clie_v3.py

from picamera import PiCamera
import logging
import ntplib
from time import ctime
import time
from datetime import datetime
import socket,datetime
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)

GPIO.setup(24, GPIO.IN, pull_up_down=GPIO.PUD_UP)
def my_callback(channel):
    print "falling edge detected on 24"
    # Create a datagram socket
    tempSensorSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM);
    # Socket is not in connected state yet...sendto() can be used
    # Send temperature to the server
    now = str(time.clock_gettime(time.CLOCK_REALTIME)+2)
    then = str(time.clock_gettime(time.CLOCK_REALTIME)+2)
    print(now)
    tempSensorSocket.sendto(then.encode(), serverAddress);
    # Read UDP server's response datagram
    response = tempSensorSocket.recv(1024);
    print(response);
    while now < then:
        now = str(time.clock_gettime(time.CLOCK_REALTIME)+1)
    print("Client takes picture at: ",now)
    frame=(time.strftime("_%y-%b-%d-%H:%M:%S"))
    camera.capture("/home/pi/Desktop/"+"client" + frame + ".jpg")

GPIO.add_event_detect(24, GPIO.FALLING, callback=my_callback, bouncetime=300)
camera = PiCamera()
camera.start_preview()
# Get temperature
#def getTemp():
#    temp = random.uniform(60.0, 62.0);
#    return temp;
# A tuple with server ip and port
serverAddress = ("192.168.1.13", 7070);

class NtpException(Exception):
    pass
class keyboardInterrupt(Exception):
    pass

def SyncClockToNtp():
  """Syncs the hardware clock to an NTP server."""
  server = 'europe.pool.ntp.org'
  retries = 2
  RETRY_DELAY=5
  logging.info('Reading time from NTP server %s.', server)

  attempts = 0
  client = ntplib.NTPClient()
  response = None

  while True:
    try:
      response = client.request(server, version=3)
    except (ntplib.NTPException, socket.gaierror) as e:
      logging.error('NTP client request error: %s', str(e))
    if response or attempts >= retries:
      break
    logging.info(
        'Unable to contact NTP server %s to sync machine clock.  This '
        'machine may not have an IP address yet; waiting %d seconds and '
        'trying again. Repeated failure may indicate network or driver '
        'problems.', server, RETRY_DELAY)
    time.sleep(RETRY_DELAY)
    attempts += 1

  if not response:
    raise NtpException('No response from NTP server.')

  now = time.clock_gettime(time.CLOCK_REALTIME)
  print("old time:",ctime(now))

  #print("Offset",response.offset)
  print("tx_time",ctime(response.tx_time))
  #print(response.tx_time)
  time.clock_settime(time.CLOCK_REALTIME, (response.tx_time))
  now = time.clock_gettime(time.CLOCK_REALTIME)
  print("Updated time:",ctime(now))


if __name__=='__main__':
    try:
        SyncClockToNtp()
    except NtpException:
        print("No response from NTP server. Please check your internet connection")
    try:
        while True:

            time.sleep(5)
    except keyboardInterrupt:
        print("Exiting Nicely")
        camera.stop_preview()