0
votes
0answers
2 views

Giving permissions to user for samba

I am using Samba to share a folder on a USB drive from my Raspberry Pi and it works except for the permissions. From my windows computer, I cannot write to the folder with the issue: I am following ...
0
votes
0answers
2 views

External Hard Drive does not show up in devices though it is adequately powered

when running sudo blkid and sudo fdisk -l no usb drive shows. The output from dmesg however makes it appear that the external hard drive has no issues [ 3.409324] usb 1-1.3: new high-speed USB ...
0
votes
0answers
7 views

sshd not starting after boot (embedded linux)?

I've done a minimal install using buildroot's default config for the Raspberry Pi. I also selected openssh and openssl from menuconfig: Package Selection for the target ---> [*] Networking ...
0
votes
0answers
4 views

Is there a Free way to Edit Linux Partitions in Windows [migrated]

Although, some files can be edited from Windows like cmdline.txt, most files are not visible in Windows because they are in a Linux partition. Many times one wants to edit these files without having ...
0
votes
1answer
15 views

Python as web server cgi and request response cycle

I am new to python and I am trying to design a mobile app with a web server on a raspberry pi. I decided to write the server code using python because I want to control some pins and write on the ...
0
votes
1answer
9 views

Centos and raspberry pi 2

I need to run centos 5ish. Is it possible to run this on a raspberry pi 2? As in does it have the power and ability. I can run centos on some old less powerful machines but they are noisy and big.
0
votes
0answers
6 views

Pulseaudio server playback hanging

I tried to set up an audio server on my raspberry Pi 2 using pulseaudio, however I'm experiencing multiple problems. My setup : Kali linux for raspberry Pulseaudio(+Alsa) set up as a server on the ...
1
vote
2answers
14 views

Securing GPIO groups vs gpio-admin

The project I am working on right now requires a webserver and some server side code to access the gpio pins. I know that the pins require root access and I need to secure them before I open it up to ...
0
votes
1answer
7 views

mcp adc3903 interface with Rpi

I am interfacing mcp3903 adc with Rpi for my final year project which is phasor measuremenrt unit.i found a code given below.can anyone kindly help me in understanding this
0
votes
1answer
28 views

Momentary switch as GPIO input - Trouble with code and bouncing/floating

Update So this is now the code I'm running. It now works but is bouncing/floating. - I believe this can be controlled within the code itself by looking for an edge value as opposed to a high or low, ...
0
votes
1answer
18 views

Python CGI not working correctly from web browser [on hold]

I am new to python , I am trying to write my first python-cgi program I edited the default file inside the sites-avilabe directory and here it is: <VirtualHost *:80> ServerAdmin ...
0
votes
1answer
27 views

Truncating SD image

I backed up my raspbian with dd dd id=/dev/sdb of=/home/user/raspbian-backup.img That gives me a img of the whole card (16gb). Then i followed the tutorial in raspberry.org to resize the image and ...
0
votes
1answer
16 views

How can I interface a serial GPS receiver with a Raspberry Pi?

So in India, this is the only very affordable GPS receiver I could find. It seems bizarre to me, it has a VGA port? I suppose it's used for serial communications, but there isn't any relevant ...
0
votes
0answers
18 views

Raspberry Pi and Serial Communication

Have you heard of MOXA? I have 2 Uport MOXA devices that would simulate as devices to be connected to com ports. Before this I use these 2 devices to create a program on windows that is able to send ...
0
votes
1answer
36 views

What is Mathematica For?

I recently started looking into the pre-installed programs that come with Raspbian,and I saw Mathematica. I opened it and it was some sort of terminal. My question is what is the use of this program? ...
0
votes
0answers
13 views

Add delay to video stream?

I am working on an art project where I need to use the raspberry to display its camera feed but with a five second delay, I have seen some thoughts on this using the SHELL but as I have been using a ...
0
votes
0answers
10 views

Buffer I/O error on dev sda1 - not a hardware problem

In the last month or so, one of my external hard drives has stopped working properly with my Raspberry Pi. It works for a while, then it stops working randomly. I ran 'ls' on the drive's folder and it ...
0
votes
3answers
34 views

I cannot open any ports on my router. So is there anyway that I can still use Lighttpd server to display my over web?

My ISP does not allow port forwarding and therefore I cannot open any ports on my router. So is there any way that I can still use Lighttpd server to display my database over web? I am writing a ...
0
votes
1answer
29 views

NRF24l01 Raspberry Pi and Arduino

I've been trying to make work the NRF24l01 RF module with Raspberry and Arduino, but I can't. This is the version of the module I have: NRF24l01 Module I'm trying to send the data from the Arduino, ...
1
vote
0answers
8 views

Establish PPP via serial cable

I am trying to enable PPP via USB serial cable from my laptop to my rpi. As per http://elinux.org/RPi_Serial_Connection, I have entered the following on my laptop: sudo pppd noauth proxyarp ...
-1
votes
1answer
20 views

Raspberry Pi server to avoid Packet Loss?

I currently have terrible packet loss from my home internet. The series of hops that I am routed through are awful and it ruins the quality of my internet (gaming, videos). Is it possible to set my ...
-5
votes
0answers
22 views

Do you need to control a headless Pi? [on hold]

If you need to control a headless Pi, you may find this handy: https://play.google.com/store/apps/details?id=appinventor.ai_daveyork_docs.MyPi
0
votes
1answer
17 views

When Raspberry Pi is shutdown, server send SMS to it to boot it back up

I have multiple raspberry pi compute modules that will be placed in remote locations. If any of them shutdown unexpectedly, I can't travel and reboot them. They are connected via 3G modem to the ...
0
votes
1answer
22 views

Available GPIO Pins for Transmitter

I have a touchscreen that uses the following GPIO pins on my B+: PIN NO. SYMBOL DESCRIPTION 1, 17 3.3V Power positive (3.3V power input) 2, 4 5V Power positive (5V power input) 3, 5, 7, ...
0
votes
1answer
13 views

Multiple Raspberrys for different services

I'm currently running a Raspberry Pi 2 which hosts a mailserver environment (postfix, dovecot) a webserver (apache2, owncloud, roundcube) a VPN service (openVPN) and a backup service (rsnapshot). ...
0
votes
1answer
56 views

Optimal boot time

As I'm designing an embedded product, I really need fast boot. I have: between 20 and 25 seconds with standard Raspbian Wheezy from raspberrypi.org, around 10 seconds with ArchLinuxArm ...
0
votes
1answer
34 views

Raspberry Pi multiple NFC readers

I am building a Raspberry Pi B+ powered survey device. It would use NFC scanners for multiple choice questions. It should display a question on LCD screen and the user should have his NFC tag scanned ...
1
vote
1answer
29 views

Seeing open windows via SSH and putty

I am currently using my pi2 as a face-recognition log in system, written in python, which is mounted on the wall on the other side of the room. I am trying to be able to connect to it via putty, over ...
1
vote
1answer
14 views

Raspberry kernel image installation on new SD Card (no pre installed Raspbian or Noobs in it,Its free with no partions)

I have been working on kernel compilation of raspberry on ubuntu using a cross compiler, I have compiled the kernel and I got the image file generated ...
0
votes
0answers
15 views

Bizarre SDcard MMC errors

I'm seeing strange issues on the Raspberry Pi B2. [ 85.426681] request_module: runaway loop modprobe binfmt-0000 [ 85.428508] request_module: runaway loop modprobe binfmt-0000 [ 85.449229] ...
0
votes
0answers
9 views

smbus on virtual environment [on hold]

I'm doing a robot with opencv and a pwn controller (i2c). I have opencv on a virtual environment, but I can't import smbus. Some one knows how to fix it? Thank you
2
votes
1answer
28 views

How to measure Power Supply without Extra Hardware on B+ and RPi 2

As shown in this question, for the Raspberry Pi model B, in order to measure the voltage you just connect a multimeter to the TP1 and 2 pads. How is this done on the Raspberry Pi model B+ and 2 which ...
0
votes
1answer
22 views

Vibration sensor / accelorometer capable of measuring vibrations caused by trains passing by

We live pretty close to the rail tracks, and for a long time I wanted to create a system that is capable of measuring the vibrations of the trains passing by. I tried to do it using the Sudden Motion ...
0
votes
0answers
5 views

Ubuntu on Raspberry Pi - reboot command doesn't work and console freezes [migrated]

After installing Ubuntu Mate 15.04 on RPI 2,i changed default runlevel to multi-user.target so i work on virtual console. In the beginning it works but after some time which is about 60-90 minutes ...
1
vote
0answers
31 views

Using Irdroid with a raspberry

I am new on this forum, and I hope that my question may not seem too "easy" for you. I recently purchased an Irdroid transceiver in order to turn my Raspberry Pi into to remote control for my Samsung ...
0
votes
0answers
28 views

Alarm System - Detect 2.5V or 5V

I'm a newbee in raspberry and would like to add a raspberry on my home system alarm. I have 4 zones, and checked the voltage on the four cables: 2.5V when nothing is detected and 5V when motion is ...
0
votes
1answer
20 views

OTA Update of Multiple Raspberry Pi's

I have 4 Raspberry Pi compute modules, running at different locations and I would like to run a script from the server that would connect and update the pi's with the latest version of the file found ...
0
votes
1answer
22 views

Input/output error while receiving the string from arduino via i2c

Im trying to send string data from arduino to raspberry pi via i2c. Raspberry pi can receive the data of particular length(probably32 bytes) of string since bus.read_i2c_block_data(address,0) read ...
0
votes
0answers
28 views

How do I set NTP time on my PiCamera/camera.py video feed?

I want to synchronize multiple RPIs to a single clock. For this I use a computer as the ntp server for all of them. All the RPIs now have the same time(server time). After synchronizing I want record ...
-3
votes
0answers
21 views

Can't get graphics on python [on hold]

Tried to get graphics on python 3 but the every time I tried it didn't run from the idle, I have looked in books cut and pasted and tried everyone's suggestions but each time it didn't work.
0
votes
1answer
32 views

How to run 2 servos with wiringpi2 on Raspberry pi 2

Hello I want to use 2 servo with different gpio pins. But Raspberry has one hardware pwm (GPIO 18). first of all I tried another pin to run servo and my code: wiringpi.pinMode(18,2) ...
1
vote
1answer
34 views

Is it safe to run Raspberry Pi on 900 Mhz all the time?

I've just installed Ubuntu Mate on my Raspberry Pi 2. I've selected Performance governor on cpufreq so it will run on 900 Mhz all the time. But I'm wondering is it safe for long periods like 8 - 10 ...
1
vote
3answers
32 views

RaspberryPi (Rasbian) name resolution does not work in a non-internet network

My raspberrypi (Raspberry Pi 2, Model B) has a network name (raspberrypi). I did not do any changes on the network configuration. When I connect the Pi to a network that has internet connection, I ...
3
votes
1answer
40 views

Has anyone successfully used I2C repeated starts on the PI2? My scope says they are broken

I've looked at all the info that I could find on I2C repeated starts, and I tested a simple example that uses ioctl calls with the standard two message structure required to cause a repeated start: ...
2
votes
5answers
74 views

GPIO Pin Explanation

My Pi 2 kit came with the following GPIO pin reference card. In addition to showing all of the 5V, 3.3V, GND, and GPIO pin numbers, it has additional information on some of the GPIO pins like TXD, ...
1
vote
0answers
16 views

kernel Disabling IRQ #49

I am using the RPi_GPIO library in a python shell to read a raw wireless signal using the wait_for_edge() function in a loop like so: while True: GPIO.wait_for_edge(26, GPIO.RISING) print 'R' ...
0
votes
1answer
15 views

wpa_gui no adapters

So this seems to be different than the other issues I have seen related to wpa_gui if I open it from the shortcut no adapters but if I launch it via sudo wpa_gui it will work fine. What do I need to ...
0
votes
2answers
38 views

Why is Real Time Software an Issue?

I just bought a Raspberry Pi 2 B to so I can learn more about programming. I noticed that there are a lot of questions about running real time software on the Raspberry Pi, such as this one: Is it ...
0
votes
0answers
26 views

Start Kodi when HDMI changed on Smart TV

I am trying to set an script for autostarting kodi when the TV is on (not in standby mode) or when I change to the raspberry corresponding HDMI. I found a script that should do this, but for what ...
-2
votes
0answers
14 views

Quiz with tact switches - need help

I wrote this code to my project - RPi Quiz with tact switches. import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_UP) GPIO.setup(23, GPIO.IN, ...

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