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7,415 questions with no upvoted or accepted answers
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14
votes
1answer
3k views

How to get touchscreen right click on Raspbian Stretch

I am currently using Raspbian Stretch with a Waveshare 7 inch touchscreen, and I would like to get right click input (preferably with two finger or long touch). There appear to be no solutions for ...
9
votes
1answer
986 views

Autologin into a webpage via the default GNOME-Webbrowser

I'm trying to call a html page like this with the Raspbian's default web browser and it leads me just to the default login-page. Neither does it with Midori on the desktop. When calling the exact ...
8
votes
2answers
243 views

Problem when plugging an HDMI extractor to the Pi

I use my Raspberry Pi with Kodi on it (probably one of the last version with both a Pi 2 and 3). A few months ago, I bought and HDMI extractor so that I could use my Home Cinema using the Passthrough ...
8
votes
2answers
887 views

Pi won't boot after initramfs update

I have been trying to get Raspbian Jessie, installed from the image to boot with an encrypted root partition. I was successful in following the guide here. When I boot the Pi, it drops to an ...
7
votes
0answers
215 views

Cannot Use SPI frequency above 500 kHz

I am running Arch Linux ARM on a Raspberry Pi 2 Model B, and I am attempting to communicate with a TFT display. I am writing a kernel module to interface with the display using SPI, and it works, but ...
7
votes
1answer
898 views

Thermal printer with Raspberry Pi 2 outputs only Chinese chars

Following thermal printer + raspi2 tutorial for printing images (https://learn.adafruit.com/networked-thermal-printer-using-cups-and-raspberry-pi/connect-and-configure-printer), I've already connected ...
7
votes
2answers
8k views

Configuring Raspberry Pi 2 to use USB Microphone and Headset as default device on Jessie

I am attempting to setup a Plantronics .Audio 400 DSP with a Raspberry Pi 2 Model B as the default device with Jessie installed. Headset Link: http://www.plantronics.com/us/product/audio-400-dsp So ...
6
votes
0answers
369 views

connmanctl having problem with complex passphrase

The built in WiFi module seems to work fine, as it can connect to both of my open networks I created for testing, i.e. the 2.4GHz, and the 5.0GHz ones. If I set a simple passphrase (i.e. contains ...
6
votes
0answers
511 views

USB OTG on Compute Module 3

Has anyone ever tried configuring the USB of the Compute Module 3 as USB OTG? In the default kernel (Raspbian Stretch - Kernel7), support for usb otg appears to be disabled. Has anyone managed to ...
6
votes
1answer
1k views

How to start Xorg while showing splashscreen?

I'm creating a simple device with a Raspberry Pi and a touchscreen display connected to it. On boot, I want to show a loading image (a simple gif or jpg) while X is starting. Then a chromium-browser ...
6
votes
2answers
1k views

Capture Photos while Streaming

At the moment, i have Pi Camera > Pi > Ethernet Cable > Pi > Display, and using the codes from, https://www.youtube.com/watch?v=r80dcfzClD4 i am able to stream video from one Pi to another. What i ...
6
votes
0answers
11k views

How Can I Emulate An x86 CPU on a Raspberry Pi with Qemu?

!!DISCLAIMER!! I am aware that this question has been asked before HERE, but after having followed that question step by step, troubleshooted on my own and having done plenty of research on the ...
6
votes
2answers
4k views

Why does the Sense Hat / Astro Pi show the wrong temperature and humidity?

I recently bought the sense-hat, previously called astro-pi. Unfortunately the temperature shows 28 to 31 degrees Celsius from both temperature sensors on the board. They often show around 30 degrees ...
6
votes
1answer
370 views

Xbian does not allow harddisk to stand-by for long

I have an external 2TB WD Elemens harddisk recently purchased plugged into the USB of my Raspberry Pi with Xbian 1.0 beta 2 installed. This disk has internal power management so it enters stand-by ...
6
votes
4answers
1k views

Raspberry Pi - Rainbow screen

I'm trying to boot up Exton's Android build on Raspberry Pi 2, but I seem to be getting the rainbow screen. Here is what I have - 4 partitions as follows boot which has 512 MB, flagged as bootable ...
5
votes
3answers
741 views

Clients connected through OpenVPN unable to process DNS requests through Pi-hole

I am on Rasbian Stretch. I installed OpenVPN (via PiVPN) and Pi-Hole (4.2). I setup my Pi-Hole (that runs on 192.168.1.6 on the LAN) to use Cloudflare DNS over TLS (using the cloudflared service on ...
5
votes
0answers
132 views

Raspberry as I2C Slave, how to slow down transfer rate?

I have had minor success using the PIGPIO library and interfacing the Pi as an I2C Slave (Using GPIO Pins 18 and 19 as SDA and SCL) with a Campbell CR1000X Datalogger I am encountering a problem ...
5
votes
1answer
472 views

Rasberry Pi zero and 3 bluetooth transfer speed is slow RFCOMM

I am trying to send a series of bytes from the Raspberry Pi zero W to the Raspberry pi 3 via bluetooth. Im using the PyBluez python package. I believe that Raspberry Pi Zero has Bluetooth 4.1 and ...
5
votes
0answers
5k views

Running Selenium & Firefox & geckodriver on Raspberry Pi 2 Model B

I'm trying to run Selenium on my Raspberry Pi 2 Model B but I'm having trouble finding a compatible combination of versions of Selenium, Firefox, and geckodriver. (I've already run sudo apt-get ...
5
votes
0answers
4k views

Chromium scrolling lag on Raspberry Pi 3 Model B running Raspbian Stretch

I received my Raspberry Pi 3 Model B a few days ago, I copied Raspbian Stretch img with dd to 64 GB Samsung EVO card. I am using a HDMI to VGA adapter on a 1920x1080 Samsung monitor. Also, I have ...
5
votes
0answers
721 views

Can I control GPIO Pins when using Android on the Pi 3?

I want to install Android on my Raspberry Pi for implementing a GUI app, which is easy to create using Android Studio. But now I am confused about how to control the GPIO pins on the Pi 3 to turn on ...
5
votes
2answers
334 views

Pi4J kills USB bus?

Hello fellow Pi enthusiasts :) I am currently attempting to control a standard 16x2 character LCD display from the PI's GPIO pins from Java. I downloaded Pi4J and wrote a small program to initialize ...
5
votes
1answer
1k views

GY-521 module / MPU-6050 3x Accelerometer not detected by i2cdetect

I got this GY-521 module (https://www.aliexpress.com/item/MPU-6050-3-Axis-gyroscope-acce-lerometer-module-3V-5V-compatible-For-Arduino/2035920870.html?spm=2114.13010608.0.0.pRpLS4) and no matter what ...
5
votes
1answer
2k views

How to add audio as an input for ffmpeg capturing?

I've been lurking for a while now and I finally created an account because I'm stuck on this particular problem. I've got a raspberry pi 3 with a camera attached to it. I'm able to capture video as an ...
5
votes
6answers
6k views

Raspberry Pi 3 HDMI Not working

I have raspberry pi 3 model b and windows 10 PC. I downloaded Raspbian instead of NOOBS in order to be able to modify the config.txt file. But I'm still having the same problem, that my display doesn'...
5
votes
0answers
6k views

Open Splash Page After Connecting to Wifi Hotspot

I'm using my pi3 to display a local "website" as described here Making a Raspberry Pi 3 accessible w/o configuration via WiFi and static IP/URL. Therefore, I'm creating a hotspot with the pi. This ...
5
votes
0answers
263 views

Wi-Fi transfers hang on Raspberry Pi 3

I was trying to transfer a 50 MB file to my Raspberry Pi 3 via samba and I noticed that after few seconds the transfer slows down until it stops, same thing via scp. It starts but after few seconds (5-...
5
votes
1answer
6k views

Connect Raspberry PI 3 B to Bluetooth speaker and microphone

I have Bluetooth speaker which has microphone in it, when I use it with iPhone and my PC, the microphone works fine. Now I connected it to Raspbian on Raspberry PI 3 B via inbuilt bluetooth, speaker ...
5
votes
1answer
2k views

How to blacklist devices on a raspberry pi 3 router setup?

I've recently set up a raspberry pi 3 as a simple wifi router, using: Ubuntu 16.04 hostapd dnsmasq I've followed the following tutorial and all went pretty smooth: https://frillip.com/using-your-...
5
votes
0answers
550 views

Debugging a RPi using SWD

Has anybody been able to figure out how to debug a Raspberry Pi 3 model B using SWD? To be clear, I'm looking to debug the Pi itself using SWD. We've tried setting up the GPIO pins to use JTAG-SWD, ...
5
votes
1answer
308 views

Kernel/Firmware as Debian package

It says on the official site that "the kernel and firmware are installed as a Debian package, and so will also get updates when using [apt-get upgrade]" I run apt-get update / apt-get dist-upgrade ...
5
votes
1answer
1k views

rpi 2: Unable to change irq affinity

I am trying to optimise getting GPIO interrupts into userspace. On the single core rpi 1 I couldn't get rid of quite some timing jitter, which makes sense as there's a lot of stuff going on on the cpu....
5
votes
1answer
1k views

how to connect raspberry pi to google home app?

How am I to connect my Raspberry Pi 3 (PIXEL desktop) to the Google Home app if it already has Google assistant on it?
5
votes
3answers
3k views

Suddenly unable to connect to 5GHz wifi network (PiZero)

OS is Raspbian Jessie with latest updates. Everything is stock packages, no special configuration either. It just runs eJabberd at the moment. As of a few days ago, I have stopped being able to ...
4
votes
0answers
56 views

Prevent under-voltage warnings from printing to the console

My Pi occasionally experiences an undervoltage for a second. I am working on fixing it but my main concern is that my Pi is being used in a kiosk application that displays a text output to the ...
4
votes
1answer
33 views

Installing Etcher and Octopi: Unable to to Unzip and Install either of these programs?

So I have received my Raspberry Pi 3 B+ in the mail. Plug it in and hook it up. Everything works awesome up until this point...I would like to mention that I have been a Windows user my whole entire ...
4
votes
0answers
187 views

Custom camera driver

Is it possible to write a driver, say for a OV camera, based on the existing drivers at the RPI git repo? As is I understand, with a datasheet for a sensor it should be possible to write a similar ...
4
votes
0answers
118 views

How does the hardware cause long delays?

I want to write a bit-banging driver for a Raspberry Pi 3. For testing I developed a simple Linux kernel mode driver which toggles a GPIO pin with approx. 1Mhz. Here is the code excerpt. static ...
4
votes
0answers
614 views

Bluetooth PAN on the Pi Zero W

I have the following problem: I want to host a webserver on my Pi Zero W and access it over Bluetooth. To achieve this i tried to use PAN as underlying layer. The first time i followed this post. Most ...
4
votes
1answer
248 views

Conflicting dtoverlays and framebuffer

I have a RPi3 with latest standard kernel. I am making use of spi1. In config.txt I have the line: dtoverlay=spi1-3cs. I have 2 ADC's connected to spi1 and all seems fine, using an HDMI screen to ...
4
votes
1answer
1k views

ffmpeg performance degrades over time

I am using a Pi Zero W with the Pi camera (noir) to stream live to Youtube using ffmpeg. The command line I am using is: raspivid -o - -t 0 -h 720 -w 1296 -fps 24 -b 6000000 | ./ffmpeg -ar 44100 -ac ...
4
votes
1answer
321 views

crontab entry with parameters?

My goal was to make my Pi create its own WiFi on start so that I can connect to it wirelessly. I have succeeded by creating a crontab entry (using sudo crontab -e): @reboot /path/to/create_ap.sh &...
4
votes
0answers
317 views

Watchdog service doesn't kick /dev/watchdog in OSMC

I have installed watchdog service on OSMC/Raspberry Pi 3. It starts now automatically, but doesn't touch the /dev/watchdog device. How I check this: ls -l /dev/watchdog crw------- 1 root root 10, ...
4
votes
1answer
863 views

How do I install the DisplayLink driver for Ubuntu on Raspbian?

I have a Raspberry Pi 3 Model B v1.2 with Raspbian Stretch 9.1 as an OS. I have the USB graphics adapter Kensington K33907. How can I proceed to install the DisplayLink driver for Ubuntu on Raspbian? ...
4
votes
0answers
619 views

Android Things (0.5.1) fails to initialize GPU on Raspberry Pi 3 Model B?

I have just set-up a Raspberry Pi 3 with Android Things using the latest developer preview (5.1). It boots and I can run some minimum samples, and the output can be seen normally in a HDMI screen. So, ...
4
votes
1answer
284 views

How to make sense of this Raspberry Pi project guide for building a theremin?

I have just started out using a Raspberry Pi, and for my first project, I wanted to build a pseudo theremin using an ultrasonic motion detector and other electronic components (requirements are laid ...
4
votes
0answers
703 views

FT5406 touchscreen sends events but input does not work

I have a Raspi 3B with the official 7" touchscreen attached. The screen works (showed the under-voltage sign when attaching only the screen controller to a 2.1 A power supply, so I'm connecting ...
4
votes
0answers
158 views

Check if a host device is connected to Pi Zero gadget

How can the Pi detect if a host device has been connected, and gather information about that device, when being used as a gadget (such as mass storage). It would be useful if I could detect this ...
4
votes
0answers
873 views

Unable to autosave snes rom (Zelda)

I've added to /opt/retropie/emulators/retroarch/retroarch.cfg: input_enable_hotkey_btn = 8 input_exit_emulator_btn = 9 based on http://nickbartlett.com/retropie-emulationstation-not-saving-game-...
4
votes
0answers
279 views

I2s DAC audio out but USB audio in

I was wondering if anyone could help me. I am trying to set up my Pi 3 to be an assistant (Google or Alexa, etc). I had it set up working fine with the USB mic and the 3.5mm audio out, but I wanted ...

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