ST7789V TFT LCD =============== .. seo:: :description: Instructions for setting up ST7789V TFT LCD display drivers. :image: st7789v.jpg .. _st7789v: Usage ----- The ``st7789v`` display platform allows you to use ST7789V (`datasheet `__, `Tindie `__) displays with ESPHome. Note that this component utilizes the 4-Wire :ref:`SPI bus `; the physical connection is already in place on the TTGO T-Display module as shown below. .. figure:: images/st7789v-full.jpg :align: center :width: 75.0% ST7789V TFT LCD on TTGO T-Display module This module has a USB-C connector with an on-board serial adapter for programming. Simply connect to a USB-C port to get started! (Depending on your operating system of choice, you might need to install an appropriate driver.) It is also possible to power the module via the 5V and G (ground) pins along the edges of the module, or via a battery attached to the connector on the bottom of the board. The ESP32's UART pins are not brought out to the headers, so the on-board serial adapter must be used for hardwired programming. (OTA updates are of course possible after ESPHome is initially installed.) .. code-block:: yaml # Example minimal configuration entry spi: clk_pin: GPIO18 mosi_pin: GPIO19 display: - platform: st7789v backlight_pin: GPIO4 cs_pin: GPIO5 dc_pin: GPIO16 reset_pin: GPIO23 lambda: |- it.print(0, 0, id(font), "Hello World!"); .. warning:: When using the TTGO T-Display module, the GPIO pin numbers above *cannot be changed* as they are hardwired within the module/PCB. Configuration variables: ************************ - **cs_pin** (**Required**, :ref:`Pin Schema `): The CS pin. - **dc_pin** (**Required**, :ref:`Pin Schema `): The DC pin. - **reset_pin** (**Required**, :ref:`Pin Schema `): The RESET pin. - **backlight_pin** (*Optional*, :ref:`Pin Schema `): The display's backlight pin. - **lambda** (*Optional*, :ref:`lambda `): The lambda to use for rendering the content on the display. See :ref:`display-engine` for more information. - **update_interval** (*Optional*, :ref:`config-time`): The interval to re-draw the screen. Defaults to ``5s``. - **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`. - **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation. Configuration examples ********************** As of version 1.15, ESPHome supports color displays. To utilize the color capabilities of this display module, you'll likely want to add a ``color:`` section to your YAML configuration; please see :ref:`color ` for more detail on this configuration section. To use colors in your lambda: .. code-block:: yaml color: - id: my_red red: 100% green: 3% blue: 5% ... display: ... lambda: |- it.rectangle(0, 0, it.get_width(), it.get_height(), id(my_red)); To bring in color images: .. code-block:: yaml image: - file: "image.jpg" id: my_image resize: 200x200 type: RGB24 ... display: ... lambda: |- it.image(0, 0, id(my_image)); Complete example **************** The following is a complete example YAML configuration that does a few things beyond the usual Wi-Fi, API, and OTA configuration. It defines: - three fonts (well, one font in three sizes) - a ``binary_sensor`` that indicates the state of connectivity to the API - a ``binary_sensor`` for each of the two buttons on the TTGO module - a ``switch``, allowing control of the backlight from HA - several colors - a color image to be shown on the display - time, for display...on the display - the SPI configuration for communicating with the display - the display component itself, for use on the TTGO module - a lambda which paints the screen as shown in the picture above: - blue borders, with a sort of "title bar" along the top - "ESPHome" in yellow in the top left corner - the API connection status, "Online" in green when connected, "Offline" in red when not - the time and date, more or less in the center of the display To use this example, you need only to provide the font file, "Helvetica.ttf" (or update it to a font of your choosing) and an image file, "image.png" (it may also be a ".jpg"). Place these into the same directory as the YAML configuration file itself. Comment/Uncomment/Modify the appropriate lines of C code in the lambda to hide or show the image or text as you wish. .. code-block:: yaml esphome: name: esp_tdisplay platform: ESP32 board: featheresp32 wifi: ssid: "ssid" password: "password" # Enable fallback hotspot (captive portal) in case wifi connection fails ap: ssid: "esp_tdisplay" password: "some_password" captive_portal: # Enable logging logger: # Enable Home Assistant API api: password: "some_api_password" ota: password: "some_ota_password" color: - id: my_red red: 100% green: 0% blue: 0% - id: my_yellow red: 100% green: 100% blue: 0% - id: my_green red: 0% green: 100% blue: 0% - id: my_blue red: 0% green: 0% blue: 100% - id: my_gray red: 50% green: 50% blue: 50% font: - file: "Helvetica.ttf" id: helvetica_48 size: 48 - file: "Helvetica.ttf" id: helvetica_24 size: 24 - file: "Helvetica.ttf" id: helvetica_12 size: 12 binary_sensor: - platform: status name: "Node Status" id: system_status - platform: gpio pin: number: GPIO0 inverted: true mode: input: true pullup: true name: "T-Display Button Input 0" id: tdisplay_button_input_0 - platform: gpio pin: number: GPIO35 inverted: true name: "T-Display Button Input 1" id: tdisplay_button_input_1 # We can still control the backlight independently switch: - platform: gpio pin: GPIO4 name: "Backlight" id: backlight image: - file: "image.png" id: my_image resize: 200x200 type: RGB24 time: - platform: homeassistant id: esptime spi: clk_pin: GPIO18 mosi_pin: GPIO19 display: - platform: st7789v backlight_pin: GPIO4 cs_pin: GPIO5 dc_pin: GPIO16 reset_pin: GPIO23 rotation: 270 lambda: |- it.rectangle(0, 0, it.get_width(), it.get_height(), id(my_blue)); it.rectangle(0, 20, it.get_width(), it.get_height(), id(my_blue)); // header bar it.strftime((240 / 2), (140 / 3) * 1 + 5, id(helvetica_24), id(my_gray), TextAlign::CENTER, "%Y-%m-%d", id(esptime).now()); it.strftime((240 / 2), (140 / 3) * 2 + 5, id(helvetica_48), id(my_gray), TextAlign::CENTER, "%H:%M:%S", id(esptime).now()); it.print(5, 5, id(helvetica_12), id(my_yellow), TextAlign::TOP_LEFT, "ESPHome"); // Comment out the above lines to see the image without text overlaid // it.image(0, 0, id(my_image)); if (id(system_status).state) { it.print(235, 5, id(helvetica_12), id(my_green), TextAlign::TOP_RIGHT, "Online"); } else { it.print(235, 5, id(helvetica_12), id(my_red), TextAlign::TOP_RIGHT, "Offline"); } See Also -------- - :doc:`index` - :apiref:`st7789v_base/st7789v_base.h` - :ghedit:`Edit`