Questions tagged [pi-4]

For questions that apply specifically to the Raspberry Pi 4 and not other/all models.

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12 views

Raspberry Pi Imager corrupted image file of my Raspbian OS [closed]

Recently I downloaded image file of Raspbian bullseye release and last release of buster , when i flashed them using Raspberry pi Imager the SD card did got flashed but both of these files got ...
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19 views

Pi Camera 1.3 not detected despite v4l2-ctl listing it

Before you say that I haven't searched the internet, whenever I type "pi camera not detected" I literally don't see a single unclicked result. I am slowly breaking apart. PI 4 (8gb), V1.3 ...
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11 views

Nothing else than the ARMv7 RaspiOS is bootable for me

I just bought 2x 32GB Micro SDCards (100MB/s Read, 90MB/s Write) and tried flashing the ARMv7 RaspiOS onto them for both of my 2 Raspberry Pi 4B 8GBs. This is working as intended. But as soon as I'm ...
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1answer
46 views

Raspberry Pi 4 Working Slow

I am beginner to the raspberry pi , I bought a pi 4 model b with 8GB ram, since last 3 weeks I'm encountering multiple issues with it and one of them is its "SLOW PERFORMANCE", I've tried ...
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11 views

How to combine ssmtp with License Plate Recognition on Python and Sudo Nano

I need help with combining ssmtp on both python and Sudo nano for my Raspberry Pi 4 Model B, as I have setup the ssmtp for Raspberry Pi with the codes below: sudo apt-get install ssmtp sudo nano /etc/...
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8 views

How to change the menu Icon in Bullseye

I am running raspbian Bullseye and I want to change my launch icon. I saw this question for an older raspberry pi os, How to change the Menu Icon in Raspbian but none of the answers worked for me. I ...
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12 views

Need help overlaying an application window over camera screen

I made a python code where it will launch the pi camera and I can use buttons to record a video for 30 seconds or take pictures. In this python code, I mixed in another python script where I can ...
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1answer
21 views

How to remove snap-store from Rpi-4b Debian Buster?

I need to reinstall snap-store. I would be thankful if someone would tell me the commands to uninstall or reinstall it. You can see the reason why I need to install snap-store again here: Unable to ...
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1answer
18 views

Installing openCV: Bash cmake command not found

I get an error return from typing the codes below: cmake -D CMAKE_BUILD_TYPE=RELEASE \ > -D CMAKE_INSTALL_PREFIX=/usr/local \ > -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \ > -D ...
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2answers
31 views

Phone charger for powering Pi 4?

Good day, I just bought the Raspberry Pi 4 Model B 2GB RAM and I forgot my charger at my house which I won't be able to get to in a few weeks. I was wondering if I could power the Raspberry Pi using ...
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11 views

Do I only need the RPI 4B+ Board for the Crowpi2?

I'm thinking about getting the Crowpi2 (exact model) and I'm getting the basic kit, which does not include an RPI. What if I just get the Raspberry Pi board and the laptop? Do I need anything else? I ...
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9 views

Display has a Blackout

I have a Raspberry Pi 4 and it is connected to the 10.1" Touch Screen from SunFounder. A Relais is connected to Pi and the Pumps are connected to a 12V power supply. The 5V for the Relais comes ...
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1answer
32 views

License Plate Recognition System: Error writing /etc/ssmtp/ssmtp.conf smpt: No such file or directory

I faced an error which is Error writing /etc/ssmtp/ssmtp.conf smpt: No such file or directory, when typing root=postman mailhub=smpt.gmail.com:587 AuthUser=youremail@gmail.com AuthPass=...
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22 views

License Plate recognition System pip install pytesseract error

I have an error when entering the pip install pytesseract command, here is the tutorial of the project that I am working on: https://iotdesignpro.com/projects/real-time-license-plate-recognition-using-...
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1answer
28 views

License Plate Recognition System dpkg: error need an action option

I faced an error which is dpkg: error need an action option, when typing sudo dpkg - -configure –a into the raspberry pi based on this tutorial https://iotdesignpro.com/projects/real-time-license-...
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17 views

Raspberry Pi 4 issues [closed]

it's new issue everyday with my raspberry pi, 3 weeks ago my pi got off because the adapter was a bit loose in the socket and after that I'm encountering a some issues, I have to submit my final year ...
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1answer
33 views

Looking for project suggestion which uses Raspberry Pi to create IoT Parking Apps with Car Plate Recognition

I would like to know is there any complete license plate recognition projects which are using Raspberry Pi 4 model B as I can't find any complete relevant projects with full source codes or tutorials ...
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1answer
46 views

How can Rpi4B use python to talk to the I2C DHT20 / SHT20 temperature and humidity sensor?

I'm trying to use a Raspberry Pi 4 to read an I2C temperature and humidity sensor. The part I'm using is a module from Grove based on the DHT20 sensor. Here's a link to a page about the module: https:/...
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0answers
40 views

unable to connect wifi in raspberry pi 4

it's been like 2 weeks since my raspberry pi is behaving abnormally, it's new issue with it everyday, this time it's the wifi which can't connectit gives error of "wpa_supplicant" file, i ...
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2answers
26 views

IR not working on Pi 4 - how to troubleshoot?

I've sunk about a week into trying to receive infrared on RPi v4. I've worked through the LIRC docs and a number of tutorials. I am using the VS1838 IR receiver. I actually have 2 which I've been ...
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0answers
19 views

Boot Raspberry Pi 2 with SD card from Raspberry Pi 4

I have a working setup inside SD card, which I used on Raspberry Pi 4 successfully and now I want to use it also on Raspberry Pi 2. Currently I cannot make it run. It shows always initial multicolored ...
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1answer
36 views

Can a Pi 4 manage a home surveillance network of 4 or 5 FHD cameras?

I need to set up a CCTV system for my home on the other side of the world as it's near a sketchy stretch of the alley that I can monitor from here. I need at least 4 to cover 4 sides and possibly a ...
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1answer
22 views

Using Raspbian OS Debian 11 Bullseye cannot get second hdmi monitor to set to anything other than 4K

Tried: using raspi-config.Setting second and first monitor to 1920*1080 editing /boot/config.txt hdmi_group=1 hdmi_mode=16 Screen Configuration tool.Found in GUI menu. This tool shows second screen ...
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2answers
96 views

Is the latest Raspberry Pi OS Bullseye trustable?

I,m thinking of upgrading my Pi-Os and I do not know for sure if Bulleseye is fully trustable and might have a glitch on me. Does it have aney problems, can I trust it, or is it dangerous or hard to ...
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0answers
42 views

Raspberry Pi 4 booting/working slow

Recently my RPi 4 got crashed and I had to reboot my sd card with OS, I was using the Raspbian's 7th april 2021 release, but when I loaded it again my pi started working slow it even booted in 2-3 ...
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0answers
16 views

USB built in port problem

Description of problem: I had installed RetroPie, then installed drivers packages from the drivers packages that I knew that would not work with the Pi 4, then when I went to reboot the Raspberry Pi 4,...
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0answers
35 views

Raspberry Pi 4 Model B Project: IoT Parking Apps with Car Plate Recognition for Smart City using Node Red

recently I found a project that involves using Raspberry Pi and Arduino Mega Board to create a Car Plate Recognition system but I am stuck with connecting the pins as I am not a professional in using ...
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1answer
104 views

Fix error "Failed to start DHCP Client Daemon" after upgrade to "Bullseye" remote?

I did an upgrade to Bullseye and rebooted. I can't login with ssh (also he does not answer ping) and on screen I see the error Failed to start DHCP Client Daemon. Now the big problem: the pi password ...
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0answers
24 views

What are the correct wire terminals for this limit switch? [closed]

What is the correct name/type of these female wire terminals? A link to a product page would be greatly appreciated. I'd like to crimp them to cables that connect a limit switch to RPi GPIO pins. See ...
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0answers
25 views

How to install different OS rasbberry pi 4 using m2 ssd argon case

I have just bought the Rasbberry pi 4 along with the argon m2 case and boot it with an ssd installed with Ubuntu. I want to install a different OS onto the ssd. How could I do it ?
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1answer
22 views

Is it safe to drive the ENA+, DIR+ and PUL+ ports of a stepper motor driver with a 3.3v pin from the RPi 4 GPIO header?

I'm using this Cloudray 2-phase stepper motor driver DM422S to drive this Cloudray Nema 17 stepper motor (52Ncm 1.8A). I connected the signal ports for ENA+, DIR+ and PUL+ of the motor driver to the 3....
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80 views

Raspberry Pi4 Camera supported=0

I have a Raspberry Pi 4 Model B and I am trying to connect the board with Raspberry Pi camera module. I made sure that the camera is connect correctly to the insertion slot. And the camera is enabled ...
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16 views

Problem with connectig raspberrypi 4 through BT with smartfone

When I try connect smartfone with raspberry , pairing is O.K. but i receive information - " Connection failed. No usable services on this device". On Ubuntu with the same Raspberry and ...
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0answers
27 views

What version of HDMI do the Raspberry 4 and the Zero W have?

I expected this to be easy to determine by googling, but apparently not. What version of HDMI (e.g. 1.4, 2.0 etc) does the Raspberry Pi 4 have? What about the Zero W? Thanks.
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1answer
73 views

Unable to install Snap-Store on Rpi-4b

I have had a problem with snap-store app on my raspberry pi. I installed it using these steps that I found on line in the command line: sudo apt update sudo apt install snapd sudo reboot sudo snap ...
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17 views

How to use ctr + alt

So I am German and usually "ctrl + alt + Q" makes the @ (email) symbol. On my Raspberry Pi 4. However, after changing the keyboard language to German, I can't seem to access any characters ...
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1answer
57 views

Can I add a second processor to pi 4b 8gb? Is it even possible?

I want to get more than the most possible performance out of my pi 4b. I was looking around, and I saw it was possible to get just the processing unit for the pi 4 without the rest of the pi. I ...
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1answer
36 views

Trying to setup a Raspberry Pi 4 as a linked wifi/ethernet router

Thanks for the help with this. My colleague and I are trying to setup a RPI 4 as a router not connected to the internet. It is just for the purposes of connecting multiple wifi controllers together. ...
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0answers
44 views

maximum overclocking values (all of them)

what are the maximum values for h264_freq, isp_freq, v3d_freq and hevc_freq on the raspberry pi 4 model b? one more thing, does setting over_voltage_sdram give any improvement in performance?
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28 views

Raspberry Pi | Data Communication | Process Data

I need to receive electricity data from a charge controller with a raspberry pi and process these data on the hmi screen. How can I get accurate information about raspberry pi data communication, how ...
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0answers
20 views

How would I be able to connect a Raspberry Pi CM4 to another PCB that has extra IO?

How would I be able to connect a Raspberry Pi CM4 to another PCB that has extra IO? I would be thinking some sort of ribbon cable but I am also interested in how the Pi top connects its two PCBs.
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35 views

Kdenlive not working when i open it

When i open kdenlive in raspberry pi os(the newest one bullseye) it crashes after opening it. I download kdenlive like this= sudo apt install kdenlive and if i run kdenlive in terminal i get this: ...
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12 views

Is Pi 4 in Access Point mode slower than as a WiFi client?

I see multiple sources that confirm that the Pi 4 can reach practical WiFi transfer speeds of ~100 Mbps as a WiFi client. When I follow this tutorial on turning it into a wireless access point, ...
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0answers
15 views

Unable to open pycharm on raspberry pi 4

when i type ./pycharm.sh in terminal it throughs the following error: "Error occured during intialization of VM java/lang/ClassFormatError: Unknown constant tag 101 in class file java/lang/...
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2answers
26 views

Booting issues with pi 4

My raspberry pi isn't booting, I get the rainbow splash screen then the raspberry pi icon then the system crashes with no logs or any reason for crashing. I have tried the software NOOBS and followed ...
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1answer
27 views

Set up multiple WiFi Networks (Phone hotspots)

I want to be able to connect through different phones' hotspots (Pi4 - operating system of last June - the Pi has a static IP). I am only able to connect to the latest phone that was connected and ...
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0answers
20 views

MC Bedrock Server with existing world on Raspberry Pi4

Me and my friends have a MC PE survival world, and we can only play when I am online (As the game is on my device). I was looking into putting the game onto a raspberry pi4 so anyone can play whenever,...
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0answers
22 views

how to install chrome on rpi4? not a duplicate, i need answer [duplicate]

Does anyone know how to install chromE(not chromIUM) on a raspi 4 without virtualization and stuff like exagear? i dont really care if it is hard to do but i need chrome on raspi4 running latest raspi ...
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0answers
31 views

How to decode Chevy TPMS on 315Mhz using RTL_433

I'm trying to decode Chevy TPMS signals from this ACDelco sensor. Its a 315Mhz sensor. This is the FCC datasheet for the sensor. I have this activation tool for the sensors I have a Raspberry Pi and ...
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0answers
24 views

Thonny returns error when installing nextcord.py package

When trying to install nextcord.py from the thonny package manager, this exception is raised, no matter the version: Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple ...

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