Raspberry Pi Forums

HATHEMI

perfect answer

deleting cmdline.txt solve the problem.
THANKS ALOT.

HATHEMI

i have a raspberryPi4 and 7inch HDMI LCD (B). i want to use the second HDMI port. which configuration should i change in config.txt
thanks in advance

HATHEMI

when i run this command raspistill -t 5 -o image.jpg
i get image with bleu reflect.
but when i run raspistill -o image.jpg i get a good quality image.
i'am using pi camera V1.3.
i don't know where's the problem!!! is it from the timeout?
any help please?

HATHEMI

Are you sure it's an NO pushbutton? Have you checked with a multimeter? yes i'am sure. check this one https://www.google.fr/url?sa=i&url=https%3A%2F%2Fwww.amazon.com%2FTaiss-Momentary-Pushbutton-Switches-Warranty%2Fdp%2FB07GPGMWSW&psig=AOvVaw3wnEcFckEa2q4lJoD9brvE&ust=1596058231832000&a...

HATHEMI

Are you sure it's an NO pushbutton? Have you checked with a multimeter? yes i'am sure. check this one https://www.google.fr/url?sa=i&url=https%3A%2F%2Fwww.amazon.com%2FTaiss-Momentary-Pushbutton-Switches-Warranty%2Fdp%2FB07GPGMWSW&psig=AOvVaw3wnEcFckEa2q4lJoD9brvE&ust=1596058231832000&a...

HATHEMI

Sounds like the internal pull-up isn't being enabled on that pin. I do recall there were some issues with the underlying libraries when the Pi 4B came out. You don't say what Pi you have but it may be worth making sure you have the latest RPi.GPIO library. You can try with what you have by connecti...

HATHEMI

Sorry but I haven't worked with it since decades ago because I'm much smarter now and avoid strange operating systems like vi whenever possible (lol). It does work with all half dozen or so editors I use regularly with Pi (leafpad, mousepad, nano, etc) and the 30 or so other programs. I've yet to e...

HATHEMI

B.Goode wrote: ↑
Tue Jul 28, 2020 4:28 pm

i connect 2 wires to GND and GPIO16.

Can you describe, perhaps by reference to a commonly used diagram such as https://pinout.xyz/, which 2 pins on the 40-way header on your RPi board you are connecting to?

2 wires, pin9(ground) and pin36(BCM16).

HATHEMI

you are right. i'am working with RPi 4 and the latest version of RPi.GPIO libraire. should i install an old version of RPi.GPIO? what causes this difference between pin voltage ? because edge detected depends on voltage value ..! is it a hardware or software problem ? what should i do ? i know it's ...

HATHEMI

ok, i have long wires to the NO button.i connect 2 wires to GND and GPIO16. here's my code import RPi.GPIO as GPIO from time import sleep def pumpButton(): print ("button press", GPIO.input(16)) GPIO.setmode(GPIO.BCM) GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_UP) GPIO.add_event_detect(...

HATHEMI

Hi everyone,
is there a way to verify that bc2835-v4l2 driver is being load succefully on raspberry bootup before using raspistill?

HATHEMI

thanks for reply. i have added start_x=1 in /boot/config.txt and i always get this error when using raspistill command on /etc/profile on startup. in this case should i wait for the driver to get loaded? and how can i know the drivers is beeing completly loaded and i can use camera?

HATHEMI

thanks for reply. i have verified that i only have one client supports raspistill. the problem that my python script runs on startup and it uses raspistill comand. the camera needs enabling in raspi-config before my script will work. that's why it causes this error mmal: mmal_vc_component_enable: fa...

HATHEMI

Any answer here !!!!!!!

HATHEMI

HI everybody, once again this question!. I know this is a common error, but i still can't figure out a solution.will, i have to use raspistill on RPI startup. when the program s running i always get this error mmal: mmal_vc_component_enable: failed to enable component: ENOSPC mmal: camera component ...

HATHEMI

i did but i always got the same problem. it seems that it installed on /usr/local/lib/python3.5 not on /home/pi/.local/lib/python3.7/ sudo pip3 install opencv-python Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Collecting opencv-python Using cached https://www.piwheel...

HATHEMI

after uninstall it i get the same error when runing the script.
python3 prog.py

import cv2
ModuleNotFoundError: No module named 'cv2'

HATHEMI

i did installed it with sudo. but it has installed in local file pi@raspberrypi:~ $ sudo pip3 install opencv-python Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Requirement already satisfied: opencv-python in /usr/local/lib/python3.5/dist-packages (3.4.2.16) Requireme...

HATHEMI

i'am trying to launch a python script on startup.if i run my code with

python3 prog.py

, every thing work fine, except when i run

sudo python3 prog.py

I get following error

ImportError: No module named 'cv2'

i have been searching alot but with no luck. any help PLEASE!

HATHEMI

Hi there.
had you find a solution? can you send me code please?

HATHEMI

here's the error. sudo apt install libgtk2.0-dev libpango1.0-dev libcairo2-dev Lecture des listes de paquets... Fait Construction de l'arbre des dépendances Lecture des informations d'état... Fait Certains paquets ne peuvent être installés. Ceci peut signifier que vous avez demandé l'impossible, ou ...

HATHEMI

apt-cache policy libgtk2.0-dev libpango1.0-dev libcairo2-dev libgtk2.0-dev: Installé : (aucun) Candidat : 2.24.32-3 Table de version : 2.24.32-3 500 500 http://raspbian.raspberrypi.org/raspbian buster/main armhf Packages libpango1.0-dev: Installé : (aucun) Candidat : 1.42.4-7~deb10u1 Table de versi...

HATHEMI

i have tried ton install too many packages but still always get the same error import cv2 File "/home/pi/.local/lib/python3.5/site-packages/cv2/__init__.py", line 9, in <module> from .cv2 import * ImportError: libhdf5_serial.so.100: cannot open shared object file: No such file or directory...

HATHEMI

after turn off raspberry connected with usb device, i have found an empty file inside /media/pi/usb contain the same usb name without beeing connected! for exemple : when i plug my usb i found /media/pi/usb if i turn off power on rapberry then turn it on i found /media/pi/usb and media/pi/usb1 !! ho...

HATHEMI

after almost then more year !! how did you exactly fix it ?i had the same problem and i can't find any other topic speeks about it !

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