||6 years ago|
|Makefile||6 years ago|
|README.md||6 years ago|
|main.c||6 years ago|
This is a test application for the BME280 and BMP280 sensors. Both can measure pressure and temperature. The BME280 can also measure relative humidity.
The application will initialize the BME280/BMP280 device and display its calibration coefficients. More information can be found on the Bosch website, in the [BST-BME280_DS001-11 datasheet] 2 and in the [BST-BMP280-DS001-12 datasheet] 3.
Notice that it is necessary to first read the temperature even if only one of the other values (humidity or pressure) is needed. This is described in the above mentioned datasheet.
After initialization, every 2 seconds, the application:
- reads and displays the temperature (d°C);
- reads and displays the pressure (Pa);
- reads and displays the humidity (%rH) (only with bme280);
Overruling default parameters
If your device is at a different I2C address than the default (0x77) you can build the test as follows:
export CFLAGS=-DBME280_PARAM_I2C_ADDR=0x76 make -C tests/driver_bme280 BOARD=sodaq-autonomo
By default, the test application is built to use the bme280 module, to build it for
the bmp280, in the Makefile change
USEMODULE += bme280 with:
USEMODULE += bmp280