219 lines
7.2 KiB
Python
219 lines
7.2 KiB
Python
#!/usr/bin/python -u
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'''
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--------------------------------------------------------------------------------
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Type: Python 3.x script
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Author: Milan Toman (milan.v.toman@gmail.com)
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Description: Weather station (davis vantage vue) collector, coupled with
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the infamous arduino source on
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http://wp.spoton.cz/2017/11/24/davis-vantague-vue-arduino-and-a-raspberry-pi-3/
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en-fucking-joy
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influxDB SCHEMA:
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DB weather
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measure temphumi
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----------------
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temperature | humidity | external, internal | pressure
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---------------------------------------------------------
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field field tag field
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--------------------------------------------------------------------------------
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Import libraries
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--------------------------------------------------------------------------------
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'''
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# mandatory
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import requests
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import sys
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import os
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import re
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import textwrap
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import argparse
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import time
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import datetime
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import serial
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import simplejson as json
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import influxdb
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# optionally, future modules, locally available, I hate dependencies
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from pprint import pprint
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_SCRIPT_PATH = os.path.dirname(os.path.abspath(sys.argv[0]))
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sys.path.append(_SCRIPT_PATH + "/lib")
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#import ventilLogger
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'''
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--------------------------------------------------------------------------------
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Define variables
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--------------------------------------------------------------------------------
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'''
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_VERSION = 1.0
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_NAME = u"Vantage Vue external measure enrichment"
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_LOG_DIR = _SCRIPT_PATH + '/log/'
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_LOG_FILE_ROOT = re.sub(u'./', '', sys.argv[0])
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_LOG_FILE = _LOG_DIR + _LOG_FILE_ROOT + u'.log'
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_DEBUG_FILE = _LOG_DIR + _LOG_FILE_ROOT + u'.dbg'
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# finite loop implementation, tout for 43200 cycles
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tout = 0
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_ABS_ZERO = 273.15
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_HEIGHT = 455
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_EXT_MEASURE_DEVICE = '/dev/ttyUSBext'
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pressure_adjusted = 0
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influx_weather_write = []
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influx_host = 'localhost'
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influx_port = 8086
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influx_user = 'pi'
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influx_pwd = 'Ventil6996'
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weather_db = 'weather_v2'
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'''
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--------------------------------------------------------------------------------
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Set up logging - disabled, need to enable this iin future
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--------------------------------------------------------------------------------
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'''
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'''
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--------------------------------------------------------------------------------
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Setup arguments and Options - not edited, sample shite
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--------------------------------------------------------------------------------
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'''
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desc = u'''\
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DESCRIPTION:
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Vantage Vue pressure enrichment script
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'''
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epi = u'''\
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ERROR CODES:
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?
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EXAMPLES:
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?
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'''
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formatter = argparse.RawDescriptionHelpFormatter
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arg_parser = argparse.ArgumentParser(description = desc,
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formatter_class = formatter,
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epilog = textwrap.dedent(epi))
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args = arg_parser.parse_args()
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'''
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--------------------------------------------------------------------------------
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Generic, standalone functions
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--------------------------------------------------------------------------------
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'''
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# Obvious shit, set up the client class
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influx_weather_client = influxdb.client.InfluxDBClient(
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influx_host, influx_port, influx_user, influx_pwd, weather_db
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)
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'''
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--------------------------------------------------------------------------------
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Classes
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'''
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class extDataDecode(object):
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def __init__(self):
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__name__ = u'Davis external data decoder'
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self.height = _HEIGHT
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self.temp_dict = {}
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def load_external_data(self):
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# Data external to the ISS
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self.pressure = float(external_data['P'])
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self.inside_temp = round(float(external_data['T']), 2)
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self.inside_hum = external_data['H']
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def adjust_pressure(self, temp):
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sh = 0.0065 * self.height
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base = 1 - (sh) / (temp + sh + _ABS_ZERO)
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result = round(self.pressure * pow(base, -5.257), 2)
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return result
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class DBwriter(object):
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def __init__(self):
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__name__ = "Database writer class, Influx"
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def construct(self, connector, measurement, fields, tags):
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""" Takes values in a writes them to influxdb
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requires: list(connector): connector with all ticks to be written
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at once
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str(measurement): the measurement ID to be written
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dict(fields): fields to be written in one tick
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dict(tags): tags to be written with the fields
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returns: list(result_connector)
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"""
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result_connector = connector
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result_connector.append({"measurement": measurement,
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"fields": fields,
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"tags": tags}
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)
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return result_connector
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'''
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--------------------------------------------------------------------------------
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Main
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--------------------------------------------------------------------------------
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'''
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if '__main__':
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davis_decoder = extDataDecode()
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davis_writer = DBwriter()
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try:
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with serial.Serial(_EXT_MEASURE_DEVICE, 9600) as data:
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# Now, let it run a couple times, end and restart via systemd
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while tout < 400:
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line = data.readline()
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#print(line)
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external_data = 0
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try:
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external_data = eval(line)
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except SyntaxError as e_syntax:
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print("ERROR (syntax): {}".format(e_syntax))
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except TypeError as e_type:
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print("ERROR (Type): {}".format(e_type))
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except ValueError as e_value:
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print("ERROR (Type): {}".format(e_value))
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if external_data != 0:
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# Get data external to the ISS, from local PCB / internal
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# sensors and create base values for influx writing
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davis_decoder.load_external_data()
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influx_weather_write = davis_writer.construct(
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influx_weather_write,
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"temphumi",
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{"pressure": davis_decoder.pressure},
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{"type" : "raw"}
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)
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influx_weather_write = davis_writer.construct(
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influx_weather_write,
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"temphumi",
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{"pressure": davis_decoder.inside_temp},
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{"type" : "internal"}
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)
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influx_weather_write = davis_writer.construct(
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influx_weather_write,
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"temphumi",
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{"pressure": davis_decoder.inside_hum},
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{"type" : "internal"}
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)
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# Write the whole blob into Influx DB
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influx_weather_client.write_points(influx_weather_write)
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tout = tout + 1
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time.sleep(1)
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else:
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print("No data here, mate.")
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except serial.serialutil.SerialException as e:
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print("Serial Error {}".format(e))
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