Buenas noches amigos, llevo tiempo utilizando esta pagina para resolver mis dudas sobre php, creación de webs, etc la verdad es que es utilisima!!

Me ha surgido una duda hoy mientras trataba de ejecutar un comando python en mi web de seguridad casera. El tema es el siguiente, tengo un script pi_garage_alert.py que chequea cambios en mis puertos gpio y cuando hay un cambio lanza intentofoto.py. Intentofoto.py hace 4 fotos, envía un mail, sube las fotos a dropbox y borra una carpeta.

Cuando ejecuto en mi web boton.php (si lo asocio a pi_garage_alert.py no hace nada) si lo asocio a intentofoto.py lo único que hace es que enviar el mail, sin hacer caso a las demás ordenes. Aquí os dejo el código, tanto para que lo utiliceis como por si algún alma caritativa me puede ayudar.

El objetivo final de esto es crear un botón que active y desactive mi alarma (intentofoto.py)

intentofoto.py

#!/usr/bin/env python
 
import time
import os
import sys
import re
import subprocess
import datetime
import smtplib
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.Utils import COMMASPACE, formatdate
from email import Encoders
 
###### CAPTURA DE IMAGENES############
 
SnapImage = "/var/www/fotospuerta/" + datetime.datetime.now().strftime("%d-%m-%Y_%H:%M:%S:%f") + ".jpg"
subprocess.call(["/usr/bin/wget","-O",SnapImage,"http://melanoma.no-ip.biz:9000/?action=snapshot"])
 
SnapImage = "/var/www/fotospuerta/" + datetime.datetime.now().strftime("%d-%m-%Y_%H:%M:%S:%f") + ".jpg"
subprocess.call(["/usr/bin/wget","-O",SnapImage,"http://melanoma.no-ip.biz:9000/?action=snapshot"])
 
SnapImage = "/var/www/fotospuerta/" + datetime.datetime.now().strftime("%d-%m-%Y_%H:%M:%S:%f") + ".jpg"
subprocess.call(["/usr/bin/wget","-O",SnapImage,"http://melanoma.no-ip.biz:9000/?action=snapshot"])
 
SnapImage = "/var/www/fotospuerta/" + datetime.datetime.now().strftime("%d-%m-%Y_%H:%M:%S:%f") + ".jpg"
subprocess.call(["/usr/bin/wget","-O",SnapImage,"http://melanoma.no-ip.biz:9000/?action=snapshot"])
 
#######ENVIO DE EMAILS#########
 
def sendMail(to, fro, subject, text, files=[],server="localhost"):
    assert type(to)==list
    assert type(files)==list
 
 
    msg = MIMEMultipart()
    msg['From'] = fro
    msg['To'] = COMMASPACE.join(to)
    msg['Date'] = formatdate(localtime=True)
    msg['Subject'] = subject
 
    msg.attach( MIMEText(text) )
 
    for file in files:
        part = MIMEBase('application', "octet-stream")
        part.set_payload( open(file,"rb").read() )
        Encoders.encode_base64(part)
        part.add_header('Content-Disposition', 'attachment; filename="%s"'
                       % os.path.basename(file))
        msg.attach(part)
 
    smtp = smtplib.SMTP(server)
    smtp.sendmail(fro, to, msg.as_string() )
    smtp.close()
 
sendMail(['<laplazaproducciones@gmail.com>'],'phpGeek <laplazaproducciones@gmail.com>','Alerta','La puerta de la calle ha sido abierta')
 
####### SUBIDA DE IMAGENES#############
 
os.system("/home/pi/Dropbox-Uploader/dropbox_uploader.sh -s upload /var/www/fotospuerta/ /")
os.system("rm -f /var/www/fotospuerta/*")
 
#time.sleep(1)

pi_garage_alert.py

#!/usr/bin/python2.7
 
import RPi.GPIO as GPIO
import time
import subprocess
import re
import sys
import logging
import smtplib
import os
import httplib2
from sleekxmpp.xmlstream import resolver, cert
import ssl
import traceback
 
from time import strftime
from datetime import timedelta
 
sys.path.append('/usr/local/etc')
import pi_garage_alert_config as cfg
 
##############################################################################
# Sensor support
##############################################################################
 
def get_garage_door_state(pin):
    """Returns the state of the garage door on the specified pin as a string
 
    Args:
        pin: GPIO pin number.
    """
    if GPIO.input(pin):
        state = 'open'
    else:
        state = 'closed'
 
    return state
 
def get_uptime():
    """Returns the uptime of the RPi as a string
    """
    with open('/proc/uptime', 'r') as uptime_file:
        uptime_seconds = int(float(uptime_file.readline().split()[0]))
        uptime_string = str(timedelta(seconds=uptime_seconds))
    return uptime_string
 
def get_gpu_temp():
    """Return the GPU temperature as a Celsius float
    """
    cmd = ['vcgencmd', 'measure_temp']
 
    measure_temp_proc = subprocess.Popen(cmd, stdout=subprocess.PIPE)
    output = measure_temp_proc.communicate()[0]
 
    gpu_temp = 'unknown'
    gpu_search = re.search('([0-9.]+)', output)
 
    if gpu_search:
        gpu_temp = gpu_search.group(1)
 
    return float(gpu_temp)
 
def get_cpu_temp():
    """Return the CPU temperature as a Celsius float
    """
    cpu_temp = 'unknown'
    with open("/sys/class/thermal/thermal_zone0/temp", "r") as temp_file:
        cpu_temp = float(temp_file.read()) / 1000.0
 
    return cpu_temp
 
def rpi_status():
    """Return string summarizing RPi status
    """
    return "Temperatura CPU: %.1f, Temperatura GPU: %.1f, Tiempo Encendido Pi: %s" % (get_gpu_temp(), get_cpu_temp(), get_uptime())
 
##############################################################################
# Logging and alerts
##############################################################################
 
def send_alerts(logger, alert_senders, recipients, subject, msg):
    """Send subject and msg to specified recipients
 
    Args:
        recipients: An array of strings of the form type:address
        subject: Subject of the alert
        msg: Body of the alert
    """
    for recipient in recipients:
        if recipient[:6] == 'email:':
            alert_senders['Email'].send_email(recipient[6:], subject, msg)
        else:
            logger.error("Unrecognized recipient type: %s", recipient)
 
##############################################################################
# Misc support
##############################################################################
 
def truncate(input_str, length):
    """Truncate string to specified length
 
    Args:
        input_str: String to truncate
        length: Maximum length of output string
    """
    if len(input_str) < (length - 3):
        return input_str
 
    return input_str[:(length - 3)] + '...'
 
def format_duration(duration_sec):
    """Format a duration into a human friendly string"""
    days, remainder = divmod(duration_sec, 86400)
    hours, remainder = divmod(remainder, 3600)
    minutes, seconds = divmod(remainder, 60)
 
    ret = ''
    if days > 1:
        ret += "%d days " % (days)
    elif days == 1:
        ret += "%d day " % (days)
 
    if hours > 1:
        ret += "%d hours " % (hours)
    elif hours == 1:
        ret += "%d hour " % (hours)
 
    if minutes > 1:
        ret += "%d minutes" % (minutes)
    if minutes == 1:
        ret += "%d minute" % (minutes)
 
    if ret == '':
        ret += "%d seconds" % (seconds)
 
    return ret
 
 
##############################################################################
# Main functionality
##############################################################################
class PiGarageAlert(object):
    """Class with main function of Pi Garage Alert"""
 
    def __init__(self):
        self.logger = logging.getLogger(__name__)
 
    def main(self):
        """Main functionality
        """
 
        try:
            # Set up logging
            log_fmt = '%(asctime)-15s %(levelname)-8s %(message)s'
            log_level = logging.INFO
 
            if sys.stdout.isatty():
                # Connected to a real terminal - log to stdout
                logging.basicConfig(format=log_fmt, level=log_level)
            else:
                # Background mode - log to file
                logging.basicConfig(format=log_fmt, level=log_level, filename=cfg.LOG_FILENAME)
 
            # Banner
            self.logger.info("==========================================================")
            self.logger.info("Encendiendo Alarma de la Puerta de Entrada")
 
            # Use Raspberry Pi board pin numbers
            self.logger.info("Configurando Ajustes Globales")
            GPIO.setmode(GPIO.BOARD)
 
            # Configure the sensor pins as inputs with pull up resistors
            for door in cfg.GARAGE_DOORS:
                self.logger.info("Configurando pin %d para \"%s\"", door['pin'], door['name'])
                GPIO.setup(door['pin'], GPIO.IN, pull_up_down=GPIO.PUD_UP)
 
            # Last state of each garage door
            door_states = dict()
 
            # time.time() of the last time the garage door changed state
            time_of_last_state_change = dict()
 
            # Index of the next alert to send for each garage door
            alert_states = dict()
 
 
            # Read initial states
            for door in cfg.GARAGE_DOORS:
                name = door['name']
                state = get_garage_door_state(door['pin'])
 
                door_states[name] = state
                time_of_last_state_change[name] = time.time()
                alert_states[name] = 0
 
                self.logger.info("Estado Inicial de \"%s\" es %s", name, state)
 
            status_report_countdown = 5
            while True:
                for door in cfg.GARAGE_DOORS:
                    name = door['name']
                    state = get_garage_door_state(door['pin'])
                    time_in_state = time.time() - time_of_last_state_change[name]
 
                    # Check if the door has changed state
                    if door_states[name] != state:
                        door_states[name] = state
                        time_of_last_state_change[name] = time.time()
                        self.logger.info("Estado de \"%s\" ha cambiado a %s despues de %.0f sec", name, state, time_in_state)
 
	#if state == 'open':
			os.system("python /home/pi/python/intentofoto.py")
			#os.system("/home/pi/Dropbox-Uploader/dropbox_uploader.sh -s upload /var/www/fotospuerta/ /")
			#os.system("rm -f /var/www/fotospuerta/*")
 
 
                        # Reset alert when door changes state
                        if alert_states[name] > 0:
                            # Use the recipients of the last alert
                            recipients = door['alerts'][alert_states[name] - 1]['recipients']
                            send_alerts(self.logger, alert_senders, recipients, name, "%s esta ahora %s" % (name, state))
                            alert_states[name] = 0
 
                        # Reset time_in_state
                        time_in_state = 0
 
                    # See if there are more alerts
                    if len(door['alerts']) > alert_states[name]:
                        # Get info about alert
                        alert = door['alerts'][alert_states[name]]
 
                        # Has the time elapsed and is this the state to trigger the alert?
                        if time_in_state > alert['time'] and state == alert['state']:
                            send_alerts(self.logger, alert_senders, alert['recipients'], name, "%s ha sido %s %d seconds!" % (name, state, time_in_state))
                            alert_states[name] += 1
 
                # Periodically log the status for debug and ensuring RPi doesn't get too hot
                status_report_countdown -= 1
                if status_report_countdown <= 0:
                    status_msg = rpi_status()
 
                    for name in door_states:
                        status_msg += ", %s: %s/%d/%d" % (name, door_states[name], alert_states[name], (time.time() - time_of_last_state_change[name]))
 
                    self.logger.info(status_msg)
 
                    status_report_countdown = 600
 
                # Poll every 1 second
                time.sleep(1)
        except KeyboardInterrupt:
            logging.critical("Terminating due to keyboard interrupt")
        except:
            logging.critical("Terminating due to unexpected error: %s", sys.exc_info()[0])
            logging.critical("%s", traceback.format_exc())
 
        GPIO.cleanup()
 
if __name__ == "__main__":
    PiGarageAlert().main()

boton.php

<?php 
 
$command = escapeshellcmd('/var/www/pi_garage_alert.py');
$output = shell_exec($command);
echo $output;
 
?>

MUCHAS GRACIAS DE ANTEMANO Y LO SIENTO SI ES MUY LARGO!!