1  # SPDX-FileCopyrightText: 2018 Anne Barela for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  # CircuitPython Speaking Thermometer Example
 6  # Coded for Circuit Playground Express but it may be
 7  # modified for any CircuitPython board with changes to
 8  # button, thermister and audio board definitions.
 9  # Anne Barela for Adafruit Industries, MIT License
10  
11  import time
12  import board
13  import adafruit_thermistor
14  import audioio
15  import audiocore
16  from digitalio import DigitalInOut, Direction, Pull
17  
18  # Enables the speaker for audio output
19  spkrenable = DigitalInOut(board.SPEAKER_ENABLE)
20  spkrenable.direction = Direction.OUTPUT
21  spkrenable.value = True
22  
23  D1 = board.BUTTON_A
24  D2 = board.BUTTON_B
25  
26  # Button A setup (Celsius)
27  button_a = DigitalInOut(D1)
28  button_a.direction = Direction.INPUT
29  button_a.pull = Pull.DOWN
30  # Button B setup (Fahrenheit)
31  button_b = DigitalInOut(D2)
32  button_b.direction = Direction.INPUT
33  button_b.pull = Pull.DOWN
34  
35  # Set up reading the Circuit Playground Express thermistor
36  thermistor = adafruit_thermistor.Thermistor(
37      board.TEMPERATURE, 10000, 10000, 25, 3950)
38  
39  # Audio playback object and helper to play a full file
40  aout = audioio.AudioOut(board.A0)
41  
42  # Play a wave file
43  def play_file(wavfile):
44      wavfile = "/numbers/" + wavfile
45      print("Playing", wavfile)
46      with open(wavfile, "rb") as f:
47          wav = audiocore.WaveFile(f)
48          aout.play(wav)
49          while aout.playing:
50              pass
51  
52  # Function should take an integer -299 to 299 and say it
53  # Assumes wav files are available for the numbers
54  def read_temp(temp):
55      play_file("The temperature is.wav")
56      if temp < 0:
57          play_file("negative.wav")
58          temp = - temp
59      if temp >= 200:
60          play_file("200.wav")
61          temp = temp - 200
62      elif temp >= 100:
63          play_file("100.wav")
64          temp = temp - 100
65      if (temp >= 0 and temp < 20) or temp % 10 == 0:
66          play_file(str(temp) + ".wav")
67      else:
68          play_file(str(temp // 10) + "0.wav")
69          temp = temp - ((temp // 10) * 10 )
70          play_file(str(temp) + ".wav")
71      play_file("degrees.wav")
72  
73  while True:
74      if button_a.value:
75          read_temp(int(thermistor.temperature))
76          play_file("celsius.wav")
77      if button_b.value:
78          read_temp(int(thermistor.temperature * 9 / 5 + 32))
79          play_file("fahrenheit.wav")
80      time.sleep(0.01)