def cloud_data_read(log_msg):
"""
Function name : cloud_data_read
Parameter : log_msg
Functionality : Writes the data into cloud server
Function Invoked : utils.print_msg(), cloud_read()
Return Value : Returns True on Success and False on failure
"""
try:
cloud_read_status, data = \
cloud_read(config.DATA_CHANNEL_ID, config.DATA_CHANNEL_READ_API_KEY)
if cloud_read_status is True:
utils.print_msg(
config.STR_SYMBOL * config.NUMERIC_CONSTANT_FIFTEEN + ' ' +
log_msg + " Intruder Breach Alert Information " +
config.STR_SYMBOL * config.NUMERIC_CONSTANT_FIFTEEN)
intruder_status_msg = data['field1']
utils.print_msg("Intruder status: %s" %
intruder_status_msg) # Either safe or breach
time_stamp = data['field2']
utils.print_msg("Time Intruder detected: %s" % time_stamp)
distance_in_cm = data['field3']
utils.print_msg("Distance Intruder Identified: %s" %
distance_in_cm)
return True
else:
return False
except Exception as e_obj:
utils.print_msg('EXCEPTION: In cloud_data_read(), due to %s' % e_obj)
return False
def system_reset():
try:
cloud.system_reset_status_cloud_data_write(1)
return redirect(url_for('index'))
except Exception as e_obj:
utils.print_msg('EXCEPTION: In system_reset(), due to %s' % e_obj)
return redirect(url_for('index'))
def cloud_read(channel_id, read_api_key):
"""
Function name : cloud_read
Parameter : channel_id, read_api_key
Functionality : Reads the data from the cloud server
Function Invoked : utils.print_msg()
Return Value : Returns True and data on Success,
False and None on failure
"""
conn = None
try:
conn = urllib.urlopen("http://api.thingspeak.com/channels/%s/feeds/"
"last.json?api_key=%s" %
(channel_id, read_api_key))
response = conn.read()
data = json.loads(response)
return True, data
except Exception as e_obj:
utils.print_msg('EXCEPTION: In cloud_read(), due to %s' % e_obj)
return False, None
finally:
conn.close()
def system_reset_status_cloud_data_write(system_reset_status):
"""
Function name : system_reset_status_cloud_data_write
Parameter : system_reset_status
Functionality : Writes the system reset status cloud data server
Function Invoked : utils.print_msg(), cloud_write()
Return Value : Returns True on success, False on failure
"""
try:
cloud_write_status, timestamp = cloud_write(
system_reset_status, config.STR_NONE,
config.SYSTEM_CHANNEL_WRITE_API_KEY, config.STR_SYSTEM)
if cloud_write_status is True:
return True
else:
utils.print_msg('Invalid data provided:'
'\nsystem_reset_status - %s'
'\nsystem_reset_time - %s' %
(system_reset_status, timestamp))
return False
except Exception as e_obj:
utils.print_msg('EXCEPTION: In system_reset_status_cloud_data_write()'
', due to %s' % e_obj)
return False
def cloud_data_write(msg=config.STR_NONE, distance_in_cm=config.STR_NONE):
"""
Function name : cloud_data_write
Parameter : msg, distance_in_cm
Functionality : Writes the data into cloud server
Function Invoked : cloud_write(), utils.print_msg()
Return Value : Returns True on success, False on failure
"""
try:
cloud_write_status, timestamp = cloud_write(
msg, distance_in_cm, config.DATA_CHANNEL_WRITE_API_KEY,
config.STR_DATA)
if cloud_write_status is True:
return True
else:
utils.print_msg('Invalid data provided:'
'\nmsg - %s'
'\ntimestamp - %s'
'\ndistance in cm - %s' %
(msg, timestamp, distance_in_cm))
return False
except Exception as e_obj:
utils.print_msg('EXCEPTION: In cloud_data_write(), due to %s' % e_obj)
return False
def range_finder(range_find):
"""
Function name : range_finder
Functionality : Finds the intruder distance
Function Invoked : print_msg()
Return value : Returns True and distance in cm, otherwise False, None
"""
try:
pulse_start = 0
pulse_end = 0
if range_find is True:
utils.print_msg("Measuring the Intruder distance")
gpio.output(config.ULTRASONIC_SENSOR_TRIGGER_PIN,
False) # Set port/pin value to 0/GPIO.LOW/False
time.sleep(config.NUMERIC_CONSTANT_TWO
) # Waiting time For Sensor To Settle
gpio.output(config.ULTRASONIC_SENSOR_TRIGGER_PIN,
True) # Set port/pin value to 1/GPIO.HIGH/True
time.sleep(config.NUMERIC_CONSTANT_ONE / 10000)
gpio.output(config.ULTRASONIC_SENSOR_TRIGGER_PIN, False)
while gpio.input(config.ULTRASONIC_SENSOR_ECHO_PIN) == \
config.NUMERIC_CONSTANT_ZERO:
pulse_start = time.time()
while gpio.input(config.ULTRASONIC_SENSOR_ECHO_PIN) == \
config.NUMERIC_CONSTANT_ONE:
pulse_end = time.time()
pulse_duration = pulse_end - pulse_start
distance_in_cm = pulse_duration * 17150 # The speed of sound at sea level is 34300 cm/s
# Hence the formula is 34300 * (time/2) = intruder_distance
distance_in_cm = round(distance_in_cm, 2)
utils.print_msg("Distance: %s cm" % distance_in_cm)
return True, distance_in_cm
else:
utils.print_msg('Invalid range find parameter value. '
'Given range_find is %s' % range_find)
return False, None
except Exception as e_obj:
utils.print_msg('EXCEPTION: In range_finder(), due to %s' % e_obj)
return False, None
def cloud_write(msg_or_system_reset_status, distance_in_cm, write_api_key,
signal):
"""
Function name : cloud_write
Parameter : msg_or_system_reset_status, distance_in_cm,
write_api_key, signal
Functionality : Writes the data into cloud server
Function Invoked : utils.print_msg()
Return Value : Returns True and timestamp on success,
False and None on failure
"""
conn = None
try:
timestamp = datetime.datetime.now()
if str(signal).upper() == config.STR_DATA:
params = urllib.urlencode({
'field1': str(msg_or_system_reset_status),
'field2': str(timestamp),
'field3': str(distance_in_cm),
'key': write_api_key
})
else:
params = urllib.urlencode({
'field1': str(msg_or_system_reset_status),
'field2': str(timestamp),
'key': write_api_key
})
headers = {
"Content-type": "application/x-www-form-urlencoded",
"Accept": "text/plain"
}
conn = httplib.HTTPConnection("api.thingspeak.com:80")
conn.request("POST", "/update", params, headers)
utils.print_msg('Writing the data into cloud....')
time.sleep(30)
utils.print_msg('Data written to the cloud successful')
return True, timestamp
except Exception as e_obj:
utils.print_msg('EXCEPTION: In cloud_write(), due to %s' % e_obj)
return False, None
finally:
conn.close()
def index():
try:
temp_last_distance_data = 0
while True:
cloud_read_status, data = \
cloud.cloud_read(config.DATA_CHANNEL_ID,
config.DATA_CHANNEL_READ_API_KEY)
if cloud_read_status is True:
utils.print_msg(data)
system_cloud_read_status, system_data = \
cloud.cloud_read(config.SYSTEM_CHANNEL_ID,
config.SYSTEM_CHANNEL_READ_API_KEY)
if system_cloud_read_status is True:
utils.print_msg(data)
if temp_last_distance_data != data['field3']:
return render_template('home.html',
data_value=data,
system_value=system_data)
else:
return redirect(url_for('index'))
except Exception as e_obj:
utils.print_msg('EXCEPTION: In index(), due to %s' % e_obj)
return redirect(url_for('index'))
def system_reset_status_cloud_data_read():
"""
Function name : system_reset_status_cloud_data_read
Parameter : None
Functionality : Reads the system reset status cloud data server
Return Value : Returns system_reset_status on success, False on failure
"""
try:
cloud_read_status, data = \
cloud_read(config.SYSTEM_CHANNEL_ID,
config.SYSTEM_CHANNEL_READ_API_KEY)
if cloud_read_status is True:
utils.print_msg(
config.STR_SYMBOL * config.NUMERIC_CONSTANT_FIFTEEN +
" Intruder Alert System Reset Status " +
config.STR_SYMBOL * config.NUMERIC_CONSTANT_FIFTEEN)
system_reset_status = data['field1']
if config.NUMERIC_CONSTANT_ONE == int(system_reset_status):
system_reset_string = config.STR_ON
else:
system_reset_string = config.STR_OFF
utils.print_msg("System reset status: %s" %
system_reset_string) # If value is 1, do reset
last_system_reset_time = data['field2']
utils.print_msg("Last System reset time: %s" %
last_system_reset_time)
if config.STR_ON.lower() == str(system_reset_string).lower():
utils.print_msg("Updating the reset system information into"
" cloud server")
time.sleep(15)
system_reset_status_check = \
system_reset_status_cloud_data_write(0)
if system_reset_status_check is False:
return False
utils.print_msg(config.STR_SYMBOL_STAR *
config.NUMERIC_CONSTANT_EIGHTY)
return int(system_reset_status)
else:
return False
except Exception as e_obj:
utils.print_msg('EXCEPTION: In system_reset_status_cloud_data_read(), '
'due to %s' % e_obj)
return False
def main_execution():
"""
Function name : main_execution
Functionality : Checks the Intruder alert and finds its distance in cm
Function Invoked : print_msg(), range_finder()
Return value : None
"""
utils.print_msg('*' * config.NUMERIC_CONSTANT_SIXTY)
utils.print_msg('\t\t\t\tIntruder Alert System')
utils.print_msg('*' * config.NUMERIC_CONSTANT_SIXTY)
try:
area_safe_count = config.NUMERIC_CONSTANT_ZERO
while True:
pir_sensor_digital_data = gpio.\
input(config.PIR_SENSOR_DIGITAL_OUTPUT_PIN)
if config.NUMERIC_CONSTANT_ONE == int(
pir_sensor_digital_data
): # Compare dynamic value with constants
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg("\tBreach Alert by Intruder")
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
gpio.output(config.LED_PIN, gpio.HIGH)
utils.print_msg('LED Status: ON')
utils.print_msg('Current Intruder status: %s' %
config.STR_BREACH)
distance_in_cm, range_find_status = \
range_finder(BOOLEAN_RANGE_FINDER)
cloud_write_status = cloud.cloud_data_write(
config.STR_BREACH, str(distance_in_cm))
cloud_read_status = cloud.cloud_data_read(config.STR_RECENT)
area_safe_count = config.NUMERIC_CONSTANT_ZERO
elif (config.NUMERIC_CONSTANT_ZERO == int(pir_sensor_digital_data))\
and area_safe_count == 0:
area_safe_count = config.NUMERIC_CONSTANT_ONE
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg("\tArea Under Safe")
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg('LED Status: OFF')
utils.print_msg('Current Intruder status: %s' %
config.STR_SAFE)
gpio.output(config.LED_PIN, gpio.LOW)
cloud_write_status = cloud.\
cloud_data_write(config.STR_SAFE,
str(config.NUMERIC_CONSTANT_ZERO))
cloud_read_status = cloud.cloud_data_read(config.STR_LAST)
system_rest_status_check = \
cloud.system_reset_status_cloud_data_read()
if config.NUMERIC_CONSTANT_ONE == system_rest_status_check:
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg("Intruder Alert System Force Restart")
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg(
"Updating the reset data information into cloud"
" server")
cloud.cloud_data_write(config.STR_SAFE,
config.NUMERIC_CONSTANT_ZERO)
gpio.output(config.LED_PIN, gpio.LOW)
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg("System force reset")
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg('LED Status: OFF')
utils.print_msg('Current Intruder status: %s' %
config.STR_SAFE)
utils.print_msg(config.STR_SYMBOL_STAR *
config.NUMERIC_CONSTANT_EIGHTY)
time.sleep(config.NUMERIC_CONSTANT_TEN
) # Loop iterates once in every 10 seconds
except Exception as e_obj:
utils.print_msg('EXCEPTION: In main_execution(), due to %s' % e_obj)
finally:
gpio.cleanup()
"Updating the reset data information into cloud"
" server")
cloud.cloud_data_write(config.STR_SAFE,
config.NUMERIC_CONSTANT_ZERO)
gpio.output(config.LED_PIN, gpio.LOW)
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg("System force reset")
utils.print_msg(config.STR_SYMBOL *
config.NUMERIC_CONSTANT_THIRTY)
utils.print_msg('LED Status: OFF')
utils.print_msg('Current Intruder status: %s' %
config.STR_SAFE)
utils.print_msg(config.STR_SYMBOL_STAR *
config.NUMERIC_CONSTANT_EIGHTY)
time.sleep(config.NUMERIC_CONSTANT_TEN
) # Loop iterates once in every 10 seconds
except Exception as e_obj:
utils.print_msg('EXCEPTION: In main_execution(), due to %s' % e_obj)
finally:
gpio.cleanup()
# Execution begins here
if __name__ == '__main__':
try:
main_execution()
except Exception as e_obj:
utils.print_msg('EXCEPTION: Fail to start the intruder alert '
'system. Due to %s' % e_obj)