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190 lines
6.7 KiB
ReStructuredText
190 lines
6.7 KiB
ReStructuredText
SX1509 16 channel I/O Expander with LED driver and keypad engine
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================================================================
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.. seo::
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:description: Instructions for setting up SX1509 16 channel I/O expander in ESPHome.
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:image: sx1509.jpg
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The SX1509 component allows you to expand your I/O capabilities:
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(`datasheet <https://www.semtech.com/uploads/documents/sx1509_evk_users_guide.pdf>`__,
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`SparkFun`_) in ESPHome. It uses :ref:`I²C Bus <i2c>` for communication.
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Once configured, you can use any of the 16 pins as pins for your projects.
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Within ESPHome they emulate a real internal GPIO pin
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and can therefore be used with many of ESPHome's components such as the GPIO
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binary sensor or GPIO switch.
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The SX1509 can do much more than just simple digital pin control. It can produce PWM signals.
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And, with a built-in keypad engine, it can interface with up to 64 buttons set up in an 8x8 matrix.
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Any option accepting a :ref:`Pin Schema <config-pin_schema>` can theoretically be used, but some more
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complicated components that use the pin schema will not work. For example the I²C or SPI pins.
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.. figure:: images/sx1509-full.jpg
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:align: center
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:width: 80.0%
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SX1509 16 channel I/O Expander.
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.. _SparkFun: https://learn.sparkfun.com/tutorials/sx1509-io-expander-breakout-hookup-guide/all
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.. code-block:: yaml
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# Example configuration entry for the SX1509 device
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sx1509:
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- id: sx1509_hub1
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address: 0x3E
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# If you need a keypad
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keypad:
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key_rows: 3
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key_columns: 4
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sleep_time: 256
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scan_time: 2
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debounce_time: 1
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Configuration variables for the SX1509 device:
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----------------------------------------------
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- **id** (**Required**, :ref:`config-id`): The id to use for this SX1509 component.
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- **address** (*Optional*, int): The I²C address of the driver.
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Defaults to ``0x3E``.
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The SX1509 integrates a fully programmable keypad scanning engine to implement keypad applications.
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up to 8x8 matrix (i.e. 64 keys).
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- **keypad** (*Optional*): Add this to enable the keypad.
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- **key_row** (*Required*, int): The number of keypad rows to use. This enables any number of the first 7 pins.
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So a value of 3 enables pins 0,1,2 to be used as the rows for the keypad matrix. This value must be between 1 and 8.
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- **key_columns** (*Required*, int): The number of keypad columns to use. This enables any number of the last 7 pins.
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So a value of 4 enables pins 8,9,10,11 to be used as the columns for the keypad matrix. This value must be between 1 and 8.
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- **sleep_time** (*Optional*, int): No key press within this time will set keypad engine to sleep.
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- **scan_time** (*Optional*, int): Scan time per row (must be set above debounce time).
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- **debounce_time** (*Optional*, int): The debounce time is common to all IOs.
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.. figure:: images/sx1509-keypad.jpg
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:align: center
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:width: 80.0%
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SX1509 pins for keypad setup (image from the datasheet).
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Attention should be paid to the capabilities of the I/O pins.
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+-----+------------------+--------------+
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| # | pin function | Keypad |
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| | | +
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+=====+==================+=====+========+
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| I/O | input output PWM | Row | Column |
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+-----+------------------+-----+--------+
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| 0 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 1 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 2 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 3 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 4 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 5 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 6 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 7 | ✓ | ✓ | |
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+-----+------------------+-----+--------+
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| 8 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 9 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 10 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 11 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 12 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 13 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 14 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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| 15 | ✓ | | ✓ |
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+-----+------------------+-----+--------+
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To use the individual keys on the keypad you need to add individual binary_sensor entries in the config.
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.. code-block:: yaml
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# individual binary_sensor for keypad keys
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binary_sensor:
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- platform: sx1509
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sx1509_id: sx1509_hub1
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name: "keypadkey_0"
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row: 0
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col: 0
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- platform: sx1509
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sx1509_id: sx1509_hub1
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name: "keypadkey_1"
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row: 0
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col: 1
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Configuration variables for the SX1509 keypad keys:
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---------------------------------------------------
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- **row** (**Required**, int): The row number for this key on the keypad.
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- **col** (**Required**, int): The column number for this key on the keypad.
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With the following configuration items you may use the individual pins of the SX1509 as the pins for binary_sensor, switch, or output.
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The outputs can in turn be used to add PWM-enabled lights like the monochromatic light.
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.. code-block:: yaml
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# individual binary_sensor inputs
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binary_sensor:
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- platform: gpio
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name: "SX1509 Pin #0"
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pin:
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sx1509: sx1509_hub1
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# Use pin number 0 on the SX1509
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number: 0
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mode: INPUT_PULLUP
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inverted: True
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# Individual binary outputs
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switch:
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- platform: gpio
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name: "SX1509 Pin #1"
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pin:
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sx1509: sx1509_hub1
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# Use pin number 1 on the SX1509
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number: 1
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# use as output for switch
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mode: OUTPUT
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inverted: False
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# Individual outputs
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output:
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- platform: sx1509
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sx1509_id: sx1509_hub1
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id: 'sx1509_output'
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# Use pin number 2 on the SX1509
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pin: 2
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# lights can then use the configured output
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light:
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- platform: monochromatic
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id: light0
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name: "light0"
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output: sx1509_output
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- All other options from :ref:`Output <config-output>`.
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And naturally you may use all automation functions with these SX1509 binary_sensors, switches and output (lights).
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See Also
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--------
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- :ref:`i2c`
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- :doc:`switch/gpio`
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- :doc:`binary_sensor/gpio`
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- :doc:`/components/light/monochromatic`
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- :apiref:`sx1509/sx1509.h`
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- :ghedit:`Edit`
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