Posted By

robbieguk on 01/05/14

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Last Edited at 01/05/14 05:00am

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raspberry pi trafic light

/ Published in: Python

raspberry pi trafic light with basic menu

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#! /usr/bin/python

import time
import RPi.GPIO as GPIO

# North set of traffic light
# Define LED colour and their GPIO pin
RED_NORTH = 17
YEL_NORTH = 21
GRN_NORTH = 22

# East set of traffic light
RED_EAST = 25
YEL_EAST = 8
GRN_EAST = 7

GPIO.setmode(GPIO.BCM)

ans=True

while ans:
    print("""
    1.Run Lights
    2.clear GPIO
    3.say hi
    4.Exit/Quit
    """)
    ans=raw_input("What would you like to do? ")
    if ans=="1":
      print("\nLights Running")
      GPIO.setwarnings(False)
      GPIO.setup(RED_NORTH, GPIO.OUT)
      GPIO.setup(YEL_NORTH, GPIO.OUT)
      GPIO.setup(GRN_NORTH, GPIO.OUT)
      GPIO.setup(RED_EAST, GPIO.OUT)
      GPIO.setup(YEL_EAST, GPIO.OUT)
      GPIO.setup(GRN_EAST, GPIO.OUT)
      delay = 1
      GPIO.output(RED_NORTH, True)    #ALL red
      GPIO.output(RED_EAST, True)
      time.sleep (delay)
      time.sleep (delay)
        
      GPIO.output(YEL_EAST, True)         
      time.sleep (delay)
      GPIO.output(YEL_EAST, False)
      GPIO.output(RED_EAST, False)

GPIO.output(GRN_EAST, True)     # East green
      time.sleep (delay)
      time.sleep (delay)
      GPIO.output(GRN_EAST, False)
    
      GPIO.output(YEL_EAST, True)     
      time.sleep (delay)
      GPIO.output(YEL_EAST, False)
        
      GPIO.output(RED_EAST, True)     # All red
      time.sleep (delay)  
    
      GPIO.output(YEL_NORTH, True)    
      time.sleep (delay)      
      GPIO.output(YEL_NORTH, False)   
      GPIO.output(RED_NORTH, False)
        
      GPIO.output(GRN_NORTH, True)    # North green
      time.sleep (delay)
      time.sleep (delay)
      GPIO.output(GRN_NORTH, False)

GPIO.output(YEL_NORTH, True)    
      time.sleep (delay)      
      GPIO.output(YEL_NORTH, False)
      GPIO.cleanup()
    
    elif ans=="2":
      print("\n GPIO Cleard")
      GPIO.cleanup()
    elif ans=="3":
      print("\n hi")
    elif ans=="4":
      print("\n Goodbye")
      ans = None
    else:
       print("\n Not Valid Choice Try again")

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