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#!/usr/bin/python
# -*- coding: utf-8 -*-

import re, os, rrdtool, time

# ds20b18
def read_sensor(path):
  value = "U"
  try:
    f = open(path, "r")
    line = f.readline()
    if re.match(r"([0-9a-f]{2} ){9}: crc=[0-9a-f]{2} YES", line):
      line = f.readline()
      m = re.match(r"([0-9a-f]{2} ){9}t=([+-]?[0-9]+)", line)
      if m:
        value = str(float(m.group(2)) / 1000.0)
    f.close()
  except (IOError), e:
    print time.strftime("%x %X"), "Error reading", path, ": ", e
  return value

data = 'N'
data += ':'
data += read_sensor("/sys/bus/w1/devices/28-00044a52d2ff/w1_slave")
data += ':'
data += str(os.system("shelly.sh"))


# insert data into round-robin-database
# rrdtool.update("/home/pi/bosch.rrd",data)

print "bosch.rrd: ", data

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pi@Raspi-B:~ $ ./getbosch.py
42.57
bosch.rrd:  N:26.437:0
pi@Raspi-B:~ $ 

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pi@Raspi-B:~ $ shelly.sh
42.51
pi@Raspi-B:~ $

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#!/usr/bin/env python3
import logging
import re
import subprocess

import rrdtool

LOGGER = logging.Logger(__name__)

SENSOR_FILENAME = '/sys/bus/w1/devices/28-00044a52d2ff/w1_slave'
RRD_FILENAME = '/home/pi/bosch.rrd'
SHELLY_FILENAME = 'shelly.sh'

HEX_VALUE_PATTERN = '(?:[0-9a-f]{2} ){9}'
CRC_RE = re.compile(HEX_VALUE_PATTERN + ': crc=[0-9a-f]{2} YES')
VALUE_RE = re.compile(HEX_VALUE_PATTERN + 't=(?P<value>[+-]?[0-9]+)')


def read_sensor(path):
    try:
        with open(path, 'r', encoding='ASCII') as lines:
            if CRC_RE.match(next(lines)):
                match = VALUE_RE.match(next(lines))
                if match:
                    return int(match.group('value')) / 1000
    except IOError:
        LOGGER.exception('Error reading %s', path)
    
    return None


def main():
    value = read_sensor(SENSOR_FILENAME)
    shelly_result = subprocess.run(
        SHELLY_FILENAME,
        check=True,
        stdout=subprocess.PIPE,
        universal_newlines=True,
    )
    data = f'N:{"U" if value is None else value}:{shelly_result.stdout}'
    rrdtool.update(RRD_FILENAME, data)
    print('RRD data:', data)


if __name__ == '__main__':
    main()

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pi@Raspi-B:~ $ getbosch.py
RRD data: N:29.125:41.12

Traceback (most recent call last):
  File "/usr/bin/getbosch.py", line 51, in <module>
    main()
  File "/usr/bin/getbosch.py", line 45, in main
    rrdtool.update(RRD_FILENAME, data)
rrdtool.OperationalError: /home/pi/bosch.rrd: Function update_pdp_prep, case DST_GAUGE - Converted '41.02
' to 41.020000, but cannot convert '
'

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f = subprocess.check_output("shelly.sh")
    if f:
        value = str(float(f))

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#!/usr/bin/env python3

import logging
import re
import subprocess
import time

import rrdtool

LOGGER = logging.Logger(__name__)

SENSOR_FILENAME = '/sys/bus/w1/devices/28-00044a52d2ff/w1_slave'
RRD_FILENAME = '/home/pi/bosch.rrd'
SHELLY_FILENAME = 'shelly.sh'

HEX_VALUE_PATTERN = '(?:[0-9a-f]{2} ){9}'
CRC_RE = re.compile(HEX_VALUE_PATTERN + ': crc=[0-9a-f]{2} YES')
VALUE_RE = re.compile(HEX_VALUE_PATTERN + 't=(?P<value>[+-]?[0-9]+)')


def read_sensor(path):
    try:
        with open(path, 'r', encoding='ASCII') as lines:
            if CRC_RE.match(next(lines)):
                match = VALUE_RE.match(next(lines))
                if match:
                    return int(match.group('value')) / 1000
    except IOError:
        LOGGER.exception('Error reading %s', path)

    return None


def main():
    while 1:
        value = read_sensor(SENSOR_FILENAME)
        shelly_result = subprocess.run(
            SHELLY_FILENAME,
            check=True,
            stdout=subprocess.PIPE,
            universal_newlines=True,
        )
        data = f'N:{"U" if value is None else value}:{shelly_result.stdout}'
        rrdtool.update(RRD_FILENAME, data)
        print('RRD data:', data)
        time.sleep(10)


if __name__ == '__main__':
    main()