Questions tagged [pi-4]

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

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4 views

How to shut down the RPI4 for a certain time or prevent it to turn on power on booting

For my project, I access the RPI remotely. The RPI continuously powers sensors over its 3.3vdc rail. For testing & troubleshooting, I would like to cut current to those sensors for some time. ...
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0answers
7 views

Send USSD command to mobile phone connected via bluez to raspberrypi 4

I just start working with ofono and when I want to send USSD command. when I use initiate-ussd <modem> I get this error: Traceback (most recent call last): File "/home/pi/workspace/libs/...
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1answer
114 views

Securing VNC connection

I have an old laptop (linux mint xfce) I use for a VNC viewer connected to the Pi 4. This gives a significant performance improvement and access to the latest 64bit s/w. Is there a way to make this ...
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0answers
20 views

RPI4 bootloader works, but won't load OS

I have a RPI4 that I was running as a desktop for my kids. It was booting from a USB3 HDD, but stopped at some point. I loaded raspberrian onto an SD card to see if there was a problem with the ...
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0answers
19 views

HDMI port back-feeds my Raspberry 4 and keeps it from totally powering down

I don't want to power anything from the HDMI port. My power supply has a neat switch built into the 5v cord, and after shutting down the Pi, I just want to cycle the switch to bring the Pi back alive. ...
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1answer
10 views

force_eeprom_read=0, but RPi4 still stuck at rainbow screen

I have made a custom PCB/Hat for a Raspberry Pi and I need to use ID_SD and ID_SC as general GPIOs. At the moment Raspberry Pi 4 gets stuck at Rainbow screen when booting (with Raspberry Pi 3B+ ...
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0answers
17 views

Can a Raspberry Pi 4 be configured as an ad-hoc device or as a wifi access point?

Installed hostapd and dhcpd on raspberry pi os (bullseye) I configured hostapd and expected to see a wifi channel with the name I configured, I can't see anything. I read somewhere that the onboard ...
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1answer
47 views

I too have knocked off a component from the underside of my Pi 4 board. HELP

I too have knocked off a component from the underside of my Pi 4 board, a result of a poorly designed case. I could use help to identify the component. As I am dyslexic reading a schematic sends me ...
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0answers
54 views

RPi 4B does not boot properly with RPi OS

Raspberry Pi 4B does not boot properly with official Raspberry Pi OS. It was working 3-4 months ago. I have not used it since then. But today the issue occurs. If I attach power and monitor with RPi ...
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2answers
32 views

Printing a image in the mini thermal receipt printer adafruit using raspberry pi

I have opened the command prompt on a Raspberry Pi and typed the command as: lp -d ZJ-58 -o fit-to-page /home/pi/Documents/image_name.bmp which produces the gibberish printing as follows: Could ...
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4answers
49 views

Replace a red Led activation on RPI 4

I have a PI 4 and accidentally broke the red led. I don know how to identify it in order to get a replace piece and soldering Any idea or help, please?
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1answer
20 views

Pi 4, Hifiberry, and touchscreen power

I recently finished my basement and am in the process of getting it all configured, and one thing I wanted was to build a Raspberry Pi streaming device. I got a 3D printer for Christmas and found this ...
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1answer
25 views

Calculating power adapter needs for my Compute Module 4 setup

So I'm finding it a little difficult to figure out how I should be powering my setup. I'll have Waveshares IO board here: https://www.amazon.com/gp/product/B08VJBGD1Q/ref=...
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0answers
19 views

How to connect to a hotspot with dynamic ip on boot and get a static ip in rp4 with kali linux [closed]

I want to connect to hotspot on my phone automatically when i boot my raspberry pi 4 ( with kali linux installed ). I know that i can edit /etc/network/interfaces but the configuration file i have is ...
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0answers
23 views

i2c not detecting on Raspberry Pi 4 Model B Rev 1.5

Just purchased a new board - Raspberry Pi 4 Model B Rev 1.5 - rev b03115. Trying to use i2c to interface with Adafruit PiOLED - 128x32 Monochrome OLED Add-on for Raspberry Pi Adafruit SCD-40 - True ...
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0answers
17 views

Fresh Kismet Installation on RP4

Having to reconfigure my RP4 for kismet, with gps and Wifi. I tried compiling version2020 of kismet and that failed twice. My notes said v2016, which is what I then tried with another failure. So, ...
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0answers
23 views

Errno 121 Remote I/O error happening too often on Raspberry Pi 4 [closed]

I'm using a Raspberry Pi 4 - Rev1.4 together with a tc9548 multiplexer and 2 additional I2C sensors behind each multiplexer channel. OS version: AME="Raspbian GNU/Linux" VERSION_ID="11&...
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1answer
21 views

Raspberry Pi: Unable to reboot (unable to mount root fs on unknown-block(179,2) - on brand new sdcard/image

I got some new Sandisk 32gb Ultra sdcards installed Pi OS on them etc - but when booting the Pi they gave the error in the title - all the same.
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0answers
37 views

Raspberry Pi 4 - I2C scan extremely slow and not working

I am using a Raspberry Pi4 - 4GB (exact model: Raspberry Pi 4 Model B Rev 1.4) with following configuration: AME="Raspbian GNU/Linux" VERSION_ID="11" VERSION="11 (bullseye)&...
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1answer
15 views

Pi4B display turns off after boot using 128GB microSD [closed]

I have my 4B connected to a 7in display via ribbon cable and GPIO pins for 5v. If I format a 32GB or 64GB microSD card the Pi boots and displays normally; however, using a 128GB microSD card the ...
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0answers
19 views

unable to use serial on CM4 using linux

When i am trying to connect to my CM4 via serial on my linux desktop and i am unable to get any output from screen i have ensured that enable_uart=1 is in my config.txt file for clarafaction i am ...
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0answers
10 views

Ir Touch Frame question

I have a Raspberry Pi4 running the newest Raspberry Pi OS. I rotated the screen from the OS menu to portrait. However my IR Touch frame is off. I touch the lower left it shows in the lower right, ...
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1answer
33 views

VeraCrypt on RPi 4 Buster unable to find libraries

I installed VeraCrypt GUI on my RPi 4 running Raspian 10 Buster using the package veracrypt-1.25.4-Debian-10-armhf.deb on the VeraCrypt website. After checking the signature and successfully ...
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0answers
21 views

Which is the best dotnet core librery for controlling servo on Raspberry pi 4

Hello all I am doing research on the best library for controling servo motor on Rapberi pi 4 using C#. I tried some old ones. I will be grateful if you direct me to the best one for the purpose.
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1answer
34 views

Running AMD64 packages on ARMhf, which solutions?

I am new to Pi and my project is to be able to store some cryptos using software wallets (such as Coinomi or Atomic wallet) in order to avoid exchanges. I tried with Atomic Wallet and the result when ...
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0answers
12 views

Trouble getting PHPMyadmin running after installation Pi4

I have read the 'similar' questions .. searched the web for an answer. I install the LAMP stack and phpmyadmin. it all went well until i tried to run PHPMyAdmin. I created a index.php file with ...
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0answers
35 views

How to flash Raspberrypi over the Network

I have a need in which I need to flash my Raspberry Pi sdCard connected to Rpi4 without removing it from Rpi4 over the network. I'm using Raspberry Pi Desktop Image, after making some change to ...
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2answers
51 views
+50

Thermal mini printer receipt adafruit printing gibberish

I have written a very simple program in python to print the text value in the mini thermal receipt printer adafruit. Code: # On a CircuitPython microcontroller: import board import busio import serial ...
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0answers
40 views

Raspberry pi ethernet light blinking a color when connected to laptop

I have received a Raspberry Pi 4 Model B, and have been using it for several weeks. I had installed OpenWRT(21.02.1) on one of my MicroSD cards and had put it into my pi. I don't have an external ...
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0answers
50 views

Raspberry pi 4 Not Booting Solid Red One Green Flash

Hello I have a raspberry pi 4 and after it was lying for some time in a drawer I decided to use it for something and it doesn't work. I'm sure it used to work before and even though it was just lying ...
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1answer
60 views

How to make a raspberry pi a remote desktop controlled with normal pc running ubuntu?

I have a raspberry pi 4b and a normal full-size pc by dell. The big pc has ubuntu on it, and the pi has raspbery pi os bullseye. I want to make the raspberry pi be a remote desktop that can be ...
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2answers
68 views

OBS doesn't work

I am a user of obs, Open Broadcaster Software. I am using raspbian bullseye 32 bits OS. I have installed OBS with this command: sudo apt-get install obs-studio && sudo apt-get install obs-...
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0answers
31 views

RPi 4 Minecraft game-server lags after upgrading to Spigot 1.18.1

I have been using a RPi 4 Rev 1.4 (4GB RAM) as a Minecraft game-server for a relatively long time now. It had Java 11 installed (Amzn-Coretto 11) and ran Spigot-1.16.4 with about 50 plugins installed. ...
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1answer
47 views

how to edit /boot/config.txt from the .img.xz file?

i have installed ubuntu-21.10-preinstalled-desktop-arm64+raspi.img.xz. is it possible to edit /boot/config.txt from the file itself so that we need not boot into the pi and then edit the config.txt ...
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0answers
26 views

USB-boot won't load RPI arcade image

I downloaded Pleasure Paradise 512gb arcade image from arcade punks and used balenaetcher to burn the image to my 512gb SSD drive. When I connect the drive and boot my RPI4 it gives me this error ...
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0answers
24 views

Trying to connect my RaspberryPi4 to a Bluetooth modem and have it trusted and paired, but get error can't connect RFCOMM socket

I have a RaspberryPi 4 and am trying to connect it to a Bluetooth modem. I have paired and trusted the modem, but when I try to connect to the modem I get the message that the connection failed (from ...
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0answers
24 views

Connection time-out when SSHing, but only on a certain network

I'm a student who recently got a RPi Model 4B to learn more about computers and programming, and I had a connection time-out issue with SSH that only seemed to happen on my network. With some help ...
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0answers
24 views

Can't change ownership of '/dev/gpiomem' in a docker container in RPi

I'm trying to run a simple docker container with a python base image to control the LEDs on my RPi4. The Dockerfile compiles fine and I'm running it as follows: docker run --rm -ti --privileged --...
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0answers
19 views

Help to identify a chip on the RPi 4 modeel B

I am trying to identify a chip on the RPi 4 model B that is connected to the SD card. The chip is located next to the SD card reader and one of the pins is connected to the SD Card positive voltage ...
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0answers
39 views

Ubuntu 21.10 upgrade/images fails to boot on Raspberry Pi 4 8GB

I have three different Raspberry PI 4 with 8GB. The oldest of them fails to boot the Ubuntu image. After displaying the text for the GROWROOT on either a 32GB or 64 GB created microSD card, the ...
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0answers
19 views

H264 video input with streaming and recording

I want to connect a camera which outputs raw H264 via USB to an RPi4, I want to stream the video to a remote PC (Win10). I was advised that using H264 input would reduce the conversion overhead on the ...
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0answers
39 views

install display on raspbarrypi 4 didnt work

i had the lite version installed of Raspberry os on my pi 4 - and now I followed this tutorial https://raspberrytips.com/upgrade-raspbian-lite-to-desktop/ to installing a display enviorment - "...
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0answers
8 views

How do I run synchronet on Ubuntu 20.04 64-bit?

Can someone provide complete steps for running synchronet on Ubuntu Server 20.04 64-bit? I managed to successfully compile with SpiderMonkey 1.8.5, but then I run into a segfault when a GET request ...
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0answers
24 views

Unable to login in Zoom with Google Sign In when running on Box86 emulation

I followed the instructions on this article (https://pimylifeup.com/raspberry-pi-zoom/) to run Zoom App using Box86 emulation. Everything worked as expected except I could not log in using Google as ...
0
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1answer
31 views

Booting Debian 10 Buster from Raspberry Pi 4B USB3.1 device

I have followed this YT video guide to be able to boot from a USB device on a Raspberry Pi 4B. It worked perfectly from my USB flash drive (#1) running Raspberry Pi OS. However, when I swapped out the ...
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2answers
44 views

How to make headless Raspberry Pi automatically perform a command over ssh?

I have a headless Raspberry Pi accessed from my Mac over WiFi. However, whenever I lose the connection, it stops doing whatever I'm having it do; is there a way to make the Pi do a command on its own, ...
0
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1answer
71 views

Raspberry Pi 4B cannot run Linux XMRig

I'm running a headless Raspberry Pi 4b connected to Ethernet and controlled via SSH from my MacBook Pro. I used scp to move XMRig for Linux over to it, preset to mine. However, when attempting to run ...
0
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1answer
42 views

Pi4 won't boot - 3 long / 3 short green flashes

My Pi4B wouldn't boot up the other day and have been trying many different things with no luck. I have everything unplugged from it except the official power supply. With or without the SD card ...
0
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0answers
28 views

Slower boot time

I have a raspberry pi 4b 8gb variant, using official raspberry pi 4 psu , with sandisk ultra 32 gb micro sd card. The problem is the boot time it take 6-7 minutes to boot. And while running it ...
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1answer
28 views

Raspberry Pi 4B power consumption headless with constant usage

I'm setting up my Raspberry Pi 4b 2GB RAM in headless mode with a 64-bit Raspberry Pi OS Lite. It won't have anything plugged into it, but for an ethernet cable. It'll be performing FAH tasks (...

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