.. _thermometer-sample:
Thermometer sample
##################
Overview
********
This sample application periodically measures the ambient temperature
at 1Hz. The result is written to the console.
Wiring
*******
VDD pin should be connected to 2.3V to 5.5V
GND pin connected to 0V
VOUT pin connected to the ADC input pin.
.. _`MCP970X Sensor`: http://ww1.microchip.com/downloads/en/devicedoc/20001942g.pdf
An overlay is provided for the nrf52840dk_nrf52840 board with the
sensor connected to pin AIN7.
Building and Running
********************
To build for the nrf52840dk_nrf52840 board use:
.. zephyr-app-commands::
:zephyr-app: samples/sensor/thermometer
:board: nrf52840dk_nrf52840
:goals: build flash
:compact:
To build for other boards and ambient temperature sensors, enable the sensor
node that supports ``SENSOR_CHAN_AMBIENT_TEMP`` and use an overlay to create an
alias named ``ambient-temp0`` to link to the node. See the overlay used for the
``nrf52840dk_nrf52840`` board within this sample:
``boards/nrf52840dk_nrf52840.overlay``
Sample Output
=============
.. code-block:: console
*** Booting Zephyr OS build zephyr-v3.3.0-1205-g118f73e12a70 ***
Thermometer Example (arm)
Temperature device is 0x6150, name is mcp9700a
Temperature is 24.0°C
Temperature is 24.1°C
Temperature is 24.2°C
Temperature is 24.1°C
Temperature is 24.0°C
Temperature is 24.1°C
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