Questions tagged [pi-4]

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

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RPI4B OV5647 Camera black screen!

Hi i recenlty bought a camera for my RPI4B but for some reason it's not working, whenever i enter libcamera-hello or rpicam-vid i get this error new@raspberrypi:~/rpicam-apps $ rpicam-vid [0:13:59....
user21184434's user avatar
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Docker Image with audio acess not working, wrong output device

I am running a Raspberry Pi 4 with Ubuntu 22.04 connected to an Elecrow 7inch LCD Display-H 1024x600 that has an audio jack for headsets and comes with two speakers. I am trying to setup a docker ...
K. Meyer's user avatar
1 vote
0 answers
30 views

Installing TensorFlow Lite dependencies and OpenCV

I am getting this error while running this command "bash get_pi_requirements.sh" to Install TensorFlow Lite dependencies and OpenCV for my object detection project. What could be the issue ...
Suprio Barua's user avatar
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28 views

Triggerhappy failing on 64 bit Bookworm on Raspberry Pi 4B

I am testing the new Bookworm 64 bit https://downloads.raspberrypi.com/raspi ... 023-12-06/ on Raspberry Pi 4B. During boot, the triggerhappy udev rule is failing and board doesn't boot up. Steps: ...
Preeti 's user avatar
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USB devices changes ttyACM and device rumber on automatic reconnect

I have a Quark elec AIS receiver connected to my raspberry pi 4 and after some randon amount of time it disconnects en reconnects. After this the device number and the ttyACM* number changes. See the ...
Daan's user avatar
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25 views

ras pi 4 has terrible video rendering performance when streaming in vnc and firefox.Do i need to install specific drivers

I cant understand why either my raspberry pi 3 or my pi 4 wont adequately stream video from youtube . It is unbearbly choppy and sluggish.
Patrick Mcgrory's user avatar
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1 answer
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How to disable sysrq on UART

I am trying to talk to a device over serial (ttyAMA0 or serial0) and it works, but sometimes I get the following TX from my rpi4, which crashes the device I talk to: [22763.820857] sysrq: HELP : ...
tester's user avatar
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Boot issue while using u-boot with Raspberry Pi 4 in 32-bit

I am trying to integrate 32bit u-boot for Raspberry Pi 4B 32bit. Below are my steps: Installed Raspbian (bookworm) 32bit on SD card using Raspberry Pi Imager. Built u-boot binary using ...
Preeti 's user avatar
  • 131
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1 answer
20 views

Trying to understand the under voltage issue

Using this script to provide a power report, I am getting the following while powering the Pi with iPhone power brick and the official Raspberry Power supply brick: -- using official Raspberry Pi ...
AngryHacker's user avatar
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1 answer
20 views

How can I add media on an external drive to Jellyfin?

I've just installed Jellyfin on my Raspberry Pi 4 using this guide. When I try to add a library from my external SSD, I get the error "The path could not be found. Please ensure the path is valid ...
WalrusMonger's user avatar
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1 answer
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RPi4 - pigs bscx SPI slave not working

I have an ESP32 set to an SPI Master with 100kHz, Mode 2 and just want to send 0x19 to the RPi4 as a slave running pigpiod and using shell for output. When I use piscope, everything seems fine for me ...
karlo922's user avatar
-1 votes
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43 views

I don't have a raspberry pi, but I need to test my code

I want to do the astro pi project and I have my code, but I have no way of testing, I don't have a raspberry pi but in theory my code should work, if someone could test it or look for mistakes I'd be ...
Sasmit Sahay's user avatar
0 votes
1 answer
18 views

Problems With AutoConnections Wifi

I have a raspberry pi 4 with latest version of raspian and i want 2 things: 1 - static IP for eth0 port, so that I can guarantee access via ssh without any monitor. 2 - configure a wifi network via ...
FelipeFonsecabh's user avatar
0 votes
1 answer
19 views

Error when running python read.py and write.py (MFRC552) library

so im getting an error while setting up my RFID552 on RP 4B i downloaded this library https://github.com/mxgxw/MFRC522-python When I run the Read.py, i get an error saying error in line 33 which is ...
user21184434's user avatar
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Enabling MCP251xD on SPI4 on the Rpi4

We have a hardware in which the MCP2518FD is connected to the SPI4 of the Raspberry Pi 4.It appears that the existing driver allows for SPI0 and SPI configurations only. Please guide how to configure ...
Abdul Samad's user avatar
0 votes
2 answers
47 views

How to Turn Off Red Idle LED Light on Raspberry Pi 4 When Device is Turned Off

On a Raspberry Pi 4, and I've noticed that the red idle LED light remains on even when the device is turned off. While I understand this might be a default behavior, I'm looking for a way to turn off ...
user3607022's user avatar
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Failed to initiate p2p connection between raspberrypi4 and linux Laptop

currently, I am working on a P2P connection between Laptop and Rpi4 facing interface creation fail issue while using wpa_supplicant to create a connection between the laptop and Raspberry Pi 4B to ...
Reddy Bhargavi's user avatar
0 votes
1 answer
35 views

Anyone knows what this part is on RPi 4? Need help identifying it

something went wrong. After fresh Ubuntu installation Pi got stuck at bootloop. After a few times of crashing and rebooting i guessed bad ISO so i wanted to take the card out. That's how i ended up ...
Brat Lemi's user avatar
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14 views

Best environment for interactive installation?

I'm gathering some hardware for a permanent interactive wall installation that will utilise Pi 4 and some touch sensors via GPIO. The Pi will be hooked up to a video projector and a speaker. The idea ...
ALx's user avatar
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34 views

Need help troubleshooting my Raspberry Pi 4 Model B

I'm a beginner and I need help troubleshooting my Raspberry Pi 4 Model B. Trying to troubleshoot it in order to activate the camera module, which was being supported and detected when running vcgencmd ...
raspiagrp's user avatar
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Best way to program on the GPU?

So I have a project where over-heating and performance are crucial. So I came up with 2 ideas from the get go; Only compile a kernel without an OS and run my algorithms on the GPU. On PC environment, ...
Turgut's user avatar
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Why do I have no entries in Screen Layout in Bookworm/Pi 4

I recently moved to Pi 4 and installed Bookworm using the Imager. I then switched to X11 from Wayland and changed the resolution - both using raspi-config. I also set a static address and finally ...
Chiwda's user avatar
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Phone charger power supply for raspberry pi 4

I have a Motorola power supply with output: 5v 3a 15w or 10v 2a 20w or 12v 1.67a 20w. My question is: can I use this power supply for my raspberry? Or is there a risk that it could be burned or ...
Juani Zappulla's user avatar
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19 views

Local Wireless NIC Monitor Mode

I was wondering if anyone here has been able to get local the local wireless NIC on monitor mode on RASPIAN 11? (pi4)
MysteriousSol's user avatar
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1 answer
30 views

Can you use/interchange the same Ubuntu Desktop 23.10 sd-card in a Raspberry Pi 4 and a Raspberry Pi 5?

I have both a Raspberry Pi 4 and a Raspberry Pi 5, and I am wondering if it is safe and successful to use a Ubuntu Desktop 23.10 formatted SD-Card between the two (ie. use it in the rpi4 for a while, ...
balupton's user avatar
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0 answers
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Power cycle 3V3 during reboot

I have read about having the PI4 turn off 3V3 on shutdown via the eeprom settings, WAKE_ON_GPIO=0 and POWER_OFF_ON_HALT=1, and verified that his works on my PI4. I would really like, though, to power ...
jnob's user avatar
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26 views

Does I2C clock also change if system clock is altered? Pi4

SPI clock speed is tied to system clock so for example of the system clock changes the SPI changes. To prevent this you need to prevent power scaling/fix the frequency. Is this also the case for I2C ...
FourierFlux's user avatar
0 votes
1 answer
27 views

How to make the desktop color transparent, or remove the desktop color?

I set the desktop background image to a transparent png image. I want the desktop color to be transparent as well. Because I want to put the GUI on a transparent screen. I manually changed the ...
user160194's user avatar
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Create Wireless Access Point Without Ethernet

Using the built-in WiFi hotspot configuration GUI, I realize that there isn't any way to make this hotspot provide an internet connection without an Ethernet cable or WiFi adapter. I'm in a really ...
idontknowwhattoputhere's user avatar
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I don't understand why I can't read the same values between a Modbus server and a Modbus client using the library pyModbusTCP

I have a problem with a modbus connection with Raspberry pi 4B, let me explain what's going on. I'm using the pyModbusTCP and I'd like to be able to read the values of coils in a Modbus server on the ...
RPI974's user avatar
  • 1
0 votes
0 answers
38 views

Setup access point on wlan0 and static ip for eth0 on RPi 4

On the one hand, I'd like to create an access point from RPi, without internet, because it's just to be able to connect remotely via ssh. On the other hand, I'd like to be able to connect an ethernet ...
hgdly's user avatar
  • 1
0 votes
1 answer
54 views

Hosting a lavalink server and connecting to it at the same time fails

I am running a discord bot that requires voice commands in my Raspberry Pi 4, and installed OpenJDK 17.0.1 on it. I also used pyenv to install python 3.10 on the Pi, and set the version to be global. ...
LuckElixir's user avatar
0 votes
0 answers
45 views

Pi4 Slow performance in local network over wi-fi

I'm running Pi4 4Gb as my Time Machine and Media Storage via smb server + PiHole. Speeds were always inferior, but I suspected problem was WD My Passport with HFS+ (for time machine) and exfat ...
user11686813's user avatar
0 votes
0 answers
19 views

Raspbian screensaver fails with VNC on Pi4

I have activated the screensaver on Rasbian. I have the raspberry 7" touch screen. All works well manually, switches screen of after a certain amount of inactivity and comes on again when the ...
monorfolk's user avatar
0 votes
1 answer
87 views

Where is my WiFi configuration configured in Raspberry Pi Imager?

I can't find WiFi configuration that I entered during Raspbian installation. I have fresh Raspberry Pi 4 with default Raspbian x64 system installed on SD card by using Raspberry Pi Imager 1.8.4. ...
Kamil's user avatar
  • 396
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0 answers
19 views

ALSA lib PyAudio Errors with ReSpeaker v2.0 USB Mic Array and Raspberry Pi 4B

I have been having problems using the pyaudio library to access raw audio data from the ReSpeaker Mic Array v2.0 microphones. The example script below is provided from the link above, and it's ...
Cole Sheyka's user avatar
1 vote
0 answers
58 views

Raspberry Pi 4B & ReSpeaker v2.0: PyAudio Errors and ALSA Configuration Issues

OS: Raspberry Pi OS (64 bit) - Debian Bookworm As a forewarning, I am a novice when it comes to IoT projects like this. My purpose is to implement my own custom python script which considers direction ...
Cole Sheyka's user avatar
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0 answers
30 views

RaspberryPi 4b won't boot from SD card anymore

I have used my RaspberryPi 4B multiple times with the same sd card. Everything worked perfectly fine. To test if the RaspberryPi fits in a case I got for it, I removed the sd card. After putting it ...
Emily's user avatar
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1 vote
0 answers
30 views

Redirect U-Boot console to UART2 in RPi 4B

This is similar to this question, but for different hardware and with some things already tried. My ultimate goal is to have bluetooth on UART0 and debug on UART2. I use RPi 4B and need to redirect U-...
Adam Trhon's user avatar
-2 votes
1 answer
42 views

Raspberry Pi - hosting website - change index.html - where to put other .html files and folders?

I have installed Nginx on a Rasperry Pi 4 to host a website. I can see the default nginx index.html on my IP Address 192.0.9.11 (example IP) I just have a few questions: What can I use to edit the ...
Robert's user avatar
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0 votes
2 answers
48 views

SD card is completely unrecoverable - permanently in readonly state

My Raspberry Pi 4 SD card is completely unrecoverable. Not sure if it is due to power failure during write or some other reason but it has left the SD card unrecoverable and un-reformattable. Tried ...
Ram's user avatar
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0 votes
0 answers
65 views

How to enable a fastApi server on startup?

im looking for solution, how to edit some files to specify which bash file (it's called startupScript.sh) should start after booting the device. I'm using bash version, without GUI. But the script ...
M0nk3y's user avatar
  • 1
0 votes
1 answer
152 views

Why does wifi stops working randomly on a Raspberry Pi 4B rev1.4 while the wlan0 interface stays available?

I've been trying to debug this issue, with great frustration as I'm printing using (Rasbian based) OctoPi and cannot reboot the Pi during printing. I have two similar setups running OctoPi on their ...
Bob Ortiz's user avatar
  • 111
0 votes
1 answer
29 views

using logic level converter between my led ring and raspi 4 but it is not working

I am working on a small project where I am using a SparkFun Lumini LED Ring. The power supply for the ring is external, connected via its own cable and power adapter. The link of the datasheet of the ...
xcido's user avatar
  • 1
0 votes
0 answers
61 views

Resistor or Capacitor Broke off Raspberry Pi 4 B left to the PWR text

So my problem is that a component on my Raspberry Pi 4 B has broken off to be exact its the resistor or Capacitor of the image shown below. My best guess is that it is simply a resistor which is part ...
AbstractDev's user avatar
0 votes
1 answer
65 views

Help with Access Point configuration, please

I'm running Debian v.12 on a Pi4B, and I'm having trouble getting my wifi Access Point to work. Specifically, I want the Pi to act as a local server without being connected to the house network. The ...
PangolinGold's user avatar
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0 answers
25 views

Can't send document files from pi to my phone or laptop on bluetooth (it is showing up as audio)

Running Debian version 12 on a Pi4B. My pi is my typewriter, and I want to send document (WordGrinder) files from the pi to my Pixel phone (or laptop) over bluetooth. I have a strong bluetooth ...
PangolinGold's user avatar
0 votes
2 answers
175 views

Raspberry Pi Infinitely asks for WiFi password and won’t connect after switching to ssd

I have a raspberry Pi 8 GB, running Raspberry Pi OS 12 Bookworm 64 bit. I just switched from the SD card to an SSD as my main storage by using the SD card copier app included in Raspberry Pi OS to ...
Lem0n_C0der's user avatar
0 votes
0 answers
16 views

Manjaro On Raspberry Pi 4

After the last update of Manjaro the screen now just boots to a flashing cursor. I had Plasma KDE appearing prior to the update. Everything still runs as I can ssh into the PI but the screen ...
motionpotion's user avatar
0 votes
1 answer
77 views

I think I shorted my pi's gpio pins

I think I fried my raspberry pi 4B ( revision 1.5 I think ). I was powering it via the gpio pins ( pin 2 and 6 ). Unfortunately since I was using crocodile clips I think I have touched GND with pin 8. ...
Daniel Zaprev's user avatar

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