#!/usr/bin/python
# VEML6070

import smbus
import time

addrLow   = 0x38
addrHight = 0x39

IT = 4  # RSET=270K, IT = 0...4T

UV_c = [  94, 184, 374, 747]
COM  = [0x02,0x06,0x0A,0x0E]

# Get I2C bus
bus = smbus.SMBus(1)

# Command register, Write to 0x38
# 0x0E == 4T = 500ms
bus.i2c_write_byte(addrLow, COM[IT])

time.sleep(0.6)

# Read MSB data back from 0x39 
data0 = bus.i2c_read_byte(addrHight)

# Read LSB data back from 0x38 
data1 = bus.i2c_read_byte(addrLow)

# Convert the data
uv = data0 * 256 + data1
uvi = uv / UV_c[IT]

# Output data to screen
print "UV      : %d" %uv
print "UV index: %d" %uvi