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7
votes
5answers
6k views

Can we order custom made Raspberry PI?

I may need a modified version of Raspberry PI. For example I do not need the HDMI out or the video out no USBS add a 3G modem... Is this feasible and what may be the cost of such a change. The ...
0
votes
1answer
307 views

Move files from Mac OSX to Raspberry Pi

I am trying to move my sickbeard.db file from my Mac running OS X 10.9 to my Raspberry Pi so that Sickbeard can run on the Pi and not my Mac. I am unable to tell what the username and password to the ...
6
votes
1answer
3k views

Sleep in Bash is innacurate

I'm running a script (taking time-lapse photos) that I would like to execute every minute. I'm using the Raspberry Pi camera board and thus using the raspistill function, but am not using the in-built ...
1
vote
3answers
972 views

Raspberry Pi network camera

I need to write an application that runs on a Raspberry Pi and camera board that listens to a network trigger, then captures an image and sends it back. I have a lot of C# experience, but never ...
10
votes
2answers
23k views

Why does USB port enumeration change?

I'm using a Huawei GMS/UMTS USB modem with Gnokii and Gammu. The modem was in the lower port on Pi. With dmesg | grep tty it would show up on /dev/ttyUSB0 and /dev/ttyUSB1. (2 USB devices on 1 stick ...
1
vote
1answer
458 views

CGI script minor problem

I'm building a remote vehicle with the Raspberry Pi. I've got everything working except a few little things. I'm trying to implement some CGI scripts in my server in order to control the car from an ...
3
votes
2answers
4k views

Which framework is best to communicate with Internet?

I see a lot of tutorials who use node.js with Raspberry pi (and even with the Raspberry Pi and Arduino working together). I also see a lot of examples in Python (Python is already installed in ...
2
votes
1answer
19k views

OpenCV cv2.VideoCapture(0) doesn't work

The question is a bit similar to this question. The main difference is that I'm using a different camera (the Raspberry Pi camera board). I've spend a few days exploring Python and OpenCV. I'm ...
0
votes
2answers
1k views

Can 3.3v GPIO pin be used for buttons that don't need power?

I'm currently turning my pi into a retro gaming unit. I have used pins 2,3,4,17 and GND for the joystick. Button 1: 18 & GND Button 2: 23 & GND Button 3: 24 & GND Button 4: 7 & ...
4
votes
1answer
3k views

Can a Raspberry Pi be used to make voice changer?

There are voice modulators for over $150, and all they do is alter the pitch and put a static burst when there is a silence of over 0.5 seconds. Surely this can be done on a Raspberry Pi with a USB ...
1
vote
0answers
4k views

How to repair my SD card installation?

I have a Raspbian installation on which I installed a lot of stuffs. A few weeks ago, I bought a Class10 16Gb card and cloned my raspbian installation from my old Class4 4Gb SD card to this new SD ...
0
votes
2answers
492 views

Not able to detect interrupt on GPIO 2

I have counter which is sending pulse every second to GPIO 2 and I wrote the following code to detect it #!/usr/bin/python import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(2, GPIO.IN, ...
0
votes
2answers
2k views

Scratch GPIO Shows Limited 'Sensor Value' Options

hope this question is relevant to the community here: I have installed Scratch GPIO where I hope to turn on LEDs using broadcast 'pinXon' or 'pinXoff' where the X is the GPIO pin to interact with. I ...
1
vote
1answer
271 views

Using pyserial to transfer data via XRF

I have a small python program that writes a 4 digit number to the serial port every second, using pyserial. I have connected an XRF module (from CISECO) to the sending pi and another XRF to another pi....
1
vote
1answer
123 views

Is there a solid/known way to connect r/c model components?

I am just starting out with my Raspberry Pi and I was wondering if it is possible to connect r/c model components to my raspberry and control them with raspbian/node.js. The quality and pricing of ...
2
votes
2answers
3k views

Execute C program from web server

When clicking a button on my web server, I need a C script executed. I'm using CGI but I'm getting: [Tue Dec 10 11:17:57 2013] [error] [client 172.17.223.62] Premature end of script headers: ...
5
votes
4answers
18k views

Show IO value on webpage in realtime

I would need to check the value of a IO pin in realtime over the LAN. Since I need to do it from differnet devices (pc, palm, iphone, Samsung galaxy etc) I was thinking of a webpage. The value can be ...
1
vote
1answer
209 views

Which config ? tomcat nat or combo tomcat+mod_jk+apache

I just received my Raspberry pi which I plan to use for a gwt webapp. In performance view, what will be better to do ? only tomcat with NAT to serve my http external port serving static content (....
2
votes
1answer
8k views

Could not find YouTube addon for OpenElec

I have installed OpenElec XBMC on my Raspberry Pi. I checked the IP address and also the internet activity (I could see weather info and the news feed). Here's what I did to install the YouTube addon:...
5
votes
2answers
1k views

Halting inevitably leads to reboot

I always shut down the system with halt, which is the equivalent of shutdown -h now. On every linux system I've ever used, including up until recently the pi, this halts the system and turns off the ...
5
votes
2answers
4k views

Maximum number of USB devices supported

Assuming I can solve for power (externally powered hubs) is there any maximum number of supported USB devices that the pi can handle? Large(ish) hubs 7-8 ports are relatively cheap and I am wondering ...
2
votes
2answers
9k views

Triggering a solenoid off GPIO

this solenoid is killing me! I have it connected to a GPIO pin, and I've tried running it both from that to 3.3v, and to GND. Either way, with Low or High written to the pin, respectively, it doesn'...
16
votes
6answers
37k views

What speed of SD card is better?

I have to bought a SD card for my raspberry pi. It is better to have a huge writing speed (like 95 MB/s) or it is not so important and I can buy slower SD (30 MB/s or 45 MB/s) ?
1
vote
0answers
840 views

Raspberry Pi X-session fails to load over SSH

Am connecting from my Linux (Mint) desktop to the Fedora (rpfr18) Raspberry Pi using SSH X tunneling. When the Pi comes up, I connect to it from the desktop xterminal using: SSH -X root@192.168.x.y ...
1
vote
1answer
136 views

Is it harmful to write to a GPIO pin when there is nothing hooked up?

Is it possible to harm the Raspberry Pi by writing to a GPIO pin through software when there is nothing hooked up? From what I understand, this should not do any damage, but I want to make sure.
0
votes
1answer
697 views

yt youtube viewer for other services

I am using yt to view youtube videos from a headless pi (set up using these directions: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=35&t=8157)-- it works pretty well. However, the backend of ...
1
vote
1answer
2k views

Raspbian wheezy with XBMC plays only audio for 1080p videos

My current configuration: Raspberry pi, overclocked to second highest speed (Highest speed - Turbo isn't playing good, I get freezes, stutter in video etc) uname -a output: Linux raspberrypi 3.6....
4
votes
0answers
3k views

Raspberry Pi has no internet and cannot ping primary router when connected to repeater [closed]

I have been having networking problems whenever my Raspberry Pi is connected to a router configured as a wifi repeater. I have now tried this with two routers, a Netgear WNR2000v3 router running DD-...
1
vote
0answers
614 views

cron jobs won't run after boot on linux arch

I'm trying to setup a cron on boot to run yet it doesn't seems like it's working( [root@alarmpi ~]# crontab -l @reboot /root/cgminer XXXXXXXXXX @daily `which pacman` --sync --refresh [root@...
1
vote
0answers
1k views

Kernel panic Attempted to kill init! - Android kernel on raspberry pi

I compiled an Android Linux kernel for raspberry pi. The board seems to boot with that kernel but I get the following error when it tries to run /init process. Kernel panic - not syncing: Attempted ...
2
votes
1answer
1k views

How does developing an OpenGL ES application for the Raspberry Pi differ from desktop Linux?

I am beginning to learn OpenGL ES 2.0 through both the excellent book OpenGL ES 2.0 Programming Guide and the famous Arc Synthesis OpenGL tutorial. However, I have heard that the Raspberry Pi's ...
1
vote
3answers
15k views

How to open up terminal (gui) at startup and execute a command?

I want to be able to open up terminal (gui) on start up and execute a command inside that terminal. I'm placing this inside my /etc/rc.local x-terminal-emulator -e python /home/pi/pythonFile.py ...
1
vote
2answers
3k views

Having trouble reading (MQ 4) sensor digital value

I've a MQ 4 (smoke etc) sensor module, as listed here. It has these inputs/outputs: VCC = +5V DOUT = digital out AOUT = analogue out GND When I connect it to a voltmeter it outputs (DOUT) 3.1V when ...
1
vote
1answer
925 views

How to test RPi.GPIO setup?

After several maddening errors it occurs to me that there is a problem in my GPIO setup, to wit, RPi.GPIO is failing silently. To test this theory I got my multimeter, set it to volts, put one probe ...
20
votes
3answers
27k views

Do I have to connect a resistor to my DHT22 humidity sensor?

I've just bought a DHT22 sensor to connect to my RPi but most tutorials mention there should be a resistor connected between the sensor and the GPIO pin. Is this necessary? Will it work without or ...
9
votes
4answers
22k views

Is it possible to stream H.264 with RTSP on Raspberry Pi?

I'm trying to set up a video conferencing system by using two Raspberry Pi boards. How can I stream the H.264 protocol over a real-time streaming protocol via an Ethernet connection? Which OS should ...
0
votes
1answer
634 views

Running python CGI file as root to control GPIO

I have a python program to control GPIO of raspberry pi. Webserver installed is apache2. But when accessing GPIO from the program I get an error to run the program as root since /dev/mem is not ...
2
votes
1answer
2k views

How can I convert an optical mouse into an optical flow sensor?

I'm working on a rover.I'm using it with Raspberry Pi as my microprocessor.And can anyone tell me that whether i need an encoder with it.
1
vote
1answer
6k views

X11 forwarding between Debian and Raspbian

I like to use a browser on my Raspberry PI from my Debian Wheezy using SSH with X11 forwarding. I found that X11 forwarding is enabled by default in Raspian and also xauth is installed. Then I try ...
1
vote
3answers
4k views

Water irrigation system for Raspberry Pi

I'd like to design a system using a Raspberry Pi to control a water valve. What types of electronic components would I need? Also, how could I control it from an android smartphone.
2
votes
2answers
11k views

Unable to setup WiFi on Arch Linux and Realtek rtl8192cu

I'm trying to follow Wireless Setup - ArchWiki to set up my WiFi, yet running into some issues: [root@alarmpi ~]# dmesg | grep -i rtl8192cu [ 7.697779] usbcore: registered new interface driver ...
3
votes
2answers
422 views

RPi doesn't work after formatting SD card

I have working with Raspberry Pi for the last month. I tried to downloaded the OpenCV library today and I noticed that the SD card is only using 2GB out of 8GB so stupidly, I tried to reformat my SD ...
0
votes
2answers
2k views

I need a USB keyboard, mouse and wi-fi adapter to work on my RPI *under 200mA*

I am the co-founder of http://communitykit.org/. I was wondering if anyone knows of a good combination of a wired keyboard, mouse and wireless adapter for the Raspberry Pi. The trick is they all can'...
0
votes
1answer
378 views

Raspbian Kernel panic after RTC module .ko - How to unload modules at boot time?

I am playing with the RasClock RTC module. After baking my own rtc-pcf2127a.ko, and following the tutorial from the website, I got a kernel panic when booting (Null pointer etc.) Could not find any ...
1
vote
0answers
2k views

Music Visualizer for OMX Player

I'm trying to play msuic (mainly mp3 files) on the Raspberry Pi connected to my TV via HDMI. I'm using 9b52cee binary of OMX Player from here. Audio playback is successful, but the TV screen is blank. ...
8
votes
2answers
418 views

How to turn my Raspberry Pi into a small game console?

I am thinking about turning my Raspberry Pi into a game console but I was wondering how much it will cost and how difficult it actually is. I tried finding some guides to do this but it did not help ...
3
votes
1answer
5k views

Is it possible to connect multiple Arduino uno boards to Raspberry pi?

Need to connect Multiple Arduino Uno boards to Raspberry Pi for operating Appliances. After little bit of tweaking, I found some blogs for connecting single Arduino Uno board to Raspberry Pi. Is it ...
7
votes
3answers
21k views

How to communicate between Raspberry Pis using WiFi?

How do I communicate between 2 Raspberry Pis with WiFi dongles? I have connected the 2 WiFi dongles to the router but I do not know the next step of how to get them to communicate. For in this case I'...
1
vote
1answer
379 views

RPi used as wakeup-light, bashscript+CEC+Raspbmc

I've a vision about using my RPi as a wake up light device along with my TV. The way it "should" work in my head is that I have it constantly on, checking the time. At a certain time it sends a CEC ...
2
votes
2answers
6k views

HDMI-CEC pass through reciever?

my setup is this: Samsung LCD TV Raspberry Pi model b rev 2 Logitec Harmony One Remote Yamaha HTR-4065 AVR and it have worked really well to controll openelec with the harmony remote (that was set ...

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