boards/shields/adafruit_mcp9808/doc/index.rst
.. _adafruit_mcp9808:
Adafruit MCP9808 Shield #######################
Overview
The Adafruit MCP9808 High Accuracy I2C Temperature Sensor Shield_ features
a Microchip MCP9808 Temperature Sensor_ and two STEMMA QT connectors.
.. figure:: adafruit_mcp9808.webp :align: center :alt: Adafruit MCP9808 Shield
Adafruit MCP9808 Shield (Credit: Adafruit)
Requirements
This shield can be used with boards which provide an I2C connector, for
example STEMMA QT or Qwiic connectors.
The target board must define a zephyr_i2c node label.
See :ref:shields for more details.
+--------------+-----------------------+ | Shield Pin | Function | +==============+=======================+ | SDA | MCP9808 I2C SDA | +--------------+-----------------------+ | SCL | MCP9808 I2C SCL | +--------------+-----------------------+ | A0 | MCP9808 I2C address | +--------------+-----------------------+ | ALERT | MCP9808 interrupt out | +--------------+-----------------------+
In order to use interrupts you need to connect a separate wire from the
shield to a GPIO pin on your microcontroller board. See
:dtcompatible:jedec,jc-42.4-temp for documentation on how to adjust the
devicetree file.
Programming
Set --shield adafruit_mcp9808 when you invoke west build. For example
when running the :zephyr:code-sample:jc42 temperature measurement sample:
.. zephyr-app-commands:: :zephyr-app: samples/sensor/jc42 :board: adafruit_qt_py_rp2040 :shield: adafruit_mcp9808 :goals: build
.. _Adafruit MCP9808 High Accuracy I2C Temperature Sensor Shield: https://learn.adafruit.com/adafruit-mcp9808-precision-i2c-temperature-sensor-guide
.. _Microchip MCP9808 Temperature Sensor: https://www.microchip.com/en-us/product/mcp9808