On Friday, 20 September 2019 12:04:33 UTC+1, Andrew Milner wrote: > > perhaps it would help us if you attached a copy of your weewx.conf > > > > On Friday, 20 September 2019 13:34:25 UTC+3, Laurent Lasne wrote: >> >> Hi Everyone, >> >> Weather station : Raspberry pi3, running Raspbian buster >> Adafruit PCF8523 Real Time Clock Assembled >> Breakout Board [ADA3295] >> <https://thepihut.com/products/adafruit-pcf8523-real-time-clock-assembled-breakout-board> >> Driver for weewx: jardiamj/BYOWS_RPi >> <https://github.com/jardiamj/BYOWS_RPi> >> >> Tutorial : Build your own weather station_Raspberry pi >> project >> <https://projects.raspberrypi.org/en/projects/build-your-own-weather-station> >> >> (Uploading data to weather underground) >> >> >> After getting my station up and running perfectly using the python3 >> code from the tutorial: SQLite, all sensors reading and upload to weather >> underground, I decided to give a go to weewx, but I have an issue. When I >> start weewx manually >> sudo weewxd /etc/weewx/weewx.conf >> >> I got that in my /var/log/Syslog when debug = 1 in : weewx.conf >> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Initializing weewx >>>> version 3.9.2 >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Using Python 2.7.16 >>>> (default, Apr 6 2019, 01:42:57) #012[GCC 8.2.0] >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Platform >>>> Linux-4.19.66-v7+-armv7l-with-debian-10.1 >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Locale is 'en_GB.UTF-8' >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Using configuration >>>> file /etc/weewx/weewx.conf >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Debug is 1 >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Initializing engine >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Loading station type >>>> BYOWS (user.byows_rpi) >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Import of driver >>>> failed: int() can't convert non-string with explicit base (<type >>>> 'exceptions.TypeError'>) >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: engine: Unable to load driver: >>>> int() can't convert non-string with explicit base >>> >>> Sep 20 11:17:52 raspberrypi weewx[4040]: **** Exiting... >>> >>> >> I know that wiring is ok because working with python3 >> I did reinstall libraries for python 2.7 >> I made some research but come empty-handed >> I am not a programmer, just in learning phase python3 (first language for >> me). >> Not bad knowledge of Linux, Debian ubuntu Knoppix, etc... >> I don't know what to do next, I hope I will get help. >> Thank you for your time >> >>
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# WEEWX CONFIGURATION FILE # # Copyright (c) 2009-2019 Tom Keffer <[email protected]> # See the file LICENSE.txt for your rights. ############################################################################## # This section is for general configuration information. # Set to 1 for extra debug info, otherwise comment it out or set to zero debug = 1 # Root directory of the weewx data file hierarchy for this station WEEWX_ROOT = / # Whether to log successful operations log_success = True # Whether to log unsuccessful operations log_failure = True # How long to wait before timing out a socket (FTP, HTTP) connection socket_timeout = 20 # Do not modify this. It is used when installing and updating weewx. version = 3.9.2 ############################################################################## # This section is for information about the station. [Station] # Description of the station location location = "Grove Hill Kilkeel Down NI" # Latitude and longitude in decimal degrees latitude = 54.065 longitude = -6.028 # Altitude of the station, with unit it is in. This is downloaded from # from the station if the hardware supports it. altitude = 44, meter # Set to type of station hardware. There must be a corresponding stanza # in this file with a 'driver' parameter indicating the driver to be used. station_type = BYOWS # If you have a website, you may specify an URL #station_url = http://www.example.com # The start of the rain year (1=January; 10=October, etc.). This is # downloaded from the station if the hardware supports it. rain_year_start = 1 # Start of week (0=Monday, 6=Sunday) week_start = 6 ############################################################################## [BYOWS] # This section is for the Raspberry Pi Bring Your Own Weather Station driver. # [REQUIRED] # The driver to use. driver = user.byows_rpi [Simulator] # This section is for the weewx weather station simulator # The time (in seconds) between LOOP packets. loop_interval = 2.5 # The simulator mode can be either 'simulator' or 'generator'. # Real-time simulator. Sleep between each LOOP packet. mode = simulator # Generator. Emit LOOP packets as fast as possible (useful for testing). #mode = generator # The start time. Format is YYYY-mm-ddTHH:MM. If not specified, the default # is to use the present time. #start = 2011-01-01T00:00 # The driver to use: driver = weewx.drivers.simulator ############################################################################## # This section is for uploading data to Internet sites [StdRESTful] [[StationRegistry]] # To register this weather station with weewx, set this to true register_this_station = false [[AWEKAS]] # This section is for configuring posts to AWEKAS. # If you wish to do this, set the option 'enable' to true, # and specify a username and password. # To guard against parsing errors, put the password in quotes. enable = false username = replace_me password = replace_me [[CWOP]] # This section is for configuring posts to CWOP. # If you wish to do this, set the option 'enable' to true, # and specify the station ID (e.g., CW1234). enable = false station = replace_me # If this is an APRS (radio amateur) station, uncomment # the following and replace with a passcode (e.g., 12345). #passcode = replace_me (APRS stations only) [[PWSweather]] # This section is for configuring posts to PWSweather.com. # If you wish to do this, set the option 'enable' to true, # and specify a station and password. # To guard against parsing errors, put the password in quotes. enable = false station = replace_me password = replace_me [[WOW]] # This section is for configuring posts to WOW. # If you wish to do this, set the option 'enable' to true, # and specify a station and password. # To guard against parsing errors, put the password in quotes. enable = false station = replace_me password = replace_me [[Wunderground]] # This section is for configuring posts to the Weather Underground. # If you wish to do this, set the option 'enable' to true, # and specify a station (e.g., 'KORHOODR3') and password. # To guard against parsing errors, put the password in quotes. enable = false station = replace_me password = replace_me # Set the following to True to have weewx use the WU "Rapidfire" # protocol. Not all hardware can support it. See the User's Guide. rapidfire = False ############################################################################## # This section specifies what reports, using which skins, to generate. [StdReport] # Where the skins reside, relative to WEEWX_ROOT SKIN_ROOT = /etc/weewx/skins # Where the generated reports should go, relative to WEEWX_ROOT HTML_ROOT = /var/www/html/weewx # The database binding indicates which data should be used in reports. data_binding = wx_binding # Whether to log a successful operation log_success = True # Whether to log an unsuccessful operation log_failure = False # Each of the following subsections defines a report that will be run. # See the customizing guide to change the units, plot types and line # colors, modify the fonts, display additional sensor data, and other # customizations. Many of those changes can be made here by overriding # parameters, or by modifying templates within the skin itself. [[SeasonsReport]] # The SeasonsReport uses the 'Seasons' skin, which contains the # images, templates and plots for the report. skin = Seasons enable = true [[SmartphoneReport]] # The SmartphoneReport uses the 'Smartphone' skin, and the images and # files are placed in a dedicated subdirectory. skin = Smartphone enable = false HTML_ROOT = /var/www/html/weewx/smartphone [[MobileReport]] # The MobileReport uses the 'Mobile' skin, and the images and files # are placed in a dedicated subdirectory. skin = Mobile enable = false HTML_ROOT = /var/www/html/weewx/mobile [[StandardReport]] # This is the old "Standard" skin. By default, it is not enabled. skin = Standard enable = false [[FTP]] # FTP'ing the results to a webserver is treated as just another report, # albeit one with an unusual report generator! skin = Ftp # If you wish to use FTP, set "enable" to "true", then # fill out the next four lines. # Use quotes around passwords to guard against parsing errors. enable = false user = replace_me password = replace_me server = replace_me # The ftp server name, e.g, www.myserver.org path = replace_me # The destination directory, e.g., /weather # Set to True for an FTP over TLS (FTPS) connection. Not all servers # support this. secure_ftp = False # To upload files from something other than what HTML_ROOT is set # to above, specify a different HTML_ROOT here. #HTML_ROOT = /var/www/html/weewx # Most FTP servers use port 21 port = 21 # Set to 1 to use passive mode, zero for active mode passive = 1 [[RSYNC]] # rsync'ing to a webserver is treated as just another report skin = Rsync # If you wish to use rsync, you must configure passwordless ssh using # public/private key authentication from the user account that weewx # runs to the user account on the remote machine where the files # will be copied. # # If you wish to use rsync, set "enable" to "true", then # fill out server, user, and path. # The server should appear in your .ssh/config file. # The user is the username used in the identity file. # The path is the destination directory, such as /var/www/html/weather. # Be sure that the user has write permissions on the destination! enable = false server = replace_me user = replace_me path = replace_me # To upload files from something other than what HTML_ROOT is set # to above, specify a different HTML_ROOT here. #HTML_ROOT = /var/www/html/weewx # Rsync can be configured to remove files from the remote server if # they don't exist under HTML_ROOT locally. USE WITH CAUTION: if you # make a mistake in the remote path, you could could unintentionally # cause unrelated files to be deleted. Set to 1 to enable remote file # deletion, zero to allow files to accumulate remotely. delete = 0 #### # Various options for customizing your reports. [[Defaults]] [[[Units]]] # The following section sets what unit to use for each unit group. # NB: The unit is always in the singular. I.e., 'mile_per_hour', # NOT 'miles_per_hour' [[[[Groups]]]] group_altitude = meter # Options are 'foot' or 'meter' group_degree_day = degree_C_day # Options are 'degree_F_day' or 'degree_C_day' group_pressure = mbar # Options are 'inHg', 'mmHg', 'mbar', or 'hPa' group_rain = cm # Options are 'inch', 'cm', or 'mm' group_rainrate = cm_per_hour # Options are 'inch_per_hour', 'cm_per_hour', or 'mm_per_hour' group_speed = km_per_hour # Options are 'mile_per_hour', 'km_per_hour', 'knot', or 'meter_per_second' group_speed2 = km_per_hour2 # Options are 'mile_per_hour2', 'km_per_hour2', 'knot2', or 'meter_per_second2' group_temperature = degree_C # Options are 'degree_F' or 'degree_C' # The following section sets the formatting for each type of unit. [[[[StringFormats]]]] centibar = %.0f cm = %.2f cm_per_hour = %.2f degree_C = %.1f degree_F = %.1f degree_compass = %.0f foot = %.0f hPa = %.1f hour = %.1f inHg = %.3f inch = %.2f inch_per_hour = %.2f km_per_hour = %.0f km_per_hour2 = %.1f knot = %.0f knot2 = %.1f mbar = %.1f meter = %.0f meter_per_second = %.1f meter_per_second2 = %.1f mile_per_hour = %.0f mile_per_hour2 = %.1f mm = %.1f mmHg = %.1f mm_per_hour = %.1f percent = %.0f second = %.0f uv_index = %.1f volt = %.1f watt_per_meter_squared = %.0f NONE = " N/A" # The following section sets the label for each type of unit [[[[Labels]]]] day = " day", " days" hour = " hour", " hours" minute = " minute", " minutes" second = " second", " seconds" NONE = "" # The following section sets the format for each time scale. # The values below will work in every locale, but they may not look # particularly attractive. [[[[TimeFormats]]]] hour = %H:%M day = %X week = %X (%A) month = %x %X year = %x %X rainyear = %x %X current = %x %X ephem_day = %X ephem_year = %x %X [[[[Ordinates]]]] # Ordinal directions. The last one is for no wind direction directions = N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW, N/A # The following section sets the base temperatures used for the # calculation of heating and cooling degree-days. [[[[[DegreeDays]]]]] # Base temperature for heating days, with unit: heating_base = 65, degree_F # Base temperature for cooling days, with unit: cooling_base = 65, degree_F # A trend takes a difference across a time period. The following # section sets the time period, and how big an error is allowed to # still be counted as the start or end of a period. [[[[[Trend]]]]] time_delta = 10800 # 3 hours time_grace = 300 # 5 minutes # The labels to be used for each observation type [[[Labels]]] # Set to hemisphere abbreviations suitable for your location: hemispheres = N, S, E, W # Formats to be used for latitude whole degrees, longitude whole # degrees, and minutes: latlon_formats = %02d, %03d, %05.2f # Generic labels, keyed by an observation type. [[[[Generic]]]] barometer = Barometer dewpoint = Dew Point ET = ET heatindex = Heat Index inHumidity = Inside Humidity inTemp = Inside Temperature outHumidity = Humidity outTemp = Outside Temperature radiation = Radiation rain = Rain rainRate = Rain Rate UV = UV Index windDir = Wind Direction windGust = Gust Speed windGustDir = Gust Direction windSpeed = Wind Speed windchill = Wind Chill windgustvec = Gust Vector windvec = Wind Vector extraTemp1 = Temperature1 extraTemp2 = Temperature2 extraTemp3 = Temperature3 # Sensor status indicators rxCheckPercent = Signal Quality txBatteryStatus = Transmitter Battery windBatteryStatus = Wind Battery rainBatteryStatus = Rain Battery outTempBatteryStatus = Outside Temperature Battery inTempBatteryStatus = Inside Temperature Battery consBatteryVoltage = Console Battery heatingVoltage = Heating Battery supplyVoltage = Supply Voltage referenceVoltage = Reference Voltage [[[Almanac]]] # The labels to be used for the phases of the moon: moon_phases = New, Waxing crescent, First quarter, Waxing gibbous, Full, Waning gibbous, Last quarter, Waning crescent ############################################################################## # This service acts as a filter, converting the unit system coming from # the hardware to a unit system in the database. [StdConvert] # The target_unit affects only the unit system in the database. Once # chosen it cannot be changed without converting the entire database. # Modification of target_unit after starting weewx will result in # corrupt data - the database will contain a mix of US and METRIC data. # # The value of target_unit does not affect the unit system for # reporting - reports can display US, Metric, or any combination of units. # # In most cases, target_unit should be left as the default: US # # In particular, those migrating from a standard wview installation # should use US since that is what the wview database contains. # DO NOT MODIFY THIS VALUE UNLESS YOU KNOW WHAT YOU ARE DOING! target_unit = US # Options are 'US', 'METRICWX', or 'METRIC' ############################################################################## # This section can adjust data using calibration expressions. [StdCalibrate] [[Corrections]] # For each type, an arbitrary calibration expression can be given. # It should be in the units defined in the StdConvert section. # Example: foo = foo + 0.2 ############################################################################## # This section is for quality control checks. If units are not specified, # values must be in the units defined in the StdConvert section. [StdQC] [[MinMax]] barometer = 26, 32.5, inHg pressure = 24, 34.5, inHg outTemp = -40, 120, degree_F inTemp = 10, 120, degree_F outHumidity = 0, 100 inHumidity = 0, 100 windSpeed = 0, 120, mile_per_hour rain = 0, 10, inch ############################################################################## # This section controls the origin of derived values. [StdWXCalculate] [[Calculations]] # How to calculate derived quantities. Possible values are: # hardware - use the value provided by hardware # software - use the value calculated by weewx # prefer_hardware - use value provide by hardware if available, # otherwise use value calculated by weewx pressure = prefer_hardware barometer = prefer_hardware altimeter = prefer_hardware windchill = prefer_hardware heatindex = prefer_hardware dewpoint = prefer_hardware inDewpoint = prefer_hardware rainRate = prefer_hardware ############################################################################## # For hardware that supports it, this section controls how often the # onboard clock gets updated. [StdTimeSynch] # How often to check the weather station clock for drift (in seconds) clock_check = 14400 # How much it can drift before we will correct it (in seconds) max_drift = 5 ############################################################################## # This section is for configuring the archive service. [StdArchive] # If the station hardware supports data logging then the archive interval # will be downloaded from the station. Otherwise, specify it (in seconds). archive_interval = 300 # If possible, new archive records are downloaded from the station # hardware. If the hardware does not support this, then new archive # records will be generated in software. # Set the following to "software" to force software record generation. record_generation = hardware # Whether to include LOOP data in hi/low statistics loop_hilo = True # The data binding used to save archive records data_binding = wx_binding ############################################################################## # This section binds a data store to a database. [DataBindings] [[wx_binding]] # The database must match one of the sections in [Databases]. # This is likely to be the only option you would want to change. database = archive_sqlite # The name of the table within the database table_name = archive # The manager handles aggregation of data for historical summaries manager = weewx.wxmanager.WXDaySummaryManager # The schema defines the structure of the database. # It is *only* used when the database is created. schema = schemas.wview.schema ############################################################################## # This section defines various databases. [Databases] # A SQLite database is simply a single file [[archive_sqlite]] database_name = weewx.sdb database_type = SQLite # MySQL [[archive_mysql]] database_name = weewx database_type = MySQL ############################################################################## # This section defines defaults for the different types of databases. [DatabaseTypes] # Defaults for SQLite databases [[SQLite]] driver = weedb.sqlite # Directory in which the database files are located SQLITE_ROOT = /var/lib/weewx # Defaults for MySQL databases [[MySQL]] driver = weedb.mysql # The host where the database is located host = localhost # The user name for logging in to the host user = weewx # The password for the user name (quotes guard against parsing errors) password = weewx ############################################################################## # This section configures the internal weewx engine. [Engine] [[Services]] # This section specifies the services that should be run. They are # grouped by type, and the order of services within each group # determines the order in which the services will be run. prep_services = weewx.engine.StdTimeSynch data_services = , process_services = weewx.engine.StdConvert, weewx.engine.StdCalibrate, weewx.engine.StdQC, weewx.wxservices.StdWXCalculate archive_services = weewx.engine.StdArchive restful_services = weewx.restx.StdStationRegistry, weewx.restx.StdWunderground, weewx.restx.StdPWSweather, weewx.restx.StdCWOP, weewx.restx.StdWOW, weewx.restx.StdAWEKAS report_services = weewx.engine.StdPrint, weewx.engine.StdReport
#!/usr/bin/env python """ Copyright 2019 Jardi A. Martinez Jordan <[email protected]> This is an weeWX driver implementation of the Build Your OWN Weather Station using the Raspberry Pi: https://projects.raspberrypi.org/en/projects/build-your-own-weather-station/ This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. """ import math import syslog import time import datetime # Imports specific for ByowsRpiStation class from gpiozero import Button, MCP3008 import os, glob import bme280 import smbus2 import weewx.drivers DRIVER_NAME = 'BYOWS' DRIVER_VERSION = '0.51' def loader(config_dict, _): return ByowsRpi(**config_dict[DRIVER_NAME]) """ def confeditor_loader(): return ByowsRpiConfEditor() """ def logmsg(level, msg): syslog.syslog(level, 'BYOWS RPi: %s' % msg) def logdbg(msg): logmsg(syslog.LOG_DEBUG, msg) def loginf(msg): logmsg(syslog.LOG_INFO, msg) def logerr(msg): logmsg(syslog.LOG_ERR, msg) class ByowsRpi(weewx.drivers.AbstractDevice): """weewx driver for the Build Your Own Weather Station - Raspberry Pi """ def __init__(self, **stn_dict): self.hardware = stn_dict.get('hardware', "BYOWS - Raspberry Pi") self.loop_interval = float(stn_dict.get('loop_interval', 5)) params = dict() params['anem_pin'] = int(stn_dict.get('anemometer_pin', 5)) params['rain_bucket_pin'] = int(stn_dict.get('rain_bucket_pin', 6)) params['bme280_port'] = int(stn_dict.get('bme280_port', 1)) params['bme280_address'] = int(stn_dict.get('bme280_address', 0x77), 16) params['mcp3008_channel'] = int(stn_dict.get('mcp3008_channel', 0)) params['anem_adjustment'] = float(stn_dict.get('anemometer_adjustment', 1.18)) params['bucket_size'] = float(stn_dict.get('bucket_size', 0.2794)) params['anem_radius_cm'] = float(stn_dict.get('anemometer_radius_cm', 9.0)) loginf('using driver %s' % DRIVER_NAME) loginf('driver version is %s' % DRIVER_VERSION) self.station = ByowsRpiStation(**params) @property def hardware_name(self): return self.hardware def genLoopPackets(self): """ Function that generates packets for weeWX by looping through station data generator function. """ while True: packet = {'dateTime': int(time.time() + 0.5), 'usUnits': weewx.METRIC} data = self.station.get_data() packet.update(data) yield packet time.sleep(self.loop_interval) # defaults to 5 seconds class ByowsRpiStation(object): """ Object that represents a BYOWS_Station. """ CM_IN_A_KM = 100000.0 SECS_IN_AN_HOUR = 3600 def __init__(self, **params): """ Initialize Object. """ self.bme280_address = params.get('bme280_address') self.bme280_bus = smbus2.SMBus(params.get('bme280_port')) self.bme280_sensor = bme280 self.bme280_sensor.load_calibration_params(self.bme280_bus, self.bme280_address) self.bucket_size = params.get('bucket_size') # in mm self.rain_count = 0 self.wind_gauge = WindGauge(params.get('mcp3008_channel'), params.get('anem_pin'), params.get('anem_radius_cm'), params.get('anem_adjustment')) self.rain_sensor = Button(params.get('rain_bucket_pin')) self.rain_sensor.when_pressed = self.bucket_tipped self.temp_probe = DS18B20() def bucket_tipped(self): self.rain_count = self.rain_count + 1 def get_bme280_data(self): try: data = self.bme280_sensor.sample(self.bme280_bus,self.bme280_address) humidity, pressure, temperature = data.humidity, data.pressure, data.temperature except: logdbg("Error sampling sensor bme280, passing None as data.") humidity, pressure, temperature = None, None, None pass return humidity, pressure, temperature def get_soil_temp(self): return self.temp_probe.read_temp() def get_rainfall(self): """ Returns rainfall in cm. """ rainfall = (self.rain_count * self.bucket_size)/10.0 self.reset_rainfall() return rainfall def get_data(self): """ Generates data packets every time interval. """ data = dict() anem_rotations = self.wind_gauge.wind_count/2.0 time_interval = self.wind_gauge.last_wind_time - time.time() wind_speed, wind_dir = self.wind_gauge.get_wind() humidity, pressure, ambient_temp = self.get_bme280_data() data['outHumidity'] = humidity data['pressure'] = pressure data['outTemp'] = ambient_temp data['soilTemp1'] = self.get_soil_temp() data['windSpeed'] = float(wind_speed) data['windDir'] = wind_dir data['rain'] = float(self.get_rainfall()) data['anemRotations'] = anem_rotations data['timeAnemInterval'] = time_interval return data def reset_rainfall(self): self.rain_count = 0 class DS18B20(object): """ add the lines below to /etc/modules (reboot to take effect) w1-gpio w1-therm """ def __init__(self): w1_devices = glob.glob("/sys/bus/w1/devices/28*") self.device_file = w1_devices[0] + '/w1_slave' if len(w1_devices) > 0 else None def read_temp_raw(self): if self.device_file != None: f = open(self.device_file, "r") lines = f.readlines() f.close() return lines else: return None def crc_check(self, lines): return lines[0].strip()[-3:] == "YES" def read_temp(self): temp_c = -255 attempts = 0 lines = self.read_temp_raw() if lines != None: success = self.crc_check(lines) while not success and attempts < 3: time.sleep(.2) lines = self.read_temp_raw() success = self.crc_check(lines) attempts += 1 if success: temp_line = lines[1] equal_pos = temp_line.find("t=") if equal_pos != -1: temp_string = temp_line[equal_pos+2:] temp_c = float(temp_string)/1000.0 return temp_c else: return None class WindGauge(object): """ Object that represents a Wind Vane sensor. """ WIND_VANE_VOLTS = { 0.4: 0.0, 1.4: 22.5, 1.2: 45.0, 2.8: 67.5, 2.7: 90.0, 2.9: 112.5, 2.2: 135.0, 2.5: 157.5, 1.8: 180.0, 2.0: 202.5, 0.7: 225.0, 0.8: 247.5, 0.1: 270.0, 0.3: 292.5, 0.2: 315.0, 0.6: 337.5} CM_IN_A_KM = 100000.0 SECS_IN_AN_HOUR = 3600 def __init__(self,channel=0, anem_pin=5, anem_radius=9.0, anem_adjustment=1.18): # pass channel of MCP3008 where wind vane is connected to self.adc = MCP3008(channel) self.wind_count = 0 # Counts how many half-rotations self.last_wind_time = time.time() self.wind_speed_sensor = Button(anem_pin) self.wind_speed_sensor.when_pressed = self.spin self.anemometer_radius_cm = anem_radius # Radius of your anemometer self.anemometer_adjustment = anem_adjustment # Every half-rotations, add 1 to count def spin(self): self.wind_count = self.wind_count + 1 def reset_wind(self): self.wind_count = 0 self.last_wind_time = time.time() def get_wind_speed(self): """ Function that returns wind speed in km/hr. """ wind_speed = self.calculate_speed(time.time() - self.last_wind_time) self.reset_wind() # reset wind_count and last time reading return wind_speed def get_wind(self, length=5): """ Function that returns wind as a vector: speed, direction.""" return self.get_wind_speed(), self.read_direction() def calculate_speed(self, time_sec): circumference_cm = (2 * math.pi) * self.anemometer_radius_cm rotations = self.wind_count / 2.0 # Calculate distance travelled by a cup in km dist_km = (circumference_cm * rotations) / self.CM_IN_A_KM # Speed = distance / time km_per_sec = dist_km / time_sec km_per_hour = km_per_sec * self.SECS_IN_AN_HOUR # Calculate Speed final_speed = km_per_hour * self.anemometer_adjustment return final_speed def read_direction(self): wind = round(self.adc.value*3.3,1) if not wind in self.WIND_VANE_VOLTS: # keep only good measurements logdbg('Unknown Wind Vane value: %s' % str(wind)) return None else: return self.WIND_VANE_VOLTS[wind] def get_average_direction(self, length=5): # Get the average wind direction in a length of time in seconds data = [] # print("Measuring wind direction for %d seconds..." % length) start_time = time.time() while time.time() - start_time <= length: direction = self.read_direction() if direction is not None: data.append(direction) return get_average(data) def get_average(angles): # Function that returns the average angle from a list of angles sin_sum = 0.0 cos_sum = 0.0 for angle in angles: r = math.radians(angle) sin_sum += math.sin(r) cos_sum += math.cos(r) flen = float(len(angles)) s = sin_sum / flen c = cos_sum / flen arc = math.degrees(math.atan(s / c)) average = 0.0 if s > 0 and c > 0: average = arc elif c < 0: average = arc + 180 elif s < 0 and c > 0: average = arc + 360 return 0.0 if average == 360 else average """ Section for testing purposes, so file can be run outside of weeWX. invoke this as follows from the weewx root dir: PYTHONPATH=bin python bin/weewx/drivers/byows_rpi.py""" if __name__ == '__main__': station = ByowsRpiStation() packet = {'dateTime': int(time.time() + 0.5), 'usUnits': weewx.METRIC} interval = 5 data = station.get_data(interval) # defaults to 5 seconds packet.update(data) print(packet)
