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#!/usr/bin/env python
# This code is written by Stephen C Phillips.
# It is in the public domain, so you can do what you like with it
# but a link to http://scphillips.com would be nice.
import socket
import re
from datetime import datetime
import pygame
import argparse
import RPi.GPIO as GPIO
from Stepper import Motor
# CONFIGURATION BEGINS ########################################
# Set up stepper-motor:
GPIO.setmode(GPIO.BOARD)
motor = Motor([18,22,24,26])
motor.rpm = 5
# Set up the clock locations:
location = {
'home': 0,
'woodcraft': 45, # A cooperative childrens' organisation, see http://woodcraft.org
'work': 90,
'pub': 135, # this is more of an aspiration than a location
'salsa': 180,
'pilates': 225,
'travelling': 270,
'mortalperil': 315, # traditionally must be included
}
# Port for the web server to run on
port = 4387
# Sound file to play when the hand moves
sound_file = '/usr/share/scratch/Media/Sounds/Effects/BellToll.wav'
# CONFIGURATION ENDS ############################################
# Standard socket stuff:
host = '' # do we need socket.gethostname() ?
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind((host, port))
sock.listen(1) # don't queue up any requests, this is not a high traffic web service...
# pygame things for sound
pygame.init()
sound = pygame.mixer.Sound(sound_file)
print "Server running on port " + `port`
# Loop forever, listening for requests:
while True:
print "Waiting..."
csock, caddr = sock.accept()
print datetime.today()
print "Connection from: " + `caddr`
req = csock.recv(1024) # get the request, 1kB max
req = req.split("\n")[0]
print "Request: " + req
# Look in the first line of the request for a move command
# A move command should be e.g. 'http://server/move?a=90'
match_angle = re.match('GET /move\?a=(\d+)\sHTTP/1', req)
match_location = re.match('GET /move\?l=(\w+)\sHTTP/1', req)
if match_angle:
angle = int(match_angle.group(1))
print "Angle: " + `angle`
csock.sendall("HTTP/1.0 200 OK\r\n\r\n")
print "Moving motor..."
motor.move_to(angle)
elif match_location:
loc = match_location.group(1)
try:
print "Location: " + loc
angle = location[loc]
print "Angle: " + `angle`
csock.sendall("HTTP/1.0 200 OK\r\n\r\n")
print "Moving motor..."
sound.play()
motor.move_to(angle)
except KeyError:
print "Location " + loc + " is unknown, returning 501"
csock.sendall("HTTP/1.0 501 Not Implemented\r\n\r\n")
else:
# If there was no recognised command then return a 404 (page not found)
print "Returning 404"
csock.sendall("HTTP/1.0 404 Not Found\r\n\r\n")
csock.close()
print "--------"
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