#!/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(1)

# Spew readings
while True:
#Write data to file in CSV format
  with open ('/home/pi/diddyborg/data.csv','w') as datafile:
    datafile.write (str ((" %.2f m") % (freshwaterDepth)) + "\n")
time.sleep (1)
        
        
if sensor.read():
               print(("Depth: %.2f m (freshwater)") % (freshwaterDepth))
else:
                print("Sensor read failed!")
                exit(1)