1  # Simple demo of the MPL3115A2 sensor.
 2  # Will read the pressure and temperature and print them out every second.
 3  # Author: Tony DiCola
 4  import time
 5  
 6  import board
 7  import busio
 8  
 9  import adafruit_mpl3115a2
10  
11  
12  # Initialize the I2C bus.
13  i2c = busio.I2C(board.SCL, board.SDA)
14  
15  # Initialize the MPL3115A2.
16  sensor = adafruit_mpl3115a2.MPL3115A2(i2c)
17  # Alternatively you can specify a different I2C address for the device:
18  # sensor = adafruit_mpl3115a2.MPL3115A2(i2c, address=0x10)
19  
20  # You can configure the pressure at sealevel to get better altitude estimates.
21  # This value has to be looked up from your local weather forecast or meteorlogical
22  # reports.  It will change day by day and even hour by hour with weather
23  # changes.  Remember altitude estimation from barometric pressure is not exact!
24  # Set this to a value in pascals:
25  sensor.sealevel_pressure = 102250
26  
27  # Main loop to read the sensor values and print them every second.
28  while True:
29      pressure = sensor.pressure
30      print("Pressure: {0:0.3f} pascals".format(pressure))
31      altitude = sensor.altitude
32      print("Altitude: {0:0.3f} meters".format(altitude))
33      temperature = sensor.temperature
34      print("Temperature: {0:0.3f} degrees Celsius".format(temperature))
35      time.sleep(1.0)