27
votes
How to start Motion in daemon mode on RPi running Raspbian Jessie
To enable motion to run as a daemon on startup do the following:
Edit /etc/default/motion
and change start_motion_daemon=no to start_motion_daemon=yes
Next enable motion by entering the following ...
- 34.6k
21
votes
Accepted
What does each of the default groups on the raspberry pi do?
I did a little digging on this and tracked down the purpose for most of the user groups:
pi User-specific group. A group is automatically created for
each new user; you can ignore this....
- 326
20
votes
Do all GPIO pins have a internal pull-up/pull-down resistors?
Yes, all of the B+'s GPIO pins have internal pull-up or pull-down resistors that can be controlled from your code.
Pull-up is 50K min – 65K max.
Pull-down is 50K min – 60K max.
More info on the GPIO ...
- 34.6k
18
votes
What is the difference between Model B+ v1.2 and Model 2B v1.1
The B+ had a single core Broadcom BCM2835 Arm 6, with 512MB of RAM.
the Raspberry Pi 2 (is newer) has a quad core BCM2836 Arm 7, with 1GB of RAM. As a result of the quad core CPU the Raspberry Pi 2 ...
- 34.6k
15
votes
Accepted
alsa-base conf file missing
Turns out the file is now called alsa.conf and is found in /usr/share/alsa.
Changed the lines
defaults.ctl.card 0
defaults.pcm.card 0
to card 1 and that's me up and running. Looks like others have ...
- 383
14
votes
Accepted
The purpose of the orange tape on the HDMI connector
I believe the tape is useful for manufacturing using a vacuum based pick and place machine. The machine can't pick the parts up if they're full of holes. Removing it shouldn't do any harm.
- 10.7k
11
votes
Is this idle temperature normal for the RPi 3?
I have eight pi3s in a room which is 22-24°C. They range in temperature between ~45°C and ~50°C when idle, with each pi being fairly consistent in temperature +-2°C (sorry, not terribly accurate ...
- 606
8
votes
Accepted
Pi Wordpress asks for ftp credidentials
This should be able to be fixed by either providing the FTP credentials in your wp-config.php file (in the root directory of the Wordpress install) or by changing ownership of the Wordpress install. I ...
- 96
6
votes
What is the difference between Model B+ v1.2 and Model 2B v1.1
The Pi2 has four cores, see https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
The B+ (like all the other Pis apart from the Pi2) has a single core, see https://www.raspberrypi.org/products/...
- 70.5k
6
votes
What is the difference between Model B+ v1.2 and Model 2B v1.1
If more is better the Pi2 clearly wins. Double size of RAM (1 GB vs. 512 MB) could make the difference for demanding applications.
The Pi2's quad-core CPU @ 900 MHz vs. single-core CPU @ 700 MHz, ...
- 15.8k
6
votes
Accepted
Switch from RPi 2 to RPi B+
Presuming you are referring to Raspbian, the same SD card should work unless you have removed kernel.img from the boot partition and/or corresponding directories from /lib/modules.
If you are ...
- 58.5k
6
votes
Accepted
Raspberry Pi will not boot after configuring it
Your problem is probably due to the fact that you pulled the plug on the RPi while it was busy doing something important. In general, it's a bad idea to pull the plug on any computer, including the ...
- 11.9k
6
votes
Is this idle temperature normal for the RPi 3?
I have a RPI3 with a mini heatsink, like the following image:
Both heat sinks (14x14x11 mm and 9x9x12 mm) are made of aluminium and the fan is a SEPA MF15B-05 (15x15x5mm, 5V-0.06A) that is soldered ...
- 161
5
votes
Accepted
Vagrant on Raspberry Pi
No, not really. It's theoretically possible to emulate x86 code on an ARM machine using some form of virtualization, but the Raspberry Pi is not powerful enough to do it functionally.
- 11.9k
5
votes
Centos 7 on pi b+
I have downloaded most of centos 7 img from : http://mirror.centos.org/altarch/7/isos/i386/
That will not work. "i386" refers to the Intel 80386 instruction set architecture (ISA). This was the ...
- 58.5k
5
votes
Accepted
Pi locking up trying to use rising/falling edge detection
Solution:
Add:
dtoverlay=gpio-no-irq
to /boot/config.txt.
Previously the kernel would automatically disable interrupts when you set one of rising/falling edge detection methods but that apparently ...
- 195
4
votes
DS18B20 no longer working
I'm posting this as it's the answer I got to but all credit is due to the commenter @Joan!
/etc/modules empty.
/boot/config.txt does not have device_tree=, thus enabling device tree. It does not ...
- 353
4
votes
Accepted
World Record Raspberry Pi
As of the time of this writing, there are no Guinness World Records related to the Raspberry Pi. There are a few about Linux in general, but I was unable to find anything that contained raspberry pi ...
- 11.9k
4
votes
Raspberry Pi will not boot after configuring it
It sounds like it could be an issue with your SD card. The size discrepancy in Windows is expected because of how the Raspberry Pi OS formats the SD card (most of it isn't visible to Windows). The ...
- 310
4
votes
Flow meter Raspberry circuit and problem receiving pulses
Searching the Internet I found this circuit for a flow meter. I don't know very much about electronics. How about it?
Red ------------- 5V
+----- 3V3
|
10K
...
- 101
4
votes
Accepted
What is the purpose of Raspberry Pi3 B+ 4 POE pins?
The Raspberry Pi foundation plans to release a PoE HAT, which will be an add-on board to be stacked on top of the Raspberry Pi. That HAT will transform the rather high PoE voltage into the 5V the ...
- 6,215
4
votes
Accepted
GPS (USB) with NTP has a consistantly large offset and high jitter from public NTP sources
So...a couple of things. Firstly, "why" you need the PPS...
Let's back up a bit. In the ancient world of the 1970s and 1980s, when one spoke of "the system clock" or of a system's &...
- 66
3
votes
Accepted
Can Raspberry Pi B+ run Kodi efficiently?
I've had various flavours of pi tucked behind my tv running kodi for years now, upgrading whenever a new model turns up. The biggest differences you're likely to notice moving between the pi A/B -> A+/...
- 10.7k
3
votes
Can Raspberry Pi B+ run Kodi efficiently?
I have Kodi running (as part of OpenELEC) on a Raspberry Pi model B (not the +) and it does just fine, including playing Blue-Ray videos over the network. So the answer is: yes, it will run fine - ...
- 5,033
3
votes
Accepted
What version of Android can work with decent performance with Raspberry Pi Model B+?
Straight to the point: none.
You can get maybe half-decent performance with Razdroid AKA CyanogenMod that's been ported to the first generation Pis (B+, B, A+, etc.). Usable, but not decent at all (...
- 7,116
3
votes
Accepted
Under powered Raspberry Pi B+
Phone power supplies are not as reliable as dedicated switching power supplies. You can buy a switching power supply for the rPi for very little money (this one for example). A powered hub might work, ...
- 5,033
3
votes
Accepted
Using an L293D chip (to control a motor) with a separate power supply
It's always worth double checking the connections if a circuit doesn't work.
Remember that you also need to connect a Pi ground to an external device you want to control from a Pi GPIO. WIthout the ...
- 70.5k
3
votes
How to start Motion in daemon mode on RPi running Raspbian Jessie
Confirmed for stretch (v9) as well.
you can also use
$ ps -ef | grep motion
to see if motion is running
- 91
3
votes
Make the raspberry Pi speak its dynamic IP address
Have you tried using http://www.noip.com/ 's dynamic vpn service? Just install noip2 on your pi, follow the instructions on the website, forward port 22 on your router, and voila you have a domain ...
- 123
3
votes
Getting NMEA string from GPS module to your Raspberry PI B+
You don't mention which GPS module you have, so I can not provide a definitive yes, but given the right GPS module it is possible using the UART (tx/rx pins). Another alternative depending on your ...
- 34.6k
Only top scored, non community-wiki answers of a minimum length are eligible