All Questions

7
votes
0answers
701 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 ...
5
votes
0answers
106 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 ...
5
votes
0answers
234 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 ...
5
votes
0answers
8k 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 ...
4
votes
0answers
68 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 ...
4
votes
0answers
89 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
361 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 ...
4
votes
0answers
259 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
0answers
117 views

service for mongodb 3.4 server on SLES 12 SP2 Doesn't start(Raspberry Pi 3)

The link below was the source: https://software.opensuse.org/download.html?project=server:database&package=mongodb It was the only mongodb 3.4 which could be installed correctly but unfortunately ...
4
votes
0answers
2k 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 ...
4
votes
0answers
578 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
0answers
703 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
208 views

How to control the delay perference of GStreamer OpenMAX H.264 encoder module?

I am trying to build up a streamed network video using Raspberry Pi 3 Model B and a USB camera. After reading this tutorial, I made a working pipeline, but the software H.264 encoder is very CPU ...
4
votes
0answers
405 views

Unable to capture high-quality video on pi in Java(FX)

Current I am developing a JavaFX application that should display video to the user. I use https://github.com/sarxos/webcam-capture to retreive video data. I use v4l4j to get video on the pi. I use ...
4
votes
0answers
426 views

RPI 3B and Tiny Thermal Printer - Unable to use python library

I'm having trouble hooking up my Raspberry Pi 3 Model B to my Adafruit Tiny Thermal Printer (nb: not the mini thermal printer - this is the one with a mini-USB port built in). I've got it connected ...
4
votes
0answers
390 views

No Audio MPC MPD bluetooth speaker

I can't get any audio from mpc. I can listen to sounds from websites. I think I might need to edit the etc/mpd.conf This might help as well:
4
votes
0answers
1k views

Can the Compute Module 3 support 240fps from the Pi Camera v2?

The Compute Module 3 supports CAM1 with 4x Lane CSI MIPI as does the official doc for the Sony IMX219 camera module. It has been explained in many places that the reason the standard Raspberry Pi ...
4
votes
0answers
651 views

Not getting a response from a connected PIR sensor

I have a PIR sensor which I'm using connected to a Raspberry Pi 3 Model B as part of a Magic Mirror project. I'm running this module for the sensor. I've had the Motion Sensor working before, but now ...
4
votes
0answers
239 views

Strange I2C behaviour

First of all: sorry for the title, I don't know how to describe further... Background: I'm working with the RDA5807M FM receiver chip. It worked fine for at least one month now. I just had jumper ...
4
votes
0answers
292 views

Is it possible to install Rocks Cluster Distribution on Raspberry Pi?

There are lots of websites about making a supercomputer with Raspberry Pi. Is it possible to install "Rocks Cluster Distribution" on Raspberry to have a more efficient cluster?
4
votes
0answers
207 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-...
4
votes
0answers
493 views

Is there a unique device ID for pi cameras?

I have multiple pi3s and multiple v2.1cameras. I'm taking pictures with a python script using picamera, I use the pis mac address as an identifier for the pi but I was hoping to be able to get a ...
4
votes
0answers
1k views

Permission issues using sickrage and transmission

I've setup transmission and sickrage to automattically download series. This went well, however when Sickrage tries to move the files, it gets stuck and the logs say: 2016-07-25 16:10:13 POSTPROCESSER ...
4
votes
0answers
199 views

I2C windows iot can't connect

I'm trying to communicate between a Raspberry Pi 3 running Windows 10 IOT (build 14376 insiders) and a T-REX Manual here using I2C protocol. The thing is that it always crashes, so after some ...
4
votes
0answers
188 views

Extremely slow download, while upload works fine

The download speed on my Pi is somehow almost dead (working in Bytes/sec and then gets stalled). I tried downloading files through wget, download files over LAN using scp, using rsync and yet it's all ...
4
votes
0answers
255 views

Raspberry Attempted to read or write protected memory. This is often an indication that other memory is corrupt

I have the following code, and the StopWatch object, when I try to restart it, it throws this exception: Attempted to read or write protected memory. This is often an indication that other memory is ...
4
votes
0answers
2k views

Stream video from camera using ffserver?

I'm trying to stream video from the camera module using ffserver. My server configuration is HTTPPort 8090 HTTPBindAddress 0.0.0.0 MaxHTTPConnections 8 MaxClients 4 MaxBandwidth 1000 CustomLog - #...
4
votes
0answers
739 views

Can't connect PS3 controller to Pi using Sixaxis

I am trying to use sixaxis to connect a ps3 controller to my Raspberry Pi. When I run sudo ./sixpair_rpi, I get: Current Bluetooth master: xx:xx:xx:xx:xx:xx Setting master bd_addr to xx:xx:xx:xx:xx:...
4
votes
0answers
1k views

Restart NOOBS downloading process?

I was at university with NOOBS in SD card and my Raspberry. I need to install OpenELEC which is downloaded from Internet. However, it seems that university cable network doesn't provide DHCP or ...
4
votes
0answers
841 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....
4
votes
0answers
878 views

Full duplex Audio With USB Sound Card

I setup Raspberry Pi with external usb sound blaster sound card. My Goal is to be able to record and play audio simultaneously. I setup and configured it to be the default sound card as follows: sudo ...
4
votes
0answers
804 views

Inateck BTA-CSR4B2 USB Bluetooth 4.0 Adapter not scanning

I bought an Inateck BTA-CSR4B2 USB Bluetooth 4.0 Adapter and plugged it into my Raspberry Pi. Setup was smooth (got bluetooth, blueman, bluez-utils from apt-get), but I can't get any scan results from ...
3
votes
0answers
73 views

Are the camera and display connectors of my 3B+ soldered the wrong way around?

I recently purchased a new 3B+ board and although the board board itself is working fine, I can't get the PiNoir camera to work. The camera works fine on an another 3B board. I tried several tricks on ...
3
votes
0answers
166 views

Why doesn't extract-vmlinux work with Raspbian's /boot/kernel*.img?

To monitor if a reboot is necessary, I wanted to compare the version of /boot/kernel*img against the version of the running kernel. To get the kernel version of a compressed linux kernel image (...
3
votes
0answers
185 views

Accelerated Numpy on Pi 3 B+

I'm looking to do some work with NumPy on my Pi 3 B+, and I'm not sure what the deal is with optimization, blas, etc. I installed libatlas using: sudo apt-get install libatlas-base-dev Following ...
3
votes
0answers
362 views

Raspberry PI 3 - Browser, bad performance (Website with HTML5 canvas)

I have encountered a problem while developing a dashboard which is supposed to run on a Raspberry Pi 3. It is a combination of a HTML5 canvas as background to create visuals and some simple elements ...
3
votes
0answers
645 views

On-screen keyboard with app integration

I'm aware of matchbox-keyboard, but I'm looking for a more Android or iOS kind of keyboard solution. When selecting a text input, of type alpha or numeric, I would like the appropriate keyboard, text ...
3
votes
0answers
61 views

Is it possible to virtually trigger a GPIO Input pin when nothing is actually connected to it?

I am trying to use incoming MIDI data on my Raspberry Pi 3's USB port to virtually trigger an input GPIO pin. The reason for this is as follows: I'm using the MIDI out port on a Behringer X-32 audio ...
3
votes
0answers
275 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 ...
3
votes
0answers
98 views

Wrong sources.list entry after adding resilio sync repository

I followed this Guide to install resilio sync on my RPI1. Installation works but I get an Error if I run sudo apt-get update. W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/...
3
votes
0answers
665 views

Unable to install Firefox or Thunderbird (Icedove)

I have been trying to install Firefox and Thunderbird on Raspbian Stretch, but I have not been able to. Edit: This issue seems to have been resolved for now. For some reason the sudo apt-get update ...
3
votes
0answers
369 views

uv4l and janus “use of hardware codec is disabled in this restricted edition”

I have a rpi 3 with the v2 camera running stretch 9.1. I've installed raspicam and uv4l according to the instructions on linux-projects.org. I have the janus gateway setup on a separate box. I am ...
3
votes
0answers
2k 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 ...
3
votes
0answers
1k views

Rasbperry Pi suddenly stopped connecting to WiFi network defined in wpa_supplicant.conf

My Raspberry Pi 3 running Jessie has been automatically connecting to a WiFi network defined in my wpa_supllicant.conf file for a few months without a problem. Two days ago, the Pi stopped connecting ...
3
votes
0answers
311 views

Why is my RPi freezing of its own accord?

I own a RPi 3 Model B, which does a very good job of freezing of its own accord, even when not much activity is being done. I mean, I can still move the mouse, but it stays in its last frame and I ...
3
votes
0answers
682 views

Pi doesn't detect microphone but detects usb device

I had my Raspberry Pi configured to work with a USB microphone (C-Media microphone USB). I had made the following changes For /lib/modprobe.d/aliases I update the following lines options snd-usb-...
3
votes
0answers
613 views

Connecting Pi3 ModelB with a Sony PS3 DualShock controller

I bought the following model of Raspberry Pi3 from Amazon. RASPBERRYPI3-MODB-1GB which claims to support: Bluetooth 4.1, Bluetooth Low Energy And I also got a Sony DualShock PS3 controller with ...
3
votes
0answers
598 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? ...
3
votes
0answers
666 views

Stream a camera, and get the video feed on Java

For my project, I have two USB cameras. I would like to plug them to the Raspberry Pi to stream over the internet. Also, I am developing a software in Java, and these videos streams (2) have to be ...
3
votes
0answers
73 views

Raspbian Jessie Wi-Fi doesn't work with multiple IPs on same network

I would like to use two different static IP addresses for the same network with the same Wi-Fi dongle. I read in different forums that it's better to use /etc/network/interfaces instead of dhcpcd.conf ...

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