GY-21P Atmospheric Humidity Temperature Sensor Breakout Barometric Pressure BMP280 SI7021 For Arduino
Source:
Libraries:
https://github.com/adafruit/Adafruit_Sensor
https://github.com/adafruit/Adafruit_BMP280_Library
https://github.com/adafruit/Adafruit_Si7021
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// http://arduinolearning.com/code/arduino-gy-21p-module-example.php #include <Wire.h> #include <Adafruit_Sensor.h> #include <Adafruit_BMP280.h> #include "Adafruit_Si7021.h" Adafruit_BMP280 bme; // I2C Adafruit_Si7021 sensor = Adafruit_Si7021(); void setup() { Serial.begin(9600); Serial.println("BMP280 and SI7021 (GY-21p) test"); if (!bme.begin()) { Serial.println("Could not find a valid BMP280 sensor, check wiring!"); while (1); } if (!sensor.begin()) { Serial.println("Did not find Si7021 sensor!"); while (true); } } void loop() { Serial.println("BMP280 results"); Serial.print("Temperature = "); Serial.print(bme.readTemperature()); Serial.println(" *C"); Serial.print("Pressure = "); Serial.print(bme.readPressure()); Serial.println(" Pa"); Serial.print("Approx altitude = "); Serial.print(bme.readAltitude(1013.25)); // this should be adjusted to your local forcase Serial.println(" m"); Serial.println(); Serial.println("SI7021 results"); Serial.print("Humidity: "); Serial.println(sensor.readHumidity(), 2); Serial.print("Temperature: "); Serial.println(sensor.readTemperature(), 2); Serial.println(); delay(2000); } |