| .. _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 |
