Questions tagged [pi-4]

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

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1answer
22 views

Can not overclock RPi 4

I'm following this guide: https://www.cnx-software.com/2019/07/26/how-to-overclock-raspberry-pi-4/ And when I run the command vcgencmd get_config int | grep "arm\|over" it tells me that arm_freq=1400....
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0answers
11 views

No audio with Fake KMS rpi4

I can hear audio on HDMI output with the Legacy video output. If I enable the G2 GL (Fake KMS) it stops working. I tried removing pulseaudio, install it again with no luck. I also tried to force ...
1
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1answer
9 views

Using Serial and Bluetooth device (external device) same time especially for using external BT dongle

I want to use Serial and BT same time on RPi 4B (Python) I thought I cannot use it so I attached usb blutooth dongle (CSR4.0?) on it. But I only can find references on the net using default BT when I ...
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0answers
19 views

start RPI on read only with Raspbian

I want to start my RPI in read only mode to get a perfect 24/7use setup.But I need to have a graphical user interface running. For that I tried this guideline to put the SD card in read only mode. But ...
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0answers
17 views

Alpine pi 4 hwclock/swclock

I am trying to use a Pi 4 with I2C DS3231 hardware clock, on alpine 3.11.5 aarch64. I have activated the i2c bus, and followed the wiki to add the start_pre code. But at boot time, I have an error. ...
1
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1answer
14 views

Connect IP Camera to Raspberry Pi 4 through direct ethernet connect

So we have 3 things: Raspberry Pi 4 IP Camera Ethernet cable We just want to connect the IP Camera to the Raspberry Pi 4 using the ethernet cable directly. Not through any router, switch, network or ...
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3answers
58 views

How to send sensor and analog data wirelessly to Pi without internet

I'm fairly new to all things RPi so im still trying to get my bearings. I want to control a robot from a distance, about a Mile approx. I have build the robot and i have no problem controlling it ...
1
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0answers
26 views

Full HD playback on RPi4 with hardware acceleration

I am the owner of Raspberry Pi 4B with 2GB RAM and latest Raspbian OS. I already did some basic testing with HTML5 FullHD video or with Youtube and 1080p video, but playback is jerky and definitely ...
1
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0answers
24 views

When I power my Raspberry Pi 4, it shows only following window and remains still. What should I do now? Plz help

![When I power my Raspberry Pi 4, it shows only following window and remains still. What should I do now? Plz help It took me hours to solve this problem but same situation till now. How to fix this? ]...
2
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1answer
44 views

Cannot install kali-linux-full in raspberry PI 4

I have downloaded the image from the offensive security website and I got kali running but I can't seem to find a way to install the full kali package(kali-linux-full). The packages that come bundled ...
1
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0answers
11 views

Monitor not recognized by other devices after having connected my raspberry pi 4

I have a weird problem and I simply can't find any solution to it: I use a Fujitsu Siemens monitor with a dvi to hdmi cable which works just fine with all my devices. However, after I connected my ...
1
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1answer
39 views

wpa_supplicant.conf not working with my laptop wifi with pi-zero

I have 2 raspberry, one 4 and one Zero W. The second one is headless and I use it via ssh from my laptop using my home wifi network. My goal is to emit the wifi via hotspot on my laptop (ubuntu 18.04)...
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0answers
21 views

How do I disown a youtube-dl process and have it finish multiple downloads?

I am using youtube-dl to download an entire playlist of videos. I would like to do this overnight as the videos are quite long. The first video continues to download after being disowned, but the ...
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0answers
28 views

Problem related to desktop version of Kali Linux on Raspberry Pi 4

is it possible to run kali linux full version on a raspberry pi4 without crashes and stuff. i have run the ARM version and got stuff done but i want all the tools in the full version on my raspberry ...
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0answers
22 views

DS18B20 / onewire stopped working after dist-upgrade

I recently did apt-get update + apt-get dist-upgrade and after reboot my DS18B20 stopped working. ls /sys/bus/w1/devices/ results in: w1_bus_master1 But previously I had dirs for my two sensors ...
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0answers
16 views

2 MPU6050 on Raspberry pi4, different values

I have two identical MPU-6050 connected to a raspberry pi 4, but it looks like one is off in the readings. I don't have another sensor, so can't test that, but I was wondering if it is the sensor or ...
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0answers
56 views

aarch64 or armv8 with Arch on a Raspberry Pi 4?

I installed arch on my raspberry pi 4 based on the instructions from the arch linux arm site, expecting to get an aarch64 install, or some variant of armv8. Instead what I got was an install of armv7 ...
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0answers
20 views

Pi-4b USB 3 no longer recognising Powered USB HDD Dock

TL:DR: Previously working setup now fails with no apparent hardware damage, nor deliberate software changes. My original setup had been working without problem since Sep 2019. I powered it down, ...
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0answers
33 views

USB not working on Raspberry Pi4 using Raspbian, first boot

I've just bought a new RPi4 2GB and I'm having issues connecting a keyboard to it through USB. I've used this keyboard with previous models of the Pi and it's worked fine and checked it and it's ...
1
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2answers
24 views

simple way to open webbrowser in fullscreen from python script

I want to open my chromium web browser in fullscreen-mode and open an URL that I get from a different config file. All this should happen automatically after booting. For testing, I tried to execute ...
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0answers
35 views

installing qt on raspberry pi 4

I'm installing Qt to my raspberry pi-4 for image processing project. I use the commands: sudo apt update uname -a apt-cache search qt5 apt-cache show qt5-default apt-cache search qtcreator apt-cache ...
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2answers
45 views

No internet via ethernet - local network working

I've moved house and internet provider + router, so this may be the source of the problem. My pi was working fine prior to this. My pi (running raspian) has a static IP (on eth0), and I can ssh fine ...
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0answers
16 views

Can I use A2DP profile as audio input in a phone call for higher quality audio? I am aware this would remove the option for using microphone

I've been able to connect my raspberry pi 4 to my phone as a bluetooth HSP/HFP profile. I used PulseAudio and ofono for that, following this tutorial: https://scribles.net/enabling-hands-free-profile-...
1
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1answer
30 views

Powering multiple Raspberry Pi 4s with 65W USB-C computer charger

Is it possible to power up multiple raspberry pi's with 65W USB-C computer charger? If so, is there anyone who have done it, that they can share how they did it?
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0answers
38 views

install qt5 on pi4 [closed]

I use https://www.youtube.com/watch?v=C_uOybXbDYI to install qt in run of 'sudo apt-get install qt5-default' down errors it happen: Err:1 http://raspbian.raspberrypi.org/raspbian buster/main armhf ...
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1answer
40 views

Raspberry Pi 4B crashing before properly booting

I'm sorry if this question has already been asked but I've been looking for a while and I can't find anything that's really helped. I recently got a Raspberry Pi 4b but when I connect it to a screen,...
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1answer
25 views

it possible to use 3.5 GPIO LCD and keep hdmi out on PI4B?

started playing with Pi lately ( late i know) and wondered can i add a cheap 3.5" LCD that is using the GPIO on the Pi4B while still using the HDMI out
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1answer
28 views

RPI4b cannot detect RPI3b via wifi even when both have the same SSID and passcode

I have a pretty complicated system going on and I need some help figuring out what I am doing wrong. I am not a computer engineer or have had much experience with RPI. I am running two RPI's with a ...
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3answers
84 views

WiFi not working after installing openmediavault (OMV) 5 in RPi 4

I installed OMV 5 in my Raspberry Pi 4B running Raspbian GNU/Linux 10 (buster), following this video https://www.youtube.com/watch?v=sYDyvr9Uc6Y (script installation). Just right after install OMV 5 ...
0
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1answer
31 views

Is it possible to do a new Buster/OpenHAB 2.5 install on 4 GB Pi 4b with SSD?

I'm building a new Pi 4b system using the downloaded image of OpenHAB 2.5.3 for a Raspberry Pi on a 64 GB MicroSD card. I'm also going to be using a ridiculously large 500 GB SSD. What I would like to ...
2
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0answers
30 views

Error in printing message to LCD via Raspberry Pi

from RPLCD import CharLCD lcd = CharLCD(cols=16, rows=2, pin_rs=37, pin_e=35, pins_data=[33, 31, 29, 23]) lcd.write_string('Hello world!') I've wired my raspberry pi and LCD exactly as the picture ...
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0answers
22 views

How to control an Arduino, LCD, and MPU 6050 with Raspberry Pi

Im working on a homework assignment where our professor has asked us to do the following, MPU6050 + LCD: Write a Python program to read the accelerometer and gyroscope readings from the MPU6050 and ...
2
votes
1answer
203 views

Attaching Sense HAT causes pi to freeze

I have a new Raspberry Pi 4 and Sense HAT. I've installed Raspian Buster installed via SD-card and managed to boot headless with ethernet cable connected. Power is from a USB-C cable plugged into a ...
3
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0answers
61 views

Video tearing in custom Electron app but not with included Chromium app

I have firstly played with the Raspbian config for video to see if that's the cause but after trying the web app within a different browser (Chromium included) it works. I have a web version of my ...
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0answers
24 views

4 HDMI display via USB

I want to use 4 HDMI small display modules on raspberry pi 4, but if i supply enough power to power on 4 display to raspberry pi, will display modules work well? Those 4 display modules will act as ...
0
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1answer
44 views

Can I power a RPi 4 model B via a 5V/2A fast charging adapter?

It says 5V/3A in technical specs, I wonder if that 3 A is a must, or is there anybody who can power RPi 4 model B via a standard 5V / 2A smart phone adapter. Specifically, I would love to hear ...
1
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1answer
26 views

Running Vivaldi with autostart and start Spotify [closed]

my aim is to use my Raspberry Pi 4 as a music box with Spotify. I have installed Vivaldi Browser and it already starts automatically when I start my Raspberry, but still, Spotify is not the standard ...
0
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1answer
31 views

Open (lx)terminal on startup, run program in it

I have the following service: [Unit] Description=Create test directory After=graphical.target [Service] Type=oneshot RemainAfterExit=yes User=pi ExecStart=/home/pi/Desktop/startup-script.sh [...
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0answers
38 views

Bluetooth headphones keep disconnecting/reconnecting

I have a pair of SoundbudSlim+ that I've been using for years on my phone. Trying to get them to work on the Pi4 running up to date Raspbian. I don't need the microphone, just the audio is fine. The ...
1
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1answer
22 views

Get metainformation at boot-screen

I asked myself if there is a possibility to get metainformation of the raspberry Pi (like IP4 Adress, MAC Adress etc.) displayed on booting process. Maybe extended with a timeout to read the ...
0
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1answer
33 views

Pi4B: touch LCD+HDMI monitor, touch area issues

I have a Pi4B with a fresh install of Raspbian. I have a 4" touch LCD on HDMI0, and a 13" non-touch portable monitor on HDMI1, and I configured the workspaces so they don't overlap. I enabled touch ...
3
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1answer
591 views

Boot Raspberry Pi 4 from USB

I have tried to boot a Raspberry Pi 4 from an SD card, and it is working fine. But when I was trying to boot the Raspberry Pi 4 from USB, it was not booting up. Is it possible to boot the Raspberry ...
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0answers
18 views

How to set up an Access Point / WiFi Repeater to connect through Bluetooth?

I had successfully set up my raspberry pi as an access point as WiFi repeater followed this guide: Access point as WiFi router/repeater, optional with a bridge. I would like to set up my raspberry pi ...
1
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1answer
23 views

Pi4B/Raspbian Buster: Dual screens no longer working after enabling touch

I have a shiny new Pi4B with a 4" touchscreen case (one of those XPT2046 ones). I also bought a portable 13" screen. The idea is to have a super-compact mini-computer on the go, and to be able to use ...
0
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2answers
57 views

Reading serial data from thermal camera MLX90640/GY-MCU90640 with Raspberry Pi 4 returns garbage characters

I am trying to read data from an MLX90640 thermal camera using the GY-MCU90640 board based on this tutorial. VIN is connected to 5V (4) GND is connected to GND (6) RX is connected to TX/GPIO14 (8) TX ...
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2answers
41 views

Raspberry Pi stops booting (mmcblk0: p1 p2) (Ubuntu)

I have a Raspberry Pi 4 since a few days and I've been trying to boot it with Linux Ubuntu since then. But it just stops booting every time I try it. The last thing which is displayed is [341.992834]...
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1answer
31 views

“Outside Function” issue with code when building a Reverse Park Sensor [closed]

I am using a Pi 4 to build a reverse park sensor based on these tutorials: https://forum.core-electronics.com.au/t/raspi-parking-sensor/3736/6 https://www.instructables.com/id/Raspberry-Pi-Park-...
0
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0answers
19 views

Raspberry Pi connect to external RFID Module FDX-B/Animals

I have purchased an RFID reader which is supposed to be able to read implants that are in animals RFID https://www.ebay.com/itm/134-2K-AGV-RFID-Animal-Tag-Card-Reader-Module-TTL-FDX-B-ISO11784-85-...
1
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1answer
48 views

How to setup static IP address on RPi 4 with VNC support

I have a RPi 4 running Raspbian buster. I would like to setup a static IP address for it with support for VNC. I have tried a number of tutorials and I have succeded in making a static IP address for ...
0
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0answers
66 views

Why does my Raspberry Pi 4 model B keep disconnecting from the Internet?

I have been using my raspberry pi to learn how to program games with python, and I have loved it so far... but there is one problem. Every so often, it will disconnect from my WiFi and will not ...

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