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79 lines
3.4 KiB
ReStructuredText
79 lines
3.4 KiB
ReStructuredText
TMP1075 Temperature Sensor
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==========================
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.. seo::
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:description: Instructions for setting up the TMP1075 Temperature sensor.
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:image: tmp1075.jpg
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:keywords: TMP1075
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The TMP1075 Temperature sensor allows you to use your TMP1075
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(`datasheet <https://www.ti.com/lit/gpn/tmp1075>`__)
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sensors with ESPHome.
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.. figure:: images/tmp1075.jpg
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:align: center
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:width: 30.0%
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TMP1075 Temperature Sensor.
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(Credit: `Texas Instruments <https://www.ti.com/content/dam/ticom/images/products/ic/sensing-products/chips/tmp1075-technical-chip-shot.png>`__, image cropped and compressed)
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The TMP1075 is a high precision temperature sensor that communicates over I²C.
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Each sensor is tested on a NIST tracable test setup during Texas Instruments'
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production process. Accuracy is typically ±0.25°C across the -55°C to +125°C
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range, with a maximum error of ±2°C in that same range and ±1°C in the -40°C to
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+110°C range.
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To use the sensor, first set up an :ref:`I²C Bus <i2c>` and connect the sensor
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to the specified pins.
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: tmp1075
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name: "Temperature TMP1075"
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update_interval: 10s
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i2c_id: i2c_bus
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conversion_rate: 27.5ms
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alert:
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function: comparator
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polarity: active_high
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limit_low: 50
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limit_high: 75
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fault_count: 1
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Configuration variables:
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------------------------
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- **address** (*Optional*, int): The I²C address of the sensor.
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See :ref:`I²C Addresses <tmp1075_i2c_addresses>` for more information. Defaults to ``0x48``.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check
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the sensor temperature. Defaults to ``60s``.
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- **conversion_rate** (*Optional*): The interval at which the IC performs a
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temperature measurement. This setting also determines how fast the alert pin
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responds to temperature changes, and is thus independent of how often ESPHome
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checks the sensor. Possible values are ``27.5ms``, ``55ms``, ``110ms``, and
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``220ms``. Defaults to ``27.5ms``.
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- **alert** (*Optional*): Configure the alert pin behaviour.
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- **function** (*Optional*, enum): Function of the alert pin, either ``comparator`` or ``interrupt``. Defaults to ``comparator``.
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- **polarity** (*Optional*, enum): Polarity of the alert pin, either ``active_high`` or ``active_low``. Defaults to ``active_high``.
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- **limit_low** (*Optional*, int): Lower temperature limit, in °C. Defaults to ``-128`` (the lowest possible limit value).
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- **limit_high** (*Optional*, int): Higher temperature limit, in °C. Defaults to ``127.9375`` (the highest possible limit value).
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- **fault_count** (*Optional*, int): Number of measurements. required for the alert pin to act. Must be between ``1`` and ``4``, inclusive. Defaults to ``1``.
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- All other options from :ref:`Sensor <config-sensor>`.
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.. _tmp1075_i2c_addresses:
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I²C Addresses
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-------------
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In order to allow multiple sensors to be connected to the same I²C bus, the
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creators of this sensor hardware have included some options to change the I²C
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address. Three address pins can be connected to GND, VCC, SDA, or SCL, creating
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32 possible addresses. See section 9.3.2.2 of the `datasheet
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<https://www.ti.com/lit/gpn/tmp1075>`__ for the mapping table.
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When all address pins are connected to GND, the address is ``0x48``, which is
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the default address for this sesnsor component.
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