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Questions tagged [pi-4]

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

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3
votes
1answer
30 views

raspberry pi 4 using SPI 4 & 5 at the same time causes kernel oops and crashes the whole system

intro i want to use multiple SPI busses at the same time. but when i use to use SPI 4 and SPI 5 at the same time it crashes the whole system it doesn't crash instantly sometimes it takes 10 seconds ...
0
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0answers
26 views

Creating an OS for the raspberry pi in rust, booting from it

I was following this tutorial on how to make your own basic OS for an x86_64 system in rust, but wanted to do it for an ARM64 target, specifically, the raspberry pi 4. I am at the point where I have ...
0
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0answers
15 views

can not disable text to speech function on a pi 400 [duplicate]

I purchased a pair of Logitech S150 USB speakers for my pi 400. When I booted up the pi, I immediately started hearing a digital voice reading the web page I brought up. I removed the USB connection ...
2
votes
2answers
80 views

Raspberry pi cannot synchronize clock

I have bought three raspberry pi's with the intention of using them as temperature sensors throughout the building. I have bought the following models: 1 raspberry pi 4 model b 2gb 2 raspberry pi 4 ...
-3
votes
2answers
48 views

Can I take out my sd card?

I'm wanting to run different os (raspberry os, kail, etc...). What i'm wanting to know is it safe to remove the sd (turned off) and can I use other sd card in the same pi?
-1
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0answers
34 views

during install of Raspberry PI OS I shouldn't have pressed button to elimanate the border around the edge of the screen

During the installation of the Raspberry Pi OS on the Raspberry 4, I could see a small border around my video display so I pressed the button designed to eliminate that border. I shouldn't have done ...
0
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0answers
11 views

Can't connect RPI to internet via windows internet sharing ethernet cable

I've set up a headless RPI connected to my Windows PC via ethernet cable and enabled internet sharing on my WIFI card to the connected ethernet cable but I can't connect to the internet on the RPI. ...
0
votes
2answers
20 views

raspi-config for CentOS (or) How do I manually adjust the size of my root partition?

I need to know how to install raspi-config on a CentOS distro. Can this be done? If not, how can I manually adjust the root partition? On every image I've downloaded for the Pi, every CentOS distro, ...
0
votes
1answer
25 views

PWM input to raspberry pi 4B

I want to read PWM output signal which I got from a sensor. Is there any way to give PWM signals as input to Raspberry pi 4B?
-1
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2answers
56 views

Raspberry pi 4 gpio pins not working

My Raspberry pi 4 gpio pins are not working for some reason I tried uninstalling and reinstalling rpi.gpio and gpio and it did not work here is the code import RPI.GPIO as GPIO import time led = 26 ...
0
votes
1answer
26 views

pi4 Only 4B fails to reboot

I have a Raspberry Pi 3B and 4B. It operates 24 hours a day. Reboot once a day. Only 4B fails to restart about once a week. The screen goes black. The lamp on the Raspberry Pi 4B is normal, so it's ...
1
vote
1answer
65 views

RaspberryPi 4 as NAS with disks in USB hub [closed]

I would like to build a simple home NAS hosting 4 discs on RaspberryPi and I wanted to use Quad SATA HAT, however they are either completely out of stock worldwide, or discontinued :( Next viable ...
0
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0answers
14 views

(Raspberry Pi 4 hostapd wireless access point) Does any one have expenerience connect more than 10 clients?

So I setup an AP on my Pi 4 8gb. Any suggestions have to be supported by the Pi 4 built-in wifi hardware. I started connecting a bunch IoT devices, and everything was fine for a while. So I had 9 ...
0
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0answers
25 views

Recoding video files for easy (low CPU) playback on Pi4 / Firefox

I won't go into the full detail of how we arrived here but I have a need to play two (locally stored on the eMMC) video files simultaneously in Firefox running on a Pi CM4. Right now it's struggling ...
1
vote
1answer
38 views

unable to gps data serially in raspi 4

I am trying to get ublox zed f9p module work with raspi 4. I am using this module I am running on ubuntu 20.04 desktop version on raspi 4 and i have connected the module serially(/dev/ttyS0) to my ...
1
vote
0answers
19 views

Green frames when capturing webcam

We use RPI4 for automation. One of our use-cases is to capture image frames via webcam/HDMI grabber as fast as possible and do some analytics. We use python and opencv for capturing, but it's not ...
0
votes
1answer
58 views

RaspAP not working out of the box

I had a previous installation of RaspAP that worked on Raspbian 2019, but had a problem with camera not working and decided to start from scratch on a new image of Raspberry Pi OS 2020. I installed ...
-1
votes
0answers
16 views

Sending data using RS485

I have a solution which depend on RS485 to communicate with other device, I need some help for these questions: How can I enable Rts and Cts pins on Raspberry pi4 ? Also, How can implement C# code ...
0
votes
0answers
36 views

Audio input and Output Issue on Raspberry Pi 4

Running Debian buster on a Raspberry Pi 4 (Model B Rev 1.4) Installed ReSpeaker 4-Mic Array which is only for capture audio (no 3.5 mm jack attached to this model). Mics are not working If I connect a ...
0
votes
0answers
34 views

iw dev wlan0 station dump output signal missing

I used the following command iw dev wlan0 station dump to collect the information about the devices connected to the AP. I used to see signal level in the output in Raspberry Pi 3. When I tried to ...
0
votes
0answers
20 views

Raspberry pi4 does not synch to correct time after startup (ntp service running)

After startup my RPI synchs to the correct date, but the time remains about 90 minutes off (behind). sudo ntptime gives: sudo ntptime ntp_gettime() returns code 5 (ERROR) time e4e82bc8.c2d92000 Sun,...
0
votes
1answer
22 views

raspberry pi 4 is constantly rebooting after stalled upgrade

I had sudo apt update & sudo apt upgrade'ed my raspberry pi 4 with raspberry OS. The upgrade process stalled while unpacking. or at least I thought it did. nothing happened for minutes while ...
1
vote
1answer
50 views

Peripheral connections for the the ages [closed]

I have a peripheral that has a 6 pin JST female connector that mates to the peripheral. The other end came with a 6 pin female JST connector that is decidedly NOT compatible with the Pi GPIO header. ...
0
votes
0answers
14 views

USB SSD I/O-Error after doing longer writes/reads on USB Port

I'm trying to read from a USB SSD that is connected to my Pi 4 (4GB) over a powered USB hub which should deliver enough power. There are a lot of files on it so for example when doing ls it takes a ...
-3
votes
1answer
33 views

Run a RaspbianOS system for rpi4 on rpi3b?

I have an OpenHab 3.1 installation on a raspberry 4 running. I'm currently using raspiBackup to create a full backup of the system and also having an .img file to restore it when needed via Etcher ...
0
votes
0answers
15 views

Share USB tethered phone to Raspberry Pi 4 LAN port - Ping works, but no internet traffic

I followed the instructions of M. Rostami here: https://raspberrypi.stackexchange.com/a/106878/139008 My setup is Android (tether on) -> USB -> Raspberri Pi 4 (Buster) -> Ethernet -> ...
1
vote
0answers
36 views

Running bluetooth on Raspberry Pi 4

I hope this is the correct group for this question. If not I can redirect the post. I have developped a BSP for Raspberry Pi 4 2G using Buildroot. I enabled the rpi-bt-firmware, rpi-firmware and the ...
1
vote
2answers
47 views

Can't upload sketches to Arduino Uno with Raspberry Pi 4

Using my raspberry pi 4 with Arduino IDE to upload sketches to my Arduino Uno. Raspberry Pi 4 is encased in an Argon Neo (in case that's important). At first I tried to get the board info and received ...
0
votes
0answers
27 views

i need execute code when user input number in terminal in python3

I have this python3 code. import RPi.GPIO as GPIO import requests payload = {} headers = {} GPIO.setmode(GPIO.BCM) GPIO.setup(14, GPIO.OUT) string = input() def buclick(event): url = "http:/...
0
votes
2answers
23 views

SPI not getting enabled in Raspberry Pi 4 with custom-built Linux kernel

I have built Linux Kernel 5.10.36-v8 using Buildroot and using it into my Raspberry Pi 4B for the past few weeks. I recently wanted to enable SPI ports on the Raspberry Pi and followed the ...
-1
votes
0answers
36 views

raspberry pi 4B fails to start after reboot

I have a Raspberry Pi 3B and 4B. It operates 24 hours a day. Reboot once a day. However, only 4B may fail to boot. The screen turns black. No abnormality is found in the lamps of Raspberry Pi 4B. ...
1
vote
0answers
32 views

Unknown partition table type error from u-boot running on Raspberry Pi 4

I've been trying to run the Linux on my Raspberry Pi 4 board. But, I couldn't even achieve running the u-boot properly. The board launches up without any problem and starts running the u-boot. The u-...
0
votes
1answer
28 views

Streaming via DLNA is smooth, but same video via browser is unenjoyable

I manage and stream my videos with a self-hosted web application. The web application also offers DLNA based streaming. When I stream the videos via the browser (latest Raspberry PI OS and default ...
0
votes
0answers
39 views

How do I get back to GUI?

Recently my RPi started switching to a terminal on boot. I cannot get out of it and when i boot it says "Time Synchronization error" I've tried setting it manual, automatic and nothing has ...
0
votes
1answer
26 views

How to copy files onto a raspberry pi os using only the microSD it is on - no networking, bluetooth or usb?

I would like to copy a file to a raspberry pi using a Macbook. I have installed ubuntu on the 64GB microsd and booted it up no problem. I have turned off bluetooth and wifi/networking on the raspberry ...
0
votes
0answers
62 views

controlling stepper motor with potentiometer

I'm trying to control the speed of a stepper motor (28BYJ-48) with a potentiometer connected to a A/D converter. I'm encountering 2 issues: Whenever I try getting the value of the potentiometer in ...
0
votes
0answers
24 views

How to assign Eth0 IP from external DHCP server to Raspberry Pi4?

I am trying to assign IP address for Eth0 from my router which has DHCP. I have connected my Pi4 with the router. But the IP is not assigned. How can I solve this issue?
-2
votes
1answer
22 views

Which types of cables are needed to connect RaspberryPi with Hx711 and 4 load cells?

I want to create a weight scale using my RaspberryPi 4. I bought a Hx711 and 4 load cells. I looked at many tutorials on the internet but none of them mentioned which types of cables are used to ...
0
votes
0answers
46 views

Raspberry Pi4 USB3 SSD

I have tried different SATA-SSDs with USB to SATA connectors. Afar from the multiple questions in this forum my question is quite simple: Why do connectors with SSDs work flowlessly on one desktop and ...
-1
votes
2answers
56 views

Where can I find spec of hardware random number generator used on Raspberry Pi?

I remember stumbling upon the fact Raspberry Pi devices have built-in hardware random number generator. Would someone happen to know where I can find official hardware random number generator spec?
2
votes
3answers
51 views

How to build Ruby 2.7.x/3.0.x on Raspberry Pi4?

I'm trying to install Ruby version 2.7.x or 3.0.x using rvm on a Pi 4. The make process fails compiling the file coroutine/arm64/Context.S assembling coroutine/arm64/Context.S coroutine/arm64/Context....
6
votes
3answers
1k views

At what max temperature is a cooling fan recommended?

I have a RPi4 now, have cooling sinks mounted on the processors and it runs pretty smooth, but sometimes I worry about the temperature development of my processor. At what level should I worry, and ...
-1
votes
1answer
50 views

Launching browser (Chromium or Firefox) without x server / xorg

I need to launch Chromium (or alternatively Firefox) on a raspberry PI 4 8 GB running Raspberry OS 2021-05-07 without launching xorg / xserver. Is that feasible, for example by launching it in ...
1
vote
0answers
87 views

Getting pi-fancontrol to work when running Ubuntu

I've got a fan connected to GPIO 14, but am having trouble getting pi-fancontrol to work on my Ubuntu 21.04 install on an RPi4. The official docs say to run snap connect pi-fancontrol:gpio pi:bcm-...
0
votes
2answers
131 views

Connect USB hub to RPi 4 USB C port to power the Pi and access peripherals?

I want to connect an RPi 4 to a bunch of USB peripherals and a power source that are about 3m away from the Pi, using only one USB cable (because that seems a lot neater than multiple cables and ...
0
votes
0answers
49 views

Connecting a pi-4 4GB to stereo for 5.1 surround sound

First I'm a new Raspberry Pi user on my first project. I have a Sony ZA3100ES Receiver set up to provide 5.1 surround sound that works great with DVDs and Cable TV but I want to connect to Netflix ...
0
votes
1answer
25 views

I have raspberrypi 4 board, after putting sd card only the pwr led is glowing not act led. And also the red led is not bright as usual

I tried booting with different SD cards but the problem is same , os was not booting and the pwr led was glowing with low intensity. Can you give me any solution to overcome this issue Please!
0
votes
1answer
30 views

RPI4 receives IP, doesn't respond to ping (over Ethernet)

I've been using a RPI0W as a server for a while now, but an upgrade was getting necessary. So... I bought another RPi4 (Because the PI1 and PI2 that I still had laying around weren't much of an ...
0
votes
1answer
24 views

Receiving noise signal on input pin after connecting jumper wire to GPIO pin Raspberry pi 4

I am trying to use GPIO pin to get input from the sensonr, after connecting the sensor I noticed I have a lot of noise ( fluctuating signals between 0 and one). After further troubleshooting I noticed ...
0
votes
0answers
50 views

Error loading libgobject-2.0.so.0 and libglib-2.0.so.0 - Box64 on RPi 4

I'm trying to install a few amd64 apps, including Gitkraken and Zoom, using Box64 on my Raspberry Pi 4b+ running Raspi-OS arm64 (from here), but I'm getting the error below: Gitkraken, downloaded from ...

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