0
votes
0answers
9 views

boot up or start up of debian show screen instead of message [on hold]

I wrote your script, but it didnt do any work and i saw message again. I want to show screen(such as logo) instead of message that shows in time of boot and startup,I used plymouth but It didnt do ...
0
votes
0answers
11 views

Using python with bluetooth to communicate

I'm trying to write a simple program to communicate between the RPi and a bluetooth cellphone. I went with this tutorial: Bluetooth Python tutorial for RPi and was able to connect to the phone and ...
0
votes
0answers
18 views

Image transfer from a Raspberry Pi to an Arduino

I'm trying to transfer a image from my raspberry pi to my arduino. The image is caught on the pi periodically and then sent to the arduino which is acting as a web server. I'm also using sensors on ...
1
vote
0answers
22 views

How to get RPi to generate a triangle wave, then outputting a PWM signal

I want my Raspberry Pi B+ Model to generate a triangle wave and output a PWM signal from one of the GPIO pins, but I'm not sure how to go about doing this. All I want it to do is add some small length ...
0
votes
2answers
30 views

Power supply for raspberry pi model b+

I have a 5V/1.5 A power supply lying around. Will this be sufficient for the pi b+ model? Thanks
0
votes
0answers
6 views

I2C Gertduino + Raspberry

I am struggling to install the I2C properly. When I connect the rpi with the gertduino and set the jumpers for the atmega48p I only have two entries in the matrix from i2cdetect -y 1: 10b: UU 30b: ...
0
votes
1answer
10 views

Can the GPIO`s pins be used as another RX and TX?

I am entering the world of Raspberry PI. The reason I write, I require Raspberry connect the GSM / GPRS and GPS Fruit Adan (The 3 together) module. So far, I've only managed to connect the GPS and RPI ...
0
votes
0answers
11 views

Turning LED light on with Pi

I am looking to build a home security camera with a LED light attachment. Many people mention they use a IR Illuminator for the light source which often seem to be DC 12V. I am not sure how one would ...
1
vote
1answer
11 views

Compiling WiringPi (GPIO input) into raspistill/raspivid

I want to synchronize a stereo camera for either stills or video. The goal is the smallest possible delay between GPIO trigger input and camera shutter actuation (so that stereo is possibly in sync) ...
0
votes
0answers
11 views

only got 56mb left on 8gb card after RetroPie install

I have a formatted 8gb sd card (7.1gb available) and I've tried multiple times to install the roughly 4gb in size RetroPie disk image. Each time I do, it says I have 55.9mb left and says it becomes ...
0
votes
0answers
8 views

PWM to control brightness on i2c LED backpack?

I have something similar to this, it works, but it's too bright! I am aware that LED brightness can be controlled by pulse width modulation, but I don't know if I can safely do that with an LED ...
1
vote
0answers
10 views

Is it normal to irssi freezes when receiving dcc?

I'm running it over screen with Raspberry Pi Model B, but when a streaming begins, I am unable to type anything, even Alt + Arrow doesn't work, but changing screen's window with Ctrl+A + # works, so, ...
0
votes
0answers
15 views

Is it possible to create an os image from a configured and running one?

I want to create a customed operating system image from an existing one.
0
votes
0answers
10 views

Raspberry Pi Wi-Fi setup with mobile app

My use case involves a Raspberry Pi and an embedded application that requires Wi-Fi internet access. I want to be able to carry the Raspberry Pi around and quickly set up the Wi-Fi access for each ...
0
votes
0answers
19 views

Authenticate Motion video stream via Apache web server on my PI

At the moment I'm running two PIs with the popular software Motion, delivering webcam content to the internet. I'm port mapping the two external ports to the internal ports on my router, to give ...
0
votes
2answers
16 views

Can I use the output of one pin as VCC?

For a project I have to use a voltage level shifter. On both sides of this shifter I have to specify the target voltage. Thus my idea was to simply set one pin on high (3.3 V) and use that as VCC on ...
0
votes
1answer
19 views

Connecting a Long Stem Thermometer to a Raspberry Pi to automate the recording of temperature in an experiment

Is there a way to connect and read the output of a long stem thermometer like this one to a raspberry pi?
1
vote
1answer
12 views

cec-client works when run from cli but not from cron

So when I run either of the following from the cli (SSH session) my pi will turn on my Samsung TV: echo "as" | cec-client -s echo "on 0" | cec-client -s However when I but either of these into cron ...
0
votes
0answers
22 views

TFT 2.4 blank screen

I purchased a Tontec 2.4 TFT on dealextreme, with the adapter. I connected it to the raspberry like this: After following step by step the instructions (from here: Instructions) My screen is ...
0
votes
1answer
10 views

How do I get my raspbmc to open a stream (such as mmc) on startup?

I want to put my Raspberry Pi upstairs and connect it to the network via Homeplug. On my main computer, I would like to play music via VLC using something like the MMC protocol. What do I need to do ...
0
votes
0answers
6 views

Interfacing Raspberry pi and RFID

i want to install an rfid reader on raspberry pi, and based on the id of the tag present, make a call to a sever and then present the information on a screen. i was thinking along the lines of ...
0
votes
0answers
11 views

What dose it mean when my raspberry's boot screen says: "[FAIL] startpar : service(s) returned failure : hostname.sh … failed!

What dose it mean when my raspberry Pi model B+'s boot screen says: "[FAIL] startpar : service(s) returned failure : hostname.sh ... failed!
0
votes
1answer
33 views

Noob here, how can I rig up a button to the GPIO, and set it so that it will trigger a key press?

I'm quite new to the GPIO portion of the raspberry pi, and I am wondering how to rig up something that will detect button presses. I have a model b+ (40 pin). Which pins do I wire it to? How do I even ...
0
votes
0answers
15 views

Circuit advice for GPIO

I want to use the Raspberry Pi GPIO to control four mechanical relays. Since the output of the GPIO doesn't produce enough current to run the relays, I have devised a cicuit using transistors to ...
-1
votes
2answers
46 views

Lamp or language best for raspberry pi

I know this is a beginner question or may be even a stupid one, I am new to this whole concept of raspberry pi, so please excuse me if this is naive. Just beginning to tinker with raspberry pi and ...
0
votes
0answers
10 views

rPi B+ hardware watchdog timer monitoring java application

I have rPi B+ with ArchLinux and some java application running on it. Now, I do NOT have source code for this java app and java app hangs up from time to time. Is it possible to use rPi B+ (its ...
0
votes
1answer
12 views

Why is netatalk not updated?

I am trying to set up a OS X networking environment with a raspberry pi and again have to build netatalk 3.1.6. Why is it now updated on the repository? Will it ever be? Thanks!
1
vote
0answers
15 views

Tor Proxy (gateway) with Raspberry Pi

So I followed the tutorial on AdaFruit to make a Tor proxy with the Raspberry Pi. I got it working as a router and I can connect to it fine with another computer. Hostapd and DHCP server are always ...
1
vote
1answer
16 views

Activate RPI-cam with rfid signal

Can anyone give me some advice on the next. Is it possible to activate the RPI-cam with a signal from a rfid reader? Here's the practical enviroment. I am a pigeon fancier and my pigeons are ...
0
votes
0answers
19 views

RTL8192CU-based WiFi dongle is only able to scan

For the last few weeks I've been trying to get the TP-LINK TL-WN8200ND working on the Raspberry PI running the latest Raspbian image. This WiFi adapter uses the Realtek RTL8192CU chipset. The ...
0
votes
0answers
27 views

RPi B+ not booting and green led flashes 4 times,with 4 different micro sd

My RPi B+ stopped booting suddenly after 1month working. I try 4 different usd cards and for all of them act (green) led flashes 4 time and no video and no power on usb ports and ethernet. I know it ...
2
votes
1answer
32 views

Optimal gpu_mem_512 split for headless server

I own a Raspberry PI model B with 512MB of RAM. I am not running any graphical application on it. It just run a few services and when I need to administer it I do that via SSH. I see that my ...
0
votes
0answers
10 views

Using I2S/PCM on the P5 header

I am trying to get audio capture through a custom codec board that is using I2S to communicate the audio data. I'm having trouble finding support for using I2S. There was a lead here although the ...
0
votes
0answers
6 views

RetroPie - Upgraded binaries, now I have a black screen ! Can still SSH into it

I got the Pi yesterday, and have been playing around getting RetroPie set up for way longer than it should probably take... This evening I've updated the Binaries, and that led to this error message ...
0
votes
1answer
9 views

pyspi and file descriptors

Has anyone else noticed that py-spidev seems to leave a file descriptor open? When I run lsof -p 5833 I see that my program has 5 file descriptors open, which seems fine. When I run sudo lsof -p 5833 ...
0
votes
1answer
30 views

Precautions to be taken while using the GPIO pins

As a newbie to the Raspberry Pi and electronics in general, I would like to start hacking around with the GPIO pins but any tutorial around the Internet warn me about frying the Pi one way or the ...
0
votes
0answers
4 views

shell script: time difference [migrated]

This is my script to count the time difference between now and my date. Is there any other way to do the same operation more efficiently? #!/bin/bash mydate=20141224 # yyyymmdd mytime=00:00:00 ...
0
votes
2answers
26 views

Will attaching an Adafruit TFT consume/block all the GPIO pins

I'm thinking of picking up this TFT screen for my pi, and can't quite figure out from the images, if it's going to require use of all/some of the GPIO pins on the board, and whether they'll still be ...
0
votes
0answers
15 views

Run java program from SD card

So I am completelly new in the raspberry pi world... I would like to copy a file (a .java file)from my pc to my raspberry pi... Which is the best way to do so? Thank you!
0
votes
1answer
33 views

static sound when recording with USB sound card mic/input on a B+

I have a Raspberry Pi B+ model and I am using a USB sound card to record audio. The problem is that I am only getting static and loud humming when recording, with nothing else actually recorded. I am ...
0
votes
1answer
34 views

Does anybody else experience micro-freezes with the Raspberry over wifi?

whenever I connect my Raspberry Pi over wifi to the LAN, I sometimes get micro-freezes when streaming video from the Raspberry or when I connect over ssh. It seems kinda periodic. The freeze/lag has a ...
1
vote
1answer
21 views

Webcam capture into mp4 or mov (ffmpeg is very slow at this)

I'm using ffmpeg on my Raspberry Pi (running on Raspbian) to record a 5 seconds long video at 12 fps from my webcam. It's not the Raspberry Pi dedicated webcam, just a regular USB one. This is the ...
1
vote
1answer
33 views

all raspberry pis connected to same breaker box are having their inputs pulled high or low randomly

I work as a tech guy for an agriculture/tourism farm. I have set up about 60 or so raspberry pis throughout the farm to control lights/props/sound effects/music/video. They are amazing and I have ...
1
vote
1answer
22 views

How to drive nitinol (flexinol, muscle wire) through RPi

Is it possible to actuate muscle wire through Raspberry Pi ? This product expects ~200mA to revert to its original shape. If so, how would the circuit look like ? What resistors should I hookup ? ...
0
votes
0answers
28 views

Fast OS for embedded system

I'm creating a project with raspberry pi and I need an "os" which boots in a few seconds when the power is turned on. The os has to have the following features: audio driver (3.5mm) c/c++ running ...
0
votes
2answers
30 views

sleep() affecting only one certain output

the topic name might seem a bit chaotic, but I'm struggling to describe in one line what I mean. I want to create a python script that plays different sounds when certain button is pressed. So far I ...
0
votes
0answers
8 views

Arch - netctl - how reconnnect to wireless network automaticly

So, I have netctl WiFi configuration working with Arch Linux on RPI. How can I make sure that it reconnects to network if connection drops for any reason, like losing signal?
0
votes
1answer
4 views

Headers to connect xtrinsic sensor board

I have both (pi and board) as illustrated here. However, both boards have pins. Neither have the female ends for the connection. What kind of headers do i need? Are there female - female available? I ...
0
votes
0answers
10 views

connect 3g dongle with Huawei E353tu

I am using the sakis3g software to connect my rpi to the internet. Normally it works fine. But not every time.I am using an self powered USB hub and I have a rpi b+ using wheezy. The 3G dongle I use ...
0
votes
0answers
25 views

Using GPIO pins for both touch screen and other GPIO operations at the same time

I would like to use a touch screen like this. As this is interfaced with GPIO pins, is it possible to use a ribbon cable and take out the pins onto a breadboard and use it for both touch screen and ...

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