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38
votes
4answers
135k views

Setup Raspberry Pi 3 as bluetooth speaker

I am looking for a way to configure the Raspberry Pi 3 as bluetooth speaker using Raspbian Jessie. What I mean by as bluetooth speaker is use it to receive audio stream via bluetooth using A2DP and ...
38
votes
12answers
96k views

64-bit OS on Raspberry Pi 4

Looking for a 64-bit version of Linux for the Raspberry Pi 4. I'm aware that support under Ubuntu Mate is in the works, apparently Ubuntu Server works but it limited to using 1 GB of RAM. Are there ...
38
votes
7answers
32k views

Powering without using the micro USB

Is it possible to power the device without using the micro USB? For example, is it possible to use PoE (Power over Ethernet)?
38
votes
2answers
63k views

tightvncserver - show the same screen on hdmi and vncclient

Can I start tightvncserver to show the same screen on hdmi screen and vncclient? I tried -alwaysshared, but could see no difference. Edit I want to remotely control Pi, using keyboard, mouse on ...
38
votes
5answers
114k views

Add an external antenna to a Pi 3

Makezine's writeup on the Pi 3 this morning included a somewhat tantalising section: The other interesting thing on the back of the board, right next to the wireless radio chip, is something that ...
38
votes
4answers
70k views

SSH to RPi without a network connection?

Is it possible to SSH in to an RPi without a network connection? I could imagine that you could do it using a LAN cable from the computer to the RPi or maybe using a USB cable. I do actually have ...
36
votes
3answers
14k views

Level of Hackability of raspberry pi

I have been working with embedded systems (mostly micro controllers) for about 3 years. I want to know how much of RPi of actually open source?? I know arduino gives us complete details of hardware /...
36
votes
12answers
89k views

What causes ENOSPC error when using the Raspberry Pi camera module?

I have been getting the error message below when attempting to use the Raspberry Pi camera # raspistill -o /tmp/gate_now.jpg mmal: mmal_vc_component_enable: failed to enable component: ENOSPC mmal: ...
36
votes
3answers
15k views

Alternatives to Raspberry PI

I know this question may have been asked before. I just want to know if there are any alternatives to the Raspberry Pi. I want to use it as an XMBC station, but the reviews tell me that it's a bit ...
36
votes
7answers
108k views

Does Pi3 Wi-Fi support 5 GHz and does it need an extra antenna?

I was wondering if the built-in Wi-Fi supports 5 GHz networks? Will it need an external antenna to be attached to work properly?
36
votes
5answers
30k views

Does the Raspberry Pi have Hardware Floating Point support?

There are a few articles around that say it is best to use soft float algorithms on ARM devices, because very few ARM chips have hard float coprocessors. So, does the RPi have hard float support? If ...
36
votes
5answers
14k views

What are the overclocking capabilities?

I've not ordered mine (yet!), but I do some overclocking as a hobby to the extent that my netbook, Android phone, desktop, and even my wife's Blackberry are overclocked. Is there potential to ...
36
votes
2answers
85k views

Setting up a kiosk with Chromium

I'd like to put my Raspberry Pi into a kiosk mode with Chromium directed to my website but I can't seem to figure out how to get it to work. I've been following a few different guides, and the code ...
36
votes
1answer
67k views

Pros and Cons of a Pi Cluster?

I have seen a lot of posts asking how to build a "supercomputer" or cluster with Raspberry Pis, but I have found very little with the pros and cons of actually making a network of Pis. I am interested ...
36
votes
7answers
4k views

Are there any non-Linux operating systems available?

Some variation of Linux is the de facto standard for Raspberry Pi. However, smaller, lesser known operating systems do exist and some would seem appropriate for such a small device. Are there any ...
36
votes
2answers
22k views

What is the power on state of the GPIOs?

What is the state of the GPIOs when power is applied? eg High, Low, Hi-Z? Also does any OS change the state of any GPIOs when it loads? Hopefully not.
35
votes
11answers
133k views

SSH into Raspberry Pi without knowing IP address

I have a Raspberry Pi connected to Ethernet and with a Mac (though USB cable). I'm trying to SSH in the Pi but I don't know the IP address. I have tried : ifconfig but I have I can't see eth0 lo0:...
35
votes
2answers
47k views

Power consumption of Pi Zero W?

For those who have the Pi Zero W with them, what is its power consumption in the following modes: No peripherals connected, WiFi And Bluetooth off Only WiFi turned on Only Bluetooth turned on Only ...
35
votes
4answers
28k views

What is the highest performing hardware configuration?

I know that exact benchmark numbers will vary between manufacturers, but in general if you only consider higher end flash drives, SD cards, and USB HDDs and your Raspberry Pi is connected to a network ...
35
votes
7answers
28k views

How can I run Java software?

What is the best way to run Java code on the RP? Does installing the OpenJDK from the Debian/Fedora repos work OK? Are there tweaks one should use for improved performance? Also, is there a "light ...
35
votes
14answers
69k views

Is there a serious alternative to the Raspberry Pi that includes Gigabit Ethernet?

While there are a lot of alternatives (many of them mentioned here) to the Raspberry Pi, only a few of them sport Gigabit Ethernet. But what's worse, upon a closer look none of them are a real ...
35
votes
3answers
13k views

Disable LAN9512

The LAN9512 is the hardware device which controls Ethernet and USB ports. This chip consumes almost 200mA, and it will be very useful to disable it to save energy when I don't need USB or Ethernet. ...
34
votes
5answers
170k views

How do I change/recover my password?

I have made several personal configuration changes to a Raspbian Wheezy install (more secure ssh, personal configurations, etc). It's been a couple weeks since I last touched it, and I completely ...
34
votes
1answer
84k views

What do the LEDs on the B+ mean?

Not a duplicate of this RPi.SE question, as I'll explain in a moment. GPIO.RPI_REVISION returns 3. As far as I can tell, looking at my B+, there are no LEDs labeled: OK, FDX, LNK or 10M. There are ...
34
votes
3answers
71k views

How to install unrar-nonfree?

I installed unrar-free, but I cannot extract a multi-file .rar archive (my_archive.part01.rar, my_archive.part02.rar, etc.): $ ls my_archive.part01.rar my_archive.part02.rar my_archive.part03.rar $ ...
34
votes
10answers
28k views

Can I install Windows?

I recently bought a RPi and it came with Debian, which I think is a Linux distribution. I'm more used to Windows; can I install it?
34
votes
9answers
214k views

Can you run pfsense on a Raspberry Pi 3?

Is it possible to run pfsense on a Raspberry PI 3? They have an embedded version that runs Nano BSD.
34
votes
2answers
108k views

USB card as my default Audio Device

I purchased a small USB sound card. My Pi recognizes the device: $ lsusb Bus 001 Device 004: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller If I run alsamixer and set the audio to USB ...
34
votes
4answers
40k views

What cameras can I connect to the CSI connector?

The model B comes with a MIPI Camera Serial Interface connector, but it's hard to find a store that'll sell you a chip or camera to interface with it. The only thing I've found so far is the the ...
34
votes
4answers
18k views

Using Raspberry Pi without a Linux OS?

I'm interested in using the Raspberry Pi as a pure embedded CPU unit, for the development of embedded applications. Since the Raspberry Pi has a powerful CPU with quite a bit of memory, it makes an ...
34
votes
10answers
153k views

Raspberry Pi sleep mode, how to avoid

I use "wheezy" latest release. The device provides some web service features and supposes to be active 24/7. However if the server wasn't requested for certain amount of time (it is hard to tell exact ...
34
votes
5answers
8k views

IPv6 connectivity

Is IPv6 connectivity supported on the Raspberry Pi? If yes, is it enabled by default/how do I turn it on?
34
votes
2answers
6k views

Building Wireless Drivers for Edimax Wireless USB: EW-7811UN

I've been trying on and off for days to build the module for my USB wireless device. It is an Edimax EW-7811UN I've found several resources on building modules for Debian, but none for Arch. ...
33
votes
8answers
19k views

How to shut down RPi when running headless

If I am running a Pi headless, is there a command I can use to safely shut down, or should I simply remove the power cord?
33
votes
7answers
26k views

Which model Raspberry Pi I am running?

Is there a way of determining whether the current Raspberry Pi is either a 2 Model B and 3 with Raspbian Jessie Lite 8.0? This is because I have a particular bootstrap.sh written in Bash where it ...
33
votes
5answers
71k views

Does the Raspberry Pi need a cooling system?

Searching on Newegg for "raspberry pi", the results included many heatsinks and as well as a few other types of cooling systems, yet these items do not seem to appear when looking through the stores ...
33
votes
1answer
73k views

“Resource busy” error when using `dd` to copy disk img to SD card

I've downloaded Raspbian wheezy from the Raspberry Pi downloads page and following the RPi Easy SD Card Setup wiki page. I formatted the SD card, and cded into the folder containing the Raspbian img ...
33
votes
6answers
97k views

Powering a PI from 12V

I'm thinking of installing my Pi down at my wife's stables which have a 40W solar charged 12V DC lighting circuit. Since the Pi runs at 5V I'm thinking that a quick and easy way to step down the ...
33
votes
2answers
136k views

What's the difference between the Raspberry Pi 1 Model B and B+?

I have a Model B Raspberry Pi, but what are the differences between this and the new Model B+? Also apart from the physical differences, what could I do with a B+ that I can't do with my Model B?
33
votes
4answers
44k views

How do I load a module at boot time?

As stated in Why is my Audio (Sound) Output not working?, to initialise the sound driver, you must run sudo modprobe snd_bcm2835 every time you want to output sound. How do I get this to run on boot? ...
33
votes
4answers
10k views

How free is Raspberry Pi?

Is it legal to freely manufacture, distribute and modify Raspberry Pi? Does Raspberry Pi have a license? Are the hardware documentations and specs available to the public? Are there any restrictions ...
33
votes
6answers
47k views

Recommended GUI toolkit for Python development on the Raspberry Pi

I am teaching my daughter Python (and myself to some degree) using the Pi, and we have had a great time so far - but the CLI can only take us so far. I have started looking at other toolkits, ...
33
votes
3answers
70k views

How can I use a bluetooth mouse and keyboard?

I have a spare Mac keyboard that I'd like to use with my Raspberry Pi when it's plugged into my TV, so that I can use it for surfing internet on my TV. Has anyone got a working configuration with a ...
32
votes
9answers
150k views

Writing .img file to SD Card from a Mac

I want to burn a .img file of Wheezy OS to my 8GB SD Card from Mac OS X but can't figure out how. Any help would be appreciated.
32
votes
3answers
38k views

Running Headless - checking boot screen messages

It's fairly easy now to run headless from scratch with a Raspberry Pi. One area that might have an issue though is debugging issues with devices that have been added to the Raspberry Pi. Often you ...
32
votes
7answers
117k views

Can I install Git on Raspbian?

Can I get Git on Raspbian to back-up my C/C++ files? Do I need to download anything to use Git on my Raspberry Pi? Where can I learn to use it?
32
votes
2answers
86k views

Sharing the Pi's WiFi connection through the Ethernet port

I have a pi running the latest release of raspbian and it's connected to the Internet using a wireless USB dongle. What I would like to do, is to share the pi's wifi connection so that any computer ...
32
votes
6answers
63k views

How to safely switch off the Raspberry Pi?

Usually with a desktop computer, if I run sudo shutdown -P now, the computer switches off completely and I can switch it back on again with a button. (Likewise, if the computer crashes, I can force a ...
32
votes
2answers
35k views

Why is a resistor needed for LEDs?

While looking for a basic task to get familiar with the Raspberry Pi and its GPIO pins, I decided that driving an LED sounded simple enough. While investigating how to go about this task I've noticed ...
32
votes
11answers
55k views

How to get more than one uart interface

Ok, I have one uart interface (TXD GPIO 14, RXD GPIO 15). I want at least one more uart interface. Possible solutions: Bit banging: Use two unrelated spare GPIOs. I understand that timing is a ...

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