HT12E

GPIO_HT12E.py

# Python v3.4.2 console based script
# Set Raspberry Pi GPIO ports Low depending on user input
# User enters number between 0 and 15, GPIO ports 22, 23, 24 & 25
# are set as BCD representations of the decimal input.
# GPIO ports are weighted 0, 2, 4, 8 [GPIO 22, 23, 24, 25]
# Number 99 entered quits the script
# GPIO ports connect to AD8-11 ports on HT12E encoder chip
# user input is BCD coded & used to set AD8-11 ports
# GPIO port 17 is used to send trigger pulse to activate the HT12E for 1 complete cycle


import RPi.GPIO as GPIO # import GPIO module
import time

GPIO.setwarnings(False) # disable warning messages
GPIO.setmode(GPIO.BCM)  # use chip GPIO pin numbers

GPIO.setup(17, GPIO.OUT)
GPIO.output(17, GPIO.LOW)
GPIO.setup(22, GPIO.OUT)
GPIO.output(22, GPIO.HIGH)
GPIO.setup(23, GPIO.OUT)
GPIO.output(23, GPIO.HIGH)
GPIO.setup(24, GPIO.OUT)
GPIO.output(24, GPIO.HIGH)
GPIO.setup(25, GPIO.OUT)
GPIO.output(25, GPIO.HIGH)

def One():
    GPIO.output(22, GPIO.LOW)

def Two():
    GPIO.output(23, GPIO.LOW)

def Four():
    GPIO.output(24, GPIO.LOW)

def Eight():
    GPIO.output(25, GPIO.LOW)

def ClearAll():
    GPIO.output(22, GPIO.HIGH)
    GPIO.output(23, GPIO.HIGH)
    GPIO.output(24, GPIO.HIGH)
    GPIO.output(25, GPIO.HIGH)

def Trigger():
    GPIO.output(17, GPIO.HIGH)
    time.sleep(0.005)
    GPIO.output(17, GPIO.LOW)

try:
    while True:
        print ("Setting GPIO ports Decimal to BCD")
        print ("Enter number between 0 and 15 [99 quits]")
        print ("Warning! supplied parameters are not validated")
        decimal = input(">_ ") # get number as a string
        print
        dec_number = int(decimal) # convert string to integer
        if dec_number != 99:
            ClearAll() # set A8-11 ports to '0000'
            Trigger() # send trigger pulse
            time.sleep(0.1)
            if dec_number == 0:
                ClearAll()
                Trigger()
            if dec_number == 1:
                One()
                Trigger()
            if dec_number == 2:
                Two()
                Trigger()
            if dec_number == 3:
                One()
                Two()
                Trigger()
            if dec_number == 4:
                Four()
                Trigger()
            if dec_number == 5:
                One()
                Four()
                Trigger()
            if dec_number == 6:
                Two()
                Four()
                Trigger()
            if dec_number == 7:
                One()
                Two()
                Four()
                Trigger()
            if dec_number == 8:
                Eight()
                Trigger()
            if dec_number == 9:
                One()
                Eight()
                Trigger()
            if dec_number == 10:
                Two()
                Eight()
                Trigger()
            if dec_number == 11:
                One()
                Two()
                Eight()
                Trigger()
            if dec_number == 12:
                Four()
                Eight()
                Trigger()
            if dec_number == 13:
                One()
                Four()
                Eight()
                Trigger()
            if dec_number == 14:
                Two()
                Four()
                Eight()
                Trigger()
            if dec_number == 15:
                One()
                Two()
                Four()
                Eight()
                Trigger()
        else: # user exit
            print ("Exiting..")
            GPIO.cleanup()
            break

except KeyboardInterrupt: # catch the Ctrl-C
    print ("Exit..")
except: # catch other errors
    print ("Error..Exiting")
finally: # clean up on exit
    GPIO.cleanup()