Issues with getting LGVL widet updates with homeassistant values

ESPHome
1

Hi i am working on my first real LGVL ESPHome project and i am stuck already in the beginning.

so display is working and showing widgets like i should, but i can not get it to display values from homeassistant :confused:

my Widget:

lvgl:
  pages:
    - id: main_page # Default page
      widgets:
        - label:
            id: text_label
            align: CENTER
            x: 0
            y: 0
            text: "Label Text"

and here the update code

sensor:
  - platform: homeassistant
    id: gw2000a_outdoor_temperature
    name: "Ambient Temp"
    entity_id: sensor.gw2000a_outdoor_temperature 
    on_value:
      - lvgl.label.update:
          id: text_label
          text:
            format: "Outdoor Temp: %.1f°C" 
            args: [ 'id(gw2000a_outdoor_temperature).state' ]

just a small exampe to show temp, but for some reason it does not update :confused:

2 
I have this working fine... in my case I update the color based on temp.. I'm sure there is a simpler way of doing it but this works for me :-)

    on_value:
      - if:
          condition:
            lambda: |-
              return x > 30;
          then:
            - lvgl.label.update:
                id: lbl_outside_temp
                text:
                  format: "%.0f°c"
                  args: [ 'x' ]
                text_color: 0xFF0000

      - if:
          condition:
            lambda: |-
              return x <= 30;
          then:
            - lvgl.label.update:
                id: lbl_outside_temp
                text:
                  format: "%.0f°c"
                  args: [ 'x' ]
                text_color: 0xFF8000
3

here is my entire config, for some reason i dont get it to work:

esphome:
  name: pooltechnik
  friendly_name: PoolTechnik
  platformio_options: 
    build_flags: "-DBOARD_HAS_PSRAM"
    board_build.esp-idf.memory_type: qio_opi
    board_build.flash_mode: dio
  on_boot:
    then:
      - pcf85063.read_time:

esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: esp-idf
    sdkconfig_options:
      CONFIG_FREERTOS_HZ: "1000"
      CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240: y
      CONFIG_SPIRAM_SPEED_120M: y
      CONFIG_SPIRAM_FETCH_INSTRUCTIONS: y
      CONFIG_SPIRAM_RODATA: y
      CONFIG_ESP32S3_DATA_CACHE_64KB: y
      CONFIG_COMPILER_OPTIMIZATION_PERF: y

# Enable logging
logger:
  baud_rate: 0

# Enable Home Assistant API
api:
  encryption:
    key: !secret api_key

ota:
  - platform: esphome
    password: !secret ota_password

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Pooltechnik Fallback Hotspot"
    password: !secret fallback_password

captive_portal:

sensor:
  - platform: homeassistant
    id: gw2000a_outdoor_temperature
    name: "Ambient Temp"
    entity_id: sensor.gw2000a_outdoor_temperature 
    on_value:
      - lvgl.label.update:
          id: text_label
          text:
            format: "Outdoor Temp: %.1f°C" # Format string (e.g., one decimal place)
            args: [ 'id(gw2000a_outdoor_temperature).state' ] # Directly reference the sensor's state
      - lvgl.widget.redraw:
          lvgl_id: lvgl_1

i2c:
  sda: GPIO8
  scl: GPIO9
  scan: true
  id: bus_a

uart:
  id: mbuart
  tx_pin: GPIO44
  rx_pin: GPIO43
  baud_rate: 9600
  stop_bits: 1

time:
  - platform: pcf85063
    id: pcf85063_time
    address: 0x51
    update_interval: never
  - platform: homeassistant
    on_time_sync:
      then:
        pcf85063.write_time:

modbus:
  id: modbus1
  uart_id: mbuart

modbus_controller:
  - id: vfdFilter
    address: 1
    modbus_id: modbus1
    update_interval: 1000ms

psram:
  mode: octal
  speed: 80MHz

touchscreen:
  platform: gt911
  id: main_touch
  interrupt_pin: GPIO4

display:
  - platform: rpi_dpi_rgb
    id: main_display
    color_order: RGB
    pclk_frequency: 16MHz
    dimensions:
      width: 800
      height: 480
    de_pin:
      number: 5
    hsync_pin:
      number: 46
      ignore_strapping_warning: true
    vsync_pin:
      number: 3
      ignore_strapping_warning: true
    pclk_pin: 7
    hsync_back_porch: 30
    hsync_front_porch: 210
    hsync_pulse_width: 30
    vsync_back_porch: 4
    vsync_front_porch: 4
    vsync_pulse_width: 4
    data_pins:
      red:
        - 1         #r3
        - 2         #r4
        - 42        #r5
        - 41        #r6
        - 40        #r7
      blue:
        - 14        #b3
        - 38        #b4
        - 18        #b5
        - 17        #b6
        - 10        #b7
      green:
        - 39        #g2
        - 0         #g3
        - 45        #g4
        - 48        #g5
        - 47        #g6
        - 21        #g7
    auto_clear_enabled: false
    show_test_card: false
    update_interval: never

lvgl:
  - id: lvgl_1
    displays: main_display
    pages:
      - id: main_page # Default page
        widgets:
          - label:
              id: text_label
              align: CENTER
              x: 0
              y: 0
              text: "Label Text"
4

Best practice where you are referencing the value of a sensor within that sensor block is to use ‘x’, like Andy has.

You could also try:

    on_value:
      - lvgl.label.update:
          id: text_label
          text:
            format: "Outdoor Temp: %.1f°C" # Format string
            args: [ 'id(gw2000a_outdoor_temperature).get_state()' ]

I believe this is something to do with the way the printf statement is referenced…

5

okay thank you, i thought this ‘x’ is just example code not that it is really directly referring to the sensor value.

i change it, but bad news is, still no update :confused: still always shows “Label Text”

6

Ok - what do the logs say - is the sensor actually getting updated?

7

Thanks i was idiotic, i did not activate the API in the settings of the device in homeassistant, i thought its active as soon as i add the api: section into the esphome config

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