Unanswered Questions

5
votes
0answers
1k views

Outputting audio to multiple sound devices simultaniously

I'd like my RasPi to send audio to my on board audio out port, and also to my Digital out card (an I2S Hifiberry Digi). This ought to be possible with ALSA. I have the drivers loaded and can send ...
4
votes
3answers
123 views

Cannot open 12V Solenoid Valve

I am a beginner in DIY electronics, and I am attempting to control a 12V Solenoid valve from a Pi B2 connected to a 12V Battery and WiringPi Pin 1. I am using a 1kOhm Resistor between the gpio pin ...
4
votes
0answers
49 views

Playing sound through /dev/dsp?

I have a USB soundcard attached to my RPi. I used the command sudo modprobe snd_pcm_oss which created /dev/dsp and /dev/dsp1. /dsp corresponds to the internal soundcard whereas /dsp1 corresponds to ...
4
votes
1answer
2k views

Is there a 802.11ac dongle for the raspberry pi or pi 2?

I understand the USB2 bus will limit the speed gain from the 802.11ac network interface. I still would rather buy a 802.11ac usb dongle as its primary use will not be with the raspberry pi. Is there ...
4
votes
1answer
2k views

Modern way to stream H.264 from the Raspberry Cam

I got the Pi B+ and the Pi camera and am now trying to find the most efficient (low CPU) and lowest-latency configuration to stream H.264 encoded video from the camera to my home server. I've read ...
4
votes
3answers
4k views

RF24 communication with Arduino

I have been trying for ages to work this problem out and can't figure it out. I have two nrf24 transceivers, one connected to the raspberry pi and the other connected to an Arduino. My code for the ...
4
votes
1answer
7k views

Bluetooth device is not available?

I followed this tutorial to set up my Bluetooth dongle and get it running. I have the same Bluetooth dongle that is in the tutorial, yet I can not seem to get it to work. I get to step "C" and then ...
3
votes
2answers
60 views

Random Freezes on B+

My Raspberry Pi B+ has started to freeze randomly for a few seconds only to continue as if nothing has happened. I'm connecting over SSH only (no keyboard/monitor) and at least once a minute it will ...
3
votes
0answers
72 views

Networking issue after update to Jessie

After updating from raspbian wheezy to raspbian jessie networking isn't working properly anymore. Folllowing lines seem to describe the error: ifplugd(eth0)[184]: Using interface ...
3
votes
0answers
39 views

RaspberryPi A+ USB Data Lines shorted

This is kinda weird problem. I used Raspberry Pi A+ for my small projects. I did all the programming using a USB WiFi dongle via SSH. It all went happy and fine until one fine day the dongle stopped ...
3
votes
0answers
69 views

RPi.GPIO under Python 3

Raspberry Pi2 B, standard Raspbian. Using RPi.GPIO, V3 installed as: sudo apt-get install python-rpi.gpio python3-rpi.gpio On line import RPi.GPIO I get ImportError: ...
3
votes
1answer
64 views

Webcam color issue with mplayer

I try to display (multiple) webcams on a hdmi screen with my Raspberry Pi B. At first I used (since some month ago) OpenCV solution for 2x C170 Logitech Webcam -> works flawless (5-6fps). Now I ...
3
votes
0answers
274 views

Video and audio out of sync when playing 1080p 60fps on Raspberry Pi 2

I have a 1080p @ 60fps mp4 video saved in a external USB HDD. I've tried playing it on Raspbian in my Pi 2 (the new one, 1 GB RAM, 1 GHz) with Omxplayer, but the audio and video are out of sync. The ...
3
votes
1answer
199 views

Move OS to new USB stick in Berryboot

I am running Berryboot v2.0 with Raspbian and OpenELEC v4.0.6 installed. Initially I selected a usb stick (USB-A) as the destination drive. I want to install more OS's but USB-A is too small (4GB) so ...
3
votes
1answer
411 views

Why won't SDL 2.0 give me an OpenGL ES 2.0 window?

I have a small SDL 2.0 program (detailed below) that refuses to give me a window, complaining about not being able to initialize its OpenGL ES library. Program: #include "bcm_host.h" #include ...

15 30 50 per page