Thanks Patrick, I am not familiar with this hardware at all so am really clutching at straws here. I can see no obvious (to me) issue. I have attached a copy of byows.py that has some some additional logging in it so we can see some of the intermediate values that the code is using. To use:
1. rename your current byows.py to byows_orig.py 2. download the attached byows.py in place of your current byows.py 3. restart weeWX 4. let weeWX run for 5-10 minutes and then take a log extract from when you restarted weeWX covering the entire 5-10 minute period 5. post the log extract here. 6. revert byows.py back to the version you were using by deleting byows.py and renaming byows_orig.py to byows.py then restarting weeWX Gary On Monday, 14 January 2019 18:29:36 UTC+10, Patrick Tranchant wrote: > > hello Gary, > > I give you my python script that I use without weewx to measure *the Wind > and also Rain* . > thanks > > Patrick > > > On Saturday, December 8, 2018 at 3:40:43 PM UTC+1, Patrick Tranchant wrote: >> >> hello I am a newbie from France ( sorry for my english ) >> >> I want to use weewx on a raspberry with a weather station built by myself >> (view on Magpi) >> I don't see my station on your website to configure : >> >> Weather Station Hardware Comparison: I don't found my weather station. >> Do you have a solution or how to configure Weewx >> >> thank you for your help >> >> Patrick >> > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
#!/usr/bin/python # Created by Pat O'Brien 2019 - https://obrienlabs.net # # This driver takes the sensors used in the Raspberry Pi # build your own weather station project and converts it # into a format that can be used with weewx. # # The Raspberry Pi project can be found here: # https://projects.raspberrypi.org/en/projects/build-your-own-weather-station # import os # POB REMOVE os.environ['GPIOZERO_PIN_FACTORY'] = os.environ.get('GPIOZERO_PIN_FACTORY', 'mock') # POB REMOVE from gpiozero import Button import time import math import bme280_sensor_2 import wind_direction_byo_5 import statistics import ds18b20_therm import datetime import syslog import weedb import weewx.drivers import weeutil.weeutil import weewx.wxformulas temp_probe = ds18b20_therm.DS18B20() def logmsg(dst, msg): syslog.syslog(dst, 'BYOWS: %s' % msg) def loginf(msg): logmsg(syslog.LOG_INFO, msg) def logerror(msg): logmsg(syslog.LOG_ERROR, msg) def logdebug(msg): logmsg(syslog.LOG_DEBUG, msg) def loader(config_dict, engine): station = BYOWS(**config_dict['BYOWS']) return station class BYOWS(weewx.drivers.AbstractDevice): """ Driver for the Raspberry Pi Bring Your Own Weather Station. """ def __init__(self, **stn_dict) : """ Initialize object. """ self.station_hardware = stn_dict.get('hardware') # TODO CONVERT TO WEEWX OPTIONS? self.interval = 60 # Measurements recorded every 1 minute self.wind_count = 0 # Counts how many half-rotations self.radius_cm = 9.0 # Radius of your anemometer self.wind_interval = 5 # How often (secs) to sample speed self.wind_gust = 0 self.cm_in_a_km = 100000.0 self.secs_in_an_hour = 3600 self.adjustment = 1.18 self.bucket_size = 0.2794 # mm self.rain_count = 0 self.store_speeds = [] self.store_directions = [] self.wind_speed_sensor = Button(5) self.wind_speed_sensor.when_pressed = self.spin() # is this a valid call for the below class function? self.rain_sensor = Button(6) self.rain_sensor.when_pressed = self.bucket_tipped() # is this a valid call for the below class function? def hardware_name(self): return self.station_hardware # Every half-rotations, add 1 to count def spin(self): self.wind_count = self.wind_count + 1 loginf("incremented self.wind_count") #print("spin" + str(self.wind_count)) def calculate_speed(self, time_sec): circumference_cm = (2 * math.pi) * self.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.adjustment loginf("calculated wind speed final_speed=%s self.wind_count=%s" % (final_speed, self.wind_count)) return final_speed def bucket_tipped(self): self.rain_count = self.rain_count + 1 #print (self.rain_count * self.bucket_size) def reset_rainfall(self): self.rain_count = 0 def reset_wind(self): self.wind_count = 0 def reset_gust(self): self.wind_gust = 0 #=============================================================================== # LOOP record decoding functions #=============================================================================== def genLoopPackets(self): """ Generator function that continuously returns loop packets """ for _packet in self.genPackets(): yield _packet def genPackets(self): """ Generate measurement packets. """ global temp_probe while True: start_time = time.time() while time.time() - start_time <= self.interval: wind_start_time = time.time() self.reset_wind() while time.time() - wind_start_time <= self.wind_interval: self.store_directions.append( wind_direction_byo_5.get_value() ) final_speed = self.calculate_speed( self.wind_interval ) # Add this speed to the list self.store_speeds.append( final_speed ) wind_average = wind_direction_byo_5.get_average( self.store_directions ) self.wind_gust = max( self.store_speeds ) wind_speed = statistics.mean( self.store_speeds ) loginf("calculated wind_speed=%s self.store_speeds=%s" % (wind_speed, self.store_speeds)) # calculate rainfall in cm for weeWX Metric units rainfall = self.rain_count * self.bucket_size / 10.0 self.reset_rainfall() self.store_speeds = [] self.store_directions = [] ground_temp = temp_probe.read_temp() humidity, pressure, ambient_temp = bme280_sensor_2.read_all() # Build the weewx loop packet # set packet units to weewx.METRIC, requires temperature in C, # pressure in hPa, rain in cm and wind speeds in kph packet = { 'dateTime': int( time.time() ), 'usUnits': weewx.METRIC } packet['outTemp'] = float( ambient_temp ) packet['outHumidity'] = float( humidity ) packet['soilTemp1'] = float( ground_temp ) packet['pressure'] = float( pressure ) packet['rain'] = rainfall packet['windDir'] = float( wind_average ) packet['windSpeed'] = float( wind_speed ) packet['windGust'] = float( self.wind_gust ) # Send to the loop yield packet # Delay reading sensors for the interval time? #time.sleep( self.interval )
