Questions tagged [pi-4]

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

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59 views

Information about floating point unit of Raspberry Pi 4 Model B Rev 1.1

I have this RPI board. Hardware : BCM2835 Revision : c03111 Serial : 100000009f7a953c Model : Raspberry Pi 4 Model B Rev 1.1 I want information about Floating point unit(FPU) it has like ...
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1answer
41 views

Pi 4B not booting when powered via power pins on extension header

I used to power my Pi 3B and 3B+ from and external shield board of my design, which features 5A power source, connecting +5V to pins 2 and 4, and GND to 6, 14, 30, 34 and 39. It worked just fine, ...
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0answers
23 views

Raspberry PI External Case Connector

I have a DIY project with a Raspberry Pie and a few sensors. I have them working, hardwired through a breadboard. As I'm mounting them to a case I would like to have a female connector that passes the ...
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0answers
39 views

Raspberry PI 4 autostart python program after boot using LXDE

I have a python script which is using tkinter GUI library. I have initially tried to run the script after boot using systemd method but I got error regarding the tkinter. I have looked it up online ...
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0answers
36 views

cheapest UPS for pi4 [closed]

I am looking for a better/cheaper way to do power-backup in case of blackouts. Right now it is a PI4 I need to power, and it is powered by a 12V AGM battery (12Ah) PI4 <-> USB-C cable <-> ...
1
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1answer
48 views

How to stop pulseaudio from deleting your .asoundrc file on startup?

I have a Raspberry Pi 4 and have been messing around with Pulseaudio and Alsa a lot lately. I wrote an asoundrc file which I want the system to run every time it's on. However, Pulseaudio keeps ...
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3answers
61 views

How to run a program on boot, but not user login?

I need to set an environment variable and run an app when the Raspberry Pi boots up. To that end, I added the following to /home/pi/.bashrc: export MY_ENV_VAR=foo cd /home/pi/MyApp ./MyApp When I ...
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2answers
17 views

How to access servos using pins other than GPIO 2&3

I have an adafruit pca9685 16-servo controller. I was using this guide to control it: https://learn.adafruit.com/adafruit-16-channel-servo-driver-with-raspberry-pi/using-the-adafruit-library ...
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0answers
81 views

Not able to select join by computer audio in zoom

I was using zoom web version on rpi 4 for last 6 months. But for last 1 month am not able to select join by computer audio button, its kind of grayed. There is no currently opened thread on this issue ...
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1answer
22 views

Servo control issue

I have written a small program that controls two servos: to start the recording process one servo opens a shutter (servo1), then the second one lifts a sky camera out of a housing (servo2). To stop ...
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2answers
65 views

How do I use my raspberry pi? [closed]

I just got a raspberry pi and I want to use it but I don't know how to use it. I tried to plug it into my windows CPU but it didn't work, so how do I use it. I want to code it with python by the way
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0answers
62 views

HDMI output of a Raspberry Pi on TV [closed]

Problem trying to display HDMI Output on a Television I work in computer science, and I learn to code. I bought a 4GB Raspberry Pi 4 with all the basic accessories. HDMI cable, SD card, protective ...
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0answers
41 views

PIP3: Install Offline & Update Older Library

Tried these commands to install an uncompressed package with pip3: pip3 install --no-index --find-links=/home/pi/Downloads/GitHub/cryptography cryptography sudo pip3 install -U --no-index --find-links=...
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0answers
27 views

How do I troubleshoot audio output issues with squeezelite?

I have a Raspberry Pi 4 running Dakboard OS (which is a slightly modified Raspbian for the purpose of displaying a calendar via Chromium). The Pi is connected to a monitor over a micro-Hdmi to VGA ...
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0answers
39 views

Temporary failure resolving 'ports.ubuntu.com' on Ubuntu 20.04

I have spent a lot of time looking for a solution to my problem. Everything I've tried hasn't worked so far. From what I understand, this is an internet connection problem or a DNS issue. I followed ...
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1answer
61 views

Are there good actively maintained linux based OS that have great touch support especially for Raspberry Pi 4?

I have been working with the official Raspberry Pi touch display and I must say that it is not as sensitive, responsive or fluid as I expected. After researching about it on R-Pi forums I realized ...
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0answers
23 views

Raspberry Pi Official 7” Monitors not working

I am having trouble getting 2 Raspberry Pi Official 7” TouchScreens to work. I have tried them each on 2 different Raspberry Pi 4s with multiple Ribbon Cables making sure they are in the correct ...
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1answer
33 views

Migrate from WSL2 to Raspberry 4 with Docker

I am planning to use a Raspberry Pi 4.0 B as the new home for my current distro of Ubuntu which is located in WSL2 in Win10. Now as I understand I can export the files, but is there any way to get it ...
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0answers
12 views

Programatically disconnect & reconnect a USB port or ethernet port [duplicate]

I have a device that is attached to the USB port on my RPi4 that sometimes has to be reset. The RPi4 is too far for us to physically disconnect/reconnect the USB cable so right now we are just ...
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0answers
24 views

Large Difference in the YOLOv5 mAP value(Accuracy Performance on Raspberry Pi and Server

For any better understanding of the question with proper links please refer to this link - https://docs.google.com/document/d/1ej8hIktTFmsqTH0GCYVw-qD8sF9C9fa_Pe61EenNmkU/edit?usp=sharing Hey! I am ...
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1answer
40 views

Wireless Key fob

sorry am a complete novice. I have a Raspberry Pi 4b which will not connect to/recognise a Universal Cloning Wireless Remote Control Key Fob for Car Garage Door Gate Fixed code 433mhz. Further ...
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2answers
34 views

Raspbian Chromium Startup

I am setting up a "kiosk" mode display but Im having a hard time getting chromium to show properly on raspbian login. If I comment the line out, and manually start chromium, it will show. ...
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0answers
42 views

This problem appreas after shutdown my raspberry pi, how canI solve it?

How can I solve this problem ?
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0answers
57 views

How to install ffserver on a Raspberry pi 4?

After searching many forums, and finding broken tutorials and outdated how-tos, I can't find the way to have ffserver installed alongside with ffmpeg. So, as everyone seems to claim that ffserver is ...
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2answers
77 views

Is there a way to lower the bluetooth signal strength, on a Pi 4?

I've set up the bluetooth and Works as intended, but the signal strength is much more than I need it to be. I need the range to be half of what it is right now. Update: Found a solution using the ...
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0answers
52 views

How do I rebuild the Minecraft shim layer?

I'm running a Minecraft server off a RPi4 8gb, but the raspian OSs is 32 bit, limiting the memory I can allocate to the server. There is a beta 64 bit os, but on of the things missing is Minecraft's ...
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0answers
41 views

Cast raspberry pi screen to Android?

I am looking for a way to use my (very) old tablet as a monitor for my raspberry pi 4 that's running Linux (I am willing to change to Raspbian if needed). The tablet runs on Android 4.4.2 (I have ...
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0answers
20 views

How do you make remote desktop connection fullscreen?

I am using a raspberry pi 4 with xrdp and remmina remote desktop client to connect to a windows 7 device. The connection works fine but when I connect the windows device the screen is really small and ...
1
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1answer
38 views

Setting X to use 800x480

For some reason, despite settings in /boot/config.txt when I start X windows it goes with a resolution of 1024x768. I have a 5 inch screen with that uses 800x480. How can I reconfigure X to use a ...
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0answers
50 views

How do I fix a Raspberry Pi 4 that isn't displaying anything?

The problem first started when I tried to change the orientation of display for retro pi. Before, the orientation was vertical. So I tried to change the resolution options in "Raspi-config" ...
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0answers
19 views

Raspberry Pi 4 shows black screen

I've tried booting with RPi os lite, and Ubuntu 20.04 64 bit. It shows the boot screen, but when it boots it shows a black screen. I tried burning the SD Card Boot bootloader, and that shows a green ...
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0answers
16 views

RaspBerry Pi pwmchip0 doesn't always work

I'm in a project currently using the RPi's pwmchip0 to implement Hardware PWM. I added the dtoverlay = pwm-2chan in the cofig.txt. Now when I follow that explanation https://jumpnowtek.com/rpi/Using-...
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0answers
21 views

SPI transfer random delays

I am using two SPI devices to talk to a MCP23S17 (SPI0) to multiplex the chip selects (CS) for four SPI slaves (SPI1). The loop is running at 500 Hz, the transfer takes roughly 900 us. Most of the ...
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0answers
11 views

ssh to net booted raspberry pi 4

I have tried to net boot raspberry pi from another raspberry pi, But not getting clue, how can I ssh to newly booted raspB. I tried to add ssh file (empty file) in the boot partition (inside /tftpboot ...
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0answers
27 views

raspberry pi 4 keeps re-showing the log in page (kali-linux for raspberry pi)

So basically when I try to log in, and when I put the username and password, it just go black and then re-shows me the log in page. And if my username or password is incorrect, it says incorrect ... ...
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0answers
40 views

Pi4 'Apt-get update' not working per 'Too many symbolic links'

After migrating much of my previous install to a now SSD, I'm no longer able to run 'sudo apt-get update' though 'upgrade' and everything else works fine. I get this whey trying:` Get:1 http://archive....
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0answers
49 views

Is my pi4 dead and How to determine what exactly happened?

Apparently, I somehow bricked my new pi4. When I plug it in, the red (power) LED is working, but the green one (boot) is not. To be exact: when everything, including the SD card is taken out the pi, ...
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1answer
48 views

Neopixel with raspberry pi

I am using a neopixel for my raspberry pi project. I am trying to control 30 pixels and the strip is 20cm long. Can I use it just by using the pi's 5v pin? Also if I it is possible, how long should ...
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0answers
26 views

Input/output error when transfering large files to external SSD

I have a Raspberry Pi 4 with the last Raspbian (with Linux 5.10.17-v7l+). It has the official power supply, and an external SSD (Western Digital 550 GB on a USB 3.0). It can run fine for long periods ...
0
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1answer
55 views

wiringPi compile issue on RPi 4B 64bit

I am trying to compile my C++ project using CMake. My Raspberry Pi OS does include /usr/include/wiringPi.h and all the required .so files in /usr/lib/. Here is the output of gpio -v command: gpio ...
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0answers
77 views

PI 4 Touchscreen unresponsive after first boot

this is my first post here. I recently got a Raspberry pi 4 B 2018, 64bits & 8GB ram. With this I have a touchscreen that I plugged in the "DISPLAY" ribbon cable socket. So far so good. ...
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0answers
18 views

How to start program on specific monitor?

There are 2 displays attached to Raspberry Pi 4 over HDMI. pi@raspberrypi:~ $ DISPLAY=:0 xrandr -q | grep ^HDMI HDMI-1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 256mm x ...
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2answers
55 views

How can I use my Raspberry Pi 4 for a write intensive application?

Context I have just found out the hard way that SD cards have a real life attainable write limit. I use my Rasbperry Pi 4 (amongst other things) to scrape a website 24/7 with a frequency of 1 minute, ...
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0answers
13 views

Kali linux giving strange video output disruptions on pi 4

When I boot my raspberry pi 4 the screen acts strangely. The right and left borders are glitching and barely visible. Also every other line in the bootup is glitching. Hard to explain so I'll add a ...
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0answers
92 views

Error while writing bootloader to SD card

I have some problems with my RPi 4B, and one of the suggested tests is to overwrite a bootloader. I'm trying to do this on my xUbuntu 20.04 with rpi-imager, but I get the following error: Tried two ...
1
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1answer
113 views

RetroPie on Pi 4B won't display on LG smart tv

I have a Raspberry Pi 4B and have installed RetroPie on it (by flashing the image provided on the RetroPie site). In the beginning, connecting to my LG smart tv (43UM7600PLB) worked fine. After a ...
0
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1answer
45 views

Pi 4 not reading the QMC5883L magnetometer

I am trying to set up my magnetometer QMC5883L with my raspberry pi 4. But the pi is somehow not reading the magnetometer. I ran the command i2cdetect -y 1, but there is no detection. My connections ...
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0answers
31 views

Can't get 1080p30 / 720p60 from pi camera with OpenCV

I'm new to raspberry and raspberry pi camera. I'm using OpenCV and pi for a project; Using OpenCV and python, I want to get a high resolution video feed to process. On the official web page, it says ...
1
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0answers
41 views

Same display between 2 monitors on Raspberry pi 4

I want to know if its possible and what is the easiest way to setup both my monitors on a single Raspberry PI 4 to display the same view instead of a standard dual monitor setup where you can do some ...
2
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1answer
38 views

Raspistill takes long time to run

I am trying to get my camera run on my raspberry pi 4. I can get an image, but the raspistill command takes about 6 seconds on average to acquire one image. Is it normal? $ time raspistill -o bar.jpg ...

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