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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I'm facing a problem while flashing the image of Raspbian stretch to my SD card

I Tried to boot Raspbian Stretch on my Raspberry pi Zero W headless. I followed the instructions as given in this link - How to Flash an SD Card for Raspberry Pi After running this Command sudo dd if=...
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No module named '_tkinter' in DEBIAN

I have some problems with tkinter. I want to use it with python 2.7.9 or python 3.4 with DEBIAN but it give me this error in both cases: Python 3.4.3 (default, Dec 1 2017, 16:25:43) [GCC 4.9.2] on ...
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A real time Spectrum analyser with pyaudio in python on Raspi [closed]

I am trying to get an fft plot on realtime audio using a USB microphone plugged into my raspi. I want to be able to activate an LED when a certain frequency is detected through the fft plot. I have so ...
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How to have a raspberry Pi automatically open up a program on boot? [duplicate]

I was wondering if their was a way for a Raspberry Pi to automatically open up a file on boot. (A scratch project)
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1answer
573 views

Raspberry PI - Apache Web server - 403 forbidden access only on some computers [closed]

Yes, I read through a lot of the related questions, but I can't seem to make sense of my problem. So, I successfully installed the latest Apache server along with PHP5 on a Pi. It works as it should, ...
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3answers
2k views

transfer files between raspberry pi-2 to pi-3 without using bluetooth [duplicate]

I have a pi-2 and a pi-3 and I am trying to transfer some files from the pi-2 to the pi-3. Is there a way besides using Bluetooth to do it?
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How to sym-link python3_dlib into cv environment in pi?

If I import cv2 into the Python3_dlib environment it can easily be found. But when I try to import dlib from the cv environment, it is giving "No module found". It may be for sym-link. But, when I was ...
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1answer
707 views

Installing Kvaser Drivers(Linuxcan) for RPI

I have been attempting to install Kvaser drivers onto a RPI 2B and have been follwing the instructions listed in the following link: https://www.kvaser.com/developer-blog/building-canlib-linuxcan-...
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1answer
2k views

Raspberry pi how to expose a port when a docker running a web server

I have the following configuration in Raspberry Pi for iptables pi@raspberrypi:~ $ sudo iptables --list Chain INPUT (policy ACCEPT) target prot opt source ...
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upgrade pi2 to pi3 without reinstalling? [duplicate]

I want to upgrade my rpi2 to a rpi3. I'm running openHabian with a zwave gateway (razberry2). Do I have to reinstall everything to be shure everything is fine or should the old setup work without ...
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w1thermsensor is not detected

I am using DS18B20 Temperature sensor on Raspberry Pi. For that I installed w1thermsensor library on my Raspberry Pi. My code is given below. import time from w1thermsensor import W1ThermSensor ...
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WiFi and Bluetooth is not found in raspberry pi 3 model b

i have raspberry pi 3 model b device in that installed raspbian OS. After installed the OS i check the blue-tooth and WiFi. while clicking the Bluetooth and WiFi it's shows Bluetooth adapter is not ...
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2answers
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How can I power my magnetic switch?

Final edit: Got it working! Thank you all for your suggestions. The first issue was that my magnet was broken. I got a multimeter and tested the switch open and closed, and the meter was detecting ...
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0answers
260 views

arecord through subprocess works randomly in raspberry pi,how to solve?

I am using arecord through subprocess to record in raspberry pi : press joystick button to start recording and press button again to stop recording, It works randomly: when I press the button, the ...
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590 views

Failed to start default.target: Operation refused unit may not be isolated

I tried to start my Raspberry this morning and I have this error message: Failed to start default.target: Operation refused, unit may not be isolated. Yet last night I plugged my raspberry for the ...
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408 views

VirtualBox image z RPI

How can I convert rpi image to: Virtualbox image i386 live CD amd64 live CD i386 install CD amd64 install CD
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934 views

Build a custom Android ROM for the Raspberry Pi? [closed]

How to create a custom Android ROM for the Raspberry Pi from scratch? It can be from any source, it does not matter (like aosp, lineage os, resurrection remix, etc), but the system apps must be ...
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3answers
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rPi2 model B v1.1 smoke comes out near power port

I am trying to control 2 motors using the E-gizmo Motor driver shield but suddenly smoke comes out near the power port of the raspberry pi 2 so I immediately unplugged the power supply. After that, I ...
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1answer
2k views

Share internet over USB

I have my Raspberry Pi 2 Model B connected to the internet via an ethernet cable. I now have a second device (It's an android phone, but that's not important) that I connect to the Raspberry Pi via ...
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337 views

Add delay to startup Watchdog on boot Raspberry

I set up the watchdog to reboot my Raspberry if : fails ping, overheating and if a file is not updated for more than 3 minutes. Now I have a problem: the watchdog start on boot of my Raspberry, but I ...
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1answer
121 views

Lost static wlan0 IP when unplug ethernet? [duplicate]

I do not know why, but when I unplug my ethernet cable, I have no more wifi connection. I use /etc/network/interfaces for configure my static IP auto lo iface lo inet loopback allow-hotplug eth0 ...
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1answer
116 views

error with imapclient library in raspberry pi

I'm getting these errors while running a program: > Traceback (most recent call last): > File "parseIMAPemail.py", line 5, in <module> from imapclient import IMAPClient File "/usr/...
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110 views

Raspberry auto reconnect with another IP

I configured the file /etc/network/interfaces with this as follows: auto eth0 allow-hotplug eth0 iface eth0 inet static address 192.168.1.111 gateway 192.168.1.254 netmask 255.255.255.0 dns-...
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1answer
464 views

Is there any way to find out which GPIO pin of raspberry pi busy?

We will get many times "Device or resource busy" error, when try to read or write GPIO pin of raspberry pi. So, Is there any way to find out which GPIO pin of raspberry pi busy? Thanks in advance.
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Kali not showing GUI when raspberry starts

When I turn on my Raspberry Pi 2 with Kali Linux, the screen is still off and does not receive any signal. But if I connect with SSH, log as root/toor, startxfce4 and reboot the screen turns on with ...
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101 views

Uninterrupted Power Supply needed for Raspberry Pi

We have designed multiple temperature sensors. its executed as well too. but we need external power supply or Uninterrupted Power supply for Rpi. I have chosen power bank ..but it works with only one ...
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2answers
2k views

function button.is_pressed from gpiozero do not work

Im working on a university project with raspberry and gpiozero. I need to manage the button response to take diferent actions. The problem is that de function button.is_pressed its always true (even ...
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1answer
650 views

Edimax EW-7811Un WiFi not working with RPi2 on cold-boot

I use a freshly installed Volumio (based on Debian) instance on a Raspberry Pi 2 Model B Rev 1.1 equipped with an Edimax EW-7811Un USB device to get WiFi. Power is supplied from a HifiBerry AMP+ sound ...
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1answer
2k views

How to install dotnet core 2 on Raspberry Pi

I followed the instructions found on https://www.databinding.net/2017/09/09/net-core-2-0-auf-dem-raspberry-pi/ sorry it's in german but the install part is: curl -sSL -o dotnet.tar.gz https://...
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1answer
542 views

Problem connecting to RPI 2 from Windows 10 Laptop with RealVNC

I recently managed to setup a Raspberry Pi 2 Model B as a VPN Server, and was using PuTTY to control the Pi via SSH during the setup. I had previously enabled RealVNC on the Pi and set up my account ...
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1answer
2k views

Install Fritz!WLAN USB Stick

I'm unsuccessfully trying to install a Fritz!WLAN USB Stick on a Raspberry Pi 2 running Raspbian Stretch. Unfortunately, I have little experience with Linux. So far, entering lsusb is giving me Bus ...
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584 views

Is there any Block diagram of BCM2837 showing GPU and CPU interface?

I was referring to the raspberry pi (I have raspberry Pi 3 Model B) boot process, where the second stage bootloader is executed on RISC core of the GPU while the CPU is still powered off. I would like ...
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1answer
150 views

RPi as a Dolby Amp?

I have bought a new Smart TV but the sound is a bit disappointing. So I was wonder if using an RPi with some sort of on board amplifier would work; either normal sound to a speaker and Dolby. Is this ...
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4answers
637 views

How to ssh between RPi 2 B and Macbook *without* ethernet or existing network?

I'm trying to SSH into a RPi from a Macbook Pro so I can run commands on the pi without hauling around an extra keyboard, monitor and mouse. I can't connect via an ethernet cable because my macbook ...
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3answers
3k views

How do I connect a Raspberry Pi to my computer using HDMI?

I have inserted my SD card and all that stuff but when I insert the HDMI into the computer it does not seem to load up, how can I make it loadup with my computer? Do I need Ethernet or something like ...
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1answer
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Overclocking GPU on raspberry pi 2 model B?

I'm trying to overclock the GPU on my raspberry pi 2, but I can't seem to find out how. Also, there's no setting for it in config.txt? Does anyone know where I might be able to find this setting (...
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1answer
783 views

Can GPIO mode be changed at once for more than one pin?

I'm currently trying to understand the pigpio library and I found it supports reading from and writing to more than one GPIO pin at once. However can it do the same with pin mode? I'm asking the ...
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1answer
196 views

Apple keyboard Caps Lock LED doesn't light up though caps *are* locked

I have an Apple keyboard (French disposition) that's always worked in all the GNU/Linux distributions I tried (Fedora, Ubuntu, Mint, Arch, Gentoo, Debian). Only with Raspbian do I have issues, the ...
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1answer
1k views

Cannot disable dhcp and set static ip

I'm currently working on a little hobby project with my Raspberry Pi 2 and I'm not sure how to proceed. I have basic knowledge of Linux but i still have much to learn. What I'm trying to accomplish ...
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1answer
262 views

something similar as jira for rpi

I have rpi model b 2. I wan't to install some kind of management solution tool (like jira). Problem is I don't know what should I choose, because rpi have too small resources. For an example, jira ...
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1answer
345 views

How to change Noobs

I'm very new when it comes to the raspberry pi as i got it as a present. It had a pre-built sd card with it, with Raspian Wheezy already installed. However i want to change it to Raspian Jessie. ...
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1answer
780 views

Control web interface on Raspberry Pi with GPIO inputs

I know that there are a lot of articles about controlling Raspberry Pi outputs via web interfaces, but there is nothing about doing the opposite. I would like to control web interfaces that runs on ...
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1answer
3k views

How to send live video frames from Raspberry Pi to my Computer

I need to send live video frames from my Raspberry Pi with a PiCamera (or USB Camera is fine too) to my Computer. From my computer, I will use the frames for Image Processing and Computer Vision using ...
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3answers
19k views

Can I power a Pi through a 5V pin?

The PIN mapping of the Raspberry 2B says: The red ones are 5V pins. Are these just used as 5V out pins when power is connected through Micro USB? Or is it also possible to power the Raspberry Pi via ...
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Trying to create an app on RPI to communicate 2 ways with server/website [closed]

I could use some advice for this project (beginner here). Situation: We have 10 or so families who need reminders to take medicine, appointments reminders etc. We would like to find a way to have ...
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2answers
689 views

File content disappears when Raspberry Pi is unplugged

I tried to create a config file on my IoT device that is used for storing content when a user changes a setting via a menu. I found that every time the content of file is changed and then the system ...
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3answers
2k views

Raspberry Pi B+ - Cannot Expand File System Screen

I bought a raspberry pi B+ model about a year ago to get into raspberry pi projects and it worked perfectly fine after installing Raspbian. I had done a project to drive a car over IP through an app, ...
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1answer
109 views

Help securing my pi

Recently I'd noticed that my pi had been running slower than usual, and some processes had been killed with the following message in /var/log/syslog: "Out of memory: Kill process score or sacrifice ...
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0answers
181 views

Sharing eth0 to eth1

The situation: Just moved into new student accommodation. With the internet access they allow you to assign 4 MAC Address of devices you wish to have Internet access on, got me thinking if sharing the ...
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1answer
55 views

Program not behaving properly after added to pi startup

I've written a small program that spins a motor throughout the day on the Raspberry Pi 2 Model B, using its GPIO pins. The program works perfectly well, and hasn't had any issues with the GPIO pins. ...

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