Wemos D1 Mini BMP180 I2C Shield

Wemos D1 Mini BMP180 I2C Shield er et Temperatur/Barometrisk Tryksensor Shield. Måling af tryk og beregning af højde lokalt. Måler også temperatur.

Tekniske detaljer:

Voltage: 1.8-3.6V
Working Temperature: -30 c ~ 70 c
Interface: I2C/IIC
Driver IC: BMP180
Passer til: Wemos D1 Mini (Køb den HER)

Det er en I2C-sensor, så skjoldet bruger D1 og D2.

#include <Wire.h> 
 
void setup()
{
  Wire.begin();
 
  Serial.begin(9600);
  while (!Serial);             //  wait for serial monitor
  Serial.println("nI2C Scanner");
}
 
 
void loop()
{
  byte error, address;
  int nDevices;
 
  Serial.println("Scanning...");
 
  nDevices = 0;
  for(address = 1; address < 127; address++ )
  {
    // The i2c_scanner uses the return value of
    // the Write.endTransmisstion to see if
    // a device did acknowledge to the address.
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
 
    if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");
 
      nDevices++;
    }
    else if (error==4)
    {
      Serial.print("Unknown error at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices foundn");
  else
    Serial.println("donen");
 
  delay(5000);           // wait 5 seconds for next scan
}

Kode (Programmering)

Nu har jeg fundet adressen på modulet. Min er “0x77”

#include <Wire.h>
#include <Adafruit_BMP085.h>

Adafruit_BMP085 bmp;

void setup() {
Serial.begin(9600);
if (!bmp.begin(0x77)) {
Serial.println("Could not find BMP180 or BMP085 sensor at 0x77");
while (1) {}
}
}

void loop() {
Serial.print("Temperature = ");
Serial.print(bmp.readTemperature());
Serial.println(" °C");

Serial.print("Pressure = ");
Serial.print(bmp.readPressure());
Serial.println(" Pa");

// Calculate altitude assuming 'standard' barometric
// pressure of 1013.25 millibar = 101325 Pascal
Serial.print("Altitude = ");
Serial.print(bmp.readAltitude());
Serial.println(" meters");

Serial.print("Pressure at sea level (calculated) = ");
Serial.print(bmp.readSealevelPressure());
Serial.println(" Pa");

// you can get a more precise measurement of altitude
// if you know the current sea level pressure which will
// vary with weather and such. If it is 1015 millibars
// that is equal to 101500 Pascals.
Serial.print("Real altitude = ");
Serial.print(bmp.readAltitude(101500));
Serial.println(" meters");

Serial.println();
delay(2000);
}

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