esphome-docs/components/touchscreen/tt21100.rst

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TT21100 Touch Screen Controller
===============================
.. seo::
:description: Instructions for setting up TT21100 touch screen controller with ESPHome
:image: esp32-s3-korvo-2-lcd.png
:keywords: TT21100, ESP32-S3-BOX, ESP32-S3-Korvo-2-LCD
The ``tt21100`` touchscreen platform allows using the touch screen controllers based on the TT21100 chip with ESPHome.
The :ref:`I²C <i2c>` is required to be set up in your configuration for this touchscreen to work.
This controller is used in the Espressif ESP32-S3-BOX and the ESP32-S3-Korvo-2-LCD extension board for the ESP32-S3-Korvo-2.
.. figure:: images/esp32-s3-box.png
:align: center
:width: 50.0%
TT21100 touchscreen on ESP32-S3-BOX
.. figure:: images/esp32-s3-korvo-2.png
:align: center
:width: 50.0%
TT21100 touchscreen on ESP32-S3-Korvo-2
Base Touchscreen Configuration
------------------------------
.. code-block:: yaml
# Example configuration entry
touchscreen:
platform: tt21100
id: my_touchscreen
interrupt_pin: GPIO3
reset_pin: GPIO48
Configuration variables:
************************
- **id** (*Optional*, :ref:`config-id`): Manually set the ID of this touchscreen.
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- **interrupt_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The touch detection pin.
- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The reset pin of the controller.
- All other options from :ref:`Touchscreen <config-touchscreen>`.
.. warning::
If the reset pin is shared between the display and TT21100 touchscreen
(as is the case for the ESP32-S3-BOX and the ESP32-S3-Korvo-2-LCD),
only configure the reset pin for the display and remove the **reset_pin** variable for the TT21100 touchscreen.
The display component should be initialized before the touchscreen component, which has then already performed the reset.
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Binary Sensor
-------------
In addition to touch areas on the screen configured through the :ref:`Touchscreen <config-touchscreen>` component,
the TT21100 supports up to four buttons located outside of the normal touchscreen area.
On the ESP32-S3-BOX and the ESP32-S3-Korvo-2-LCD, the red circle below the display is such a button.
A binary sensor can be configured to react to touching these buttons.
.. code-block:: yaml
# Example configuration entry
binary_sensor:
- platform: tt21100
name: "Home"
index: 0
Configuration variables:
************************
- **tt21100_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the touchscreen.
- **index** (**Required**, int): Internal index of the touch button, between 0 and 3.
- All other options from :ref:`Binary Sensor <config-binary_sensor>`.
See Also
--------
- :ref:`Binary Sensor Filters <binary_sensor-filters>`
- :apiref:`tt21100/touchscreen/tt21100.h`
- :apiref:`tt21100/binary_sensor/tt21100_button.h`
- :ghedit:`Edit`