import machine
import utime
from RPi_I2C_driver import i2c_lcd
from RPi.GPIO import GPIO

# Define GPIO pins
relay_pin = 17
moisture_sensor_pin = 18

# Initialize the relay and moisture sensor
relay = GPIO(relay_pin, GPIO.OUT)
moisture_sensor = machine.Pin(moisture_sensor_pin, machine.Pin.IN)

# Initialize the LCD
lcd = i2c_lcd.i2c_lcd(0x27, 1, 2, 16)
lcd.backlight()

def water_plants():
    lcd.lcd_clear()
    lcd.lcd_display_string("Soil is dry.", 1)
    lcd.lcd_display_string("Watering plants...", 2)
    
    relay.value(1)
    utime.sleep(10)  # Run the pump for 10 seconds (adjust as needed)
    
    relay.value(0)
    lcd.lcd_clear()
    lcd.lcd_display_string("Watering complete.", 1)

while True:
    if moisture_sensor.value():
        lcd.lcd_clear()
        lcd.lcd_display_string("Soil is moist.", 1)
    else:
        water_plants()
    
    utime.sleep(3600)  # Check moisture every hour (adjust as needed)