Interfacing MPL3115A2 Altitude Sensor with Arduino UNO/ Mega
MPL3115A2 is an altitude sensor that operates at 3.3 volts.
Connection Diagram:
To Interface Altitude sensor with Arduino Mega:
To Interface Altitude sensor with Arduino UNO:
Altitude Sensor Library for Arduino:
Search for “MPL3115”, then select and Install “Adafruit MPL3115A2 Library”
Arduino Code:
#include <Wire.h>
#include <Adafruit_MPL3115A2.h>
Adafruit_MPL3115A2 baro = Adafruit_MPL3115A2();
void setup() {
Serial.begin(9600);
Serial.println("Adafruit_MPL3115A2 test!");
}
void loop() {
if (! baro.begin()) {
Serial.println("Couldnt find sensor");
return;
}
float pascals = baro.getPressure();
// Our weather page presents pressure in Inches (Hg)
// Use http://www.onlineconversion.com/pressure.htm for other units
Serial.print(pascals/3377); Serial.println(" Inches (Hg)");
float altm = baro.getAltitude();
Serial.print(altm); Serial.println(" meters");
float tempC = baro.getTemperature();
Serial.print(tempC); Serial.println("*C");
delay(250);
}
Results:
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