2019-03-27 15:24:28 +08:00
|
|
|
.. _bme280:
|
|
|
|
|
|
|
|
|
|
BME280 Humidity and Pressure Sensor
|
|
|
|
|
###################################
|
|
|
|
|
|
|
|
|
|
Overview
|
|
|
|
|
********
|
|
|
|
|
|
|
|
|
|
This sample application periodically reads temperature, pressure and humidity data from
|
|
|
|
|
the first available device that implements SENSOR_CHAN_AMBIENT_TEMP, SENSOR_CHAN_PRESS,
|
|
|
|
|
and SENSOR_CHAN_HUMIDITY. This sample checks the sensor in polling mode (without
|
|
|
|
|
interrupt trigger).
|
|
|
|
|
|
|
|
|
|
Building and Running
|
|
|
|
|
********************
|
|
|
|
|
|
2019-06-13 20:31:56 +08:00
|
|
|
This sample application uses an BME280 sensor connected to a board via I2C.
|
2019-03-27 15:24:28 +08:00
|
|
|
Connect the sensor pins according to the connection diagram given in the `bme280 datasheet`_
|
|
|
|
|
at page 38.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.. zephyr-app-commands::
|
2019-10-08 01:12:11 +08:00
|
|
|
:zephyr-app: samples/sensor/bme280
|
2020-03-17 19:41:28 +08:00
|
|
|
:board: nrf52840dk_nrf52840
|
2019-03-27 15:24:28 +08:00
|
|
|
:goals: flash
|
|
|
|
|
:compact:
|
|
|
|
|
|
|
|
|
|
Sample Output
|
|
|
|
|
=============
|
|
|
|
|
To check output of this sample , any serial console program can be used.
|
2019-06-13 20:31:56 +08:00
|
|
|
This example uses ``picocom`` on the serial port ``/dev/ttyACM0``:
|
2019-03-27 15:24:28 +08:00
|
|
|
|
|
|
|
|
.. code-block:: console
|
|
|
|
|
|
|
|
|
|
$ sudo picocom -D /dev/ttyUSB0
|
|
|
|
|
|
|
|
|
|
.. code-block:: console
|
|
|
|
|
|
|
|
|
|
temp: 27.950000; press: 100.571027; humidity: 61.014648
|
|
|
|
|
temp: 27.940000; press: 100.570269; humidity: 61.012695
|
|
|
|
|
temp: 27.950000; press: 100.570695; humidity: 61.002929
|
|
|
|
|
|
2019-06-13 20:31:56 +08:00
|
|
|
.. _bme280 datasheet: https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf
|
