56 lines
1.4 KiB
ReStructuredText
56 lines
1.4 KiB
ReStructuredText
.. _adt7420:
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ADT7420: High accuracy digital I2C temperature sensor
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#####################################################
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Description
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***********
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This sample application periodically (1Hz) measures the ambient temperature
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in degrees Celsius. The result is written to the console.
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Optionally, it also shows how to use the upper and lower threshold triggers.
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References
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**********
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- ADT7420: http://www.analog.com/adt7420
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Wiring
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*******
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This sample uses the ADT7420 sensor controlled using the I2C interface.
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Connect Supply: **VDD**, **GND** and Interface: **SDA**, **SCL**
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and optionally connect the **INT** to a interrupt capable GPIO.
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The supply voltage can be in the 2.7V to 5.5V range.
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Depending on the baseboard used, the **SDA** and **SCL** lines require Pull-Up
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resistors.
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Building and Running
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********************
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This project outputs sensor data to the console. It requires an ADT7420
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sensor. It should work with any platform featuring a I2C peripheral interface.
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It does not work on QEMU.
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In this example below the :ref:`nrf52_pca10040` board is used.
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.. zephyr-app-commands::
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:zephyr-app: samples/sensors/adt7420
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:board: nrf52_pca10040
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:goals: build flash
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Sample Output
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=============
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.. code-block:: console
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device is 0x20002b74, name is ADT7420
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temperature 24.984375 C
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temperature 24.968750 C
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temperature 24.968750 C
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temperature 24.968750 C
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temperature 24.953125 C
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<repeats endlessly>
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