Questions tagged [pi-4]

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

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0answers
18 views

Error installing tensorflow

I recently purchased a Raspberry Pi 4 Model B and after a week I have accomplished nothing because I can't get tensorflow installed. Hoping someone can PLEASE help me. My error message: E ...
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1answer
22 views

Same code different output between Pi3 and Pi4

I got a simple rfid reader (brand unknown) connected to the serial0 rx port of a Pi4. Uploaden the following code and works perfect. class RFID(): def __init__(self): self.ser = serial....
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17 views

Obstacles to installing Bionic Beaver on rPi4?

19.10 succesfully installs, however, this is not the case with 16.04. I would expect that Bionic beaver will not install because like, 16.04 the rPi was released after Bionic beaver. What exactly ...
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15 views

Should I avoid using WP with some sort of visual composer when hosting on my Rapberry Pi 4? Is there a better and equally easy approach?

I've been told a WP-install can easily consume 2 Gigs of memory when editing in visual composers in WP. When my Pi only has 4 GB available and on top on that I'm running MariaDB (NOT Nginx), then ...
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0answers
35 views

Will USB 3.0 HDD hosted files be quicker to access than the SD and can I stress-test my Pi 4 hosted site? [closed]

EDITED to fewer more specifik questions: As stated I want to run a semi-small website with some customer-chat plugins and a user database in WP on my Pi 4 (the 4 GB RAM version). It should be up and ...
1
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1answer
29 views

Can I use the sd card from my Raspberry Pi 3 in my Raspberry Pi 4 for Kali Linux?

My Raspberry Pi 3 model B recently stopped working and I am planning on getting a Raspberry Pi 4. I was wondering if I could use the sd card with Kali Linux from the Raspberry Pi 3 in my Raspberry Pi ...
2
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0answers
19 views

power problem with pi4 and 7" touchscreen

I have a Pi4 that I have connected to a 7" touchscreen. The touchscreen is powered by a microUSB cable, the Pi4 is then powered through the GPIO, per the instructions. I keep getting the low power ...
1
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0answers
25 views

Pi 4 able to run Kodi and Deluge at the same time?

I'd like to run Kodi and Deluge at the same time on a Pi4. Deluge to be an always-on torrent box, and Kodi for streaming TV/movies to my TV. Will the Pi4 be able to handle both tasks at the same ...
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1answer
24 views

Getting 2560x1600 resolution from RPi 4B on HP LP3065 monitor

I have a HP LP3065 workstation monitor which is 10+ years old and it only has 3 DVI-D Dual-link inputs. You can see its specs here. It can only work in native resolution 2560x1600 or quarter ...
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0answers
14 views

Voice-enabled QnA bot [closed]

I want to develop a custom voice-enabled QnA bot. I am relatively new to the raspberry pi. I want to know if such a project is possible with this kind of hardware that raspberry pi offers. Please ...
2
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1answer
42 views

Relay does not turn off

I am trying to control a 4-Relay module with my Raspberry Pi 4. I tried to do that by writing this script: import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BOARD) relais_1 = 8 relais_2 = 10 ...
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3answers
3k views

Where is Raspberry Pi “wastebasket” located in the file system?

I am trying to understand the Raspbian file system better. I opened properties on the Raspberry Pi's "Wastebasket" hoping to find out where it is located in the file system and I found trash:///. ...
1
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1answer
50 views

Enable up to 5 SPI on Raspberry Pi 4

I'm trying to enable all the SPI Ports on my raspberry pi 4 (as mentioned in the datasheet). I already enable the SPI interfaces over the raspi-config tool but that only gives me spi0.0 and spi0.1 ...
2
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2answers
124 views

How to configure Ubuntu 19.10 Raspberry Pi 4 wifi to automatically connect?

How do I configure wifi to automatically without rebooting? For example, like phone, when my phone detect wifi that has connected, it connect the wifi network automatically without reboot and any ...
1
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1answer
23 views

Rpi 4 Pin 29 default to High pull?

I am fairly new to Raspberry PI GPIO pins. I have some simple code which sets Pin 29 (BCM 5 in this picture) as an IN (READ) Pin and then reads from it after boot and on raspberry pi 3 it has always ...
1
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0answers
30 views

Is it possible to log in Raspberry Pi 4B using USB cable?

The idea comes from this website 4 ways to connect RPi4 to the Internet. The author said that it is possible to SSH into RPi4 using that method. But my PC only provides 5V 500mA current through USB ...
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0answers
37 views

Lubuntu-desktop on Raspberry Pi 4 (4gb) 19.10 ARM64

When I flash the arm64 image onto one of my Raspberry Pi 4B (4gb ram) from here (64bit version: https://ubuntu.com/download/raspberry-pi) and then do an install via apt of lubuntu-desktop, it gives me ...
1
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0answers
13 views

How to lock the gain in picamera.campture_sequence command?

I am using picamera library in python to capture a sequence of pictures. The picamera is connected to a microscope and the microscope moves to different vertical positions and picamera capture images ...
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0answers
92 views

Raspberry Pi 4 no wifi after update && upgrade

I am new to Raspberry Pi and Linux. I followed all the setup guides and have a 4" touchscreen with a case. I downloaded MPI4008-4.0inch-2019-07-10-raspbian-buster.img and flashed it to SD. I had to ...
0
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0answers
44 views

The USB ports do not work anymore on my RPI4

Since yesterday, the USB ports of my RPI4 do not work. When I plug a usb device like a hard drive or a usb stick, I don't see any message about it in the logs and no new device in /dev. When I type ...
2
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1answer
38 views

Raspberry Pi 4 does not see 5GHz networks

I've got myself a new Raspberry Pi and installed Raspbian (fullest of editions) using NOOBS. During installation (i presume for package download) Raspberry clearly saw and was able to connect to my ...
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0answers
38 views

USB Microphone Not Working

I am trying to create a magic mirror with my Raspberry Pi 4 (buster) that has voice recognition so I am using a usb sound card with a 3.5 mm microphone. The problem is that I have configured my alsa ...
0
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1answer
52 views

Maximum Raspberry Pi 4 WiFi hotspot clients

I have configured Raspberry Pi 4 as a WiFi hotspot with hostapd on Raspbian Buster. I connected 10 clients, no problem. I want to use it as a Free WiFi. So, I concern to know how many clients could be ...
2
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1answer
76 views

Configure my Raspberry Pi 4 B to become a Tor-powered Hotspot

I want to be able to connect from my computer to my pi to automatically connect to tor. This would entail that when I can technically use Tor from any browser on my computer. I have tried methods ...
1
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1answer
23 views

Experience with LinuxGSM

I'm looking to buy a Raspberry Pi 4B (4GB) do run a Ubuntu 19.10 server from. I read that the x64 version is supported so I was wondering if the following is still an issue. Will LinuxGSM run on ...
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0answers
61 views

Issue connecting to my Airpods from Pi 4

I am a newbie and recently purchased Pi4 Vilros Edition. Was just exploring my Pi4 and tried to connect my Airpods to it. It shows up in the bluetooth devices, but it wouldnt pair or connect. I get ...
1
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0answers
29 views

Connecting via Ethernet VNC

So until now, I've been using VNC to connect to my raspberry pi 4 with my raspberry pi 4 being allocated an IP address through my router. Now I need to be able to connect to it via ethernet cable. ...
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0answers
20 views

How to lower the power of an RT2870 USB Wlan adapter on Raspbian

I have to lower the range of a wlan adapter to limit the area I'm capturing data in. I'm using the newest version of Raspbian, Pi 4 and the adapter is ralink rt2870 I've tried adjusting the txpower ...
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0answers
41 views

Distinguishing RPi4 models with USB-C issue and without

The first model of the RPi4 seems to have an issue with USB-C, as reported by ArsTechnica. The effect is that E-marked cables do not work well. The Raspberry Foundation has confirmed this issue and ...
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0answers
24 views

Pi 4 video recording/encoding/writing super laggy after few seconds?

I've got the 4GB ver of the Pi 4. Trying to using it with Motion-Project and a NoIR Camera Module V2. Problem is the moment recording starts, it's fine for about 1-3 seconds, then becomes super laggy. ...
1
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1answer
36 views

What are those ALSA Subdevices and what are they used for?

New to the community. I was curious about one specific part from the ALSA driver on Raspberry Pi 4 (or even on other Linux machines using ALSA). So $ aplay -l lists all current audio devices, but ...
1
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1answer
66 views

How to OpenVPN auto-reconnect on Raspberry Pi 4

I hope you are well. I set up OpenVPN on VPS for 5 clients (but I only use 3). I noticed that OpenVPN automatically reboots every day at 4 am. So far so good; The problem is that of the 3 client ...
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0answers
24 views

Manufacturing Mechanical Enclosure for Pi boards

Can I design mechanical enclosures for Raspberry Pi boards and sell them without permission? Or do I need to take permission or register before this activity?
2
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0answers
44 views

Pi cannot boot when encrypted USB SSD drive is attached

I have a Pi 4, running Raspbian 10 Buster. I have an attached SSD drive with LUKS encryption. When I restart the Pi, it wouldn't boot if the SSD is attached. Once I unplug it, it boots well and I can ...
2
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2answers
181 views

Setting up Raspberry Pi 4B to be a wifi access point

I want my Raspberry Pi 4B to create a wireless network that connects to my router, without using any external devices to assist the pi (ie. a secondary router or an antennae that would connect to the ...
1
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1answer
45 views

raspberry 4 goes black after setting the resolution to 4k

My Raspberry Pi 4 was working fine but as I was using it on a 21:9 3840x1440 screen I decided to set that resolution for the raspberry as well. However, very quickly after it went totally black and my ...
1
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1answer
52 views

WLAN module gone - RPI 4 B+

The WLAN module of my RPI 4 B+ disappeared. At first I thought that the hardware component had blown. How can I properly diagnose whether there is a hardware or software problem? What I have done for ...
1
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1answer
43 views

can I use two 4 TB disk powered by USB on RPI-4? No external power supply

I use 1 usb powered 4 TB disk sda without issues on RPI-4. Now I added a second usb powered 4 TB disk sdb and receive lots of errors (from both devices): # lsblk NAME MAJ:MIN RM SIZE RO TYPE ...
1
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1answer
70 views

Copy/Paste Windows text to Raspberry Pi 4 shell stopped working after update on Raspbian Buster

Earlier today I could copy/paste text from a windows text file into a cmd shell on brand new Raspberry Pi 4 running WiFi headless, accessed using VNCviewer. After apt update, apg full-upgrade then ...
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0answers
16 views

Virtual register address translation on the raspberry Pi 4

When taking a look at the manual of the BCM2835 (which seems to be the correct one for the BCM2711), we can see, for example, that the base address of the SPI device is 0x7E204000 (page 152). Assume ...
1
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1answer
14 views

Migrating MariaDB from Stretch to Buster

I am currently in the process of migrating my ownCloud from my old Pi 3B to a Pi 4B. On the 3, I made a backup of my MariaDB with mysqldump: mysqldump --single-transaction --routines --triggers --all-...
1
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1answer
48 views

Raspberry Pi 4 Wifi disconnected after change screen resolution

I'm having some problems with Raspberry Pi 4... The wifi works normally when I use 1920 x 1080. But when I change the resolution from 1920 x 1080 to 1280 x 720, the wifi suddenly disconnected and ...
3
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1answer
360 views

Powering difference between different Raspberry Pi 4 models

Raspberry Pi 4 has three models which have 1GB, 2GB, and 4GB of RAM. Is there any difference between these models for powering?
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0answers
30 views

USB PCIe with RPi 4 for Graphics Cards?

So I found these USB PCIe adaptors on Amazon for a decent price. Given the new USB 3 capabilities of the RPi 4, would it be possible to use these to connect an older (not modern) graphics card like an ...
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0answers
23 views

How to enable user/ipc/network namespace sandboxing on for Firefox 71 on Ubuntu 19.10 arm64?

System: Raspberry Pi 4B, 4GB Linux 64bit, uname -a: ubuntu 5.3.0-1014-raspi2 #16-Ubuntu SMP Tue Nov 26 11:18:23 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux. Firefox 71.0 64bit "Mozilla/5.0 (X11; ...
2
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1answer
86 views

Share USB tethered phone to Raspberry Pi 4 LAN port

I want to share my phone data by connecting to my pi4 running buster. I wish the data to pass through the ethernet which has a router connected to it. The router has both wireless and wired ...
0
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0answers
35 views

Untrunc / repair mp4

I have been trying all day to get untrunc installed on my Raspian (Pi 4) but have not made any headway. https://github.com/ponchio/untrunc is what I've been following. After that compile step, I ...
0
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1answer
35 views

Issues with updating screen resolution on a headless pi using VNC

Updated my screen res to 1080p using sudo raspi-config. After a reboot, VNC is still showing it as the same old small box. I have disabled overscan but can't really find any information on this issue....
1
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1answer
24 views

RPi 4 First Boot: Blank TV Screen and SD card become “RCOVERY” with MBR, READ OLNY

It's my first experience with the Raspberry Pi. I bought RPi B 4 with 2GB RAM, before starting off I go through RPi videos, tutorial and finally loaded Noobs into 16GB Sandisk memory card. I plugged ...
4
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3answers
223 views

Serial output in case of no OS

I am using the raspberry pi 4. I have no screen connected to the raspberry pi, I do everything trough ethernet cable. I am currently changing kernels and thus sometimes I cannot boot, since I created ...