All Questions
35,573
questions
0
votes
0
answers
3
views
Network Sharing Fron Linux PC through ethernet
I have a Pi connected to my computer (running linux) through ethernet. I need this configuration for other purposes as the raspberry collects data from sensors and the data is sent through ethernet to ...
- 1
-1
votes
0
answers
5
views
Invisible window on 3.5" touch screen
I've connected Kedei 3.5" touch screen to raspberry pi 4, some times when running an application the window is invisible as seen in this screenshot:
another example is that the main raspberry pi ...
- 1
0
votes
0
answers
12
views
problems with bullseye libcamera
Does everybody agree that bullseye and libcamera is a complete disaster or not? It seems that there a lot of people trying to use bullseye but are having problems getting a simple camera to work
I am ...
- 1
0
votes
0
answers
6
views
JPEG decoding using gstreamer on RPI 4
I have the following pipeline:
gst-launch-1.0 v4l2src device=/dev/video0 ! 'image/jpeg, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1' ! jpegdec ! ...
- 13
0
votes
0
answers
14
views
How can I interpret this GPIO Alt-Modes?
I have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. I analysed the alt Modes ...
0
votes
0
answers
8
views
How can I modify my sampling rate using methods other than DMA?
The ADC module PmodAD1
I am currently using with 1M sampling rate and 12bit resolution
I use spidev as a library to connect to ADC
But it seems that he can only sample up to a sampling rate of 20KSPS
...
0
votes
0
answers
11
views
bluetooth network traffic monitoring
Is there anything that I can use to monitor my Bluetooth traffic just like the resource monitor in windows? I want to know the B/sec of sent and received packets of Bluetooth.
0
votes
0
answers
15
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How to use adc to receive 40khz and 43khz modulated signals?
I am currently using thePmodAD1 in this mod for signal reception
This is my code
from DesignSpark.Pmod.HAT import createPmod
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
adc =...
0
votes
1
answer
9
views
How to grab jpg from IP Camera with raspberry [closed]
I need to grab programmatically one single image (jpg) from a IP Camera in my network that stream the flow through RTSP.
The reason because I need just one single image it's explainable because I need ...
- 101
0
votes
0
answers
10
views
Disable HDMI at boot, then re-enable later
Here's the desired scenario:
System is turned on
Pi boots (bullseye) with HDMI off (fully off, not just outputting a blank stream)
Later, Pi activates HDMI and starts outputting video
Currently, I ...
0
votes
1
answer
26
views
How to interface Raspberry pi B with 433 Mhz Transceiver kit (WiringPI is defunct)?
I picked up a 433 Mhz transceiver kit so I can mess around with a remote controlled power outlet from my PI. Thing is, the two the examples I find for it use the WiringPI library which appears to be ...
- 17
1
vote
0
answers
27
views
Not getting an GPIO output
I am trying to light a led with the raspberry pi 3b, but I am failing to get an output.
I connected the LED to physical pin #11: [img]https://i.imgur.com/TYeJc10.jpg[/img]
And to physical pin #6(...
- 11
0
votes
0
answers
8
views
NFS4 mount not working on 64Bit
I have a Pi 400 with the latest 32 bit buster image, fully up to date. Mounting several NFS4 and CIFS shares from my QNAP NAS (same Network and IP range) works without any problems. Now I've put the ...
- 1
1
vote
0
answers
19
views
How to configure the watchdog
I tried to configure the watchdog on several Pi's with the latest Raspbian by adding "dtpatam=watchdog=on" to /boot/config.txt and adding a file called /etc/watchdog.conf with:
watchdog-...
- 33
0
votes
0
answers
11
views
code not detecting ads7830 even though i2cdetect shows the address
I am trying to run Motor.py code from Freenove. I can see that my ads7830 IC is up and running
i@raspberrypi:~/Freenove_Kit/Code/Python_Code/13.1.1_Motor $ i2cdetect -y 1
0 1 2 3 4 5 6 7 ...
- 149
0
votes
2
answers
18
views
How can I read the current ALT-Mode of a GPIO PIN?
i have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+
This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes.
Out of personal Interest, ...
0
votes
2
answers
24
views
Cannot SSH into periphery RPis from master RPi using cronjobs or service files: Host key verification failed
Project Overview
I have a series of RPi 3B+ which collect T/RH data using connected sensors. These "periphery" units collect data every 5 minutes, append the data to a CSV file that holds a ...
0
votes
0
answers
9
views
Connecting to mysql server with python tls
I am trying to implement TLS in mysql and everything works with in connecting to it except a python code in the raspberry pi.
the code looks like this:
import mysql.connector
import mysql.connector....
- 1
2
votes
1
answer
38
views
Raspberry Pi 3B+ board SMT component identification
i'm a college student so i cheaped out by buying a physically damaged RPi 3B+ planning to repair it myself (also as SMT soldering practice) but am having some difficulty identifying the damaged parts. ...
- 23
0
votes
0
answers
29
views
Simple UPS by directly connecting 4 NiMh accumulators to power bus? [closed]
I have a Raspberry Pi 4 Model B powered by PoE (using the official PoE hat). Unfortunately, it sometimes gets abruptly disconnected, which sometimes results in unrecoverable data corruption. So I need ...
- 101
0
votes
0
answers
21
views
I want the url of Motion WebCam Streaming Server to be changed
I'm streaming video with Raspberry Pi, webcam and Motion
One thing I want to do is change the format of the url where the streaming plays
It was originally 192.168.0.1:8081
I want to change it to 192....
- 1
0
votes
0
answers
29
views
How to get Wifi working an Raspberry PI 4 with Ubuntu Server 20.04 for ARM
Short story
PI is not connecting via Wifi. Errors of systemd-journal below:
journalctl -n
ubuntu kernel: ieee80211 phy0: brcmf_cfg80211_scan: scan error (-84)
ubuntu wpa_supplicant[573]: wlan0: CTRL-...
- 1
0
votes
2
answers
36
views
CAN bus from Raspberry Pi3+ to Arduino Nano
I am currently trying to add my RPi-3B+ to my CAN-Network. I successfully have a running CAN-Network with 10 Unos\Nanos. In the future the Pi should act as a command center and data storage. My ...
- 101
0
votes
2
answers
24
views
autostart keeps resetting
Im trying to add items to the autostart on desktop launch but the options just keep disappearing.
My file:
.config/lxsession/LXDE-pi/autostart
currently has:
@lxpanel --profile LXDE-pi
@pcmanfm --...
- 101
-1
votes
0
answers
23
views
how can i access the GUI through putty ssh
i can't find any answers on google and have resorted to here for answers
0
votes
0
answers
14
views
DSI Display not detected on reboot
Setup: Raspberry Pi 4 (8GB) running Raspberry Pi OS. 5" DSI Display and 7" HDMI Display.
From a cold-boot, the DSI display is automatically detected and works as expected.
During a reboot, ...
- 1
0
votes
1
answer
18
views
Arming an AreoStar ESC with Raspberry Pi to manage brushless motors
I am trying to set up a brushless motor so I can control it via python.
I have a AreoStar ESC and the manual says to enter the menu for the motor you must first set the throttle to 100%, then plug in ...
- 109
0
votes
0
answers
30
views
Detect motor running physcially
I'm using the pigpio library to run my motor in my Raspberry Pi like below.
ESC = 18
esc_pi = pigpio.pi()
esc_pi.set_servo_pulsewidth(ESC, 2000)
I'm wondering is there any way to detect the motor is ...
- 123
-1
votes
1
answer
33
views
GPIO detects rising edge but does not change status to 1
I am really confused: I have a lightbarrier connected over an optocoupler (ACPL-827) with my Raspberry Pi. When the lightbarrier gets triggered (detects a rising edge), it calls the scan-function. ...
- 1
0
votes
0
answers
10
views
No library found for processing.io error error when running Processing code in raspberrypi
I am trying to run a Sketch program using Processing 4.0. The code is from FreeNove raspberrypi kit.
I am getting this error
No library found for processing.io
No library found for processing.io
No ...
- 149
0
votes
1
answer
31
views
Raspberry Pi GPIO shutdown/reboot options
There are a number of Questions/Answers about safely shutting down a Pi which offer conflicting advice on shutdown and poweroff.
What are the pro/cons of these methods.
- 53.1k
0
votes
0
answers
35
views
why does raspberry pi wakes up again after shutdown command? [closed]
I have a Raspberry Pi 4 Model B. When I try to shutdown the pi (by sudo shutdown -h now command), it boots itself again while it is plugged to the power supply. Is it a normal behaviour?
- 3
0
votes
0
answers
10
views
Detected aborted journal when docker start
Recently I started working with Raspberry PI 4 and I've been facing troubles with external SDD and Docker. I connected an external SDD to Raspberry and I configured it to automatic mount drive on ...
- 101
-2
votes
1
answer
42
views
error sudo apt-get upgrade or install
I trying to run sudo apt-get upgrade. Even install i get always the below error. E: The value 'jessie' is invalid for APT::Default-Release as such a release is not available in the sources.
-1
votes
0
answers
14
views
RPi 4 Bullseye Access Point not working (wlan1 + wlan0)
I have tried many, many different approaches including numerous tutorials from all other the internet as well as RaspAP. And with none have I been able to access the internet through the AP.
My setup ...
- 1
0
votes
1
answer
25
views
NodeJS cannot read some RaspberryPi GPIOs
I want to read 5 buttons from RaspberryPi.
I installed the latest 64-bit OS bullseye on brand-new Raspberry 4B.
But somehow only GPIO23 can be read, the other GPIOs can not. When I connect GPIO23 to ...
- 153
0
votes
0
answers
14
views
How to run raspberry pi imager in old windows computer without OpenGL 2.0 or with ANGLE Open GL ES?
After installing Imager, it is failed to start showing the above error message. I have failed to find "ANGLE Open GL ES 2.0 emulation libraries" mentioned in the error message.
My spec: ...
- 1
0
votes
0
answers
34
views
How to send signals from Python to LED [closed]
I need LEDs have light level depending on numbers which will send from Python. It's about 100 float64 numbers (from 0.0 to 1.0). What I have is Raspberry Zero 2W. Also I need to send information about ...
- 1
0
votes
1
answer
28
views
How to increase timeout for apt update
I live in the boondocks, where internet connection can be...well...let's just say "not so good." While trying to keep my system (Buster) up to date, using 'apt update,' the reported ...
0
votes
0
answers
23
views
GPIO 12 failed pull up (constantly reads low) after stable use for 1-2 days
Raspberry Pi B+
I had 2 float sensors with one connected to gpio 16 and one to 12. The other wires goes to gnd; it's basically a simple switch. The pigpio gpiotest was fine initially and after 1-2 ...
- 101
0
votes
0
answers
14
views
LCD display is blank
A bit like this question, but different... I bought this display and the MIPI to HDMI board. It all connects fine, but I get nothing on the display. The board is getting power (green led), but I don't ...
- 1
0
votes
0
answers
10
views
list open files on mass storage gadget
I have a Pi Zero configured as a mass storage gadget (MSG). I want to attach a display that will list which, if any, files are being accessed externally via the MSG. For example, I have mp3 files ...
0
votes
0
answers
16
views
Sending a stream of images from RPI pi camera to my PC for image recognition (yolov5)
I am using a RPI Pi camera for my image recognition project. For my project, I need to send a stream of images of a library from RPI pi camera to a PC, and perform image recognition on the PC to ...
0
votes
0
answers
29
views
Script only works after opening browser and closing it
I have a script to open 2 webpages one on each monitor. The end of the script selects one of the pages and enters in login credentials. The script works great and I have it working with systemctl to ...
- 1
0
votes
0
answers
24
views
Hardware-encoding (h264_v4l2m2m) a MJPEG stream from a webcam
I have a 1080p webcam connected to a Raspberry Pi 4B over USB. The camera supports the following formats:
Raw : yuyv422 : YUYV 4:2:2
Compressed: mjpeg : Motion-JPEG
...
- 101
0
votes
0
answers
27
views
Cannot change permission of a mounted external HDD due to rpi-first-boot-wizard user [closed]
I mounted an external hdd sudo mount into /mnt/edisk on my raspberry pi. If I check ownership, strangely I see this:
drwxr-xr-x 19 rpi-first-boot-wizard rpi-first-boot-wizard 128K May 10 17:44 edisk
I ...
0
votes
0
answers
13
views
How to receive the CAN messages from the ECU via mcp2515 Transceiver connected to Rasberrypi?
MCP2515 connected to Rasberrypi, CANH and CANL Of ECU connected to Mcp2515 transreceiver.
using candump can0, I am not able to receive the CAN messages.
Can anyone suggest what should be done.
Thank ...
0
votes
1
answer
35
views
How to run libcamera-still in python trough crontab?
I'm trying to make a time lapse using crontab to manage time intervals. The camera I use is an arducam Autofocus imx519. The libcamera-still command works normally when run via terminal. But when I ...
0
votes
3
answers
31
views
RPi pin state on startup not default
I have 2 Raspberry Pis a model 3B+ and a model 2. Both are loaded with identical software (I cloned the SD card using the raspberry SD card copier). They are running PRETTY_NAME="Raspbian GNU/...
- 1
0
votes
0
answers
9
views
Prevent sending inputs to the terminal when running an SDL app
Hello I am running a desktop less environment.
I start a SDL OpenGL3 ES 2 app from a service.
It shows the GUI and it receive inputs from my keyboard however these inputs are also sent to the terminal ...
- 101