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Questions tagged [raspberry-pi4]

PROGRAMMING QUESTIONS ONLY. Questions about general use should be asked on https://raspberrypi.stackexchange.com/

The Raspberry Pi 4B comes in three different models, the only difference being the amount of SDRAM (1GB, 2GB or 4GB).
The most notable spec improvements, compared to older models are:

  • 1.5GHz 64-bit quad-core Cortex-A72 ARM v8 CPU
  • 1GB, 2GB or 4GB LPDDR4-3200 SDRAM (depending on model)
  • Gigabit Ethernet
  • 2.4 / 5GHz 802.11ac Wireless LAN
  • Bluetooth 5.0 BLE
  • 2x USB 2.0, 2x USB 3.0
  • 2x micro HDMI ports (both support up to 4kp60)

Visit Raspberrypi-Stackexchange for general questions about the Raspberry Pi.
Also useful might be the original raspberry-pi tag info.

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Raspberry Pi SSH Access Denied

I am trying to log into my Raspberry Pi using PuTTY from Windows. However, whenever I try to log into my Raspberry Pi using the default username and password (pi* and raspberry) it says Access Denied. I have the wpa_supplicant.conf file and ssh file…
Alan Shiah
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How to turn USB port power on and off in Raspberry PI 4

On a Raspberry PI 3B+, it's simple to turn power on its four USB ports off and on. Simply write a "0" to /sys/devices/platform/soc/3f980000.usb/buspower to turn power off and a "1" to turn power on. The same method doesn't work on Raspberry PI 4B,…
Jørgen Frøjk Kjærsgaard
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Emulating Raspberry Pi 4 with QEMU?

I want to emulate Raspberry Pi 4 using QEMU, but I am not able to find any image for RPi4. I need a kernel with which QEMU can emulate a Cortex-A72.
Anwar Ghammam
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Ubuntu Focal headless setup on Raspberry pi 4 - cloud init wifi initialisation before first reboot

i'm having trouble in setting up a full headless install for Ubuntu Server Focal (ARM) on a Raspberry pi 4 using cloud init config. The whole purpose of doing this is to simplify the SD card swap in case of failure. I'm trying to use cloud-init…
DragosN
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Fail to run cargo after install rust on raspberry pi 4

I was trying to install rust on Raspberrypi 4 using the recommended install script: pi@raspberrypi:/tmp $ curl https://sh.rustup.rs -sSf | sh But after reboot, cargo cannot be found: pi@raspberrypi:~ $ cargo error: command failed: 'cargo' error:…
user13796674
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2 answers

Microk8s, MetalLB, ingress-nginx - How to route external traffic?

Kubernetes/Ubuntu newbie here! I'm setting up a k8s cluster using a single Raspberry Pi (hoping to have more in the future). I'm using microk8s v1.18.8 and Ubuntu Server 20.04.1 LTS (GNU/Linux 5.4.0-1018-raspi aarch64). I'm trying to access one of…
Pablo
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Installing Flutter on Raspberry Pi 4 (8 G.B.)

I'm using the following article to install Flutter in Raspberry Pi 4 https://snapcraft.io/install/flutter/raspbian#install I'm getting the following error pi@raspberrypi:~ $ sudo snap install flutter --classic error: snap "flutter" is not available…
Dark Sorrow
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how to install and use mediapipe on Raspberry Pi 4?

I followed the official mediapipe page but without any result so can someone help to install mediapipe in raspberry pi 4 in windows it is easy to install it and use it but in arm device like raspberry pi i did not find any resources.
abdelhak51
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How to change the default matchbox-keyboard layout

I followed some guides to install an onscreen keyboard (matchbox-keyboard) and create a toggle button but for some reason the default layout that was installed for me is missing everything but basic shift, enter, backspace, space, and letters. The…
BunniFaccie
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mongoDB versions 5.x on arm64 architecture - minimum ARMv8.2-A required

It looks like starting with version 5.0.0, mongoDB requires at minimum ARMv8.2-A or later microarchitecture to run. That unfortunately disqualifies single board computers like: Raspberry Pi 4 (BCM2711 / ARM Cortex-A72 / ARMv8.0-A) Odroid C2…
Phantomski
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Install Java 16 on Raspberry Pi 4

I have tried multiple releases from here using : sudo -i cd /usr/lib/jvm wget [release link here] tar xzf [file name here] export PATH=$PWD/[dir here]/bin:$PATH java -version But after java -version I always get: /usr/lib/jvm/[dir here]/bin/java:…
resuther
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VNC on Raspberry Pi shows Cannot Currently Show the Desktop

I am trying to use VNC in a headless install on my Raspberry Pi 4, running Raspberry Pi OS, installed via Raspberry Imager. The install is more or less vanilla, as the only changes I have made are for connecting (seting up SSH, wireless and VNC as…
Martin Vinter
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Issues running Selenium with Chromedriver on Raspberry Pi 4

I wonder if anyone can help me with this error that I'm getting. I want to use Selenium to monitor a web page on a (headless) Raspberry Pi 4 using Python. I have installed Selenium and installed the correct versions of Chromedriver that needs to…
bazmattaz
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Install QtVirtualkeyboard in raspberry-pi?

I am try to implement Qt-Virtualkeyboard in Raspberry- pi, using PyQt5 - Show virtual keyboard but I did'nt find the prefix path for it, bin, plugin etc folder, actually whole Qt folder doesn't exist.
Peon
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5
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Raspberry Pi Buster Update Broke Audio Input

Running a Raspberry Pi 4 8-gig, Buster, Python 3.7.3 I have been running Speech Recognition for about a year just fine (first on RPi 3B+, then 4 - 4gig, now on 4 - 8gig). Recent update seems to have disabled my microphone input through my USB Sound…
David Xanatos
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