67 lines
2.6 KiB
ReStructuredText
67 lines
2.6 KiB
ReStructuredText
I²C Bus
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=======
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This component sets up the i²c bus for your ESP32 or ESP8266. It’s used
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for several other components:
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======================= ======================= =======================
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|PCA9685 PWM|_ |ADS1115|_ |BMP085|_
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----------------------- ----------------------- -----------------------
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`PCA9685 PWM`_ `ADS1115`_ `BMP085`_
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----------------------- ----------------------- -----------------------
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|HDC1080|_ |HTU21D|_ |MPU6050|_
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----------------------- ----------------------- -----------------------
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`HDC1080`_ `HTU21D`_ `MPU6050`_
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======================= ======================= =======================
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.. |PCA9685 PWM| image:: /esphomeyaml/pca9685.jpg
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:class: component-image
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.. _PCA9685 PWM: /esphomeyaml/components/output/pca9685.html
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.. |ADS1115| image:: /esphomeyaml/ads1115.jpg
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:class: component-image
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.. _ADS1115: /esphomeyaml/components/sensor/ads1115.html
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.. |BMP085| image:: /esphomeyaml/bmp180.jpg
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:class: component-image
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.. _BMP085: /esphomeyaml/components/sensor/bmp085.html
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.. |HDC1080| image:: /esphomeyaml/HDC1080.jpg
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:class: component-image
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.. _HDC1080: /esphomeyaml/components/sensor/hdc1080.html
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.. |HTU21D| image:: /esphomeyaml/htu21d.jpg
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:class: component-image
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.. _HTU21D: /esphomeyaml/components/sensor/htu21d.html
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.. |MPU6050| image:: /esphomeyaml/mpu6050.jpg
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:class: component-image
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.. _MPU6050: /esphomeyaml/components/sensor/mpu6050.html
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In order for those components to work correctly, you need to define the
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i²c bus in your configuration.
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.. code:: yaml
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# Example configuration entry
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i2c:
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sda: 21
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scl: 22
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scan: False
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **sda** (*Optional*, `pin </esphomeyaml/configuration-types.html#pin>`__): The pin for the data line of the i²c bus.
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Defaults to the default of your board (usually GPIO21 for ESP32 and
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GPIO4 for ESP8266).
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- **sdc** (*Optional*, `pin </esphomeyaml/configuration-types.html#pin>`__): The pin for the clock line of the i²c bus.
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Defaults to the default of your board (usually GPIO22 for ESP32 and
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GPIO5 for ESP8266).
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- **scan** (*Optional*, boolean): If esphomelib should do a search of the i2c address space on startup.
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Note that this can slow down startup and is only recommended for when setting up new sensors. Defaults to
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``False``.
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- **frequency** (*Optional*, float): Only on ESP32. Set the frequency
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the i²c bus should operate on. Defaults to “100kHz”. Accepts most
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metric suffixes.
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