from machine import Pin
import time
import hx711  # your driver module file

# Initialize HX711 with CLK and DAT pins
clk_pin = Pin(17, Pin.OUT)
dat_pin = Pin(16, Pin.IN)

scale = hx711.hx711(clk=clk_pin, dat=dat_pin)

# Optional: Set gain if needed (default is 128)
# scale.set_gain(hx711.hx711.gain.gain_128)

# Wait for sensor settling after power up
hx711.hx711.wait_settle(hx711.hx711.rate.rate_10)

def read_weight():
    try:
        raw_val = scale.get_value()
        print("Raw HX711 value:", raw_val)
        # Convert raw_val to weight by calibration (apply your calibration here)
        # weight = (raw_val - offset) / scale_factor
        return raw_val
    except Exception as e:
        print("Error reading HX711:", e)
        return None

while True:
    weight = read_weight()
    if weight is not None:
        # Example threshold to prevent reverse flow (your logic here)
        if weight < 1000:
            print("Warning: Low saline level detected!")
        else:
            print("Saline level OK.")
    time.sleep(1)