# irrigation_control.py - MicroPython on Raspberry Pi Pico
# Uses soil sensor digital wet/dry output for irrigation control
# Sensor digital pin (IN) -> GP15
# Pump/LED control -> GP16

from machine import Pin
import utime

# === Pin assignments ===
DIGITAL_PIN = 15   # soil sensor digital OUT (HIGH=wet, LOW=dry)
PUMP_PIN = 26      # GPIO driving pump/LED (active HIGH)

# === Setup pins ===
soil_digital = Pin(DIGITAL_PIN, Pin.IN, Pin.PULL_DOWN)
pump = Pin(PUMP_PIN, Pin.OUT)
pump.value(0)  # start with pump OFF

print("=== Soil Moisture Irrigation Control ===")
print("Sensor digital pin: GP{} | Pump/LED pin: GP{}".format(DIGITAL_PIN, PUMP_PIN))
print("HIGH = Wet, LOW = Dry\n")

while True:
    soil_state = soil_digital.value()  # 1 = wet, 0 = dry

    if soil_state == 0:   # soil is DRY
        pump.value(1)     # turn pump ON
        print("Soil: DRY -> Pump: ON")
    else:                 # soil is WET
        pump.value(0)     # turn pump OFF
        print("Soil: WET -> Pump: OFF")

    utime.sleep(1)