Read from PYWWS Weather raw file and display the wind speed as a range of LEDs on the GertBoard

gertboard-wind-led.py

#!/usr/bin/env python2.7
# Python to read pywws raw weather-file and output windspeed
# To the GertBoard LED's based on strength
 
from collections import deque
import csv
import wiringpi
from time import sleep
import sys
import math
import time
import logging
 
logging.basicConfig(format='%(asctime)s %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p', filename='gertweather.log',level=logging.DEBUG)
board_type = sys.argv[-1]
 
# pywws puts the raw files in sub-folders by year, then year and month, then the file
# is year, month and day
# This section takes the current date and oyts this into the filename string for the script
folder = time.strftime("%Y/%Y-%m")
file = time.strftime("%Y-%m-%d.txt")
filename = '/home/pi/weather/data/raw/' + folder + '/' + file
 
def pi_rev_check():      # Function checks which Pi Board revision we have
    # make a dictionary of known Pi board revision IDs
    rev_dict={'0002':1,'0003':1,'0004':2,'0005':2,'0006':2,'000f':2}
 
    # search the cpuinfo file to get the board revision ID
    revcheck = open('/proc/cpuinfo')
    cpuinfo = revcheck.readlines()
    revcheck.close()
 
    # put Revision ID line in a variable called matching
    matching = [s for s in cpuinfo if "Revision" in s]
 
    # extract the last four useful characters containing Rev ID
    rev_num = str(matching[-1])[-5:-1]
 
    # look up rev_num in our dictionary and set board_rev (-1 if not found)
    board_rev = rev_dict.get(rev_num, -1)
    return board_rev
 
board_revision = pi_rev_check() # check Pi Revision to set port 21/27 correctly
if board_revision == 1:
    # define ports list Rev 1
    ports = [25, 24, 23, 22, 21, 18, 17, 11, 10, 9, 8, 7]
else:
    # define ports list all others
    ports = [25, 24, 23, 22, 27, 18, 17, 11, 10, 9, 8, 7]
 
# make a copy of ports list and then reverse it as we need both directions
ports_rev = ports[:]
ports_rev.reverse()
 
wiringpi.wiringPiSetupGpio()                        # initialise wiringpi
 
for port_num in ports:
    wiringpi.pinMode(port_num, 1)                   # set up ports for output
 
def reset_ports():
    for port_num in ports:
        wiringpi.digitalWrite(port_num, 0)          # switches off all LEDs
        wiringpi.pinMode(port_num, 0)               # and reset ports
 
def led_drive(reps, multiple, direction):           # define function to drive
    for i in range(reps):                      # repetitions, single or multiple
        for port_num in direction:                  # and direction
            wiringpi.digitalWrite(port_num, 1)      # switch on an led
            sleep(0.11)                             # wait for ~0.11 seconds
            if not multiple:                        # if we're not leaving it on
                wiringpi.digitalWrite(port_num, 0)  # switch it off again
 
def get_last_row(csv_filename):
    with open(csv_filename, 'rb') as f:
        return deque(csv.reader(f), 1)[0]
 
#Put the results into a list array
weather = get_last_row(filename)
#Wind speed is 9th (so 8th as we count from zero
wind = weather[8]
windspeed = float(wind) # store the windspeed as a float
flatwindspeed = round(windspeed ,0) # round windspeed to an int
#turn off any lights that are currently on
wiringpi.digitalWrite(17, 0)
wiringpi.digitalWrite(18, 0)
wiringpi.digitalWrite(27, 0)
wiringpi.digitalWrite(22, 0)
wiringpi.digitalWrite(23, 0)
wiringpi.digitalWrite(24, 0)
wiringpi.digitalWrite(25, 0)
wiringpi.digitalWrite(4, 0)
wiringpi.digitalWrite(7, 0)
wiringpi.digitalWrite(8, 0)
wiringpi.digitalWrite(9, 0)
wiringpi.digitalWrite(10, 0)
 
#Turn them on based on the wind speed range
try:
   if windspeed <= 2:       
      logging.debug('slow wind - 1 led')       
      wiringpi.digitalWrite(25, 1) # turn on LED 1    
    elif windspeed >= 6 or windspeed <= 20:       
      logging.debug('mild wind - 3 leds')       
      wiringpi.digitalWrite(25, 1) # turn on LED 1       
      wiringpi.digitalWrite(24, 1) # turn on LED 2       
      wiringpi.digitalWrite(23, 1) # turn on LED 3    
    elif windspeed >= 21 or windspeed <= 50:       
      logging.debug('strong wind - 6 leds')       
      wiringpi.digitalWrite(25, 1) # turn on LED 1       
      wiringpi.digitalWrite(24, 1) # turn on LED 2       
      wiringpi.digitalWrite(23, 1) # turn on LED 3       
      wiringpi.digitalWrite(22, 1) # turn on LED 4       
      wiringpi.digitalWrite(21, 1) # turn on LED 5       
      wiringpi.digitalWrite(18, 1) # turn on LED 6    
    elif windspeed >= 51:
      logging.debug('galefoce or stonger - 12 leds')
      wiringpi.digitalWrite(25, 1) # turn on LED 1
      wiringpi.digitalWrite(24, 1) # turn on LED 2
      wiringpi.digitalWrite(23, 1) # turn on LED 3
      wiringpi.digitalWrite(22, 1) # turn on LED 4
      wiringpi.digitalWrite(21, 1) # turn on LED 5
      wiringpi.digitalWrite(18, 1) # turn on LED 6
      wiringpi.digitalWrite(17, 1) # turn on LED 7
      wiringpi.digitalWrite(11, 1) # turn on LED 8
      wiringpi.digitalWrite(10, 1) # turn on LED 9
      wiringpi.digitalWrite(9, 1) # turn on LED 10
      wiringpi.digitalWrite(8, 1) # turn on LED 11
      wiringpi.digitalWrite(7, 1) # turn on LED 12
except KeyboardInterrupt:           # trap a CTRL+C keyboard interrupt
    reset_ports()                   # reset ports on CTRL-C exit

Jumper cables where installed incorrectly for the previous code. Changed the ports in this version.