1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
from machine import Pin, PWM, ADC
import utime
import _thread
def led_blink_nr(nr):
internal_led = machine.Pin(25, machine.Pin.OUT)
for i in range(0,nr):
internal_led.on()
utime.sleep(0.3)
internal_led.off()
utime.sleep(0.3)
def get_temperature():
temp_sensor = ADC(4)
temperature = temp_sensor.read_u16()
to_volts = 3.3 / 65535
temperature = temperature * to_volts
celsius_degrees = 27 - (temperature - 0.706) / 0.001721
return celsius_degrees
def buzz():
buzzer = PWM(Pin(15))
buzzer.freq(1000)
buzzer.duty_u16(1000)
utime.sleep(0.1)
buzzer.duty_u16(0)
def alarm():
for i in range (0,3):
buzzer = PWM(Pin(15))
buzzer.freq(400)
buzzer.duty_u16(1000)
utime.sleep(0.5)
buzzer.duty_u16(0)
buzzer.freq(800)
buzzer.duty_u16(1000)
utime.sleep(0.5)
buzzer.duty_u16(0)
def calc_mean(temp):
tr=0
for i in range(0,len(temp)):
tr=tr+temp[i]
return tr/10
t = [0, 0, 0, 0, 0, 0, 0, 0 ,0 ,0]
lock = _thread.allocate_lock()
def second_thread():
#print temperature every 5 s
while True:
#if not lock.locked():
lock.acquire()
bn = calc_mean(t)
lock.release()
if get_temperature() >= bn+1:
alarm()
led_blink_nr(bn)
utime.sleep(5)
def main():
_thread.start_new_thread(second_thread, ())
count = 0
#get temperture reading every 1 s
while True:
lock.acquire()
#buzz()
t[count%10] = get_temperature()
lock.release()
count = count + 1
#if count == 10:
# count = 0
utime.sleep(1)
if __name__=="__main__":
main()
|
