esphome-docs/components/display/st7567.rst
2023-12-27 12:04:14 +11:00

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ST7567 LCD Graphic Display
==========================
.. seo::
:description: Instructions for setting up ST7567 Mono STN-LCD display drivers.
:image: st7567.jpg
.. _st7567:
Usage
-----
The ``st7567`` display platform allows you to use wide range of 128x64 display modules based on
Sitronix ST7567 chipset family (ST7567A, ST7567S, ST7567G, etc.) (`datasheet <https://github.com/latonita/datasheets-storage/blob/main/lcd-modules/ST7567A_V1.2b.pdf>`__,
`Sitronix <https://www.sitronix.com.tw/en/products/industrial-display-driver-ic/mono-stn-lcd-driver-ic/>`__,
`Aliexpress <https://www.aliexpress.com/af/st7567s.html>`__) with ESPHome.
Note that this component is for displays that are connected via the :ref:`I²C Bus <i2c>` (see :ref:`st7567-i2c`)
or 3-Wire or 4-Wire :ref:`SPI bus <spi>` (see :ref:`st7567-spi`).
It's a monochrome LCD graphic display.
.. figure:: images/st7567-full.jpg
:align: center
:width: 75.0%
ST7567A based LCD Graphic Display (I²C)
.. note::
**Voltage:** Check your module specs for required power. Most of the modules are tolerant to range of voltages from 3.3V to 5V, but some might require either 5V or 3.3V.
**Electrical interference:** To reduce malfunction caused by noise, datasheet recommends to "use the refresh sequence regularly in a specified interval".
Noone knows what exact interval is - it varies based on your electrical environment - some might need it every hour, for example.
Without doing refresh sequence picture on LCD might get glitchy after some time.
You can plan refresh by using ``interval:`` section and calling ``request_refresh()`` function, after that it will perform display
refresh sequence on next component update.
.. _st7567-i2c:
Over I²C
--------
Connect ``SDA`` and ``SCL`` pins on a module to pins you chose for the :ref:`I²C Bus <i2c>`.
If your display module has ``RESET`` pin you may optionally connect it to a pin on the
ESP which may improve reliability. For power, connect ``VCC`` to 3.3V and ``GND`` to ``GND``.
.. code-block:: yaml
# Example minimal configuration entry
i2c:
sda: D1
scl: D2
display:
- platform: st7567_i2c
id: my_display
lambda: |-
it.print(0, 0, id(my_font), "Hello World!");
interval:
- interval: 1h
then:
- lambda: id(my_display).request_refresh();
Configuration variables:
************************
- **address** (*Optional*, int): Manually specify the :ref:`I²C <i2c>` address of the display. Defaults to 0x3F.
- **i2c_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`I²C Component <i2c>` if you want
to use multiple I²C buses.
- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The RESET pin. Defaults to not connected.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
- **update_interval** (*Optional*, :ref:`config-time`): The interval to re-draw the screen. Defaults to ``1s``.
- **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the display.
- **invert_colors** (*Optional*, boolean): Display hardware color invesion. Defaults to ``false``.
- **rotation** (*Optional*): Set the rotation of the display. Everything you draw in ``lambda:`` will be rotated
by this option. One of ```` (default), ``90°``, ``180°``, ``270°``.
- **transform** (*Optional*): Transform the display presentation using hardware. All defaults are ``false``.
- **mirror_x** (*Optional*, boolean): If true, mirror the physical X axis.
- **mirror_y** (*Optional*, boolean): If true, mirror the physical Y axis.
**Speeding up the bus:** To speed up the display update process you can select higher I²C frequencies, for example:
.. code-block:: yaml
# Example increased I²C bus speed
i2c:
sda: D1
scl: D2
frequency: 400kHz
**Hardware rotation:** 180 degree rotation can be implemented in hardware as in the following example:
.. code-block:: yaml
# Example using transform section to achieve 180° rotation using hardware
display:
- platform: st7567_i2c
id: my_display
transform:
mirror_x: true
mirror_y: true
lambda: |-
it.print(0, 0, id(my_font), "Hello World!");
.. _st7567-spi:
Over SPI
--------
Connect ``D0`` to the ``CLK`` pin you chose for the :ref:`SPI bus <spi>`, connect ``D1`` to the ``MOSI`` pin and ``DC`` and ``CS``
to some GPIO pins on the ESP. For power, connect ``VCC`` to 3.3V and ``GND`` to ``GND``.
Optionally you can also connect the ``RESET`` pin to a pin on the ESP which may improve reliability.
.. code-block:: yaml
# Example minimal configuration entry
spi:
clk_pin: D1
mosi_pin: D2
display:
- platform: st7567_spi
id: my_display
dc_pin: D3
lambda: |-
it.print(0, 0, id(my_font), "Hello World!");
interval:
- interval: 1h
then:
- lambda: id(my_display).request_refresh();
Configuration variables:
************************
- **dc_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The DC pin.
- **cs_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The Chip Select (CS) pin.
- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The RESET pin. Defaults to not connected.
- **spi_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`SPI Component <spi>` if you want
to use multiple SPI buses.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
- **update_interval** (*Optional*, :ref:`config-time`): The interval to re-draw the screen. Defaults to ``1s``.
- **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the display.
- **invert_colors** (*Optional*, boolean): Display hardware color invesion. Defaults to ``false``.
- **rotation** (*Optional*): Set the rotation of the display. Everything you draw in ``lambda:`` will be rotated
by this option. One of ```` (default), ``90°``, ``180°``, ``270°``.
- **transform** (*Optional*): Transform the display presentation using hardware. All defaults are ``false``.
- **mirror_x** (*Optional*, boolean): If true, mirror the physical X axis.
- **mirror_y** (*Optional*, boolean): If true, mirror the physical Y axis.
**Hardware rotation:** 180 degree rotation can be implemented in hardware as in the following example:
.. code-block:: yaml
# Example using transform section to achieve 180° rotation using hardware
display:
- platform: st7567_spi
id: my_display
dc_pin: D3
transform:
mirror_x: true
mirror_y: true
lambda: |-
it.print(0, 0, id(my_font), "Hello World!");
See Also
--------
- :doc:`index`
- :ref:`display-engine`
- :ref:`Display Menu <display_menu>`
- :ref:`i2c`
- :ref:`spi`
- :apiref:`st7567/st7567.h`
- :ghedit:`Edit`