Gpod no funcion

#1

I’m stuck, I have an ultrasonic distance sensor and two motion sensors with a level jump because both work at 5v and I pass it to 3v3, I have put its resistance on the level jump, with gpiod in python I can’t receive any signal, apparently everything is fine, can someone help me?

#2

please show me the sensor link and your code so that I can help.

#3

IMG_20250312_161644
IMG_20250312_161644.jpg1800×4000 2.16 MB
IMG_20250310_185713
IMG_20250310_185713.jpg1800×4000 2.22 MB

#!/usr/bin/env python3

SPDX-License-Identifier: GPL-2.0-or-later

SPDX-FileCopyrightText: 2023 Kent Gibson warthog618@gmail.com

import gpiod
from gpiod.line import Direction, Value
import time

def medir_distancia(chip_path, trig_offset, echo_offset):
# Solicitar la línea TRIG como salida y ECHO como entrada
with gpiod.request_lines(
chip_path,
consumer=“ultrasonic-sensor”,
config={
trig_offset: gpiod.LineSettings(direction=Direction.OUTPUT, output_value=Value.INACTIVE),
echo_offset: gpiod.LineSettings(direction=Direction.INPUT)
}
) as request:
while True:
# Generar un pulso en TRIG
request.set_values({trig_offset: Value.INACTIVE})
time.sleep(0.002) # Pausa para estabilizar
request.set_values({trig_offset: Value.ACTIVE}) # Pulso alto (10 µs)
time.sleep(0.00001)
request.set_values({trig_offset: Value.INACTIVE}) # Regresar a bajo

        # Inicializar las variables de tiempo
        start_time = 0
        end_time = 0

        # Medir el tiempo en ECHO
        timeout = time.time() + 1  # Configura un tiempo límite de 1 segundo para evitar bucles infinitos
        while request.get_value(echo_offset) == 0:  # Espera señal alta en ECHO
            start_time = time.time()
            if time.time() > timeout:
                print("Error: Tiempo de espera agotado para señal alta en ECHO.")
                break

        while request.get_value(echo_offset) == 1:  # Medir tiempo mientras ECHO está alto
            end_time = time.time()
            if time.time() > timeout:
                print("Error: Tiempo de espera agotado para señal baja en ECHO.")
                break

        if start_time and end_time and end_time > start_time:
            # Calcular la distancia en base a la duración del pulso
            duration = end_time - start_time
            distance = (duration * 34300) / 2  # Velocidad del sonido en cm/s
            print(f"Distancia: {distance:.2f} cm")
        else:
            print("Error: Señal ECHO no detectada correctamente.")

        # Pausa antes de la siguiente medición
        time.sleep(1)

if name == “main”:
try:
medir_distancia("/dev/gpiochip4", 21, 19) # TRIG en línea 21, ECHO en línea 19
except Exception as e:
print(f"Ha ocurrido un error: {e}")

#4

Other example
#!/usr/bin/env python3

SPDX-License-Identifier: GPL-2.0-or-later

SPDX-FileCopyrightText: 2023 Kent Gibson warthog618@gmail.com

import gpiod
from gpiod.line import Direction, Value
import time

def medir_distancia(chip_path, trig_offset, echo_offset):
# Solicitar la lí?nea TRIG como salida y ECHO como entrada
with gpiod.request_lines(
chip_path,
consumer=“ultrasonic-sensor”,
config={
trig_offset: gpiod.LineSettings(direction=Direction.OUTPUT, output_value=Value.INACTIVE),
echo_offset: gpiod.LineSettings(direction=Direction.INPUT)
}
) as request:
while True:
# Generar un pulso en TRIG
request.set_values({trig_offset: Value.INACTIVE})
time.sleep(0.002) # Pausa para estabilizar
request.set_values({trig_offset: Value.ACTIVE}) # Pulso alto (10 µ?s)
time.sleep(0.00001)
request.set_values({trig_offset: Value.INACTIVE}) # Regresar a bajo

        # Inicializar las variables de tiempo
        start_time = 0
        end_time = 0

        # Medir el tiempo en ECHO
        timeout = time.time() + 1  # Configura un tiempo lí?mite de 1 segundo para evitar bucles infinitos
        while request.get_value(echo_offset) == 0:  # Espera señ?al alta en ECHO
            start_time = time.time()
            if time.time() > timeout:
                print("Error: Tiempo de espera agotado para señ?al alta en ECHO.")
                break

        while request.get_value(echo_offset) == 1:  # Medir tiempo mientras ECHO está? alto
            end_time = time.time()
            if time.time() > timeout:
                print("Error: Tiempo de espera agotado para señ?al baja en ECHO.")
                break

        if start_time and end_time and end_time > start_time:
            # Calcular la distancia en base a la duració?n del pulso
            duration = end_time - start_time
            distance = (duration * 34300) / 2  # Velocidad del sonido en cm/s
            print(f"Distancia: {distance:.2f} cm")
        else:
            print("Error: Señ?al ECHO no detectada correctamente.")

        # Pausa antes de la siguiente medició?n
        time.sleep(1)

if name == “main”:
try:
medir_distancia("/dev/gpiochip4", 21, 19) # TRIG en lí?nea 21, ECHO en lí?nea 19
except Exception as e:
print(f"Ha ocurrido un error: {e}")

#5

Have you tried adjusting the intervals?

#6

And how do I do that? Or am I missing a permission? I access the GPIOs but I don’t receive anything, and when I enter rsetup and monitor the GPIOs, it says (E), error in the pins used.

#7

rsetup prompts that the GPIO is occupied, then you need to see if your program is using this GPIO, if it is not being used by your program, you can tell me exactly which GPIO, I will help you to confirm whether it is being occupied by the kernel.

#8

Hello, well, sorry, what happened is that on the jump start board I didn’t connect the GND to the same GND as the rest of the components and the motion sensors when powered by 5V I wasn’t sure whether to connect to the jump start board and in the end by informing myself I was able to see that the motion sensors have a 3v3 output and it is not necessary to connect them to the jump start and regarding the GPIOD library in Python, I have been able to experience that the MRAA library is much easier to use and it is the one I am using today.