Notes

import RPi.GPIO as GPIO #Import GPIO library
import time #Import time library
GPIO.setmode(GPIO.BCM)
def ultrasonic():
#GPIO.setmode(GPIO.BCM) #Set GPIO pin numbering

TRIG1 = 06 #Associate pin 23 to TRIG
ECHO1 = 19 #Associate pin 24 to ECHO
TRIG2 = 13 #Associate pin 23 to TRIG
ECHO2 = 26 #Associate pin 24 to ECHO

print "Distance measurement in progress"

GPIO.setup(TRIG1,GPIO.OUT) #Set pin as GPIO out
GPIO.setup(ECHO1,GPIO.IN) #Set pin as GPIO in
GPIO.setup(TRIG2,GPIO.OUT) #Set pin as GPIO out
GPIO.setup(ECHO2,GPIO.IN) #Set pin as GPIO in

#while True:
GPIO.output(TRIG1, False) #Set TRIG as LOW
GPIO.output(TRIG2, False) #Set TRIG as LOW
print "Waitng For Sensor To Settle"
time.sleep(1) #Delay of 2 seconds

GPIO.output(TRIG1, True) #Set TRIG as HIGH
GPIO.output(TRIG2, True) #Set TRIG as HIGH
time.sleep(0.00001) #Delay of 0.00001 seconds
GPIO.output(TRIG1, False) #Set TRIG as LOW
GPIO.output(TRIG2, False) #Set TRIG as LOW
start1 = time.time()
start2 = time.time()
while GPIO.input(ECHO1)==0: #Check whether the ECHO is LOW
start1 = time.time() #Saves the last known time of LOW pulse

while GPIO.input(ECHO2)==0: #Check whether the ECHO is HIGH
start2 = time.time() #Saves the last known time of HIGH pul$

while GPIO.input(ECHO1)==1 or GPIO.input(ECHO2)==1:
if GPIO.input(ECHO1)==1:
end1 = time.time() #Saves the last known time of LOW pulse
if GPIO.input(ECHO2)==1:
end2 = time.time()
# while GPIO.input(ECHO2)==1: #Check whether the ECHO is HIGH
#end2 = time.time() #Saves the last known time of HIGH puls$

duration1 = end1 - start1 #Get pulse duration to a variable
duration2 = end2 - start2 #Get pulse duration to a variable

distance1 = duration1 * 17150 #Multiply pulse duration by 17150 to get $
distance1 = round(distance1, 2) #Round to two decimal points
distance2 = duration2 * 17150 #Multiply pulse duration by 17150 to get $
distance2 = round(distance2, 2) #Round to two decimal points

if distance1 > 2 and distance1 < 400: #Check whether the distance is with$
print "Distance1:",distance1 - 0.5,"cm" #Print distance with 0.5 cm calib$
else:
print "Out Of Range" #display out of range

if distance2 > 2 and distance2 < 400: #Check whether the distance is with$
print "Distance2:",distance2 - 0.5-8,"cm" #Print distance with 0.5 cm cal$
else:
print "Out Of Range" #display out of range
value=distance1-distance2
return value

def piezometer():
PiPin = 05
print "starting Piezometer"
GPIO.setup(PiPin, GPIO.OUT)
GPIO.output(PiPin, GPIO.LOW)
time.sleep(0.1)
value=0
i=0
GPIO.setup(PiPin, GPIO.IN)
while True:
if (GPIO.input(PiPin)==GPIO.HIGH):
value=1
i=i+1
if i==100000:

return value

def main():
value1=ultrasonic()
print "Difference in distance", value1
value2=piezometer()
print "Pressure Sensor", value2
if (value1>40 and value2 == 0)


while True:
main()