SEN0226

  Gravity: I2C BMP280 Barometer Sensor SKU: SEN0226  Introduction The upgraded Pressure & Altitude Sensor Gravity BMP280 by DFRobot has the functions both on detecting temperature and air pressure. It can be connected to Arduino, and controlled by Arduino code. Compared to the old edition BMP180, BMP280 has lower power consumption, more precise measurement, lower noise and higher sampling frequency. Normally, pressure sensors measure the air pressure and the temperature. Because of the relation between the air pressure and the altitude, we can use the air pressure sensor to measure the altitude and the building height. BMP280 is also suitable for navigation, by the use of Inertia Measurement Unit (IMU), BMP280 can be used in GPS refinement, 3D in-door navigation and floor detection. The BMP280 is based on Bosch’s proven Piezo-resistive pressure sensor technology featuring high EMC robustness, high accuracy and linearity and long term stability. The relative accuracy is ±0.12 hPa, which is equivalent to ±1 m difference in altitude. The operating temperature range for long tern stability is 0 ~65 . Attention: because the sensor is very sensitive to the environment, please don’t touch it. Applications       Enhancement of GPS navigation (e.g. time-to-first-fix improvement, dead-reckoning, slope detection) Indoor navigation (floor detection, elevator detection) Outdoor navigation, leisure and sports applications Weather forecast Health care applications (e.g. spirometry) Vertical velocity indication (e.g. rise/sink speed) Specification           Operating Voltage: 3.3V/5V Operating Current: 2.7µA @ 1 Hz sampling frequency Pressure Measurement Range: 300 ~ 1100 hPa (equivalent to +9000…-500 m above/below sea level) Relative Accuracy: ±0.12 hPa, equiv. to ±1 m (@25 ) Temperature Measurement Range: 0 ~65 Temperature Accuracy: 0.01 Operating Temperature range: ：-40 ~+85 Dimension: 30mm*22mm Interface: Gravity-I2C 4pin Weight: 12g Board Overview Gravity: I2C BMP280 Baromete r Sensor Label Description SDA I2C Data SCL I2C Clock GND GND VCC 3.3/5V Tutorial To measure the air pressure and temperature of the local environment, and calculate the altitude of the sensor. Requirements  Hardware DFRduino UNO (or similar) x 1 Gravity: I2C BMP280 Barometer Sensor x1 M-M/F-M/F-F Jumper wires  Software Arduino IDE Click to Download Arduino IDE from Arduino® https://www.arduino.cc/en/Main/Software%7C Connection Diagram Sample Code Download BMP280 library. How to install Libraries in Arduino IDE https://github.com/DFRobot/DFRobot_BMP280 https://www.arduino.cc/en/Guide/Libraries#.UxU8mdzF9H0%7C Copy the following code to Arduino IDE and upload to your Arduino /*! * @file bmp280test.ino * @brief DFRobot's Temperature & Barometer. * @n This example read the Temperature, Barometer and Altitude from BMP280, and then print them * * @copyright [DFRobot](http://www.dfrobot.com), 2016 * @copyright GNU Lesser General Public License * * @version * @date V1.0 2016-12-06 */ #include #include "DFRobot_BMP280.h" DFRobot_BMP280 bmp280; void setup() { Serial.begin(9600); Serial.println("BMP280 demo"); if (!bmp280.begin()) { Serial.println("Could not find a valid BMP280 sensor!"); while (1); } } void loop() { Serial.print("Temperature = "); Serial.print(bmp280.readTemperatureValue()); Serial.println(" *C"); Serial.print("Pressure = "); Serial.print(bmp280.readPressureValue()); Serial.println(" Pa"); Serial.print("Altitude = "); Serial.print(bmp280.readAltitudeValue(1013.25)); // this should be adjust ed to your local forcase Serial.println(" m"); Serial.println(); delay(2000); } Expected Results For any questions, advice or cool ideas to share, please visit the DFRobot Forum. https://www.dfrobot.com/wiki/index.php/Gravity:_I2C_BMP280_Barometer_Sensor_SKU:_SEN0226 6-6-17