SMT100 Soil Moisture Sensor ================================ .. seo:: :description: Instructions for setting up SMT100 soil moisture and temperature sensor :image: smt100.jpg :keywords: smt100 The SMT100 sensor platform allows you to use the SMT100 soil moisture and temperature with ESPHome. .. figure:: images/smt100.jpg :align: center :width: 50.0% The communication with this integration is done over a UART bus using a simple ASCII protocol. You must therefore have a ``uart:`` entry in your configuration with both the TX and RX pins set to some pins on your board and the baud rate set to 9600. .. code-block:: yaml # Example configuration entry uart: tx_pin: TX rx_pin: RX baud_rate: 9600 sensor: - platform: smt100 counts: name: "Counts" permittivity: name: "Permittivity" temperature: name: "Temperature" moisture: name: "Moisture" voltage: name: "Voltage" Configuration variables: ------------------------ - **counts** (*Optional*): Raw measurement data from the sensor electronics (dimensionless quantity). Higher counts mean less moisture. May be used for material specific calibrations. - **name** (**Required**): Sensor name. - All other options from :ref:`Sensor `. - **Permittivity** (*Optional*): Permittivity or dielectric coefficient of the material to be measured (dimensionless quantity. Higher permittivity means higher water content. May be used for material specific calibration. - **name** (**Required**): Sensor name. - All other options from :ref:`Sensor `. - **temperature** (*Optional*): Soil temperature in degrees Celsius. Please note that the temperature sensor is inside the black sensor enclosure and requires some time to equilibrate with the soil temperature. - **name** (**Required**): Sensor name. - All other options from :ref:`Sensor `. - **moisture** (*Optional*): Soil moisture (volumetric water content in %). - **name** (**Required**): Sensor name. - All other options from :ref:`Sensor `. - **voltage** (*Optional*): Supply voltage of the sensor in Volt. - **name** (**Required**): Sensor name. - All other options from :ref:`Sensor `. - **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`UART Component ` if you want to use multiple UART buses. - **update_interval** (*Optional*, :ref:`config-time`): The interval to pull the sensor. Defaults is 60s. See Also -------- - :doc:`/components/sensor/smt100` - :ref:`sensor-filters` - :apiref:`smt100/smt100.h` - :ghedit:`Edit`