: 0
  border_width: 0
  border_color: ha_blue
  outline_width: 0
  shadow_width: 0
  text_font: roboto40 
  align: center
  style_definitions:
    - id: default_style      # choose an ID for your definition
      bg_color: 0x010101  #black
      text_color: 0xffffff  #white
      align: CENTER
      text_align: CENTER
    - id: red_style      # choose an ID for your definition
      bg_color: 0x000000  #black
      text_color: 0xff0000 #red
      align: CENTER
      text_align: CENTER




  pages:
    - id: main_page
      pad_all: 0
      
      widgets:
        - obj:
            styles: default_style
            align: CENTER
            width: 480
            height: 320
            layout:
              type: GRID
              grid_columns: [fr(25),fr(50),fr(25)]
              grid_rows: [fr(7),fr(29),fr(7),fr(25),fr(7),fr(25)]
            widgets:
              - label:
                  grid_cell_row_pos: 0
                  grid_cell_column_pos: 1
                  grid_cell_x_align: STRETCH
                  grid_cell_y_align: STRETCH
                  border_width: 1
                  border_color: 0xffffff
                  text: "Target Temperature"
                  text_font: roboto10
                  text_align: CENTER

              - button:
                  styles: red_style
                  id: temp_up
                  border_width: 1
                  border_color: 0xffffff
                  grid_cell_row_pos: 1
                  grid_cell_column_pos: 0
                  grid_cell_x_align: STRETCH
                  grid_cell_y_align: CENTER
                  widgets:
                    - label:
                        text: "\U0000F379" # temp up
                        text_font: icon_font_34
                  on_click:
                    - lvgl.label.update:
                        id: display_temperature
                        text: 
                          format: "%.1f °C"
                          args: [ 'id(current_temperature).state' ] 
                             
                          




              - label:
                  text: "--.- °C"
                  id: display_temperature
                  text_font: roboto40
                  text_align: CENTER
                  grid_cell_row_pos: 1
                  grid_cell_column_pos: 1
                  grid_cell_x_align: STRETCH
                  grid_cell_y_align: STRETCH
                  border_width: 1
                  border_color: 0xffffff
 
              - button:
                  id: temp_down
                  grid_cell_row_pos: 1
                  grid_cell_column_pos: 2
                  grid_cell_x_align: STRETCH
                  grid_cell_y_align: CENTER
                  border_width: 1
                  border_color: 0xffffff
                  widgets:
                    - label:
                        text: "\U0000F37a" # temp down
                        text_font: icon_font_34
                        text_align: CENTER
                        text_color: 0x0000ff
                  on_click:
                    - lvgl.label.update:
                        id: display_temperature
                        text:                           
                          format: "%.1f °F"
                          args: [ 'id(current_temperature)' ]  [quote="cormiersa, post:1, topic:823830, full:true"]
I have a tft screen set up using LVGL. I have a label where I want to display the current temperature. I get the temp from HA using a sensor:  I have tried many things to get the lvgl.label.update to take the temp but I just get errors or the wrong value.
here is what i have 
on_click:
  - lvgl.label.update:
       id: display_temperature
       text: 
          format: "%.1f °C"
          args: [ 'id(current_temperature).state' ]
any help would be appreciated!
[/quote]
4

So the error is what is displayed. I expected “20.5 °C” but when it first resets I get two empty squars a dot and one empty square and °C. basically " . °C" then on temp_up button push I get “nan °C” and on temp_down button push I get “1.8 °F”. buttons were set up to test different args: to find the correct one.