MAX31856 Thermocouple Temperature Sensor ======================================== .. seo:: :description: Instructions for setting up MAX31856 Thermocouple temperature sensors. :image: max31856.jpg The ``MAX31856`` temperature sensor allows you to use your MAX31856 Thermocouple temperature sensor (`datasheet `__) with ESPHome. Although the chip supports multiple thermocouple types, this component only implements the ``K`` type. .. figure:: images/max31856-full.jpg :align: center :width: 50.0% MAX31856 Sensor. Image by `Adafruit`_ .. _Adafruit: https://www.adafruit.com/product/3263 As the communication with the MAX31856 is done using SPI, you need to have an :ref:`spi bus ` in your configuration with both **miso_pin** and **mosi_pin** set. - ``VIN`` connects to 5V (``3V3`` will output 3.3V), or directly connect ``3V3`` to 3.3V - ``3Vo`` not used by ESPHome - ``GND`` connects to ground - ``CLK`` connects to the SPI **clk_pin** - ``SDO`` connects to the SPI **miso_pin** - ``SDI`` connects to the SPI **mosi_pin** - ``CS`` connects to a free GPIO pin - ``FLT`` not used by ESPHome - ``DRDY`` not used by ESPHome .. code:: yaml # Example configuration entry spi: clk_pin: GPIO18 miso_pin: GPIO19 mosi_pin: GPIO23 sensor: - platform: max31856 name: "BBQ Temperature" icon: "mdi:hamburger" cs_pin: GPIO17 Configuration variables: ------------------------ - **name** (**Required**, string): The name for the temperature sensor. - **cs_pin** (**Required**, :ref:`Pin Schema `): The Chip Select pin of the SPI interface. - **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``. - **mains_filter** (*Optional*, string): The mains power frequency to reject (``50 Hz`` or ``60 Hz``). Defaults to ``60 Hz``. - **spi_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`SPI Component ` if you want to use multiple SPI buses. - **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation. - All other options from :ref:`Sensor `. See Also -------- - :ref:`sensor-filters` - :doc:`dallas` - :doc:`dht` - :doc:`adc` - :doc:`max6675` - :doc:`max31855` - :doc:`max31865` - `MAX31856 Library `__ by `Adafruit `__ - :apiref:`MAX31856/MAX31856.h` - :ghedit:`Edit`