MQTT_PORT = 1883

TOPICO = '/softway/iot'

MQTT_TIMEOUT = 60

GPIO.setmode(GPIO.BCM) # Set GPIO pin numbering

TRIG = 23 # Associate pin 23 to TRIG

ECHO = 24 # Associate pin 24 to ECHO

ID_LINE = 1

MQTT_ADDRESS = '10.17.0.2'

GPIO.setup(TRIG, GPIO.OUT) # Set pin as GPIO out

GPIO.setup(ECHO, GPIO.IN) # Set pin as GPIO in

def send_message(msg, MQTT_ADDRESS): # Send MQTT Message

client = mqtt.Client()

client.connect(MQTT_ADDRESS, MQTT_PORT, MQTT_TIMEOUT)

result, mid = client.publish(TOPICO, msg)

print('Mensagem enviada ao canal: %d, [MQTT_ADDRESS: %s]' % (mid, MQTT_ADDRESS))

for numero in range(4):

timeout = 0.8 * 60 * 60 # Horas em segundos (48 min)

timeout_start = time.time()

while time.time() < timeout_start + timeout:

GPIO.output(TRIG, False) # Set TRIG as LOW

time.sleep(2) # Delay of 2 seconds

GPIO.output(TRIG, True) # Set TRIG as HIGH

time.sleep(0.00001) # Delay of 0.00001 seconds

GPIO.output(TRIG, False) # Set TRIG as LOW

while GPIO.input(ECHO) == 0: # Check whether the ECHO is LOW

pulse_start = time.time() # Saves the last known time of LOW pulse

while GPIO.input(ECHO) == 1: # Check whether the ECHO is HIGH

pulse_end = time.time() # Saves the last known time of HIGH pulse

pulse_duration = pulse_end - pulse_start # Get pulse duration to a variable

distance = pulse_duration * 17150 # Multiply pulse duration by 17150 to get distance

distance = round(distance, 2) # Round to two decimal points

if distance > 5:

mensagem = "{\"id\":" + str(ID_LINE) + "}"

print("++ MSG-SEND:", mensagem, "\n")

send_message(mensagem, MQTT_ADDRESS) # Send message via MQTT protocol

time.sleep(0.3)

print("Resetando sensores...")

time.sleep(0.3)

print("Resetando sensores......")

time.sleep(0.4)