PROYECTO II B 2024 » Grupo 4B-2024

# -*- coding: utf-8 -*-

import RPi.GPIO as GPIO

import time

# Pines GPIO de la Raspberry Pi

DT = 5  # Pin Data (GPIO 5)

SCK = 6  # Pin Clock (GPIO 6)

# Configuraci?n inicial de GPIO

GPIO.setmode(GPIO.BCM)

GPIO.setup(DT, GPIO.IN)

GPIO.setup(SCK, GPIO.OUT)

class HX711:

    def __init__(self, dout, pd_sck):

        self.dout = dout

        self.pd_sck = pd_sck

        GPIO.setup(self.dout, GPIO.IN)

        GPIO.setup(self.pd_sck, GPIO.OUT)

        GPIO.output(self.pd_sck, False)

        self.offset = 0

        self.scale = 1

    def is_ready(self):

        return GPIO.input(self.dout) == 0

    def read_raw(self):

        while not self.is_ready():

            pass

        count = 0

        for _ in range(24):

            GPIO.output(self.pd_sck, True)

            count = count << 1

            GPIO.output(self.pd_sck, False)

            if GPIO.input(self.dout):

                count += 1

        # Pulso adicional para indicar el fin de la lectura

        GPIO.output(self.pd_sck, True)

        GPIO.output(self.pd_sck, False)

        # Ajuste para n?meros negativos

        if count & 0x800000:

            count -= 0x1000000

        return count

    def tare(self):

        print("Calibrando... Por favor, no coloque peso.")

        time.sleep(5)

        self.offset = self.read_raw()

        print("Calibracin completa. Puede colocar peso.")

    def get_units(self, readings=10):

        total = 0

        for _ in range(readings):

            total += self.read_raw() - self.offset

        average = total / readings

        return average / self.scale

    def set_scale(self, scale):

        self.scale = scale

def main():

    scale = HX711(DT, SCK)

    # Configuraci?n inicial

    scale.set_scale(500)  # Ajustar despu?s de calibrar

    scale.tare()

    try:

        while True:

            if scale.is_ready():

                weight = scale.get_units(10)  # Leer el promedio de 10 muestras

                print(f"Peso: {weight:.2f} g")

            else:

                print("Esperando al sensor...")

            time.sleep(1)  # Leer cada segundo

    except KeyboardInterrupt:

        print("\nSaliendo...")

    finally:

        GPIO.cleanup()

if __name__ == "__main__":

    main()