backendRelay.py

# !/usr/bin/python

# Library for PiRelay
# Developed by: SB Components
# Author: Ankur
# Project: PiRelay
# Python: 3.4.2

#===========================================================================
import time

class Relay:
    ''' Class to handle Relay
    Arguments:
    relay = string Relay label (i.e. "RELAY1","RELAY2","RELAY3","RELAY4")
    '''
    relaypins = {"RELAY1":15, "RELAY2":13, "RELAY3":11, "RELAY4":7}

    def __init__(self, relay, device, gpiomanager):
        self.pin = self.relaypins[relay]
        self.relay = relay
        self.gpiomanager = gpiomanager
        self.gpiomanager.initGPIO(self.pin)
        self.device = device
        # assume off at beginning
        self.ison=False
        print("{} device initialised on {}.".format(self.device, self.relay))

    def on(self):
        self.gpiomanager.onGPIO(self.pin)
        self.ison = True
        print("{} connected to {} - ON".format(self.device, self.relay))

    def off(self):
        self.gpiomanager.offGPIO(self.pin)
        self.ison = False
        print("{} connected to {} - OFF".format(self.device, self.relay))
#===========================================================================

# class Relay:
#    # dummy class for testing purposes
#    relaypins = {"RELAY1":15, "RELAY2":13, "RELAY3":11, "RELAY4":7}
# 
#    def __init__(self, relay, device):
#        self.pin = self.relaypins[relay]
#        self.relay = relay
#        self.device = device
#        # assume off at beginning
#        self.ison=False
#        print("{} device initialised on {}.".format(self.device, self.relay))
# 
#    def on(self):
#        self.ison = True
#        print("{} on {} - ON".format(self.device, self.relay))
# 
#    def off(self):
#        self.ison = False
#        print("{} on {} - OFF".format(self.device, self.relay))