Questions tagged [pi-4]

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

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67 views

How to install internet explorer and/or x86 emulator on raspbery pi 4b

I have a rasbery pi 4b 8gb and I want to install internet explorer on it. I am running ubuntu 21.10. I tried installing internet explorer 8 with PlayOnLinux and the installing window says "...
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51 views

I cannot save data sent from Arduino Uno to Raspberry Pi

I am trying to send sensor reading from Arduino Uno to raspberry pi and I want to save this incoming sensor reading to SQLite which I downloaded to Raspberry pi. I used lm35 sensor on Arduino Uno and ...
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1answer
36 views

Raspberry pi 4b Network Scanner, network interface file issue

I am brand new to raspberry pi and have been trying to follow a few tutorials to try to set it up as a network scanner (https://www.hackster.io/aallan/a-raspberry-pi-network-scanner-e3dbbc , https://...
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213 views

L298n driver with 3.3V Voltage

I am using L298N motor driver for DC motor. First, I tested the motor with Arduino, by giving PWM signals to the enable pin of the L298N pin. I have two questions: Arduino can supply average 5V ...
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1answer
77 views

Raspberry Pi 4b choppy mouse and keyboard input

I just purchased a Raspberry Pi 4b with 4 GB of RAM. It came with a power supply and a 16 GB microSD card with Pi OS (Raspbian) pre-installed. I started it up and ran through the initial ...
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27 views

Application to rotate PI

We wrote a small application for end-users to rotate the screen on the Raspberry PI 4, so they would open the application and click the rotation they need. If I change the orientation manually in /etc/...
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1answer
59 views

After shutdown/poweroff command, is it possible to damage a pi (4) by leaving the Powercable in?

So I have a Raspberry Pi 4 type C 5V 3A adapter plugged into the power extender thingy at all times. My question is, once you type the poweroff command into the terminal and see the device turning off,...
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14 views

Displaying an image on startup

I'm making a custom sheikah slate model, and I thought a screen displaying the map would be a very cool addition. The model will have no way of interacting with the Pi outside of turning it on, so it ...
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20 views

Pycharm support?

I want to learn Python using PyCharm editor. What operating system (Raspberry OS) does PyCharm support?
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127 views

AirPlay to two displays using RPiPlay

I was wondering if it is possible to use RPiPlay with two monitors to extend my Macbook display. I tried connecting the two HDMI ports to the Raspberry Pi but, RPiPlay uses only one HDMI port for ...
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33 views

Serial communication over uart - Android raspberry pi 4

Is there a library/source code available for serial communication over uart for the raspberry pi 4 running Android?
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88 views

Turn PI screen portrait

Where can I put this command to make sure the PI will execute it every time on startup. xrandr -o left I have tried with startup.sh and /boot/config.txt but still no luck
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29 views

Is it possible to power a pi 4 from 1 source and turn on and off using another power source?

I have a raspberry pi 4 and 2 5v power sources. 1 of the power source is always on and i would like it to power my pi. The other one i will be connecting to a 5v to 3v converter and connect it to a ...
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160 views

HDMI No Signal on LG TV (but works on other TVs)

I was at my parent’s for the weekend and I used the time to setup OSMC on my new RPi 4. They have an older (~10 years) Samsung TV and everything worked fine (including CEC or whatever it’s called on ...
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303 views

VLC cannot read videos on Pi-4 with RPi-OS

I just bought a RPi-4, installed the official Raspberry pi OS, and discovered that VLC cannot read .mp4 videos encoded with H264. VLC can play the sound but not the video. I can only play the videos ...
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37 views

MG 996R Servo only works in one direction with pi 4b

I have an MG 996R Servo from DM DIY More hooked up to physical pin 18 of my raspberry pi 4b running python 2.7.16 with GCC 8.3.0 on Linux2. I am powering the servo with an external 5V supply capable ...
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22 views

Internet drops out when I connect my Raspi to netowrk

After setting up my Raspberry Pi to act as a NAS things worked well for a few days however today whenever the device is connected via Ethernet to my router the internet cuts out for all devices ...
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156 views

How do I install an older version of ubuntu on raspberry pi 4?

I need to install an older version of Ubuntu (20.04) desktop version for compatibility reasons. The Raspberry Pi imager v1.6.2 on windows only shows Ubuntu desktop 21.10 as available. I tried to ...
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123 views

Hx711 gives random values with RaspberryPi 4

I created a weight scale using a RaspberryPi, Hx711 and 4 load cells. I followed this tutorial and did everything like shown there. This is the circuit they used: I also used tatobari's hx711py ...
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36 views

Best version of Plex to run on a Raspberry Pi 4 Model B

I'd like some help selecting the ideal Plex Media Server installation method for a raspberry pi 4b. I have installed the Snap before and it worked well. There's the Armv7 deb file I could download ...
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26 views

how to install chrome on rpi4 no exagear? [duplicate]

does anyone know how to install chromE(not chromIUM) on a raspi 4 without virtualization and stuff like exagear? i dont really care if it is hard to do but i need chrome on raspi4 running latest raspi ...
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16 views

Desktop inside a desktop after changing HDMI 2 resolution

After starting one time my Raspberry Pi 4 without the HDMI cable plugged in, I had the resolution 1024x768. I set the right resolution to 1920x1080. It looks good, but now looks like I have a square ...
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62 views

Blank screen with *working* cursor & input on startup

Background: I’ve got an RPi4 running TwisterOS. I installed Lutris and a game on it. The game worked fine, but was running in windowed mode, and I couldn’t get it to run in fullscreen. I went into the ...
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27 views

Best way to add a button to a RPI4 case

I need to add a single button (mostly for safe shutdown, but I'd also like to hook some scripts to run pre-shutdown) to my RPI 4 builds, however most RPI cases under $20 don't seem to have a place to ...
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1answer
52 views

Skip 1second in play mp3 the first time

I'm using Rasp4 and I'm trying to let rasp speaks using gtts-cli. It works but the first time I play it skips more or less 1 second. I run this command: gtts-cli -l en 'Good morning my dear friend' | ...
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2answers
37 views

Raspberry Pi 4 GPIOs are constantly on, even after restarting and cleaning up GPIOs

So, I got a Raspberry Pi 4 Model B, and I'm trying to make a project using relay boards. Turns out, when I turn on my Pi, one of the pins is already active and the indicator turned on partially. I ...
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2answers
56 views

Can I connect a Raspberry Pi 4B to an Arduino Power Supply Module? And if so, how?

simulate this circuit – Schematic created using CircuitLab I am trying to use an Arduino Power Supply Module to provide enough power to allow at least 5V and 10 mA through to an external supply. ...
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21 views

Is it possible to change a matrix keypad to a touch screen with kivy

I have an old test system control board, where the matrix pad went out. Control Board https://www.ebay.ie/itm/Cincinnati-Test-Systems-PD1277-U3-Control-Board-for-Sentinel-F-21-Flow-Tester-/...
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42 views

Why do I get very slow internet wired connexion on my Pi4 while my desktop PC is doing fine?

Issue I'm hardly getting 100--140Mbps on my Pi4 (model B rev. 1.4 at 8GB ram) through wired ethernet cat 8 connection to a 2.5Gb port on my router. Plus, the upload speed is higher, reaching 350Mbps (...
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8 views

RPI4B WIFI Dies When Running As An Access Point

My RPI4B is configured to act as an access point, now once or twice a day the wifi will stop working, and I will have to login using the ethernet port and reboot the RPI. The only thing I see are ...
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1answer
21 views

How to detect if the user is booting from microSD versus an external USB drive (e.g. SSD)?

I am writing a bash script and I really want a way to detect if the user has booted from a microSD card versus an external SSD drive connected via USB. Ideally, this should work with any PI3/4. I am ...
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2answers
121 views

Pi 4 hangs often; only power cycle brings it back

I've got a Raspberry Pi 4 that keeps hanging. It becomes completely unresponsive and I have to physically power-cycle the Pi to get it to respond again. I could be wrong, but I have observed that it ...
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1answer
122 views

CircuitPython Interface with I2C Device

I have an I2C device with address 0x62. I know this because I plugged it into my RPI 4B and ran sudo i2cdetect -y 1. I see the device, if I remove the device power and rerun the command, the device is ...
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1answer
35 views

Raspberry Pi 4 b+ with SIM900A Module Error

I'm working on a project that includes send a SMS message. I have tried connecting my raspberry pi with sim900a. Having problems with communication with sim. I've tried using AT commands with minicom ...
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1answer
60 views

Standard USB C Power Supply and Overclocking

Is the standard (official) raspberry pi usb c power supply able to reliably supply a raspberry pi 400 with overclocked cpu and gpu? Meaning so that the pi gets enough watts to run at maximum speed ...
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2answers
99 views

Why does the latest raspbian update disable some wifi frequencies?

I started with a fresh installation of Raspberry Pi OS Lite (Release date: May 7th 2021, Kernel version: 5.10) and checked wifi state with iw reg get iw list. global country DE: DFS-ETSI (2400 - 2483 ...
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122 views

Vulkan on Raspberry Pi 4 does not work after reboot

I tried to install Vulkan on my Raspberry Pi 4 running Raspberry Pi OS 64 bit and Ubuntu mate 64 bit. It worked out and I tested the examples of Sascha Willems, but after a reboot of my Raspberry Pi I ...
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1answer
332 views

Cannot install pi-apps

So I've recently tried to install pi-apps using: git clone https://github.com/Botspot/pi-apps and it cloned, but when I used: /home/pi/pi-apps/install it gave me this error: The command 'sudo apt ...
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35 views

How to enable display connector during runtime?

I use two hdmi ports during runtime. One for display with user interface (HDMI-A-1) and one for projector (HDMI-A-2). I had to disable the connector with the projector (HDMI-A-2) during the boot ...
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28 views

TinyCore OS installer via qemu causes kernel panic

I run RasperryPi OS on a Pi 4. I want to emulate/install TinyCore OS on a qemu virtual machine. I am not sure if my problem rely's on the underlying Pi4 hardware? This is how I run the iso I ...
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44 views

How to control door opener from raspberry pi?

I am trying to control a 6V DC door opener which requires 660 mA current supply. Since the Pi only tolerates a maximum of 5V without a relay. As per my research I need a solid-state relay with ...
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3answers
56 views

why doesn't spi1 in pi4j work?

I'm trying to connect raspberry with another pcb via spi. It is connected via spi1 port and I can't change it. So I have a python script that works well, so I can send and receive data. The python ...
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16 views

Touch Diaply, GPS pHAT and Pi4 voltage amps needed

Have configured a Pi4 5.5 touchdisplay and a sparkfun GPS-RTK Dead Reckoning ZED-F9R. Looking to power this from a 12V supply. Been using a stepdown converter like this. DC 5V Step-Down Converter Buck ...
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1answer
108 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 ...
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82 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 ...
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21 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 ...
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3answers
472 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 ...
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2answers
51 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?
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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. ...
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2answers
111 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, ...

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