All Questions

0
votes
0answers
11 views

dhclient doesent renew lease after wifi drop - wpa_supplicant

i have set up /etc/network/interfaces because i need some static adresses on single interface. This causes to use dhclient instead of dhcpcd wich works fine. Now i have the problem that when i boot ...
1
vote
1answer
23 views

Software control backlight of a 3.5 inch display

I'm using a 3.5 inch SPI screen on a Raspberry PI3. I would like to know how is it possible to control the backlight value with a shell command. I try to use the command echo %s > /sys/class/...
0
votes
0answers
13 views

RPi camera OCR,and save output in variable (pyhton with tesseract)

I want to make a python code for the raspberry pi, with the tesseract OCR engine, that it keeps reading text from the camera in realtime, saves in a variable, and sends output to Arduino. Is there a ...
0
votes
0answers
20 views

Waveshare ADC Board Full Scale Issues (ADS1256)

I am using the Waveshare High-Precision AD/DA Board with my Pi to read an analogue 0-5v signal. I am using a 5V reference voltage, but I can't seem to read full scale. Applying 0V reads out -344 ...
0
votes
0answers
23 views

POE power for BOTH Pi and Hard Drives?

I have a need for some network-accessable storage for backups, in a location where there is only POE power. There is no mains AC electricity available. Ideally I'd like 2TB of space so an SSD is ...
-3
votes
0answers
45 views

Can you get Ubuntu to work on the Pi 3 B+? [on hold]

I have got Ubuntu on my Pi3 B+ but it does not work, I have version 16.04 and I made sure I did everything correct, I even ran thru the process 3 times, my 3B+ is new and had no problems with raspbian....
1
vote
1answer
45 views

How can I diagnose a headless Raspberry Pi Zero W that hangs?

I'm trying to run my Pi Zero W as a motion detecting camera using RPI cam web interface but it keeps hanging after a few hours at most. Before it hangs, it can record motion detect videos and upload ...
0
votes
0answers
28 views

Accidentally clicked on “Expulse SD card” on RPI3

I accidentally clicked on "Expulse SD card" on RPI3 now I don´t have any image I can access Terminal with an SSH but if I try to connect it to my TV with an HDMI or with a remote desktop I don´t get ...
0
votes
0answers
80 views

Creating router without using ethernet

I would like to make router from my Raspberry Pi 3B+ using built-in wifi. After installing the OS, I made update, upgrade and installed packages: sudo apt update -y && sudo apt upgrade -y &...
1
vote
1answer
49 views

Translation request for News re wpasupplicant during upgrade

During a routine upgrade (sudo apt-get upgrade), the following "news" appeared in my terminal window: apt-listchanges: News --------------------- wpasupplicant (2:2.6-19) unstable; urgency=medium ...
0
votes
0answers
24 views

2 USB Sound Cards in Raspberry Pi

I have a pair of Alesis Active Monitors which have a USB input and it's a pain connecting devices to it so I felt using a Rasberry Pi with bluetooth and audio ins to allow for multiple connections ...
0
votes
0answers
22 views

Cups doesn't work on Pi3B+ with Brother DCP-7030

I'm running the latest version of CUPS pn my raspberry pi 3B+. I have my Brother DCP-7030 printer connected via usb. I configured everything according to this tutorial. I have the web interface ...
1
vote
2answers
27 views

Adduser command missing

I use rkhunter on all of my RPis, since some are used as dedicated servers, to try and ensure no rootkits or other malware are installed on them. When I did the check as usual today, I got the ...
0
votes
0answers
19 views

Video streaming from Raspberry PI - Python vs. raspivid + netcat

Some time ago I posted the following post on Stack Overflow, but I got no reply. I can't figure out where the additional lag with the Python method comes from. The netcat method is really smooth with ...
1
vote
3answers
58 views

Errors compiling C program with time.h library

I am facing some problems in my raspberry Pi 3 B+ when I compile this simple program that uses time library: #include <stdio.h> #include <time.h> int main(int argc, char** argv) { ...
-3
votes
0answers
16 views

phython program to display the data received over raspberry pi over monitor [on hold]

I'm working on project, I want to display the input data which is image, text msg, video. Input data is send using an Android app over IP address of raspberry pi3. I want a program for data receiving ...
0
votes
0answers
14 views

Undefined TERM on freshly installed Raspbian Stretch

I have a weird problem. Just finished a fresh install of 2018-11-13-raspbian-stretch.img (Raspbian Stretch with desktop) on Raspberry Pi 2 Model B V1.1 Did the pre-configuration, passed through ...
0
votes
1answer
49 views

GPIO only reaches 2,4v when high

TLDR; Under little load the GPIO 22 reaches 3,5v whereas under more load it only reaches ~2,4V, which is not enough to trigger the reset-line on an ATMEGA328P. UART GPIO Pins still reach 3,3V in both ...
-1
votes
0answers
22 views

Python Error code (TypeError: __init__() got an unexpected keyword argument 'vf')

Here is the full code can you please fix the error for me # USAGE # python detect_faces_video.py --prototxt deploy.prototxt.txt --model res10_300x300_ssd_iter_140000.caffemodel # import the ...
0
votes
1answer
29 views

How to loop mount an iso in raspberry pi?

I'm trying to do: sudo mount -o loop ubuntu-18.10-live-server-amd64.iso /mnt/ubuntu and getting: unknown filesystem type 'iso9660' Doing a: uname -a on my pi reveals: Linux pi 4.14.79+ #1159 Sun ...
0
votes
0answers
17 views

How to stream m3u8 link on raspberry pi?

I have raspberry pi 3 and tried to play m3u8 link using omxplayer directly but that didn't work. pi@raspberrypi:~ $ omxplayer 'http://somesitename/tv/m3u8.php?channel=Discovery_HD&quality=900' ...
0
votes
1answer
17 views

Connection via Ethernet to Windows

I'm having an issue with creating a direct connection with RPi 3 B+ and Windows laptop (to use as interface with RPi for first time set-up). I formatted the microSD card to FAT32 (Master Boot Record) ...
0
votes
0answers
21 views

Emulate USB devices from one Pi zero to another Pi zero

I'm looking for the best way to emulate USB devices that are plugged into a Pi zero and connected to another Pi zero through GPIO pins, so the second Pi zero will emulate the actual device that is ...
0
votes
0answers
12 views

hcitool does not find devices despite GUI showing multiple

I'm trying to better understand C (and bluetooth) using a Raspberry Pi 3 b+ as the testing grounds. I started by writing a C program that uses BlueZ to scan for bluetooth devices (script pretty common ...
0
votes
1answer
41 views

Pi 3b+, integrated wifi loses connection on 5ghz network with carrier lost

I hope your all doing well. Before some weeks i did buy my first raspi, and I'm quite happy with it. As my starter Project, i wanted to create an Accespoint out of it, and after some days reading ...
0
votes
1answer
28 views

problem when running the python application in /etc/rc.local in console mode

I'm coding an application to run when starting raspberry, however when trying to run this error is returned: QXcbConnection: Could not connect to display My application is done in python with qt ...
0
votes
1answer
30 views

Use Python flask or NodeJS for controlling stepper motors via Web?

Im planing a project where I need to controll some stepper motors with my RaspberryPI. I'd like to controll those motors interactively via a web GUI. This server should run on my Py. Now I found a ...
0
votes
1answer
62 views

How to connect a SATA disk through GPIO (not USB)

I repost this here because i was told on stackoverflow that my question was off-topic. I would like to connect a lot of SATA hdd on my raspberry PI. I've read about how are sata pins made and I can ...
0
votes
0answers
13 views

installed Vokoscreen

I installed vokoscreen to record my Pi desktop and I was wondering if there is any better way to record it, I like it and all, but my screen gliches, is there anything I can do to make it work faster ...
0
votes
0answers
12 views

Is overclock a good thing to set to full, my sources say there is a risk of card damage

I love making things work on the Pi, I have a lot of things that involve overclock on full, VLCplayer, minetest, and some other apps. But i have heard there is a risk to what I am doing, can someone ...
0
votes
0answers
18 views

Motor-Potientiometer read and write, additional power source

I want to get and set values for a motor potentioneter ALPS RK16812MG from a raspberry pi. I found a similar approach here however, the answers in that forum suggest a different wiring with an ...
1
vote
2answers
88 views

5V-3.3V Sensors Confusion

Most of the sensors available in the market requires 3.3V-5V. The GPIO of the Raspberry Pi is 3.3V max only and not 5V tolerant. I have seen tutorials around the internet that they supply the sensors ...
0
votes
1answer
20 views

Dependencies problem installing mmrcn

Hello i am trying to use ML techniques to identify cars in an image using opencv. I have been following this tutorial : https://medium.com/@ageitgey/snagging-parking-spaces-with-mask-r-cnn-and-python-...
1
vote
1answer
23 views

Why doesn't dist-upgrade upgrade to stretch?

I have an old Model B+ (I found out by checking this page – my hardware revision code is 0010), which I'm trying to upgrade to the latest Raspbian. I take it from the answers to this question that it ...
0
votes
1answer
46 views

How to get Raspberry Pi 3 & Android device to communicate with each other, and authenticate?

In an Android app that we created for a project (a step-counter fitness tracker), we require user authentication to access the user's data in Firebase. Same goes for the Python program in the ...
0
votes
0answers
18 views

Raspberrypi 3b+ interface with Voice recognition module V3.1

I have write program for Voice recognition Module V3.1 and Raspberrypi 3b+ , but my problem is I am not able to write any of my voice command on voice module when I speech my command its not return ...
1
vote
0answers
16 views

Long term screw terminal power

Okay so I have a PCA9685 hooked up to a raspberry pi 3 so that it can control multiple servos via a c++ program. Currently, I have them hooked up to a battery pack that has red and black wires as gnd ...
0
votes
1answer
82 views

How to remove `raspi-copies-and-fills` from Raspbian

I did apt update && apt upgrade as root and now my Raspbian system is corrupt and won't boot anymore. After some debugging I noticed there's the package raspi-copies-and-fills. Fortunately, ...
0
votes
0answers
15 views

only PWR led is on but ACT led is not

I got a Raspberry Pi 3 Model A+. I immediately inserted an sd card and booted it up it went well for one day and then after an update, I could not reboot it up so then I formatted the sd card and ...
0
votes
1answer
35 views

Raspivid: 'ES_OUT_SET_(GROUP_)PCR is called too late' & stream keeps freezing

First post here, hopefully i'm in the right place :) I'm attempting to stream low-latency video from my Raspberry Pi to my Windows PC using Raspivid and VLC. I'm no expert on this stuff and i'm ...
1
vote
1answer
40 views

Can I connect 4 RasPi with a windows PC only using ethernet cables (no WiFi or internet connection)?

I want to connect 4 RasPi to one windows PC using ethernet cables. The plan is to have each RasPi equipped with a camera. I will have the cameras start recording upon the press of a button, then a ...
0
votes
2answers
37 views

hostapd doesent work anymore

I was running hostapd and it worked fine but i had to reinstall the os and copied the config but now it gives me some problems. First of all hostapd was masked, then i unmasked it and tried to start ...
-2
votes
1answer
46 views

Iot hub and rasberry pi [closed]

im makeing project but new in codeing , i want to connect cctv camera and ultra sonic sensor so if someone disobey the rule the camera will capture a photo and send it to online database and from the ...
1
vote
2answers
35 views

@reboot with crontab, what am I doing wrong?

I have an .sh file located at '/home/pi/startup.sh' which I want to have running soon after bootup. I have my crontab with the following information. # m h dom mon dow user        command 17 *        ...
0
votes
0answers
23 views

Are there any decent video editors for the RasPi 3?

I've been making YT videos about the Raspberry Pi but have had no way to edit them on the pi. Are there any nice Raspberry Pi-compatible video editing apps?
1
vote
1answer
40 views

Why is /boot/config.txt executable?

FYI, I installed the R-PI minimal image with dd myself onto an sd card I was messing with the boot config when I realized that this file was set as executable. Looking at the config, I don't see why ...
1
vote
1answer
39 views

Autoconnect headless Pi to Wifi

I want my Pi B+ running Raspbian to auto connect to Wifi and startup SSH, but I'm doing something wrong. I created file named ssh in /boot/, and configured interfaces and wpa_supplicant as in guides ...
-1
votes
0answers
20 views

Printer Using Raspberry Pi and Arduino

Well I'am creating a printer that works with raspberry pi as processor and Arduino as the microcontroller. The raspberry pi will be connected to a linux/windows system that sends file to pi. Also USB ...
0
votes
1answer
64 views

Raspberry SSH works on Linux but access denied on Windows 10

I can login with ssh my_username@192.168.0.5 when I use Ubuntu 16.04. However using Windows 10, it says PuTTY: Network error: Permission denied. Windows Power Shell: > ssh my_username@192....
0
votes
0answers
17 views

Problems with music sensitive LED strip project

We want to install a music-sensitive light system using four or five LED-strips. We have several ideas but no experience with this topic. Following plan: You connect your phone with the Raspberry ...

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