Domoticz

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import time
import RPi.GPIO as GPIO
import urllib2
import urllib
import json

def log_waterlevel(distance):
    
    conn=sqlite3.connect("distance.db")
    curs=conn.cursor()

    curs.execute("INSERT INTO volume values(datetime('now'), (?))", (distance,))

    #commit the changes
    conn.commit()
    conn.close()
    
def measure():
  # This function measures a distance

  GPIO.output(GPIO_TRIGGER, True)
  time.sleep(0.00001)
  GPIO.output(GPIO_TRIGGER, False)
  start = time.time()
  
  while GPIO.input(GPIO_ECHO)==0:
    start = time.time()

  while GPIO.input(GPIO_ECHO)==1:
    stop = time.time()

  elapsed = stop-start
  distance = 1000-(elapsed * 34300)/2*10
  return distance

def measure_average():
  # This function takes 3 measurements and
  # returns the average.

  distance1=measure()
  time.sleep(0.1)
  distance2=measure()
  time.sleep(0.1)
  distance3=measure()
  distance = distance1 + distance2 + distance3
  distance = distance / 3
  round(distance,0)
  return distance

# -----------------------
# Main Script
# -----------------------

# Use BCM GPIO references
# instead of physical pin numbers
GPIO.setmode(GPIO.BCM)

# Define GPIO to use on Pi
GPIO_TRIGGER = 24
GPIO_ECHO    = 23

print "Ultrasonic Measurement"

# Set pins as output and input
GPIO.setup(GPIO_TRIGGER,GPIO.OUT)  # Trigger
GPIO.setup(GPIO_ECHO,GPIO.IN)      # Echo

# Set trigger to False (Low)
GPIO.output(GPIO_TRIGGER, False)

# Wrap main content in a try block so we can
# catch the user pressing CTRL-C and run the
# GPIO cleanup function. This will also prevent
# the user seeing lots of unnecessary error
# messages.
distance = measure_average()
if distance > 0:

url = 'http://192.168.0.33:8080/json.htm?type=command&param=udevice&idx=15&nvalue=0&svalue='+str(round(distance,-1))
username = '<USERNAME>'
password = '<PASSWORD>'
p = urllib2.HTTPPasswordMgrWithDefaultRealm()
p.add_password(None, url, username, password)
handler = urllib2.HTTPBasicAuthHandler(p)
opener = urllib2.build_opener(handler)
urllib2.install_opener(opener)

page = urllib2.urlopen(url).read()

print distance
print page
else: print"Not working"    

GPIO.cleanup()

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# Might as well set everything we know about the tank here
tank_height = 50
tank_length = 200
tank_width = 100
tank_capacity = 1000

def get_water_height():
    # Returns how high the water is in the tank
    air_space = measure()
    water_level = tank_height - air_space
    print "Water level is ", water_level, " cm"
    return water_level

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water_litres_remaining = tank_capacity * (water_level / tank_height)
print "There is {} litres of water in the tank".format(water_litres_remaining)

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percent_full = (oil_level / oil_tank_height) * 100
print "Oil tank is {}% full".format(percent_full)

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*** signal_start = 2249224, signal_end = 2280690
signal_len = 31466,  pulses = 1
Distance coding: Pulse length 11465

Short distance: 1000000, long distance: 0, packet distance: 0

p_limit: 11465
bitbuffer:: Number of rows: 0

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*** signal_start = 32841209, signal_end = 32879765
signal_len = 38556,  pulses = 64
Iteration 1. t: 182    min: 121 (52)    max: 244 (12)    delta 5
Iteration 2. t: 182    min: 121 (52)    max: 244 (12)    delta 0
Pulse coding: Short pulse length 121 - Long pulse length 244

Short distance: 121, long distance: 0, packet distance: 147

p_limit: 182
bitbuffer:: Number of rows: 25
[00] {1} 00 : 0
[01] {1} 00 : 0
[02] {1} 00 : 0
[03] {1} 00 : 0
[04] {1} 00 : 0
[05] {1} 00 : 0
[06] {1} 00 : 0
[07] {1} 00 : 0
[08] {1} 00 : 0
[09] {1} 00 : 0
[10] {1} 00 : 0
[11] {1} 00 : 0
[12] {1} 00 : 0
[13] {1} 00 : 0
[14] {1} 00 : 0
[15] {1} 00 : 0
[16] {1} 00 : 0
[17] {1} 00 : 0
[18] {1} 00 : 0
[19] {1} 00 : 0
[20] {1} 00 : 0
[21] {1} 00 : 0
[22] {1} 00 : 0
[23] {1} 00 : 0
[24] {40} 91 6c 1b 00 40 : 10010001 01101100 00011011 00000000 01000000