example.py

#!/usr/bin/python
import ms5837
import time

sensor = ms5837.MS5837_30BA() # Default I2C bus is 1 (Raspberry Pi 3)
#sensor = ms5837.MS5837_30BA(0) # Specify I2C bus
#sensor = ms5837.MS5837_02BA()
#sensor = ms5837.MS5837_02BA(0)
#sensor = ms5837.MS5837(model=ms5837.MS5837_MODEL_30BA, bus=0) # Specify model and bus

# We must initialize the sensor before reading it
if not sensor.init():
        print "Sensor could not be initialized"
        exit(1)

# We have to read values from sensor to update pressure and temperature
if not sensor.read():
    print "Sensor read failed!"
    exit(1)

print("Pressure: %.2f atm  %.2f Torr  %.2f psi") % (
sensor.pressure(ms5837.UNITS_atm),
sensor.pressure(ms5837.UNITS_Torr),
sensor.pressure(ms5837.UNITS_psi))

print("Temperature: %.2f C  %.2f F  %.2f K") % (
sensor.temperature(ms5837.UNITS_Centigrade),
sensor.temperature(ms5837.UNITS_Farenheit),
sensor.temperature(ms5837.UNITS_Kelvin))

freshwaterDepth = sensor.depth() # default is freshwater
sensor.setFluidDensity(ms5837.DENSITY_SALTWATER)
saltwaterDepth = sensor.depth() # No nead to read() again
sensor.setFluidDensity(1000) # kg/m^3
print("Depth: %.3f m (freshwater)  %.3f m (saltwater)") % (freshwaterDepth, saltwaterDepth)

# fluidDensity doesn't matter for altitude() (always MSL air density)
print("MSL Relative Altitude: %.2f m") % sensor.altitude() # relative to Mean Sea Level pressure in air

time.sleep(5)

# Spew readings
while True:
        if sensor.read():
                print("P: %0.1f mbar  %0.3f psi\tT: %0.2f C  %0.2f F") % (
                sensor.pressure(), # Default is mbar (no arguments)
                sensor.pressure(ms5837.UNITS_psi), # Request psi
                sensor.temperature(), # Default is degrees C (no arguments)
                sensor.temperature(ms5837.UNITS_Farenheit)) # Request Farenheit
        else:
                print "Sensor read failed!"
                exit(1)