Pi In The Sky 4 Sonar Sensors on Pi

import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)

TRIG = 23
ECHO = 24

print "Distance Measurement 1 In Progress"

GPIO.setup(TRIG,GPIO.OUT)
GPIO.setup(ECHO,GPIO.IN)

GPIO.output(TRIG, False)
print "Waiting For Sensor 1 To Settle"
time.sleep(0.5)

GPIO.output(TRIG, True)
time.sleep(0.00001)
GPIO.output(TRIG, False)

while GPIO.input(ECHO)==0:
  pulse_start = time.time()

while GPIO.input(ECHO)==1:
  pulse_end = time.time()

pulse_duration = pulse_end - pulse_start

distance = pulse_duration * 17150

distance = round(distance, 2)

print "Distance:",distance,"cm"


##################################################
TRIG2 = 02
ECHO2 = 03

print "Distance Measurement 2 In Progress"

GPIO.setup(TRIG2,GPIO.OUT)
GPIO.setup(ECHO2,GPIO.IN)

GPIO.output(TRIG2, False)
print "Waiting For Sensor 2 To Settle"
time.sleep(0.5)

GPIO.output(TRIG2, True)
time.sleep(0.00001)
GPIO.output(TRIG2, False)

while GPIO.input(ECHO2)==0:
  pulse_start = time.time()

while GPIO.input(ECHO2)==1:
  pulse_end = time.time()

pulse_duration = pulse_end - pulse_start

distance = pulse_duration * 17150

distance = round(distance, 2)

print "Distance:",distance,"cm"


###################################

TRIG3 = 14
ECHO3 = 15

print "Distance Measurement 3 In Progress"

GPIO.setup(TRIG3,GPIO.OUT)
GPIO.setup(ECHO3,GPIO.IN)

GPIO.output(TRIG3, False)
print "Waiting For Sensor 3 To Settle"
time.sleep(0.5)

GPIO.output(TRIG3, True)
time.sleep(0.00001)
GPIO.output(TRIG3, False)

while GPIO.input(ECHO3)==0:
  pulse_start = time.time()

while GPIO.input(ECHO3)==1:
  pulse_end = time.time()

pulse_duration = pulse_end - pulse_start

distance = pulse_duration * 17150

distance = round(distance, 2)

print "Distance:",distance,"cm"


##############################
TRIG4 = 25
ECHO4 = 8


print "Distance Measurement 4 In Progress"

GPIO.setup(TRIG4,GPIO.OUT)
GPIO.setup(ECHO4,GPIO.IN)

GPIO.output(TRIG4, False)
print "Waiting For Sensor 4 To Settle"
time.sleep(0.5)

GPIO.output(TRIG4, True)
time.sleep(0.00001)
GPIO.output(TRIG4, False)

while GPIO.input(ECHO4)==0:
  pulse_start = time.time()

while GPIO.input(ECHO4)==1:
  pulse_end = time.time()

pulse_duration = pulse_end - pulse_start

distance = pulse_duration * 17150

distance = round(distance, 2)

print "Distance:",distance,"cm"
GPIO.cleanup()