Questions tagged [pi-2]

This refers to the quad-core Raspberry Pi 2 (currently only available as a "B" model with Ethernet and four USB ports), with 1 gigabyte of RAM.

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How to send notifications from android to RPi? [closed]

I have a project in my college, In that i need to push arrived notifications from android phone to RPi and i want to display those in the raspberry pi screen. How can i do that please somebody help.......
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1answer
71 views

Allow root to run games? [closed]

So, I wanted my pi to run a game server on boot, but since root cannot run games, I can't run the game server on boot.If somebody could tell me how to do this, it would make my life easier. When I ...
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1answer
2k views

How to measure the distance from pi NOIR CAMERA MODULE and the object

i need to measure the distance between the pi camera module and the object , i've found this formula distance to object (mm) = focal length (mm) * real height of the object (mm) * image height (...
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2answers
456 views

Count time between two pulses in nano seconds

How can i count time between two pulses in nano seconds by using raspberry pi?
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1answer
668 views

How can capture many images using picamera and loop and different name? [closed]

Here's my current Python code: import picamera with picamera.piCamera() as camera: for i in range (10): camera.capture("/home/pi/Desktop/newfile/newimage.jpg")
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1answer
278 views

How can I move my normal c++ main() function code to qt main function?

I have created small normal c++ code to test in raspberry pi which is working perfectly fine on the terminal.Now I want to write it down in qt, the problem here I am facing is I can able to move my ...
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1answer
150 views

Why does my Python scripts fail to run at boot? [duplicate]

I have a number of sensors connected to my pi 3 and i put the python scripts (7 of them) that starts the sensors at boot in the /etc/profile/ folder.. Of the 7 scripts, i noticed that only the scripts ...
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2answers
2k views

Stepper motor using L298 motor driver

I was trying to run stepper motor from my raspberry pi model 3 B. I used the following tutorial - https://www.raspberrypi.org/forums/viewtopic.php?f=49&t=55580 I have followed various other ...
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2answers
1k views

sudo command is asking user's password [closed]

I changed the default username using usermod. and now whenever I type a sudo command it requires a password. I do it only when it is the first time I type sudo. further it does not require any ...
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1answer
152 views

Android Server on Raspberry Pi

Recently, I was wondering if it was possible to run Android on a Raspberry Pi and then be able to vnc or use remote desktop apps to access its GUI.
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1answer
60 views

Why crontab choose to execute one of the command over other?

So, basically I am using wiringPI library and its sample code for ds1302 chip. It works great by the way - writing and reading to and from ds1302 chip is a breeze. I can initiate PI's date and time ...
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1answer
1k views

Is there a drone kit that connects to a raspberry pi?

I am trying to build a drone with any amount of propellers(quadcopter,single,double,octo,etc.). I am not trying to do so much work of programming it, but I do want to assemble it. I'm looking for ...
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1answer
158 views

Raspbian Wheezy config.txt overclocking

I looked on the Raspberry Pi documentation here and I was trying to overclock my Raspberry Pi 2. But on the documentation page, I found options like force-turbo and other options that I didn't find in ...
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1answer
827 views

Reading an analog signal into the raspberry pi 2

Here's the project I am working on: I would like to read in the voltage change on a sensor that I have. It has a positive and negative wire coming from it. I then have the raspberry pi 2. The positive ...
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1answer
257 views

Raspberry Pi 2 with 2 or more HDD [closed]

I want to connect more than one 2,5" Hard Drive Disk to my Raspberry Pi 2. The first question is, should it work ? The second question is, which of these is the more efficient/stable solution : ...
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2answers
225 views

Reading analog sensor value of 0-10Vdc with 12/16bit resolution

Dear all, I am using below model for reading analog value. I wanted to measure 0-10VDc &0-30Vdc .i wanted use it application where accuracy important. if i wanted to 12/16bit resolution of value ...
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1answer
334 views

RPi 2 B No wireless interfaces found - eth0: Link is down

I tried to setup a new RPi 2 Model B using NOOBS. I followed the steps the "Getting started" guide.. At the "finishing the setup" step, Pi was not able to find any wifi connections to update the ...
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1answer
43 views

Raspberry Pi 2 model B with sim800 and PIR to detect motion

I am working in the project that idea is to detect the motion using PIR and picamera. will send email alert to include with capture of the movement and SMS in the same time. the component I plan to ...
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1answer
173 views

Mobile camera as a webcam for Pi 2 via USB

How can I use a mobile camera as a webcam for my Pi 2 text recognition idea by connecting the camera to the Pi using USB?
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1answer
62 views

Raspbian sftp error. Can't log in

I have the following issue. When I try to login as the pi user with the local IP adders I get this error: ssh: connect to host 192.168.0.101 port 22: Connection refused Couldn't read packet: ...
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1answer
311 views

I use Pi for 3D printer server with repetier-server, but can't connect more than 14 printers

14 printers connected 2-usb hub to raspberry pi-2. I want 18 printers to connect one pi. But 15th printer can't install in repetier-server printer setting. How can more than 14 printers connect to pi?
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1answer
464 views

Cannot connect to Raspbian Jessie via VNC Viewer

I am unable to connect to my Raspberry Pi 2 running Raspbian Jessie via the built-in VNC Server. I got it working at home but now that I am on my university's network I am not sure what is wrong.. I ...
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2answers
3k views

RetroPie along with NOOBs

Does anyone know how to add RetroPie OS to an already installed NOOBS SD card in Raspberry Pi 2?
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1answer
37 views

system is unuseable after a few minutes

I installed openSUSE Thumbleweed on my Raspberry Pi 2. After starting the system, logging as root the console goes away after a few minutes and I got just a blinking underscore. Then the system does ...
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1answer
210 views

why console null block to rc.local starts

I'm Qt developer. i want my gui application startup when boot finish. As i see, raspberry developers start gui application from rc.local. I dont know maybe there is another way but i applied this ...
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2answers
13k views

Installing all python modules

I'm going on vacation into a foreign country and I want to take my Pi 2 with me to play a bit, not having a particular project in mind. I may not have Internet access all the time or it may be limited ...
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1answer
99 views

Error: Cannot move to subdirectory of itself ? Raspi 3

I am running this simple script and I am trying to create a cron job so that the file gets copied to my thumbdrive (with the new name) sudo cp /home/pi/NewLog.log /media/usb sleep 20 cd /media/...
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1answer
54 views

My django project is working noormally with raspberry connected to screen but when I run it with vnc viewer it returns a problem?

I used vnc viewer to use my raspberry . I have a Django project that contains an application which shows a curve it is working normally but when I run it with vnc it says application not found and the ...
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1answer
123 views

Boot up issue with SD card

I had a 16GB SD card and it got bent inside the Pi but I was able to remove it without it splitting into pieces but then it split. I also had a 32 GB SD card which failed to format and the only why ...
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1answer
257 views

Email Notification on RPi_2

I am new to Raspberry pi. I have done some simple programs on it related to GPIO and want to move forward to get my email notification on pi with some LED indications. i did surfing as well and found ...
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1answer
352 views

webiopi simple 3 wheeled robot, not functioning

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; ...
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1answer
432 views

Pi camera no preview & omxplayer fail to play

1.I have interfaced Pi-camera version1.3 with raspberry pi. Problem is I am not able to get any preview with this. Following libs are added: sudo apt-get update sudo apt-get upgrade sudo apt-get ...
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1answer
193 views

Python Face Recognizer Error

I got this error during compilation.
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1answer
240 views

Can't connect via HDMI cable after setting the touchscreen

i have been working a lot with HDMI cable and raspberry pi 2 and i was able to log into raspbian using a screen with HDMI recently i have used a touchscreen for the raspberry pi : It's a 3.5" ...
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3answers
883 views

Controlling Raspberry pi from website

I need to create asp.net website (on windows), the website should be installed on a windows computer. The website (installed on windows OS) should be able to control the raspberry pi pins(with ...
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2answers
61 views

Can the code running on Rpi1 run on Rpi2?

Can the code running on the Raspberry pi Model 1 run on the Model 2?
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1answer
111 views

What is a raspberry pi useful for? [closed]

Now I love doing a lot of reading and watch video on computer,science and electronics and next to the arduino I also heard of something called raspberry pi in most or my cse research I now it is a ...
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1answer
614 views

Does Raspberry Pi provide SDK for native iOS development (objective-c or swift) to communicate with each other?

I have a question, if we want to communicate with Raspberry PI device for either getting data or sending data on the device. For such requirement any SDK/Framework available or not. I want to get ...
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1answer
787 views

How to upload data from raspberry pi to MySQL, geting errors [closed]

Basically I am trying to upload the data collected from my raspberry pi to MySQL, I have a table called DHT_data with columns 'datetime' using data type timestamp, 'temp' using data type numeric, 'hum'...
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1answer
517 views

How can I connect this circuit (pictured below) to my raspberry pi without using the gpio headers? [closed]

I was wondering if anyone could tell me how to connect this circuit to my raspberry pi without using the gpio headers because I am trying to make a portable tablet with the raspberry pi 2 and the ...
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1answer
31 views

I'm trying to make a shell script that can mount a exFAT drive

Hi I am trying to make a shell script that can create a directory (/mnt/drive) and mount a exFAT drive in that directory on my raspberry pi 2. The problem I am having is that when I try to run the ...
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1answer
318 views

Can I connect more than one breakout board to the Raspberry pi? [closed]

I want to use Magstripe Reader, Fingerprint sensor and the NFC reader all together, Is it possible and if so it would be nice if you can reffer me where I can read how to do it, Thank you.
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3answers
874 views

How can I hide files on desktop

I have lots of stuff in one folder and I want my Desktop to be clean. Is their a way I can still have the folder that has all my stuff in but not have it on my desktop or USB. I still want to easily ...
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1answer
366 views

Pi fails apt-get upgrade

My Raspberry Pi 2 running Jessie 8 is failing apt-get upgrade. I also tried removing a package and got the same error. Here is the error addgroup: The group "input" already exists as a system group. ...
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1answer
53 views

Build source code of OS to work on pi

I have raspberry-pi 2 And i want to Build tails OS to work on it I downloaded the source code and installed cmake and gcc-arm-linux-gnueabi but i have no idea how to do that. I searched online but i ...
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1answer
62 views

Timer to Reset System

Is there a way to make it so my RPi arcade machine will reset after 5 minutes when I press a button (Restart). Can this be done with an arduino?
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1answer
50 views

how to setup micro phone to raspberry pi [closed]

i want to setup a microphone to raspberry pi and record a audio signal for 5 sec when baby starts cry. how the setup should be done? the microphone should record when baby starts crying.
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1answer
3k views

Have the GPIO pins changed between the Pi 2 and the Pi 3?

I am trying to get jtag debugging to work and I was wondering whether the pins between the Pi 2 and Pi 3 have any important differences. Because the jtag seggers device I have is connected to a ...
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1answer
110 views

Raspberry Pi component compatibility with other models [closed]

For Christmas I want to buy a Raspberry Pi 2 and a Starter Learning kit with components. I have a budget of £50 for the Raspberry Pi itself, and a budget of £35 for the kit with components. I've found ...
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1answer
44 views

what are the some useful resources to learn Raspberry pi?

I am a newbie in IoT, but have a little bit knowledge of programming languages: python, nodejs etc. Can someone point me toward some useful resources to learn Raspberry pi 2?