All Questions
37,956
questions
1
vote
1
answer
944
views
How to route all traffic to captive portal on Pi Zero?
What I'm trying to achieve is that I can manually switch between my Pi having internet access over WLAN or letting it function as an Access Point. When the Access Point is active, the Pi has no ...
- 111
0
votes
0
answers
150
views
raspberrypi time changes and then it hangs without any reason, can someone help. A beginner here
Syslog data that I see , notice that time jumps back after this strange line is logged ^@^@^@^@^@. once this happens, raspberry Pi Zero W becomes non- responsive and I have to restart to connect back ...
- 101
1
vote
1
answer
721
views
Run script on startup not working
So I'm pretty new to the pi. I'm trying to run chromium in kiosk mode on boot and point it to a local page. I've tried many tutorials online and they're all for versions of the pi that are older than ...
- 113
1
vote
0
answers
71
views
Arducam blocking i2c
Ive been trying the get the Arducam 16MP IMX298 Color MIPI Camera Module to work with some I2C controlled LEDS.
Im able to detect the LEDS and controll them perfectly. i2cdetect -y 1 shows 4 ...
0
votes
0
answers
237
views
Raspberry pi 4 Hostname always changing
I have a raspberry pi 4 with raspbian buster installed. I set the hostname using raspi-config to "myrpi". I can connect to it using ssh and it works fine. But after a few hours or so, the hostname ...
- 101
1
vote
1
answer
3k
views
Docker error "exec format error" in reverse proxy of nginx
Short Version
I am trying to rebuild the reverse proxy of jwilder/nginx-proxy:alpine on my Raspberry Pi 4 running Raspbian 10.
As the container is not configured for armhf architectures, I tweaked ...
- 233
0
votes
0
answers
114
views
I'm new to this...upgrading a Arcade1up Rampage machine to Raspberry Pi
You guys will probably laugh at me for asking dumb questions...but...here's my issue. Any help would be forever appreciated!
I followed the instructions perfectly from a YouTube video by ETA prime....
- 1
4
votes
3
answers
1k
views
How an I improve sshd latency over WiFi?
I am using my pi4 as a portable dev server which I ssh into from a Chromebook over my home WiFi network.
What I'm seeing is that the character latency is very high, seriously impacting my developer ...
- 69
0
votes
1
answer
611
views
Azure IoT Hub/Services with Raspberry pi in python
I have been googling how to connect raspberry pi 4(with and without buster) to Azure IoT using the python SDK and found somethings but they are not clear as they should be for a beginner like me who ...
- 195
0
votes
1
answer
107
views
Turn On/Off 3D printer projector with Python/GPIO
There are similar questions but I don't want to turn on the LED but the 3D printer projector(NQM Plus Light engine) for the image projection.
The pins that I wanted to use are shown in the picture.
...
- 28
0
votes
2
answers
366
views
Is it possible to connect 2 mouses on a raspberry pi
I want to connect 2 USB mouses on the same raspberry pi.
I want to see 2 cursors (blue and red) on the screen.
Is it possible ?
Thanks
- 109
1
vote
2
answers
523
views
Rpi zero w serial code python
So i set up my rpi zero w to comunicate at 11500 serial with an arduino... the arduino sends over serial lines such as "~1 11443". My idea is that the ~ character tells the pi when to look for data, ...
- 21
0
votes
1
answer
510
views
Raspberry pi 3 Model B+ : ACT light not blinking
While i am working on pc my raspberry pi working correctly , but suddenly it's display gone. And rebooting it again it not blink ACT light at least 1 time. Means it not blink any time. Also , i have ...
2
votes
2
answers
2k
views
Connecting multiple wires to a single GROUND pin?
I'm working on a project for my Intro to Computers class, and I need to light up several LED lights in a row with my Raspberry Pi (Model 4)(Using a breadboard). I'm sorry to say, but I am a beginner (...
- 21
-2
votes
3
answers
464
views
Autostart program not working
I want to start qjackctl and a vlc media player playlist file at boot.
I’ve searched over the internet but all the options aren’t working.
I've added @ qjackctl at /etc/rc.local file, this file ...
- 9
0
votes
0
answers
34
views
Pi does not find NOOBS files
My Raspberry Pi is not finding the NOOBS files. I have tried to make the SD card bootable, but it did not get me as far as if I just unzipped NOOBS on to the Sd card. The screen is blank. Any ...
- 13
1
vote
0
answers
901
views
Using USB-C on Pi 4 while powering the Pi via GPIO header pins?
I have an Pi 4 that I have setup as a router. I am using USB-C in Ethernet gadget mode to connect to my computer. I want to be able to disconnect and reconnect the Pi from my computer without it ...
- 111
0
votes
0
answers
46
views
Can only connect to Google and package repositories
I just did a brand new installation of Raspbian on a Pi3 and have a bit of a weird network issue.
I was able to update the system without issue. But, when I open Chromium, I can only reach Google ...
- 101
0
votes
1
answer
165
views
How to wire a button
O have tried to do this so many times, so many websites, so many books, and it just won't work. I do not know how to wire it so that the LED lights up when I press the button. I'm pretty sure that I ...
3
votes
1
answer
1k
views
PXE Boot Raspberry PI Not working
I've been trying to get network booting working on the Pi, i'm using a 3B+ so this should work. The Pi is in it's own VLAN with DHCP running from a QNAP NAS in a seperate VLAN, the NAS is also running ...
- 81
1
vote
1
answer
463
views
Copy / Back up all images on Android phone to SD Card with folders
I am running a Raspberry Pi 4 Model B as a VPN Gateway with OpenVPN. On my Samsung S8, I have the app OpenVPN for Android installed and the VPN tunnel to my home network works like a charm.
What I ...
- 131
4
votes
1
answer
11k
views
Permission denied to access `/media/pi` folder
I connected a HDD to USB port, then Raspbian allow me to mount the unit.
So I can access to logical drive with this path: /media/pi/PICTURES-HDD.
Then I installed a DLNA server (serviio) to view the ...
- 143
0
votes
1
answer
504
views
Problem running the serial module with Python
I am trying to use the serial port on the Raspberry but when I run the example below I have the message:
TypeError: 'module' object is not callable
import time
import serial
ser = serial.serial(
...
0
votes
2
answers
144
views
Can't login over ssh - IO error?
I'm trying to log into a Raspberry Pi which is on my network over SSH, but when I enter the correct password, it responds with
-bash: /etc/bash.bashrc: Inddata/uddata-fejl
-bash: /home/pi/.bashrc: ...
- 101
0
votes
0
answers
29
views
Raspberry pi wireless WiFi
So I had an idea and wanted to know if it was possible and how to tackle it. So I was thinking if I had a raspberry pi plugged into my router at home via Ethernet cable, could I create some sort of ...
0
votes
1
answer
204
views
How to restart ssh and Samba after a temporary network disconnection?
I have a Raspberry Pi (Raspbian GNU/Linux 10 (buster)) connected to my home WiFi, which I primarily use as a Samba file server to access files on my other devices.
I occasionally have to reboot my ...
- 101
0
votes
0
answers
95
views
Spotify does not work with google assistant - PI 3
I followed these instructions thoroughly on my raspberry pi 3 and whenever I say "Ok google, play spotify" the AI says "Something went wrong". I cannot figure out what went wrong in the process? Has ...
- 33
1
vote
1
answer
1k
views
Flask app takes 60% CPU on Raspberry Pi Zero W
I am developing Flask rover app on Raspberry Pi Zero W. And I having problems with CPU perfomance. I used flask profiller to find weak spot in my app, but everything seemed normal. I have Raspberry ...
- 13
0
votes
0
answers
2k
views
Error when creating Python GUI using Tkinter: “no display name and no $DISPLAY environment variable”
last few days I've been working to create a GUI using Tkinter
This morning my code still worked, but now it crashed with said error:
Traceback (most recent call last):
File "TKtest.py", line 3, in &...
0
votes
1
answer
2k
views
Raspberry Pi 4 Ubuntu Server 19 connect to hidden WiFi
I'm trying to connect to a hidden access point using a Raspberry Pi 4B running Ubuntu Server 19.10.
I cannot seem to get it to work. What could be the problem here? Below the output of some of the ...
- 101
0
votes
1
answer
487
views
Using expect for authentication
I have installed the Nordvpn linux app
After using it for some days I have realised I need to login again sometimes.
Login is done by the command and the response is:
root@root:~ $ nordvpn login
...
- 43
3
votes
1
answer
3k
views
measuring the cpu temp and gpu temp in bash and python 3.5.3+ pi 2, 3B, 3B+, 4B, Buster
Two part question.
Although these questions might sound more generally like linux questions, my need is to have these answers specific to the pi.
Part 1 - Does the raspberry pi 2, 3B, 3B+, 4B, have ...
- 339
0
votes
1
answer
252
views
Root directory using all space?
I'm not sure why but I have no space available on the SDCard, I'm using a light version of Rasbian without any UI, and I have two file downloading on transmission (docker) which is suppose to be on ...
- 237
15
votes
2
answers
14k
views
Use MacBook charger for Raspberry Pi 4
I am using the official 15.3W USB-C Power Supply to power up my Raspberry Pi 4.
I got my self a second Raspberry Pi 4 but I haven't bought the power supply yet.
Would I be able to use the Macbook ...
- 373
2
votes
1
answer
3k
views
Explanation of /proc/interrupts output
I couldn't find any answer about this by googling.
Here my output of /proc/interrupts:
pi@raspberrypi:~ $ cat /proc/interrupts
CPU0
17: 3380 ARMCTRL-level 1 Edge ...
- 123
2
votes
0
answers
847
views
Freecad not working on my raspbian!
I just installed free cad on raspbian from repo . Then after the installation was complete when I preseed the freecad icon from menu it is opening. But when I am pressing new project the software is ...
- 1,828
3
votes
1
answer
3k
views
Persistently increase usbfs_memory_mb on RPI4 running Ubuntu 19
I am working with a 4gb RaspberryPI4 and it's running a USB3 Flir Blackfly. Out of the box, the setting of usbcore.usbfs_memory_mb @ 16 isn't enough to get a stream from the camera. Increasing the ...
-2
votes
1
answer
100
views
Bootable USB or Pendrive are not detected in Raspberry pi 3B+ for data transfer or format
I want to copy a file raspberry pi 3B+ to my Desktop machine. I had plugged the USB pen-drive in raspberry pi 3B+. But pen-drive is not recognized. Did I missed anything as in case of pi?
Thanks in ...
- 173
2
votes
2
answers
3k
views
How to disable specific Mirror repository?
I'm trying to install updates. But apt always using ftp.harukasan.org. This mirror is too slow. I need to change. I checked /etc/apt/sources.list, /etc/apt/sources.list.d/ there is no configuration is ...
- 123
1
vote
0
answers
363
views
Communication between computer with Labview and Raspberry Pi
I would like to use a computer with Labview to send commands to a Raspberry Pi, for the moment I am just trying to get a LED to blink.
What would be the best way to proceed ?
I have thought of two ...
1
vote
0
answers
111
views
Raspberry Pi3 B+ Windows IoT does not boot
I am using Raspberry Pi3 Model B+ embedded card and I am trying to flash Windows IoT core.
I had some issues with it while it does not boot.
I followed the steps described here and used RaspberryPi ...
- 111
0
votes
1
answer
1k
views
switching between network interfaces when main interface is down
I'm using Raspberry Pi 3B. I've ethernet eth0 and a 4G module ppp0 connected. Priority connection is eth0. I can detect whether ethernet cable is connected to the raspberry pi or not using commands. ...
- 267
5
votes
3
answers
1k
views
RF 433 MHz cannot transmit or receive from more than 10-30 cm
I have 3 Pi's and a transmitter and receiver on all of them. We are trying to just send a number from Pi 1 to Pi 2 and have Pi 2 send back a response. We followed the instructions in https://www....
2
votes
0
answers
382
views
Make error / Enable monitor mode in Raspberry Pi 3B with Nexmon
I would like to add monitor mode for my raspberry pi 3B (Not B+) by using Nexmon.
I am trying the part of [Build patches for bcm43430a1 on the RPI3/Zero W or bcm434355c0 on the RPI3+/RPI4 using ...
- 21
1
vote
1
answer
107
views
Network automatic reset on boot on raspberry pi 4
I have 2 Raspberries. First, one 3B, which, I used for a while, everything works well. Now when I'm started using the 4B also, I encountered an issue. My 4B, doesn't resolve nameservers.
Example:
...
- 11
1
vote
0
answers
102
views
UPS for Pi 3B and hdd
I'm quite new to the Pi world, but I need a UPS unit to power both a Raspberry Pi 3B and a 2.5'' hard disk used by the Pi.
I thought a power bank could be the right choice for me, but I cannot find a ...
- 111
0
votes
1
answer
446
views
Number of SPI devices limited just by CS pins? And pin assignment flexibility question
I've done some research, but not probably not enough, as I'm still confused some.
First of all, I've got a Pi rev 1 Model B (with the 26 pin connector) and two devices: The Waveshare AD/DA board and ...
- 1
0
votes
1
answer
181
views
How do I set up a remote ssh connection from my raspberry pi?
I really need some clarification regarding how you connect to a remote server which then forwards requests to certain ports. In an ssh tunnel, are you establishing a SOCKS proxy? How do I get a server ...
2
votes
1
answer
70
views
Is Raspberry Pi a good system for a middle schooler to learn to code?
I have no experience with the Raspberry Pi system, but I have heard a lot of good things about it. My son is interested in learning to code (any kind of coding at this point), and I am wondering if ...
- 123
3
votes
1
answer
277
views
Oh no! GPIO again!
I'm working at this source: https://github.com/ozw1z5rd/ninepin/blob/master/iec/iec.c
int iec_init(void)
{
int result;
int minor;
if ( request_mem_region(GPIO_BASE, 4096, LABEL_DEVICE) == NULL ...
- 141