redlight.py

   1 from machine import Pin
   2 import time, random
   3
   4 green=Pin(17,Pin.OUT)
   5 yellow=Pin(14,Pin.OUT)
   6 red=Pin(15,Pin.OUT)
   7
   8 leds=[green,yellow,red]
   9 global count
  10 count=0
  11
  12 manPin=Pin(18,Pin.IN,Pin.PULL_UP)
  13 button=Pin(16,Pin.IN,Pin.PULL_UP)
  14
  15 green.on()
  16 yellow.off()
  17 red.off()
  18
  19 def button_handler():
  20     if button.value()==0:
  21         global count
  22         leds[count].off()
  23         print(count)
  24         count=count+1
  25         if count==3:
  26             count=0
  27         leds[count].on()
  28         return count
  29
  30 def rand_handler():
  31     global count
  32     leds[count].off()
  33     print(count)
  34     count=count+1
  35     if count==3:
  36         count=0
  37     leds[count].on()
  38     return count
  39
  40 while True:
  41     if manPin.value()==1:
  42         button_handler()
  43         time.sleep(0.5)
  44     else:
  45         rand_handler()
  46         time.sleep(random.randint(3,15))
  47