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import RPi.GPIO as GPIO
from abc import ABC, abstractmethod
# Abstract Class for heating
class heating(ABC):
def __init__(self, db):
self.temperature = 0
self.taget = 0
self.on = False
self.db = db
self.setup()
def up(self, increase=0.5):
self.target += increase
self.update()
def down(self, decrease=0.5):
self.target -= decrease
self.update()
def update(self):
if self.temperature < self.target:
self.on = True
else:
self.on = False
'''
Abstract methods used so that configuration for different
device types other than a Raspberry Pi is easier in the future
and all other methods can simply be inherited
'''
# Method for initial setup according to device GPIO
@abstractmethod
def setup(self):
pass
# Method to turn the heating on
@abstractmethod
def turn_on(self):
pass
# Method to turn the heating off
@abstractmethod
def turn_off(self):
pass
# Method to get the current actual temperature, can be changed for
# different types of temperature sensor when inheriting this
# class
@abstractmethod
def get_temperature(self):
pass
# inherrited from heating class
# overriding abstract methods from heating class
class rpi_heating(heating):
def setup(self):
# GPIO Numbers instead of board numbers
GPIO.setmode(GPIO.BCM)
# https://tutorials-raspberrypi.com/raspberry-pi-control-relay-switch-via-gpio/
# constant value for the relay number
self.RELAY = 17
GPIO.setup(self.RELAY, GPIO.OUT) # GPIO Assign mode
def turn_on(self):
GPIO.output(self.RELAY, GPIO.LOW) # out
def turn_on(self):
GPIO.output(self.RELAY, GPIO.HIGH) # on
def get_temperature(self):
pass
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