All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
5 views

Pin Getting HIGH and LOW in mid of excecution

I have a function in which i am capturing two GPIO pin status i.e. BtnPin and normalBtn,when i press the Normal Button the below written function will get called and based on condtions it will give me ...
0
votes
0answers
6 views

How to access Raspberry Pi webapp on remote devices, with RasPi as accesspoint

I'm working on a remote car to use outdoors. I'm controlling motors with relays using a flask webapp running at localhost. I can access the webapp when raspi is on my home network, by loading it's ip:...
0
votes
0answers
3 views

How to get and set the byte in EEPROM - Waveshare AT24/FM24 using i2cget and i2cset command?

I am following the tutorial https://www.waveshare.com/wiki/Raspberry_Pi_Tutorial_Series:_I2C I see that there are four address here. root@raspberrypi:/home/pi# i2cdetect -y 1 0 1 2 3 4 5 ...
0
votes
0answers
8 views

Python date and time in local time zone and UTC are equal

I have a Python script that I need to be executed on a Raspberry Device. In the script, I am trying to get the date time now in local time zone and UTC as below. server_now = datetime.datetime.now() ...
0
votes
1answer
18 views

Getting Ip address 169.254.xx.xx

My question is not the same as other question like this. In the following i will describe why. When I tried to connect raspberry (3 b+) to laptop, via Puttty (laptop's OS is Windows 10), I could not ...
1
vote
1answer
11 views

Need help with running terminal commands on startup

I made my Zero into a radio transmitter and I am trying to make it transmit on startup, I am not quite sure how to do it, I've looked around different forums but I can't really find anything. I would ...
1
vote
0answers
15 views

Configure Rpi as router - error when starting network and DHCP interfaces

I looked at several solutions for this question, but none of them worked. My aim is to use the RPi as a router with an existing wireless router connected as an access point. The following figure ...
-1
votes
0answers
5 views

Pi 3 w/Pisound - Won't turn on unless wait a few minutes

I have a Pi 3 and Pisound (hat) and to turn it off I just unplug the cable. Now oddly, if I plug it back in right away I just get a red light, no blinking yellow BUT If I wait a few minutes to plug it ...
0
votes
0answers
13 views

Best way to power multiple Raspberry Pi 4s?

I ordered a few Raspberry Pi 4s, still under way, each with their own power supply, and I plan to get more, but when I have been previously able to power RPis with USB-hub, there's apparently no USB-C-...
0
votes
1answer
13 views

Automate Configuration of Pi Access Point

Are there any opensource scripts/repos that automate configuring a Raspberry Pi into a Wireless Access Point?
2
votes
1answer
12 views

Is there a way to slow down servo movement speed?

Despite searching I was not able to find an answer to this question. I have a servo attached to a pin that moves an arm back and forth. The problem is that it moves too quickly. Is there a way ...
0
votes
1answer
15 views

Is it possible to run Roblox on Raspberry Pi 4?

I need to know how to download roblox and roblox studio to play and make my own game how do I do that?
0
votes
0answers
7 views

Installing interactive brokers IB gateway on raspy 3B+

I found some posts that walk you through the installation but they are very old and don’t work anymore. I tried to install the oracle java for Arm Linux and then modify the IB installation script to ...
0
votes
0answers
5 views

How to prevent VNC Viewer window to headless RPi4 from automatically closing after a while?

I'm running an RPi4 headless and connecting over WiFi using VNC Viewer. At some point after opening the viewer window (maybe an hour or two later) that viewer window seems to automatically close. ...
0
votes
1answer
13 views

Raspberry Pi 4 autostart Chromium?

I've tried trawling through the RPI community threads for suggestions to start Chromium through a shell script. I originally tried to do this with Crontab however because the cron user doesn't have ...
0
votes
0answers
8 views

Installing Raspbian to an SD card connected to a smartphone

I have no idea why it doesn't work, but my PC doesn't detect SD cards, neither does my laptop. My phone detects the same MicroSD card, if I take the standard SD adapter off and plug it into my phone. ...
0
votes
0answers
30 views

How to make a program run on boot in the RPi kernel

I'm currently working on a fork on the raspi kernel for streaming cable channels (I have that ready. That's not what I need help with). What I need to know is how to get a program to run on boot (This ...
0
votes
1answer
47 views

How do I connect Raspberry PI SPI pins to LED Segment via SPI?

The led segment (SPI Slave) I have got has the pin names - VCC, GND, DN, CS, CLK. The raspberry pi model is 3 model B version 1.2. The segment model is XC-3714. Is my understanding correct here that ...
0
votes
0answers
8 views

Unpredictable timing with ioctl - mailboxes and double buffering

To flip the frame buffer, I am updating the mailbox virtual offset with a function like this: int flip_buffer(int buffer_num, fb_config fb0){ int fd = open("/dev/vcio",0); if(fd == -1){ ...
1
vote
1answer
40 views

Two dhcpcd services: systemd and init.d

I see that there is a systemd service called dhcpcd5 and an init.d script called dhcpcd. Why both ways? What are the differences and how to choose which run?
0
votes
1answer
25 views

Login service fails to start

On my Raspbian Buster Lite (slightly customized) at boot I notice the Login Service fails to start several times: [FAILED] Failed to start Login Service. See 'systemctl status systemd-logind.service' ...
4
votes
1answer
39 views

Run Raspbian in RAM

Since the first version of Raspberry Pi, I use a customized version of Raspbian in order to mount the rootfs in read-only. Basically I created symlinks in RAM for /var directories so applications don'...
8
votes
1answer
1k views

Control GPIO pins from C

Most of the libraries, in multiple languages, interact with the GPIO pins via /sys/class/gpio/export, /sys/class/gpio/import, /sys/class/gpio/gpio10/value, etc. However the linux kernel docs clearly ...
0
votes
0answers
14 views

Logwatch problem

I'm trying to send logs to my email. I'm doing this via SSH. I edited the file: /usr/share/logwatch/default.conf/logwatch.conf and edited these lines: Output = mail Format = html Encode = none ...
0
votes
0answers
15 views

How to build gst-omx on raspberry pi 3b+?

I am trying to build gst-omx and I keep getting errors, specifically: No package 'brcmegl' found Here is my script: #!/bin/bash export MAKEFLAGS="-j 4" set -e BRANCH="1.16" [ -n "$1" ] && ...
1
vote
0answers
12 views

I don't know why suddenly mjpg-streamer and webcam stop working

I have made a program that uses three webcams and three ultrasonic sensors using raspberry pi 3 and python 3. When each ultrasonic sensors detect stuff in front of them, webcam take a picture of it. ...
0
votes
1answer
18 views

I am unable to upgrade Raspbian on my Raspberry Pi 3 B+

I got my Pi in Fall, 2018, and have not had trouble running it. However, when I tried to upgrade my Raspbian back in May, 2019, and it didn’t look like I succeeded because when I issued the command “...
-1
votes
0answers
6 views

Retropie Edit Controller Config On MicroSD

I'm trying to manually edit the config files for the Player 1 & 2 inputs on retro pie. When I search for how to do it, it says I need to go to "/opt/retropie/configs/all/retroarch.cfg" and edit ...
0
votes
0answers
16 views

VLC cannot read mjpeg video produced over USB webcam

I'm trying to use vlc to transcode a mjpeg stream from a USB camera connected to a raspberry pi 3B+, however VLC seems unable to read the mjpeg video stream from the camera, I already checked the v4l2-...
0
votes
0answers
14 views

making my own HIFI portable audio dac for raspberry pi zero w

i am currently thinking to setup a portable volumio audio player something like this one https://www.allo.com/sparky/miniboss-rpi-zero.html (i know i can order this instead nut my location(India) is ...
0
votes
0answers
12 views

How to configure TOR on RaspAp?

having problems with installing TOR on RaspAp application, could anyone take a look at it? https://imgur.com/a/YAPi2EQ 1# shows that nothing opens when i press "Save settings" 2# picture is after i ...
0
votes
2answers
18 views

Pigpio equivalent of GPIO's event_detected() function?

Is there an pigpio equivalent to GPIO's event_detected() function? I need something that is constantly watching for a button press. The code I currently have doesn't consistently detect it (python ...
1
vote
1answer
21 views

Cannot ssh into Raspberry Pi Zero W over wifi after enabling ssh

I'm trying to set up my Zero W to use as a headless server, so I've taken the following steps: Flashed Raspbian Buster Lite onto the SD card Put a file named wpa_supplicant.conf in the boot/ ...
0
votes
0answers
25 views

Raspbi spi CS line won't drive low

Raspberry pi 2 Model B V1.1 Not sure what's happening here, everything should work. Tried different cables, different pins on the analyzer, different laptop... the CE0 line won't go low. Currently ...
-1
votes
0answers
21 views

Rasp Wifi Access point no connection to internet

My raspberry connected via Ethernet to the modem and I am trying to set my raspberry 2 as wifi access point.With this tutorial I have two raspberries and both have the same problem, after everything ...
0
votes
0answers
13 views

Pi (2 or 4) stops responding when using RaspAp with EW-7811Un

I have a Pi2 and a Pi4 and also two EW-7811Un adapters. I can install Raspbian on both systems with either EW-7811Un and it will run without issue in that state including using the EW-7811Un. I can ...
0
votes
0answers
22 views

HC-SR04 Ultrasonic Rangefinder readings are way off

So im trying to make my Robot move by itself and then make a turn until the path is clear using the HC-SR04 Ultrasonic Rangefinder, but my problem is that my readings are off with a large margin, ...
1
vote
0answers
17 views

Can I connect CJMCU-4541 MICS-4514 Carbon Monoxide Nitrogen Oxygen Sensor with Raspberry Pi zero

This sensor CJMCU MICS-4514 Carbon Monoxide Nitrogen Oxygen Sensor is arduino compatible can it be used with raspberry pi
0
votes
0answers
15 views

symbol lookup error: undefined symbol: _ZN7QWidget8qwsEventEP8QWSEvent

I have cross-compiled executable file from QT 4.8.7. I am running it on a Raspberry PI (Ubuntu), with QT 4.8.7 and QT declarative module installed. When i run the executable file on my raspberry pi, i ...
-3
votes
0answers
23 views

Wifi Hacking on Kali Linux [on hold]

Recently I was written an article about WiFi hacking, can anyone read it and give your suggestions, Here is the link to the post https://www.techncyber.com/2019/06/hack-wifi-password.html
0
votes
1answer
27 views

Setting gpio input interrupt with direct memory access?

I am new learner for raspberry pi 3B+, I ever study stm32 mcu, but it's my first time to use an Linux OS on a developing board. I read the BCM2837-ARM-Peripherals manaul and learn how to turn on and ...
0
votes
1answer
22 views

Is it possible to make access raspberry pi 3b+ access point from wifi without ethernet and other external devices?

Is it possible to create access point from Raspberry Pi 3B+, without ethernet? I'd like to create access point like for example android hotspot, were you can start hotspot but you still can use ...
0
votes
1answer
20 views

Wireless interface removed when DHCP lease expires

I have configured the wireless interface on my Raspberry Pi 3 as follows: allow-hotplug wlan0 iface wlan0 inet dhcp wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf wireless-power off iface default ...
0
votes
1answer
44 views

Pre-Built openCV on raspbian Buster

The hassle of installing openCV on raspbian is something many want to avoid, and the easiest way to do this is to use a prebuilt image. I decided to take this route, only to find most pre-built images ...
0
votes
0answers
14 views

lsb_release -a gives 10!

I followed this tutorial, trying to upgrade directly from Jessie to Buster instead of Jessie to Stretch. then, when i check the version with $ lsb_release -a I get this! No LSB modules are ...
2
votes
0answers
37 views

Raspberry Pi 4 - Dual Audio with Dual HDMI

I have a Raspberry Pi 4. The thing is, I want to play 2 videos at the same time, since the RPi-4 has 2 HDMI outputs. BUT I also want to have split audio. The audio from video 1 should go out over the ...
0
votes
0answers
13 views

Get audio samples

I want to retrieve the audio samples that are playing on the output device (i.e. analog audio or HDMI). Is there any file I can cat to read those samples? I'm running the latest Raspian Lite on an ...
-1
votes
0answers
27 views

HC-05 and Raspberry Pi 3 automatic connection

I have sensors which connected to arduino. I would like to send data to raspberry via bluetooth. I make a following steps: sudo bluetoothctl power on agent on default-agent pair XX:XX:XX:XX:XX ...
1
vote
1answer
32 views

Simulate raspberry pi GPIO

Is there a software to simulate Raspberry Pi hardware design such as proteus? I would like : To use a raspberry pi as a virtual component, Do all the wiring, simulate, Simulate, test code, Check for ...
1
vote
0answers
23 views

Chromium semi freezing in a predictable way on very unclear reasons

I have a Raspberry PI 3B+/raspbian running my NodeJS (node-red) backend application. My Raspberry is hosting a frontend application (VueJS) as well. I also have a 7" display connected. The purpose ...

15 30 50 per page