1  # The MIT License (MIT)
 2  #
 3  # Copyright (c) 2019 Dave Astels for Adafruit Industries
 4  #
 5  # Permission is hereby granted, free of charge, to any person obtaining a copy
 6  # of this software and associated documentation files (the "Software"), to deal
 7  # in the Software without restriction, including without limitation the rights
 8  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9  # copies of the Software, and to permit persons to whom the Software is
10  # furnished to do so, subject to the following conditions:
11  #
12  # The above copyright notice and this permission notice shall be included in
13  # all copies or substantial portions of the Software.
14  #
15  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21  # THE SOFTWARE.
22  
23  import time
24  import board
25  import busio
26  import adafruit_si7021
27  from adafruit_itertools.adafruit_itertools import count
28  from adafruit_itertools.adafruit_itertools_extras import repeatfunc
29  
30  
31  i2c = busio.I2C(board.SCL, board.SDA)
32  sensor = adafruit_si7021.SI7021(i2c)
33  
34  
35  def read_temperature():
36      return sensor.temperature
37  
38  
39  def now():
40      return time.monotonic()
41  
42  
43  datapoints = zip(count(1), repeatfunc(now), map(int, repeatfunc(read_temperature)))
44  
45  while True:
46      print(next(datapoints))
47      time.sleep(20.0)