#!/usr/bin/env python3

import json
import smbus, time
import requests

bus = smbus.SMBus(1)

# Automatic integration time and current division configuration; one measurement each 800ms
bus.write_byte_data(0x4A, 0x02, 0x00)

time.sleep(1)

data = bus.read_i2c_block_data(0x4A, 0x03, 2)

exponent = (data[0] & 0xF0) >> 4
mantissa = ((data[0] & 0x0F) << 4) | (data[1] & 0x0F)
luminance = ((2 ** exponent) * mantissa) * 0.045

try:
    requests.post('http://influxdb:8086/write?db=sensors', f'max44009,area=hm17_,location=balkon illuminance_lux={luminance}')
except requests.exceptions.ConnectionError:
    pass