Clever Geek Handbook

Bagaimana saya membuat akuarium pintar (backend)

gambar



Prolog



Bekerja sebagai programmer di salah satu perusahaan besar dan sukses di Moskow, saya tidak pernah berhenti meningkatkan keterampilan pemrograman saya dan mengikuti berbagai kursus di platform Udemy.

Tentunya hanya menonton saja dan mengulang semuanya setelah penulis membosankan, dan ada saat-saat yang tidak saya mengerti karena ketidakmampuan saya saat itu. Anda perlu membuat proyek Anda berdasarkan apa yang diberikan oleh penulis kursus - saya pikir, dan tentu saja saya benar. Hanya kesulitan nyata dan pemecahannya yang memberi Anda pengalaman yang tak ternilai, inilah pembelajaran nyata.



web , . Full-stack , , , . JavaScript Express, Appolo GraphQL ( , - REST ), Apollo GQL Vue.



, , , , . , , , " ", "The Facebook", "Instagram" .. , , .



, , , ? ...



, 15 3 . , " , , , ". . "" — , , , .



, . - , . - . .



, " " — 20-50 , "" . , (, , , ), , RGB . , . . . . . . , , .



Arduino. , , .



—



NodeMCU — "" WI-FI (ESP 8266), , Arduino nano wi-fi , .. NodeMCU, .





Arduino IDE ( Windows 10, ), WI-FI. , , . , , Lua( , Micro python, )



, , , C++ Arduino JS Python(). :



init.lua



print ( "Waiting ...")
tmr.register (0, 5000, tmr.ALARM_SINGLE, function (t) tmr.unregister (0); print ( "Starting ..."); dofile ( "main.lua") end)
tmr.start (0)


main.lua



--WiFi Settup
wifi.setmode(wifi.STATION)
local cfg={}
cfg.ssid="wifi_point_name"
cfg.pwd="point_pass"
wifi.sta.config(cfg)
cfg = nil
collectgarbage()

=wifi.ap.getip()


WI-FI , , begin end. esp-8266 , . , Micro python, , lua .



esptool 



pip install -g esptool

esptool.py --port COM3 --baud 460800 write_flash --flash_size=detect 0 esp8266-20191220-v1.12.bin


IDE EsPy "" .



, , :



  • boot.py — , . , Wi-Fi WebREPL;
  • main.py — , boot.py, .


WebREPL — ssh raspberri, , EsPy esptool, . — WI-FI — .



boot.py



import network
import time

'''    WiFi '''
wlan_id = "my_point"
wlan_pass = "strong_pass"

wlan = network.WLAN(network.STA_IF)
wlan.active(True)

if wlan.isconnected() == False:
    wlan.connect(wlan_id, wlan_pass)
    while wlan.isconnected() == False:
        time.sleep(3)
        print("Connection Fail...")
print('Device IP:', wlan.ifconfig()[0])


main.py , , asyncio, ( ).



main.py



from app import app_start

app_start()


MicroPyServer ( ), - ( ). .



app.py



from micropyserver import MicroPyServer

import ujson

server = MicroPyServer()

def send(self, **kwargs):
        '''
             
        '''
        server.send(
            ujson.dumps(kwargs),
            content_type="Content-Type: application/json",
            #    CORS 
            extra_headers=["Access-Control-Allow-Origin: *"]
        )
        gc.collect()

def healthcheck():
    send(success=1, healthcheck='green')

server.add_route("/healthcheck", healthcheck)

def app_start():
    server.start()


() , , . .



  • main.py
  • boot.py
  • app.py
  • micropyserver.py


, http://192.168.1.70/ . , http://192.168.1.70/healthcheck, — , 





// Json from chrome browser
{
    "success": 1,
    "healthcheck": "green",
}


hardware ( , LED-, LCD- .. ), , , . , , .



app.py



from heater import Heater

# ...  

class HttpHelper:
    """
          GET 
    """
    def __init__(self):
        pass

    def parse(self, request):
        '''
               
        '''
        lines = request.split("\r\n")

        result = {
            'lines': lines,
            'method': ure.search("^([A-Z]+)", lines[0]).group(1),
            'path': ure.search(
                "^[A-Z]+\\s+(/[-a-zA-Z0-9_.]*)", lines[0]
            ).group(1),
        }

        param_split = ure.sub("\/([a-z]+_?)+?\?", '', lines[0].split(" ")[1])
        result['params'] = self.get_params(param_split.split("&"))

        return result

    def get_params(self, params_as_array):
        '''
               query 
        '''
        params = {}

        for element in params_as_array:
            splited = element.split("=")

            params[splited[0]] = splited[1]

        return params

    def send(self, **kwargs):
        '''
             
        '''
        server.send(
            ujson.dumps(kwargs),
            content_type="Content-Type: application/json",
            extra_headers=["Access-Control-Allow-Origin: *"]
        )
        gc.collect()

# ...  

def get_water_temperature_C(request):
    '''
           
    '''
    try:
        water_heater.get_water_tmp_C()

        http_helper.send(
            success=1,
            water_temperature_c=water_heater.water_tmp
        )

    except Exception as e:
        print(e)
        http_helper.send(success=0, error=e)

# ...  

server.add_route("/healthcheck", healthcheck)
server.add_route("/get_water_tmp", get_water_temperature_C)

# ...


heater.py



import machine
import onewire
import ds18x20

HEATER_PIN = 2

class Heater:
    def __init__(self):
        self.water_tmp = 0.00
        self.heater_pin = machine.Pin(HEATER_PIN)
        self.sensor = ds18x20.DS18X20(onewire.OneWire(self.heater_pin))

    def get_water_tmp_C(self):
        rows = self.sensor.scan()

        self.sensor.convert_temp()

        for rom in rows:
            self.water_tmp = self.sensor.read_temp(rom)

        return self.water_tmp


LED . , . 5 :





  • 2
  • 1
  • 1
  • 1


32 , (24V) . , , " ", , , . , . -, , 100% . , .



, API.



LCD , IP , ip . frontend , .







IOT , . MicroPyServer, . , , , try except, .



micropyserver.py



# ...  

def _get_request(self):
        """ Return request body """
        #   4096 ,     MemoryError
        return str(self._connect.recv(1024), "utf8")


:



  • Otomatiskan pekerjaan dengan pencahayaan, sehingga ia sendiri memeriksa pencahayaan di ruangan itu + menciptakan efek matahari terbenam dan fajar, dan cahaya bulan di malam hari.
  • Otomatiskan analisis air
  • Otomatiskan pemanas air
  • Otomatiskan pompa aliran
  • Pengumpan otomatis
  • IsiOtomatis


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