from machine import Pin
import time
from hx711 import HX711  # Wokwi's built-in HX711 library

# Initialize HX711 (GPIO5 = DT, GPIO6 = SCK in Wokwi)
hx = HX711(dout_pin=5, pd_sck_pin=6)

# Calibration variables (adjust these in simulation)
zero_offset = 0
calibration_factor = -1000  # Negative because load cells give negative values

def calibrate():
    global zero_offset
    print("Calibrating... Remove all weight from the load cell")
    zero_offset = hx.read()
    print(f"Zero offset set to: {zero_offset}")
    time.sleep(1)

def read_weight():
    raw = hx.read() - zero_offset
    weight = raw / calibration_factor  # Convert to grams/kg