<s> from Tkinter import * <EOL> import RPi . GPIO as GPIO <EOL> import time , math <EOL> C = <NUM_LIT> <EOL> R1 = <NUM_LIT:1000> <EOL> B = <NUM_LIT> <EOL> R0 = <NUM_LIT> <EOL> GPIO . setmode ( GPIO . BCM ) <EOL> a_pin = <NUM_LIT> <EOL> b_pin = <NUM_LIT> <EOL> buzzer_pin = <NUM_LIT> <EOL> GPIO . setup ( buzzer_pin , GPIO . OUT ) <EOL> set_temp = <NUM_LIT> <EOL> def discharge ( ) : <EOL> GPIO . setup ( a_pin , GPIO . IN ) <EOL> GPIO . setup ( b_pin , GPIO . OUT ) <EOL> GPIO . output ( b_pin , False ) <EOL> time . sleep ( <NUM_LIT> ) <EOL> def charge_time ( ) : <EOL> GPIO . setup ( b_pin , GPIO . IN ) <EOL> GPIO . setup ( a_pin , GPIO . OUT ) <EOL> GPIO . output ( a_pin , True ) <EOL> t1 = time . time ( ) <EOL> while not GPIO . input ( b_pin ) : <EOL> pass <EOL> t2 = time . time ( ) <EOL> return ( t2 - t1 ) * <NUM_LIT> <EOL> def analog_read ( ) : <EOL> discharge ( ) <EOL> t = charge_time ( ) <EOL> discharge ( ) <EOL> return t <EOL> def read_resistance ( ) : <EOL> n = <NUM_LIT:10> <EOL> total = <NUM_LIT:0> ; <EOL> for i in range ( <NUM_LIT:0> , n ) : <EOL> total = total + analog_read ( ) <EOL> t = total / float ( n ) <EOL> T = t * <NUM_LIT> * <NUM_LIT> <EOL> r = ( T / C ) - R1 <EOL> return r <EOL> def read_temp_c ( ) : <EOL> R = read_resistance ( ) <EOL> t0 = <NUM_LIT> <EOL> t25 = t0 + <NUM_LIT> <EOL> inv_T = <NUM_LIT:1> / t25 + <NUM_LIT:1> / B * math . log ( R / R0 ) <EOL> T = ( <NUM_LIT:1> / inv_T - t0 ) <EOL> return T <EOL> def buzz ( pitch , duration ) : <EOL> period = <NUM_LIT:1.0> / pitch <EOL> delay = period / <NUM_LIT:2> <EOL> cycles = int ( duration * pitch ) <EOL> for i in range ( cycles ) : <EOL> GPIO . output ( buzzer_pin , True ) <EOL> time . sleep ( delay ) <EOL> GPIO . output ( buzzer_pin , False ) <EOL> time . sleep ( delay ) <EOL> class App : <EOL> def __init__ ( self , master ) : <EOL> self . master = master <EOL> frame = Frame ( master ) <EOL> frame . pack ( ) <EOL> label = Label ( frame , text = '<STR_LIT>' , font = ( "<STR_LIT>" , <NUM_LIT:32> ) ) <EOL> label . grid ( row = <NUM_LIT:0> ) <EOL> self . reading_label = Label ( frame , text = '<STR_LIT>' , font = ( "<STR_LIT>" , <NUM_LIT> ) ) <EOL> self . reading_label . grid ( row = <NUM_LIT:1> ) <EOL> self . update_reading ( ) <EOL> def update_reading ( self ) : <EOL> temp_c = read_temp_c ( ) <EOL> if temp_c > set_temp : <EOL> buzz ( <NUM_LIT> , <NUM_LIT> ) <EOL> reading_str = "<STR_LIT>" . format ( temp_c ) <EOL> self . reading_label . configure ( text = reading_str ) <EOL> self . master . after ( <NUM_LIT> , self . update_reading ) <EOL> root = Tk ( ) <EOL> root . wm_title ( '<STR_LIT>' ) <EOL> app = App ( root ) <EOL> root . geometry ( "<STR_LIT>" ) <EOL> try : <EOL> root . mainloop ( ) <EOL> finally : <EOL> print ( "<STR_LIT>" ) <EOL> GPIO . cleanup ( ) </s>
