#import machine
from machine import I2C
from machine import Pin
from lcd_api import LcdApi
from i2c_lcd import I2cLcd
from time import sleep

I2C_ADDR = 0x27
totalRows = 2
totalColumns = 16

S_v=0 # soil sensor value
V_v=0 # valve sensor value
M_v=0 # Motion sensor value

# pin decleration
Relay = Pin(3, Pin.OUT) # Motor for water tank relay (yellow LED)
Valve = Pin(2, Pin.OUT) #  Valve for field relay (red LED)
Speaker = Pin(21, Pin.OUT) # speaker pin 

Soil_sensor = Pin(10, Pin.IN,Pin.PULL_UP) # sensor inpur
Valve_sensor = Pin(11, Pin.IN,Pin.PULL_UP)
Motion_sensor = Pin(12, Pin.IN)

Valve.value(1)
Relay.value(1)

i2c = I2C(0, sda=machine.Pin(16), scl=machine.Pin(17)) #freq=50000 #I2c pins declair
lcd = I2cLcd(i2c, I2C_ADDR, totalRows, totalColumns)

def read_sensor():
    global S_v,V_v,M_v  
    S_v = Soil_sensor.value() # reading soil sensor value
    V_v= Valve_sensor.value()
    M_v= Motion_sensor.value()

while True:   # continious loop system flow
    #lcd.clear()
    lcd.move_to(0,0) # (Colum,row)
    lcd.putstr("Field Irrigation")
    lcd.move_to(0,1)
    lcd.putstr("System          ")
    read_sensor() # reading sensor data
   
    if S_v == 1: # soil moisture low
        lcd.clear()
        lcd.putstr("Activating      ")
        lcd.move_to(0,1)
        lcd.putstr("Valve          ")
        Valve.value(0)
        sleep(1)
        while True:
            #lcd.clear()
            lcd.move_to(0,0)
            lcd.putstr("Valve is Open    ")
            lcd.move_to(0,1)
            lcd.putstr("Watering Field          ")
            sleep(1)
            # print("in while loop")
            read_sensor()
            if S_v == 0:
               Valve.value(1) # LED OFF/Relay OFF
               #lcd.clear()
               lcd.move_to(0,0)
               lcd.putstr("Valve is OFF    ")
               lcd.move_to(0,1)
               lcd.putstr("Field fully moist")
               sleep(1)     
               break
        #print("out of while")
    
    if V_v == 1:
        #lcd.clear()
        lcd.putstr("Activating      ")
        lcd.move_to(0,1)
        lcd.putstr("Water motor      ")
        Relay.value(0)
        sleep(1)
        while True:
             #lcd.clear()
             lcd.move_to(0,0)
             lcd.putstr("Filling   ")
             lcd.move_to(0,1)
             lcd.putstr("Water tank  ")
             sleep(1)
            # print("in while loop")
             read_sensor()
             if V_v == 0:
                Relay.value(1)
                #lcd.clear()
                lcd.move_to(0,0)
                lcd.putstr("Motor is off    ")
                lcd.move_to(0,1)
                lcd.putstr("Tank is full    ")
                sleep(1)     
                break
        #print("outof while")
    
    if M_v == 1: # motion detected
        Speaker.value(1)
        sleep(1)
    elif M_v == 0:    
        Speaker.value(0)

  #  Relay.value(1)
   # lcd.putstr("Lets Count 0-10!")
   # sleep(2)
   # lcd.clear()
   # for i in range(10):
    #    lcd.putstr(str(i))
     #   sleep(1)
      #  lcd.clear()