def __init__(self, address, gpio):
self.address = address
self.gpio = gpio
self.last_reading = None
self.ready_status = False
self.driver = None
if all((self.address, self.gpio)):
self.driver = OneWire(self.address, self.gpio)
if self.driver:
self.ready_status = self.driver.setupComplete
def __init__(self,interface,args):
self.supportedInterfaces = ["oneWire"]
self.interface = interface
self.ready = False
if self.interface not in self.supportedInterfaces:
print "Unsupported interface."
self.listInterfaces()
return
if self.interface == "oneWire":
self.driver = OneWire(args.get("address"), args.get("gpio", None))
# signal ready status
self.ready = self.driver.setupComplete
# match the return value to
self.readValue = self.__readOneWire;
class TemperatureSensor:
def __init__(self,interface,args):
self.supportedInterfaces = ["oneWire"]
self.interface = interface
self.ready = False
if self.interface not in self.supportedInterfaces:
print "Unsupported interface."
self.listInterfaces()
return
if self.interface == "oneWire":
self.driver = OneWire(args.get("address"), args.get("gpio", None))
# signal ready status
self.ready = self.driver.setupComplete
# match the return value to
self.readValue = self.__readOneWire;
def listInterfaces(self):
print "The supported interfaces are:"
for interface in self.supportedInterfaces:
print interface
def __readOneWire(self):
# device typically prints 2 lines, the 2nd line has the temperature sensor at the en
# eg. a6 01 4b 46 7f ff 0c 10 5c t=26375
rawValue = self.driver.readDevice()
# grab the 2nd line, then read the last entry in the line, then get everything after the "=" sign
value = rawValue[1].split()[-1].split("=")[1]
# convert value from string to number
value = int(value)
# DS18B20 outputs in 1/1000ths of a degree C, so convert to standard units
value /= 1000.0
return value
def __init__(self, interface, args):
self.supportedInterfaces = ["oneWire"]
self.interface = interface
self.ready = False
# if specified interface not supported
if self.interface not in self.supportedInterfaces:
print "Unsupported interface."
self.listInterfaces()
return
# set up a driver based on the interface type
# you can extend this class by adding more drivers! (eg. serial, I2C, etc)
if self.interface == "oneWire":
self.driver = OneWire(args.get("address"), args.get("gpio", None))
# signal ready status
self.ready = self.driver.setupComplete
# match the return value to
self.readValue = self.__readOneWire
class onewire_temp_sensor:
def __init__(self, address, gpio):
self.address = address
self.gpio = gpio
self.last_reading = None
self.ready_status = False
self.driver = None
if all((self.address, self.gpio)):
self.driver = OneWire(self.address, self.gpio)
if self.driver:
self.ready_status = self.driver.setupComplete
def get_status(self):
return self.ready_status
def read_temp(self):
try:
# device typically prints 2 lines, the 2nd line has the temperature sensor at the end
# eg. a6 01 4b 46 7f ff 0c 10 5c t=26375
rawValue = self.driver.readDevice()
# grab the 2nd line, then read the last entry in the line, then get everything after the "=" sign
value = rawValue[1].split()[-1].split("=")[1]
# convert value from string to number
value = int(value)
# DS18B20 outputs in 1/1000ths of a degree C, so convert to standard units
value /= 1000.0
self.last_reading = value
return value
except Exception as error:
print('could not read from {} at pin {}'.format(
self.address, self.gpio))
print('Ready Status is {} and last reading was {}'.format(
self.ready_status, self.last_reading))
print('returned error {}'.format(error))
return False