ESP32 BMP280 BMP280 大氣壓強度(高度計)感測模組
ESP32 SCL (GPIO 22) and SDA (GPIO 21) pins
#include <Wire.h> // include Wire library, required for I2C devices
#include <Adafruit_Sensor.h> // include Adafruit sensor library
#include <Adafruit_BMP280.h> // include adafruit library for BMP280 sensor
#define BMP280_I2C_ADDRESS 0x76
Adafruit_BMP280 bmp280;
void setup() {
Serial.begin(115200);
Serial.println(F("BME280 test"));
if (!bmp280.begin(BMP280_I2C_ADDRESS))
{
Serial.println("Could not find a valid BMP280 sensor, check wiring!");
while (1);
}
}
void loop()
{
// get temperature, pressure and altitude from library
float temperature = bmp280.readTemperature(); // get temperature
float pressure = bmp280.readPressure(); // get pressure
float altitude_ = bmp280.readAltitude(1013.25); // get altitude (this should be adjusted to your local forecast)
//1013.15需修正
//該1013.25值應為數百Pa處的海平面局部壓力。
//如果要顯示高於地面的高度，則需要知道該位置，並編寫代碼以計算高度偏移。
//海平面：泛指我們所處的高度，即1大氣壓(1atm或1013.25hPa 或 1013.25mb)
//That 1013.25 value should be the local pressure at sea level in hundreds of Pa.
//If want to show altitude above ground level, you will need to know that for your location and write your code to calculate the altitude offset.
// print data on the serial monitor software
// 1: print temperature
Serial.print("Temperature CELSIUS 攝氏溫度= ");
Serial.print(temperature);
Serial.println(" °C");
float TempF = (temperature*1.8)+32;
Serial.print("Temperature FAHRENHEIT 華氏溫度= ");
Serial.print(TempF);
Serial.println(" °F");
// 2: print pressure
Serial.print("Pressure 大氣壓力百帕(hPa)= ");
Serial.print(pressure/100);
Serial.println(" hPa");
// 3: print altitude
Serial.print("Approx Altitude 大概海拔高度= ");
Serial.print(altitude_);
Serial.println(" m");
delay(2000);
}
