Newest Questions
37,665 questions
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Occasionally unexpected characters at serial port opening (Arduino Mega to Raspberry Pi via TTL-232R)
I'm using an Arduino Mega to send data via serial communication to a Raspberry Pi 5. The connection is made through a TTL-232R cable (TTL serial on the Arduino side, USB on the Raspberry Pi side). On ...
- 111
0
votes
1
answer
39
views
Cant run fuzzy logic code in raspberry pi: is GPIO incompatible with rpi5?
I wanted to run some python code which uses fuzzy logic on a Raspberry Pi 5.
Therefore I had to call the skfuzzy/scifuzzy library to do that - from there the problem seemed to occur. It seems like ...
- 1
0
votes
1
answer
21
views
LUKS unlock prompt invisible on Raspberrypi 5
I encrypted the root partition of my RPI 5 like this:
Burn the image to the SD card and perform a regular boot.
Install cryptsetup and cryptsetup-initramfs.
Make the following modifications (see e.g. ...
- 101
0
votes
0
answers
19
views
Camera Module 3 - Pi5 - getUserMedia - AutoFocus
I'm trying to have a simple JS app to open the camera and to display it on localhost a webpage.
Opening the camera and setting the resolution works fine with a simple :
navigator.mediaDevices....
- 1
2
votes
2
answers
219
views
How to log temperature data
I'm looking for a simple, low-maintenance, future-proof way to log the CPU temperature (and ideally voltage data too).
The Raspberry Pi is part of an embedded system attached to vehicles operated by ...
- 151
0
votes
0
answers
18
views
What is the DMA frame end (as referred in the official manual)
The official data sheet contains a remark that the TA bit in SPI_CS register is automatically reset on "dma_frame_end impulse" (see p 138 Table 160 SPI_CS register).
However there is no ...
- 101
0
votes
0
answers
29
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Identify USB host plugged into Pico
I have a Pico attached to a USB hub switcher. This means depending on its state the Pico is connected to either a Windows desktop, or a Macbook. I want to display this on the screen I've attached to ...
- 101
0
votes
0
answers
40
views
Busybox when booting
I am running raspberry pi 4. It still work yesterday but got into BusyBox today when I boot. I have tried the command in here and also e2fsck -c /dev/mmcblk0p2 but it only said 2 files have error and ...
- 1
0
votes
1
answer
13
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Connecting RPI 4B to Adafruit FeatherWing RFM95W 433MHz
I wanted to connect the Adafruit LORA module to my RPI 4B.
I connected it this way:
RFM9x FeatherWing
Raspberry Pi 4B (GPIO)
3.3V
3.3V
GND
GND
SCK
GPIO11 (SCLK, pin 23)
MOSI
GPIO10 (MOSI, pin 19)
MISO
...
- 1
-1
votes
1
answer
28
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Rock solid ethernet via cellular modem, but why are my wired connections so flaky?
I'm having trouble keeping alive IP connection between Pi port(s) and laptop on a hard wire. The connection freezes after 5-10 minutes while I am using putty. However, I am having completely zero ...
- 97
0
votes
1
answer
45
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Raspberry Pi 4 as router
My ISP provider is charging very high for Static IP for port forwarding. So I decided to disconnect the internet cable connected to ISP router/modem, and connect to Ethernet port of Raspberry Pi4. I ...
0
votes
0
answers
28
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Skfuzzy not installed in Raspberry Pi 5 [duplicate]
I can't install the Skfuzzy on the Raspberry Pi 5 module. It is showing me the error below given ---
error: externally-managed-environment
× This environment is externally managed
╰─> To install ...
0
votes
0
answers
31
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What should I do about the rpi-eeprom package on Raspberry models Zero, 1,2,3?
I have a few of the older RPi (models incl. "Zero", 1, 2 and 3) that do not have any EEPROM. Despite that, I notice that during apt update, the rpi-eeprom and rpi-eeprom-images packages ...
- 1
0
votes
0
answers
20
views
How to use a Pimoroni 1.3" SPI Colour Square LCD with pico & MicroPython?
I want to use the 1.3" SPI Colour Square LCD (240x240) with a pico and micropython. According to the website that is possible. However, when looking at the github page of examples there is ...
- 101
0
votes
1
answer
46
views
12V output into GPIO
I am looking to wire this inductive proximity sensor to my Raspberry PI Pico W. I plan to power the sensor with a 12V source.
However, I obviously can't use the naive way since the sensor outputs at ...
0
votes
1
answer
35
views
my raspberry pi 4 is not working
I just got it a couple of days ago and I have a 32gb SanDisk that I used for the Sofware for it. I watched multiple guides for setting them up, but the raspberry just doesn't work when I try to boot ...
-2
votes
0
answers
31
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honeygain on a raspberry pi
I have installed honeygain on a raspberry pi, following this tutorial.
And I have also had a look at this other one.
But I see no result (i.e. no revenu generated).
How can I check that all is ...
- 1
-1
votes
0
answers
8
views
Raspberry camera not detected
I have downloaded all necessary data but still it shows
Supported=1 detected=1 libcamera interface=0 help.. how do I fix this
Running libcamera-hello
Says no camera available
I don’t know how to ...
0
votes
1
answer
21
views
I can't get my reSpeaker 2-Mics Pi HAT V2.0 to work with my raspberry pi zero 2w
I followed the seeed wiki for set up and everything seems to be in working order but when I go and test if the respeaker is getting any audio input with "python3 recording_examples/...
-1
votes
0
answers
40
views
rpi2B v1.1 hardware error, not reading a good sdcard
my RPi2B v1.1 dated 2014 stopped reading SDcard and both red & green lights are constantly on.
Checked sd-card, changed to another one, same problem.
Power is good 4.99V / 3A
When powering on HDMI ...
- 9
0
votes
1
answer
31
views
How to use mpris(2) or DBUS on raspberrypi running bookworm?
I am running a raspberrypi 4B with bookworm (and whichever desktop - X11 or Wayland - that allows it to work with VNC) and writing code in Python.
I am trying to read (and maybe eventually write) to ...
- 1
0
votes
0
answers
14
views
Recalbox - problems when adding new ROMs
I am running recalbox on a Raspberry Pi5. I added some ROMs by copying them to the n64 folder via SSH, and they work fine. But if I repeat this procedure a second time to add new games, then every ...
- 101
-1
votes
0
answers
14
views
Raspicam not working vcgencmd get_camera
[all)
[pi4]
dtoverlay=vc4-fkms-v3d
# Run as fast as firmware / board allows
arm_boost= 1
[all)
gpu_mem=128
enable uart-1
dtoverlay=w1-gpio
start_x=1
I have a problem. I see that when this is my ...
1
vote
1
answer
57
views
Blowing up gpio pins.... what can I do?
I'm using a pi 4 as a thermostat for years. It's working perfectly. Until.... I decided to read the error code from the heating unit. This unit has a relay (dry contact) that pulse the error code. So ...
- 19
1
vote
0
answers
30
views
Unable to log a mouse's scroll wheel
I am building an application on raspberry pi pico.
A USB mouse is connected to the pico, and then the pico is connected to the PC.
The pico logs the mouse's button presses and mouse's movements and ...
- 107
1
vote
0
answers
22
views
Detect whether USB speaker is connected to my RPi 4B, in Python
I'm building a device that if in my Python program the USB speakers are not connected it directs sound only to the headphones but the device works differently in a different mode with not so many ...
- 11
0
votes
0
answers
27
views
How are wireless data packets processed on the Raspberry Pi?
My query is prompted by my quest to set up a firewall on my Raspberry Pi. However, in attempting to do this, I am wondering how connections are handled in general.
From reading online, it seems there ...
1
vote
0
answers
30
views
RPi SSH Accessible by hostname on Verizon but not Cox
I am able to connect to my rpi via ssh with it's hostname on Verizon networks, however, I recently switched service to Cox and on my Cox network I am unable to use the hostname w/o "hard-coding&...
- 11
0
votes
0
answers
14
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Cross-compiling OpenSSL and FFMPEG for CM3+?
I have created myself a cross-compiler (look at this thread).
OS is 64bit, compiler is targeting CM3+.
To avoid clicking I repeat here my compiler's capabilities:
-mabi= ...
- 281
0
votes
1
answer
18
views
Verifying my compiler for CM3+ with 64bit
I'm targetint a CM3+ with a 64bit OS.
Cross-compiler (and toolchain) is using these default configurations:
-mabi= lp64
-march= armv8-a
...
- 281
0
votes
2
answers
45
views
PI4J SPI - getting old data
I have a weird issue with receiving data over SPI - I'm always getting "old" data - the data from previous transmission, not the current one.
I want to communicate between Raspberry and ...
- 99
1
vote
2
answers
32
views
Raspi Camera is not detected by the raspberry pi
I would like to ask for help about my raspi camera. I have a raspi camera version 2. And I am trying to check if it is detected already using terminal by typing
cvcgencmd get camera
It shows
...
0
votes
1
answer
50
views
Raspberry Pi 5 lagging out when using bluetooth
Information:
-Raspberry pi 5, 8GB Ram
-OS: Official Raspberry pi OS (64 bit)
-Official Raspberry pi 27W PSU
-Using realvnc & IDE server(vscode) to access the pi
-Generic TWS earphones and BT ...
1
vote
4
answers
51
views
Keyboard Matrix And Pull Up Resistors
I have a question about pull-up/pull-down resistors on the Raspberry Pi Pico.
To be as brief as possible - I am trying to create my own keyboard for the learning experience and I wanted to use the ...
- 19
1
vote
0
answers
18
views
My motor encoder is rotating but on Rviz2, it didn't
I'm working on a custom LIDAR using TF Luna and rotating it using a motor with an encoder for mapping purposes.
As the title says, the rotated angle is not being updated to Rviz2 , resulting in a ...
- 11
1
vote
1
answer
26
views
Docker container not running unless I ssh into RPi
I don't think this problem has to do with Docker at all, but I'll describe the symptom first. I'm running a RPi 4 model B, with 2024-11-19-raspios-bookworm-arm64-full flashed on the SD card a few days ...
- 121
0
votes
2
answers
48
views
Detected under voltage and then my Pi4B stopped working
some minutes ago the OS detected undervoltage in my Raspberry Pi 4 B and then the Pi gone down and stopped working... i tried using voltmeter to measure the voltage of the GPIO and it is almost good (...
- 1
-2
votes
1
answer
33
views
GPIO failed with crontab on a raspberry pi zero W
I'm using a Raspberry pi zero W.
I wrote a basic demo script in python which consists in displaying a picture on an OLED screen then it waits til a button is pressed in order to replace the picture ...
- 79
0
votes
1
answer
34
views
Kernel Panic when using USB device for OS
I am trying to run Raspberry Pi OS bookworm on my Raspberry Pi 4 B 8GB from a Kingston DataTraveler Exodia 128GB (DTX/128GB) and it was working perfectly till I tried to use apt-get full-upgrade which ...
- 1
0
votes
0
answers
19
views
How can I play HLS/DASH (.m3u8 / .mpd) streams on a headless Raspberry Pi without installing VLC?
I’m building a wall‑mounted info screen using a Pi 4 running Raspberry Pi OS Lite (no desktop). I need to auto‑start a set of M3U8 and MPEG‑DASH streams (traffic cams + NASA TV) in fullscreen with ...
- 1
0
votes
1
answer
36
views
I2C PCA9685P Raspberry Pi5 in C
I have been trying to work with the Upgraded Pan Tilt Platform for Official Raspberry Pi Camera Module which uses a PCA9685P. However, the web appears only to support data sheet for the PCA9685. This ...
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-4
votes
0
answers
18
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Need Raspberry pi zero 2W, raspberry cam 5MP (with cable 15 20 pins)
For the banknote disinfector and reader project, I need a Raspberry Pi Zero 2W and a Raspberry Pi Camera 5MP. I'm from South Africa, so I'd like to find these components. Please help.
- 1
0
votes
0
answers
40
views
Raspberry Pi Camera Flask OpenCV Streaming
I am setting up a flask application on a pi zero to stream video via LAN. The camera can take normal pictures using libcamera-still command line, but when trying to stream the video the below blurry ...
1
vote
2
answers
55
views
Adding USB drive to fstab does not mount on boot, but mounts as expected from shell
I want a USB drive to always mount when booting. I am able to mount a USB drive inserted into a Pi4 using this command:
sudo mount /dev/sda1 /mnt/usb -o uid=pi,gid=pi
sudo blkid gives this:
pi@pi:/mnt/...
- 291
0
votes
0
answers
25
views
FFMPEG v4l2m2m HW transcode on Pi3B+?
I have a RPi3B+, and I wish to test transcoding capabilities (h264->h264) with ffmpeg:
ffmpeg -c:v h264_v4l2m2m -rtsp_transport tcp -i 'rtsp://admin:admin@camip:camport' -c:v h264_v4l2m2m -pix_fmt ...
- 281
0
votes
1
answer
54
views
No image output on a detected HDMI display
I have a some old F100 Neewer 7" display; "Signal input: 1080p/1080i/720p/480p/480i"
New versions have different key shapes.
I'm trying to get image output connecting it to a RPi 4B+ ...
0
votes
0
answers
13
views
lxsession run log repeated error "dhcpcd_open: No such file or directory"
Running open source video synth project on RPi 3B and the lxsession log file /home/pi/.cache/lxsession/LXDE-pi/run.log shows the same error line printed almost once a second and is getting huge. Need ...
0
votes
0
answers
14
views
Raspberry Pi cam: Could not open any dmaHeap device [duplicate]
Could not open any dmaHeap device
[0:23:15.636894785] [1879] INFO Camera camera_manager.cpp:327 libcamera v0.4.0+53-29156679
[0:23:15.669107090] [1882] ERROR DmaBufAllocator dma_buf_allocator.cpp:119 ...
0
votes
0
answers
42
views
Bluetooth LE: “Unsupported Remote Feature (0x1a)” error when connecting nRF52840 central to Raspberry Pi Zero 2W peripheral
I’m working on a BLE setup where:
A Nordic nRF52840-DK runs as the Central (it scans for devices with a specific name, then initiates a connection).
A Raspberry Pi Zero 2W (64-bit Raspberry Pi OS) ...
- 1
-1
votes
1
answer
31
views
can't boot into Desktop Environment (GUI)
hello so i was stopping services to save up ram on my raspberry pi 3b to install dlib, for that i did disable lightdm and through raspi-config i disabled splash screen and booted into console (i used ...
- 1