def distance_op():
global distance
try:
# Read the new distance
new_distance = sio.read_distance()
# For testing -- uncomment the below, comment the above as required
#new_distance = int(raw_input("Enter distance:"))
#from random import randint
#new_distance = randint(0,30)
except:
print('Error reading distance data from the sensor!')
log.debug('Error reading distance data from the sensor!')
return False
# Check if the new_distance read is different from the old data
if new_distance != distance:
distance = new_distance
else:
return True
# Set the new distance in FB-DB
try:
# Set the distance in FB DB
fio.set_distance(distance)
except:
print('Error setting the distance in Firebase!')
log.debug('Error setting the distance in Firebase!')
# If internet connection error, still continue working smoothly!
return True
return True
def motor_run_op():
global distance, distance_sump, motor_running_status, sump_present
# Set the motor running status depending on the distance threshold
new_motor_running_status = sio.is_distance_over_threshold(
distance, motor_running_status)
# Check if sump present or not, if present, checking if water present or not
# If water is not present, it is by default True
if sump_present:
sump_water_present = not sio.is_distance_sump_over_threshold(
distance_sump)
else:
sump_water_present = True
# Doing a boolean operation of new_motor_running_status and sump_water_present
new_motor_running_status = new_motor_running_status and sump_water_present
# Check if the new motor status is different from the old one
if new_motor_running_status != motor_running_status:
motor_running_status = new_motor_running_status
try:
# Setting the motor running status in Firebase
fio.set_motor_switch_status(motor_running_status)
except:
print('Error setting the motor running status in Firebase')
log.debug('Error setting the motor running status in Firebase')
return motor_running_status
def main_switch_op():
try:
# Checking main_switch status
if not fio.is_main_switch_on():
return False
except:
print('Error fetching main_switch status from Firebase!')
log.debug('Error fetching main_switch status from Firebase!')
# If Pi cannot connect to the Internet, assume main_switch is "ON"
return True
return True
def motor_switch_op():
global motor_running_status
# If h/w switch is off, switch off motor
# Perform no operation no-matter what be the case
motor_running_status = sio.read_normal_switch()
# Also check the motor switch status of firebase
try:
motor_running_status = motor_running_status or fio.is_motor_switch_on()
except:
log.debug('Cannot fetch motor_switch_status from firebase!')
return motor_running_status
def distance_sump_op():
global distance_sump, sump_present
if not sump_present:
return True
try:
new_distance_sump = sio.read_distance_sump()
except:
print('Error reading distance_sump from the sensor!')
log.debug('Error reading distance_sump from the sensor!')
return False
# Check if the new_distance_sump is different from old data
if new_distance_sump != distance_sump:
distance_sump = new_distance_sump
else:
return True
# Set the new distance_sump in FB-DB
try:
fio.set_distance_sump(distance_sump)
except:
print('Error setting distance_sump into firebase!')
log.debug('Error setting distance_sump into firebase!')
# If no internet connection, still continue running smoothly
return True
return True
def init_all():
global distance, motor_running_status, sump_present, distance_sump
# Setting the motor as off, for safety purposes
sio.set_motor_switch(False)
log.debug("\n\nStarted at: " + str(time.ctime()))
try:
# Fetching initial distance from FB-DB
distance = fio.get_distance()
# Fetch initial Motor running status from FB-DB
motor_running_status = fio.is_motor_switch_on()
# Fetching initial distance_sump from FB-DB
distance_sump = fio.get_distance_sump()
# Fetching initial data to check if sump is present or not
sump_present = fio.is_sump_present()
except:
print('Error fetching data from Firebase!')
log.debug('Error fetching data from Firebase!')
# Setting all data as default, so that the program runs without Internet
distance = DISTANCE_DEFAULT
distance_sump = DISTANCE_SUMP_DEFAULT
motor_running_status = MOTOR_STATUS_DEFAULT
sump_present = SUMP_PRESENT_DEFAULT
else:
print('Initial distance fetched from FB-DB!')
log.debug('Initial distance fetched from FB-DB!')
print('Initial Motor running status fetched from FB-DB!')
log.debug('Initial Motor running status fetched from FB-DB!')
print('Initial distance_sump fetched from FB-DB!')
log.debug('Initial distance_sump fetched from FB-DB!')
print('Success fetching sump present or not from FB-DB!')
log.debug('Success fetching sump present or not from FB-DB!')