29 917
modifications
Modifications
Sauter à la navigation
Sauter à la recherche
Ligne 2 :
Ligne 2 : − + − + − +
ENG-CANSAT-PICO-BMP280 (voir la source)
Version du 26 février 2022 à 17:43
, 26 février 2022 à 17:43→About the BMP280 breakout
== About the BMP280 breakout ==
== About the BMP280 breakout ==
The BMP280 sensor can measure the atmospheric pressure and temperature (because the temperature also impact the sensor physics).
The BMP280 sensor can measure the atmospheric pressure and temperature. As the temperature also impact the sensor physics, the sensor measure it to apply appropriate correction to the measured pression.
The BMP280 is a Bosch sensor upgraded from the BMP085/BMP180/BMP183 serie. This sensor is really great to make environmental or weather measurements. Best of all, it can be used over an I2C or a SPI bus!
The BMP280 is a Bosch sensor upgraded from the BMP085/BMP180/BMP183 serie. This sensor is really great to make environmental or weather measurements. Best of all, it can be used over an I2C or a SPI bus!
[[fichier:BMP280.jpg|250px]]
[[fichier:BMP280.jpg|250px]] [[fichier:BMP280-v2.jpg|250px]]
It is one of the best sensor, it offer good accuracy for an affordable price. The accuracy is ±1 hPa for the pressure and ±1.0°C for the temperature. This sensor is not really made to measure the temperature but you can estimate its range with the BMP280.
It is one of the best sensor, it offer good accuracy for an affordable price. The accuracy is ±1 hPa for the pressure and ±1.0°C for the temperature. This sensor is not really made to measure the temperature but you can estimate its range with the BMP280.
As the pressure also change with the altitude, the sensor accuracy allows you to use the BMP280 to make an altimeter (with accuracy of ±1m at worste, about 0.25m in best conditions).
As the pressure also change with the altitude, the sensor accuracy allows you to use the BMP280 to make an altimeter (with accuracy of ±1m at worst, about 0.25m in best conditions).
To ease the usage of this sensor, the SMD component is solder on a breakout board with some additional passive electronics. The board also bring a level shifter and 3V voltage regulator so it is save for 3V and 5V logic microcontrolers.
To ease the usage of this sensor, the SMD component is solder on a breakout board with some additional passive electronics. The board also bring a level shifter and 3V voltage regulator so it is save for 3V and 5V logic microcontrolers.