Questions tagged [pi-4]

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

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16 views

How do I fix a Raspberry Pi 4 that isn't displaying anything?

The problem first started when I tried to change the orientation of display for retro pi. Before, the orientation was vertical. So I tried to change the resolution options in "Raspi-config" ...
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9 views

How to remote desktop connect to a windows device using raspberry pi

What is the best way to remote desktop connect to a windows device using a raspberry pi and xrdp? For reference I am using a raspberry pi 4 running raspbian OS
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Raspberry Pi 4 shows black screen

I've tried booting with RPi os lite, and Ubuntu 20.04 64 bit. It shows the boot screen, but when it boots it shows a black screen. I tried burning the SD Card Boot bootloader, and that shows a green ...
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Depth measurement using stereo vision [closed]

I have a Pi-4 board with a Arducam Multi Camera Adapter Module V2.2. I have connected two cameras (5 MP) to the hat. But I am unable to get two images clearly to estimate the depth. Can anyone help me ...
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RaspBerry Pi pwmchip0 doesn't always work

I'm in a project currently using the RPi's pwmchip0 to implement Hardware PWM. I added the dtoverlay = pwm-2chan in the cofig.txt. Now when I follow that explanation https://jumpnowtek.com/rpi/Using-...
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SPI transfer random delays

I am using two SPI devices to talk to a MCP23S17 (SPI0) to multiplex the chip selects (CS) for four SPI slaves (SPI1). The loop is running at 500 Hz, the transfer takes roughly 900 us. Most of the ...
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8 views

ssh to net booted raspberry pi 4

I have tried to net boot raspberry pi from another raspberry pi, But not getting clue, how can I ssh to newly booted raspB. I tried to add ssh file (empty file) in the boot partition (inside /tftpboot ...
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raspberry pi 4 keeps re-showing the log in page (kali-linux for raspberry pi)

So basically when I try to log in, and when I put the username and password, it just go black and then re-shows me the log in page. And if my username or password is incorrect, it says incorrect ... ...
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Pi4 'Apt-get update' not working per 'Too many symbolic links'

After migrating much of my previous install to a now SSD, I'm no longer able to run 'sudo apt-get update' though 'upgrade' and everything else works fine. I get this whey trying:` Get:1 http://archive....
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34 views

Is my pi4 dead and How to determine what exactly happened?

Apparently, I somehow bricked my new pi4. When I plug it in, the red (power) LED is working, but the green one (boot) is not. To be exact: when everything, including the SD card is taken out the pi, ...
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1answer
31 views

Neopixel with raspberry pi

I am using a neopixel for my raspberry pi project. I am trying to control 30 pixels and the strip is 20cm long. Can I use it just by using the pi's 5v pin? Also if I it is possible, how long should ...
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Interfacing QMC5883L with raspberry pi 4B

I am using a magnetometer which is QMC5883L and NOT HMC5883L. All the documentation, codes and tutorials, help in interfacing the HMC5883L module, but there are very limited resources which help in ...
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Input/output error when transfering large files to external SSD

I have a Raspberry Pi 4 with the last Raspbian (with Linux 5.10.17-v7l+). It has the official power supply, and an external SSD (Western Digital 550 GB on a USB 3.0). It can run fine for long periods ...
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1answer
25 views

wiringPi compile issue on RPi 4B 64bit

I am trying to compile my C++ project using CMake. My Raspberry Pi OS does include /usr/include/wiringPi.h and all the required .so files in /usr/lib/. Here is the output of gpio -v command: gpio ...
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PI 4 Touchscreen unresponsive after first boot

this is my first post here. I recently got a Raspberry pi 4 B 2018, 64bits & 8GB ram. With this I have a touchscreen that I plugged in the "DISPLAY" ribbon cable socket. So far so good. ...
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How to start program on specific monitor?

There are 2 displays attached to Raspberry Pi 4 over HDMI. pi@raspberrypi:~ $ DISPLAY=:0 xrandr -q | grep ^HDMI HDMI-1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 256mm x ...
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37 views

How can I use my Raspberry Pi 4 for a write intensive application?

Context I have just found out the hard way that SD cards have a real life attainable write limit. I use my Rasbperry Pi 4 (amongst other things) to scrape a website 24/7 with a frequency of 1 minute, ...
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Kali linux giving strange video output disruptions on pi 4

When I boot my raspberry pi 4 the screen acts strangely. The right and left borders are glitching and barely visible. Also every other line in the bootup is glitching. Hard to explain so I'll add a ...
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23 views

Error while writing bootloader to SD card

I have some problems with my RPi 4B, and one of the suggested tests is to overwrite a bootloader. I'm trying to do this on my xUbuntu 20.04 with rpi-imager, but I get the following error: Tried two ...
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Stupid Camera bugs

I've been struggling for hours reading every article that exists. Why can't a simple question get an answer? I just want to know why my new camera thats 4 hours old keeps giving me this stupid error ...
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Want to connect my old CRT TV with AV inputs to my pi4b 8gb

This is the serial number of my specific TV. Used multiple edits in config.txt TV model details: Model: CS21B500HL MODEL Code: CS21B500HLKXL TYPE NO: EU21B500 Manufacturer: Samsung Current Changes in ...
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1answer
90 views

RetroPie on Pi 4B won't display on LG smart tv

I have a Raspberry Pi 4B and have installed RetroPie on it (by flashing the image provided on the RetroPie site). In the beginning, connecting to my LG smart tv (43UM7600PLB) worked fine. After a ...
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1answer
25 views

Pi 4 not reading the QMC5883L magnetometer

I am trying to set up my magnetometer QMC5883L with my raspberry pi 4. But the pi is somehow not reading the magnetometer. I ran the command i2cdetect -y 1, but there is no detection. My connections ...
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16 views

Can't get 1080p30 / 720p60 from pi camera with OpenCV

I'm new to raspberry and raspberry pi camera. I'm using OpenCV and pi for a project; Using OpenCV and python, I want to get a high resolution video feed to process. On the official web page, it says ...
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26 views

Same display between 2 monitors on Raspberry pi 4

I want to know if its possible and what is the easiest way to setup both my monitors on a single Raspberry PI 4 to display the same view instead of a standard dual monitor setup where you can do some ...
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1answer
33 views

Raspistill takes long time to run

I am trying to get my camera run on my raspberry pi 4. I can get an image, but the raspistill command takes about 6 seconds on average to acquire one image. Is it normal? $ time raspistill -o bar.jpg ...
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Quectel L86 HAT setup with Raspberry pi 4

I am a neophyte and want to setup my gps with my raspberry pi, in order to get latitude and longitude values. But I am stuck in the very first step of setting up the gps module. Hardware ...
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36 views

Raspberry Pi 4B: cannot use 1920×1080 16:9 resolution on a Full HD monitor (CHChat Portable Monitor)

I have tried all suggestions, such as hdmi_drive=2, hdmi_group=2, hdmi_mode=82. I still don't get the correct resolution.
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19 views

Unable to detect Capacitive Soil Moisture Sensor on my RPi 4 through ADS1115

My RPi 4 does not read any values in from my capacitive soil moisture sensor. I have a breadboard for the wiring that I will attach a photo of, and I am running a test program (simpletest.py from the ...
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23 views

How to save screen configuration?

I have a RPi 4 with 2 monitors running the latest version of Rasbian. For a few months, upon startup, the monitors have been mirrored where I would like them to act as one larger combined screen. I ...
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20 views

how to troubleshoot a headless RPi4 that isn't reaching the internet (maybe isn't booting)

My pi4 has been hosting some web services at a friends house for a long time, but a few days ago it just went silent. I use Tailscale as an intranet between my different machines, and Tailscale shows ...
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1answer
26 views

Remote Desktop inactive (black) when KODI is running

I have been using a pi 3B+ with Kodi, OS Buster, KODI 18.7 for a few years. Per remote desktop I wrote scripts to control Kodi for example and tried these scripts while Kodi was running. Now I've ...
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41 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 ...
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2answers
44 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 ...
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1answer
55 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 ...
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2answers
27 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 ...
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43 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 --...
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1answer
42 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 ...
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1answer
40 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 ...
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1answer
28 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 ...
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23 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 ...
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1answer
74 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 ...
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28 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 ...
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1answer
23 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 ...
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35 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 (...
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1answer
35 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 ...
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22 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 ...
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41 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 ...
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17 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. ...
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52 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 ...

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