Questions tagged [pi-4]

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

Filter by
Sorted by
Tagged with
2
votes
0answers
52 views

Does Raspberry Pi 64-bit (aarch64) OS support Pi Camera module?

Does Debian Buster 64-bit (aarch64) have support for Pi Camera library? I have recently installed a 64-bit Debian Buster OS on my Raspberry Pi 4B, I switched from a 32-bit (armv7l) OS version, because ...
1
vote
2answers
47 views

Static Shocks from RPi Issue

my first post here, so hope it's on-topic for the forum. Straight to the point... I have RPi 4-4GB running Astroberry for astro-imaging. The RPi is in the Argon ONE V2 Raspberry Pi 4 Case, and the ...
0
votes
1answer
64 views

16 module relay board connection to RPi Zero W

I am using raspberry pi zero W for a home automation project. I am using 5V 16 channel relay board and using all the 16 relays as part of the project. I have not connected a separate 5V power supply ...
1
vote
2answers
86 views

How to access the mxL7704 through I2C on a CM4 (Compute Module 4)?

From the schematics it seems the MXL7704 is connected to I2C0. So I tried to enable the I2C0 by putting this on /boot/config.txt dtparam=i2c0=on dtparam=i2c1=on Unfortunately after a reboot I don't ...
1
vote
0answers
61 views

Pi 4B ignores HDMI mode 4 - 640x480, boots instead at 1024x768

I edited /boot/config.txt to use hdmi_group=2 and hdmi_mode=4; one HDMI monitor is connected to the first connector. It starts at 1024x768 instead. Only when I explicitly run xrandr --output HDMI-1 --...
1
vote
1answer
45 views

File Recovery from thumb drive - Bad Superblock

So I have a 64GB SanDisk Cruzer Glide, and recently something happened to it. Whenever I would try to fsck it said the magic number for the superblock was corrupted, I didn't know what that meant, so ...
0
votes
1answer
48 views

Access Multiple I2C Ports on Raspberry Pi CM4

I am working on the Raspberry Pi Compute Module 4. I would like to implement the 2 I2C ports for the 2 different types of sensors. (must be accessed within a single application) I am using the I2C ...
1
vote
1answer
37 views

How to connect pico gpio port to RPI4 gpio port

I have a sensor controlled by a Pico and a much larger embedded application controlled by a Raspberry Pi 4. When the Pico senses a condition, it raises a signal on a GPIO pin which I would like to ...
0
votes
0answers
28 views

Issues with usb cams initialising after boot RPi 4

I have a Raspberry Pi 4 Model B Rev 1.2, running Raspberry Pi OS Lite. I want to stream a usb webcam with vlc, which worked nicely/still works nicely on my 3b+. With the Pi 4 I am encountering a ...
2
votes
1answer
79 views

SD card pins melted on Pi 4

I'm running a Pi4 with a 32Gb SanDisk Extreme SD card and essentially just AdBlock. The board is powered by the official usb-c plug and has a passive cooling case around. Since last week my system ...
1
vote
0answers
34 views

Frozen Pi - Watchdog Fails To Defrost - What Now?

I have a headless Pi 4 in a remote location. It runs 24/7 mostly capturing and uploading web cam images every four minutes, but also performing other housekeeping tasks such as keeping a captive ...
0
votes
1answer
30 views

Custom keyboard gets "usb: connect-debounce failure" errors

I'm using the Raspberry Pi OS 64-bit version, updated to current, on a 4B with 8 GB RAM and a 512 GB SSD via USB3. I'm trying to use it with an IBM 122-key Model M keyboard with a custom STM32F411 ...
0
votes
0answers
37 views

Will this work for the Pi 400?

I'm planning to buy one of these USB-A to 3.5mm Audio jack for the Pi 400 since it has no audio jack... https://www.amazon.com/gp/product/B089NJPSXN I don't have the option to use HDMI audio output (...
0
votes
1answer
43 views

raspi-config won't let me expand my filesystem

I used the included SD card to install my raspbian (Buster, I think) on a 32GB card. For some reason the card filled up (that will be a question for another day), so I copied an image of the card to a ...
1
vote
0answers
26 views

BlueZ 5.58 Connection Fail

I am working on the BlueZ 5.58 library using the Raspberry Pi 4. So far, I am able to install an updated version of the BlueZ 5.58 & making sample test cases. (refrance BLE GATT Server) While ...
0
votes
0answers
89 views

Raspberry Pi Secure Boot Configurations with Authentication IC

I am working on the Raspberry Pi Compute Module 4 with raspbian buster (command line only) os. I want to secure my Raspberry Pi, I have read some solutions on that. As I see there some manufacturers ...
0
votes
0answers
22 views

BlueZ 5.58 Authentication using Public & Private key

I am working on the BlueZ 5.58 library using the Raspberry Pi 4 module on Raspbian OS. I have found that the agent.py application has implemented the public-private key & fixed key authentication. ...
0
votes
0answers
54 views

Why isn't my Raspberry Pi connecting to a certain network?

So, it started when I was in the middle of updating code for my Discord Bot on my Raspberry Pi on Visual Studio Code. I had to use Team Viewer to make it easier to access (instead of having to switch ...
0
votes
1answer
56 views

Raspberry Pi 4 refuses to boot from USB (128GB)

OK, Raspberry Pi does not boot from Raspbian USB...
1
vote
0answers
69 views

Raspberry Pi Pre-Installed BlueZ

I am working on the Raspberry Pi 4 board with the Raspbian Buster OS. I have found that the BlueZ library Pre-Installed on the Raspbian Buster OS. pi@raspberrypi:~ $ bluetoothd -v 5.50 pi@raspberrypi:~...
0
votes
1answer
55 views

Raspberry Pi Compute Module 4 - USB

I am using the Raspberry Pi Compute Module 4 & referring to the Raspberry Pi DataSheet. Here I found that the Compute module has only one USB port. I would like to use multiple USB ports & I ...
2
votes
2answers
92 views

raspberry pi 4B no /dev/spidev0.0

As it says in the title my raspberry pi 4B is missing /dev/spidev0.0 I'm trying to use an adxl372 accelerometer with a raspberry pi 4B. I built a kernel with industrial io drivers and the proper ...
1
vote
1answer
43 views

can Rpi 4 model b work as keyboard emulator to two pc?

I am using Raspberry pi model B. I Connected one keyboard to it in usb2 port and I want to write in two pc whatever i am typing on keyboard. right now i tried for one pc. connected keyboard and OTG c ...
0
votes
0answers
28 views

"Bad message" when trying to access a directory on external hard drive

I'm running a media server using a Raspberry Pi 4 with an external hard drive connected via USB 3.0. One issue I've been seeing for a while is "Bad message" returned when I try to ls or stat ...
1
vote
0answers
50 views

Can I use a PoE+ hat (802.3at) on raspberry pi with a PoE (802.3af) switch

I've wanted to setup some rpi4 with PoE hats and a PoE switch. I've seen in local markets that both old PoE hats and PoE+ hats have the same price. I've also seen that the old PoE hats have no stock ...
2
votes
1answer
58 views

Multiple Pi Zeros over USB-Ethernet: is there a limit?

I want to connect 10 Pi Zeros via Ethernet over USB to get 10 Pictures at the same time. My Host machine is a Raspberry Pi 4 4GB running Ubuntu 21.04. I got everything running as I want to with 7 ...
0
votes
0answers
32 views

Raspberry Pi 4 Touchscreen Not turning on

So, I recently decided to upgrade an old project from a raspberry 3 to a 4. This raspberry Pi is powered over Ethernet and needs a touchscreen attached to it. After I connected the PoE hat and the ...
0
votes
0answers
166 views

Using a USB Bluetooth dongle on Pi 4

I recently purchased the Techkey Bluetooth dongle since I know the Pi system is unable to connect to multiple Bluetooth devices simultaneously. Unfortunately, I haven't had any luck doing so. I got ...
5
votes
3answers
2k views

How can I factory reset my Raspberry Pi 4 model B?

I got my Raspberry Pi 4 yesterday and have already managed to uninstall the browser. I don't want to go through the kerfuffle of reinstalling everything that I deleted and since I haven't done much on ...
0
votes
1answer
30 views

Raspbian 10 boot on Pi3 but not boot on pi4 [closed]

I have a copy of a working raspbian 10 SD card. When I clone it, clone SD card didnt boot on pi4 giving error: print_req_error i/o error dev mmcblk0 sector 0 buffer io error on dev mmcblk0, logical 0,...
-3
votes
1answer
67 views

Chromium keeps crashing on my overclocked Pi 4

I am using a Raspberry Pi 4, with 8GB of RAM. I have overclocked my Pi 4, with over_voltage=6, arm_freq=2000, and gpu_freq=750. However, I have been having a problem with running Chromium. Whenever I ...
0
votes
0answers
27 views

TwisterOS: how to change cursor theme in twister os?

I have been using TwisteOs for a while... and I want to know if it's possible to change the cursor theme in TwisterOs? if so how do you do it?
0
votes
0answers
30 views

ssh "connection timed out" after rebooting

I got an Raspberry Pi 4 4GB running Ubuntu 21.04 Desktop. I want to connect via ssh to my Raspberry Pi Zero (without Wireless) running Raspbian lite. For the ssh setup i followed the instructions ...
1
vote
0answers
28 views

Raspberry PI wireless access point poor range

I have configured my Raspberry PI 4 as wiresless access point for my hobby project. I have used this tutorial: https://www.raspberrypi.org/documentation/configuration/wireless/access-point-routed.md I ...
0
votes
2answers
42 views

Do not see raspberry PI in network after install with Raspberry PI imager

I've installed Raspberry Pi OS Lite on flash drive with Raspberry Pi Imager. After that I've added SSH and wpa_supplicant.conf (I've taken this example to create the config). And after that I've ...
0
votes
0answers
34 views

Cannot install Docker-Compose - Docker is installed

I recently bought a Raspberry Pi 4 Model B with two 32GB SD cards. I installed Raspbian on the first card and I have played with it for a few weeks. I installed Docker; Docker-Compose and created a ...
1
vote
0answers
19 views

Which bipolar stepper motor can be used with EasyDriver4.5V A3967?

I have EasyDriver 4.5V A3967 driver and planning to purchase 12V bipolar stepper motor with specs phase: 2 phase voltage: 12 V current: 0.7 A. Phase resistance: 4.0 ± 10% Ω phase inductance: 3.2 ± 20% ...
0
votes
1answer
26 views

New Raspberry Pi 4 boots to black screen

I'm pretty new to the Raspberry Pi world and I just bought my first one (4 model B 8GB). I downloaded the raspberry pi OS full (23-BIT) and used the Raspberry Pi Imager to put on my Samsung 64GB Sd ...
0
votes
1answer
364 views

How can I change the audio output device from the command line?

I want to be able to change the audio output device (hdmi or aux) from the command line, preferably, without having to sudo. I'm on a RPI4 with Raspbian-lite Buster. On the RPI3 I was able to use ...
0
votes
2answers
393 views

sudo apt-get update problem

I was trying to update my RPI. $sudo apt-get update , and this was my result: Reading package lists... Done E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) E: Unable ...
0
votes
2answers
82 views

Incorrectly configured black border pi-4

When you install and configure the raspberry pi desktop for the pi-4 you can select a box if you have black border on your screen. I selected this box but when I restarted the edges of the toolbar and ...
2
votes
1answer
38 views

Does the Raspberry Pi 4's processor support ARM's SHA256 instructions?

According to Wikipedia, every Armv8 processor should support sha256 hashing instructions however /proc/cpuinfo doesn't list it. Could there be a failure to identify the feature by the kernel? ...
0
votes
0answers
20 views

Is it safe to change the power settings to allow raspberry 400 to power using usb?

I recently got a raspberry pi 400 and wanted to use it as a portable device but realised that it can only get full power when plugged into a power socket. I saw a video showing that you can use it ...
0
votes
1answer
33 views

Install RPi OS from a zip file (No image)

I have a new RPi 4 and I have installed NOOBS from a zip due to the fact that I cannot install software on my computer as it is loaned from my school (i.e. image writing software) However, once ...
0
votes
0answers
32 views

Turning switch on lowers voltage from 5.2v to 3.0v

This is probably a simple question, but I’ve researched a lot and haven’t been able to figure out how to fix the problem. Basically, I have a Raspberry Pi and a 5-inch LCD screen wired to a toggle ...
0
votes
0answers
55 views

U-Boot DTB for Raspberry Pi 4

I'm trying to use U-Boot with RPi 4 Model B with the CONFIG_DEFAULT_DEVICE_TREE set to a dtb file. However, I cannot seem to find an rpi4 u-boot dtb in the arch/arm/dts folder. Is there a separate dts ...
1
vote
0answers
59 views

Disable boot-time messages

I'm on Rpi-4 and the OS is DietPi. I have modified /boot/cmdline.txt using the following parameters to disable all and every boot-time logs: console=tty3 root=PARTUUID=907af7d0-02 rootfstype=ext4 ...
-1
votes
1answer
83 views

Four long blinks, four short blinks

Have a brand new NEEGO Raspberry Pi 4 kit. 32 GB micro SD, with NOOBS supposedly installed. Start it up, I get four long blinks of the green LED, followed by four short blinks. OK, I have a Pi 3B, try ...
0
votes
0answers
64 views

How to install sklearn.model_selection on raspberry pi 4?

I have bought a Raspberry Pi 4 and I'm having trouble installing SKLearn. I did sudo pip3 install -U scikit-learn and from what I could tell it installed fine. Then I tried to lunch my .py programs ...
3
votes
1answer
321 views

How to make the motion of a servo motor smoother?

I am having some trouble with controlling the motion of the servo motor. When I run my code, the servo motor moves in the specified range but the motion seems a bit erratic. I would be really grateful ...

1 2
3
4 5
30