from time import sleep_ms, ticks_ms, sleep, time
from machine import I2C, Pin 
from i2c_lcd import I2cLcd 
import dht
from hx711 import HX711

AddressOfLcd = 0x27
i2c = I2C(scl=Pin(22), sda=Pin(21), freq=400000) # connect scl to GPIO 22, sda to GPIO 21
lcd = I2cLcd(i2c, AddressOfLcd, 2, 16)

#DHT22 Sensor
cb_dht = dht.DHT22(Pin(33))
time_dht = 0
doC = 0
doam = 0
motor_quat = Pin(23, Pin.IN)

#Loadcell Sensor
hx = HX711(dout = 15, pd_sck = 4)
hx.set_scale(206580) #208460
hx.tare()
weight_gram = 0
time_weight = 0
motor_can = Pin(18, Pin.IN)

def get_dht():
    global time_dht
    global doC, doam
    if time() - time_dht >= 2:
        try:
            cb_dht.measure()
            doC = cb_dht.temperature()
            doam = cb_dht.humidity()        
        except OSError as e:
            print('Failed to read sensor.')
        time_dht = time()

def get_weight():
    global time_weight
    global weight_gram
    if time() - time_weight >= 1:
        weight_kg = hx.get_units(10)
        weight_gram = 0
        for i in range(9):
            weight_gram += weight_kg*1000
        if (weight_gram/10) < 0:
            weight_gram = 0
        
        # blynk.virtual_write(3, round(weight_gram/10))
        time_weight = time()
        
def testLcd(num):
    lcd.move_to(3,0)
    lcd.putstr('Micropython')
    lcd.move_to(0,1)
    lcd.putstr("hello " + str(num))
while True:
    for i in range(10):
        testLcd(i)
        sleep_ms(200)
    get_dht() 
    print("Nhiet do:",doC)   
    weight_gram()
    print("Can nang:", weight_gram)