BME280 Pressure Sensor
Measure barometric air pressure, relative humidity, and temperature from BME280 sensor
Since R2022b
Add-On Required: This feature requires the Simulink Support Package for Raspberry Pi Hardware add-on.
Libraries:
Simulink Support Package for Raspberry Pi Hardware /
Sensors /
Environmental Sensors
Description
The BME280 block outputs the values of barometric air pressure and relative humidity as measured by the BME280 sensor connected to Raspberry Pi® board. The block also outputs the temperature as read by the BME280 sensor.
Ports
Output
Pressure — Barometric air pressure measured by BME280 sensor
scalar
Barometric air pressure (in Pascal (Pa)) measured by a BME280 sensor that is connected toRaspberry Pi board.
Dependencies
This output port appears only if you select the Pressure (Pa) parameter.
Data Types: double
Temperature — Temperature measured by BME280 sensor
scalar
Temperature (in ℃) measured by BME280 sensor connected to Raspberry Pi board.
Dependencies
This output port appears only if you select the Temperature (℃) parameter.
Data Types: double
Humidity — Relative humidity measured by BME280 sensor
scalar
Relative humidity (in %) measured by BME280 sensor connected to Raspberry Pi board.
Dependencies
This output port appears only if you select the Humidity (%) parameter.
Data Types: double
Status — Status of read values
0
| 1
Status of read values from the BME280 sensor, to indicate if the data read is the
new value or not. The Status value of 0
indicates that the data read is new and 1
indicates that the data
read is not new.
Dependencies
This output port appears only if you select the Status parameter.
Data Types: uint8
Parameters
I2C module — Module for communication
1
(default)
Specify the module on the board that you are using for I2C communication.
I2C address — I2C address of BME280 sensor
0x76
(default) | 0x77
The I2C address used by BME280 sensor communicating with the Raspberry Pi board.
Pressure (Pa) — Set output port for reading pressure
on
(default) | off
Select this parameter to set Pressure as one of the output ports.
Temperature (℃) — Set output port for reading temperature
on
(default) | off
Select this parameter to set Temperature as one of the output ports.
Humidity (%) — Set output port for reading humidity
on
(default) | off
Select this parameter to set Humidity as one of the output ports.
Status — Set output port for obtaining status of values read
off
(default) | on
Select this parameter to set Status as one of the output ports.
Filter coefficient — Filter coefficient for IIR filter
0
(default) | 2
| 4
| 8
| 16
Specify filter coefficient for the IIR filter while reading pressure and temperature values from BME280 sensor. Selecting a non-zero value for filter coefficient helps to improve the step response and remove short-term fluctuations in the measured values.
Stand by time — Standby time to read values
0.5
(default) | 10
| 20
| 62.5
| 125
| 250
| 500
| 1000
Specify the standby time (in ms) when the processor stays idle (inactive duration) while reading values from BME280 sensor. The selection of this value affects the total cycle time.
Pressure oversampling factor — Oversampling factor for the measured pressure value
1
(default) | 2
| 4
| 8
| 16
Specify the oversampling factor to reduce the noise for the pressure value read from BME280 sensor. This value is a multiplication factor that affects measurement rate and current consumption.
Humidity oversampling factor — Oversampling factor for the measured humidity value
1
(default) | 2
| 4
| 8
| 16
Specify the oversampling factor to reduce the noise for the humidity value read from BME280 sensor. This value is a multiplication factor that affects measurement rate and current consumption.
Temperature oversampling factor — Oversampling factor for the measured humidity value
1
(default) | 2
| 4
| 8
| 16
Specify the oversampling factor to reduce the noise for the temperature value read from BME280 sensor. This value is a multiplication factor that affects measurement rate and current consumption.
Data type — Output data type for values from BME280 sensor
single
(default) | double
Specify the output data type for the values read from BME280 sensor. The default
data type for Raspberry Piboard is single
. Use this parameter to change the values
to double
, if required.
Sample time — Time interval to read data
-1
(default) | positive integer
Specify how often this block reads the data from the BME280 sensor. When you set this parameter to -1, Simulink determines the best sample time for the block based on the block context within the model.
Version History
Introduced in R2022b
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