Biostart/localControl.py at master · SoaAlex/Biostart · GitHub

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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
#!/usr/bin/env python

#https://github.com/AlgoSolu/DS18B20_YF-S201_RaspberryPi/tree/master/YF-S201

import time, sys
import RPi.GPIO as GPIO
from datetime import datetime

import logging
import threading
import time

from serial import Serial
import json

def read_flowmeter():
    print("READ FLOWMETER")
    global total_liters_period
    secondes = 0

    pin_input = 8
    sample_rate = 5     # Sampling each 5 secondes
    time_start = 0
    time_end = 0
    period = 0;
    hz = []             # Frequency !important!
    m = 0.0021          # See linear.pdf (coefficient in order to get a linear function)

    db_good_sample = 0
    db_hz = 0
    db_liter_by_min = 0

    continueThread = True;
    while continueThread:
        # start / end
        time_start = time.time()
        time_end = time_start + sample_rate
        hz = []
        sample_total_time = 0

        # Edge
        current = GPIO.input(pin_input)
        edge = current # Rising edge / Falling edge

        try:
            while time.time() <= time_end:
                t = time.time();
                v = GPIO.input(pin_input)
                if current != v and current == edge:
                    period = t - time_start # Impulsion period
                    new_hz = 1/period
                    hz.append(new_hz)               # Period = 1/period
                    sample_total_time += t - time_start
                    time_start = t;
                current = v;

            secondes += sample_rate
            nb_samples = len(hz);
            if nb_samples >0:
                average = sum(hz) / float(len(hz));
                good_sample = sample_total_time/sample_rate
                db_good_sample = round(good_sample*100,4)
                average = average * good_sample
            else:
                average = 0

            total_liters_period += average*m*sample_rate

            # print("\t", db_hz,'(hz) average')
            # print('\t', db_liter_by_min,'(L/min)') # Display L/min instead of L/sec
            # print(round(total_liters_period,4),'(L) total')
            # print(round(secondes/60,4), '(min) total')
            # print('-------------------------------------')
        except KeyboardInterrupt:
            print('\n CTRL+C - Exiting')
            continueThread = False;
            GPIO.cleanup()


def readPressure(ser):
    ser.flushInput()
    ser.flushOutput()

    ser.write(bytes(b'a'))
    s = str(ser.read(11))
    nb = s.split('|');
    print(s);
    ret = {
        "C1" : float(nb[0]),
        "C2" : float(nb[1])
    }
    return (ret)


def writeDB(C1, C2, L):
    print(C1, C2, L)

def secondThread():
    return 1


if __name__ == "__main__":
    global total_liters_period
    total_liters_period = 0

    pin_input = 8
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(pin_input, GPIO.IN)


    ser = Serial('/dev/ttyACM4')
    print(ser.name)
    time.sleep(2);

    x1 = threading.Thread(target=read_flowmeter)
    x1.start()

    continueThread = True
    while continueThread:
        try:
            pressure = readPressure(ser)
            tmpLiter = total_liters_period
            total_liters_period = 0
            writeDB(float(pressure["C1"]), float(pressure["C2"]), tmpLiter)

            time.sleep(10)
        except KeyboardInterrupt:
            print('\n CTRL+C - Exiting')
            continueThread = False;
    ser.close()

    GPIO.cleanup()