dosingpump/main.py at master · niget2002/dosingpump · GitHub

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"""
main.py
"""

import utime
import machine
import ssd1306
import network
import ubinascii
import ujson

import onewire
import ds18x20

try:
    import usocket as socket
except:
    import socket
import uselect as select

import ntp
from dst import dst_time


import gc
gc.collect()

# Hardware Setup

# setup OLED interface
i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))
DEVICEID = ubinascii.hexlify(machine.unique_id()).decode('utf-8')
OLED = ssd1306.SSD1306_I2C(128, 32, i2c)

# setup Temp Probe
ds_pin = machine.Pin(2)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))

roms = ds_sensor.scan()
print('Found DS devices: ', roms)
ds_sensor.convert_temp()

# grab WiFi Settings
sta_if = network.WLAN(network.STA_IF)

# setup Timing
temp_interval = 5000
screen_interval = 1000

# setup pump
pump = machine.Pin(14, machine.Pin.OUT)

# setup mixer
mixer_pin = machine.Pin(12)
mixer = machine.PWM(mixer_pin)
mixer.freq(500)

callibrate_start = 0
callibrate_stop = 0
next_runtime = "TEMP"
message = "NOMESS"

# Setup Web Page
def web_page():
    global data
    if pump.value() == 1:
        gpio_state="ON"
    else:
        gpio_state="OFF"


    html = """<html><head> <title>Dosing Pump Controller</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" href="data:,">
    <style>
    html{font-family: Helvetica; display:inline-block; margin: 0px auto; text-align: center;}
    .center{margin-left: auto; margin-right: auto;}
    h1{color: #0F3376; padding: 2vh;}
    tr{font-size: 1.5rem;}
    td{text-align: center;}
    table, tr, td{border: 1px solid black;}
    .button{display: inline-block; background-color: #e7bd3b; border: none; border-radius: 4px; color: white; padding: 16px 40px; text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}
    .button2{background-color: #4286f4;}</style></head>

    <body>
    <h1>Dosing Pump Setup</h1>
    <table class="center">
    <tr>
        <td>PUMP state:</td><td><strong>""" + gpio_state + """</strong></td>
    </tr>
    <tr>
        <td>Next Run Time:</td><td>""" + str(data['pump_hour']) + """:""" + str(data['pump_min']) + """</td>
    </tr>
    <tr>
        <td>Set Run Time</td>
        <td><form action="/?settime"><input type=text id=phour name=phour size=2>:<input type=text id=pmin name=pmin size=2></p><input type=submit value=submit></form></td>
    </tr>
    <tr>
        <td>Current Run Length:</td>
        <td>""" + str(data['pump_runtime']) + """</td>
    </tr>
    <tr>
        <td>Set Run Length</td>
        <td><form action="/?settime"><input type=text id=runtime name=runtime size=5> ms</p><input type=submit value=submit></form></td>
    </tr>
    <tr>
        <td>Callibrate Run Length</td>
        <td><a href="/?pump=on"><button class="button">Callibrate Start</button></a></p><p><a href="/?pump=off"><button class="button button2">Callibrate Stop</button></a></td>
    <tr>
        <td>Prime Pump</td>
        <td><a href="/?prime=on"><button class="button">Prime Start</button></a></p><p><a href="/?prime=off"><button class="button button2">Prime Stop</button></a></td>
    </tr>
    </table>
    </body></html>"""
    return html

# Setup Socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)

data = {'pump_hour': 12, 'pump_min':0, 'pump_runtime':0}

def json_read():
    # grab config from json
    global data
    global pump_hour
    global pump_min
    write_values=0
    try:
        json_data_file = open('config.json', 'r')
        data = ujson.loads(json_data_file.read())
        json_data_file.close()
    except:
        print("Cloud not read config file")
        json_write()
    if data.get('pump_hour')==None:
        data['pump_hour'] = 12
        write_values=1
    if data.get('pump_min')==None:
        data['pump_min'] = 0
        write_values=1
    if data.get('pump_runtime')==None:
        data['pump_runtime'] = 10
        write_values=1
    if write_values:
        json_write()
    print(data)

# Setup Json Write
def json_write():
    """ Writes global data value to config file """
    global data
    try:
        json_data_file = open('config.json', 'w')
        json_data_file.write(ujson.dumps(data))
        json_data_file.close()
    except Exception as e:
        print("Could not update config file")


# Function initilization
def print_screen(data0, data1, data2, data3):
    """prints data to the OLED"""
    global data
    OLED.fill(0)
    OLED.text(sta_if.ifconfig()[0], 0, 0)
    OLED.text(data0, 0, 10)
    OLED.text(data1, 50, 10)
    OLED.text(data2, 0, 20)
    OLED.text(data3, 50, 20)
    OLED.show()

def c_to_f(c):
    return round(c*(9/5)+32)

def qs_parse(qs):
    parameters = {}
    spaceSplit = qs.split(" ")
    matching = [s for s in spaceSplit if "?" in s]
    ampersandSplit = matching[0].split("&")
    for element in ampersandSplit:
        equalSplit = element.split("=")
        parameters[equalSplit[0].replace('/?','')] = equalSplit[1]
    return parameters

def load_web(r):
    global data
    global callibrate_start
    global callibrate_stop
    global next_runtime
    for readable in r:
        conn, addr = s.accept()
        print('Got a connection from %s' % str(addr))
        request = conn.recv(1024)
        request = str(request)
        print('Content = %s' % request)
        pump_on = request.find('/?pump=on')
        pump_off = request.find('/?pump=off')
        prime_on = request.find('/?prime=on')
        prime_off = request.find('/?prime=off')
        set_time = request.find('/?phour')
        set_runtime = request.find('/?runtime')
        if pump_on == 6:
            print('LED ON')
            pump.value(1)
            callibrate_start = utime.ticks_ms()
        if pump_off == 6:
            print('LED OFF')
            pump.value(0)
            callibrate_stop = utime.ticks_ms()
            data['pump_runtime'] = callibrate_stop - callibrate_start
            json_write()
        if prime_on == 6:
            print('LED ON')
            pump.value(1)
        if prime_off == 6:
            print('LED OFF')
            pump.value(0)
        if set_time == 6:
            parameters = qs_parse(request)
            print(parameters)
            data['pump_hour'] = parameters['phour']
            data['pump_min'] = parameters['pmin']
            next_runtime = str(data['pump_hour'])+':'+str(data['pump_min'])
            print(data)
            json_write()
        if set_runtime == 6:
            parameters = qs_parse(request)
            print(parameters)
            data['pump_runtime'] = parameters['runtime']
            print(data)
            json_write()
        response = web_page()
        conn.send('HTTP/1.1 200 OK\n')
        conn.send('Content-Type: text/html\n')
        conn.send('Connection: close\n\n')
        conn.sendall(response)
        conn.close()


def main():
    """main loop function"""

    # Initilize local variables
    global data
    temp_start = utime.ticks_ms()
    screen_start = utime.ticks_ms()
    mixer_start = utime.ticks_ms()
    pump_start = utime.ticks_ms()
    global callibrate_start # Initilize value in case website is in bad state
    time = dst_time()
    pump_run = 0 # allows pump to run 1 time at next iteration
    global next_runtime
    global message
    run_times = [0, 30000, 5000  ] # placeholder, mixer runtime, pause run time,

    temperature = "NOTEMP"

    while 1:
        run_times = [0, 30000, 5000, int(data['pump_runtime']) ] # placeholder, mixer runtime, pause run time,


        if ((time[3] == int(data['pump_hour'])) and (time[4] == int(data['pump_min'])) and (time[5] < 10) and (pump_run == 0)):
            print("Starting Pump Run")
            pump_run = 1
            pump_start = utime.ticks_ms()
            mixer.duty(300) # bump up current to get motor to start spinning
            utime.sleep_ms(500)
            mixer.duty(120) # drop to actual mixing speed
            message = "MixerOn"
            print("Starting Mixer")


        if utime.ticks_diff(utime.ticks_ms(), temp_start) > temp_interval:
            temperature = str(c_to_f(ds_sensor.read_temp(roms[0])))
            ds_sensor.convert_temp()
            temp_start = utime.ticks_ms()
        if utime.ticks_diff(utime.ticks_ms(), screen_start) > screen_interval:
            time = dst_time()
            this_time = str(time[3])+':'+str(time[4])
            next_runtime = str(data['pump_hour'])+':'+str(data['pump_min'])
            print_screen(this_time, next_runtime, temperature, message)
            screen_start = utime.ticks_ms()
        if pump_run != 0:
            if utime.ticks_diff(utime.ticks_ms(), pump_start) > run_times[pump_run]:
                if pump_run == 3:
                    pump.value(0)
                    message = ""
                    print("Turning Pump Off")
                    pump_run = 0
                if pump_run == 2:
                    pump.value(1)
                    message = "Pump On"
                    pump_run = 3
                    pump_start = utime.ticks_ms()
                if pump_run == 1:
                    mixer.duty(0)
                    message = "Pausing"
                    pump_start = utime.ticks_ms()
                    print("Starting Pump")
                    pump_run = 2
        if (time[4] == 0) and (time[5] == 0):
            print("Setting Time")
            try:
                ntp.settime()
            except:
                print("Setting Time Failed")

        r, w, err = select.select((s,), (), (), 1)
        if r:
            load_web(r)

print_screen('Initializing', '', '...', '')
ntp.settime()
time = dst_time()
print(time)
json_read()
main()