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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1answer
265 views

sudo apt-get installation doesn't work

Whenever I try to use sudo apt-get install, or sudo apt-get update, for that matter, I will result in an error like this: Reading package lists... Error! E: Encountered a section with no Package: ...
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1answer
721 views

Problem connecting with D-link DWM-221 LTE not work

Has anyone managed to use the D-Link DWM-221 modem? Serial interface does not appear for use by Wvdial. cat /var/log/message Dec 19 11:40:19 host kernel: [ 528.228583] usb 1-1.4: new high-speed ...
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0answers
67 views

Would a raspberry pi lifetime decrease if used 24/7? [duplicate]

the topic technically says everything, I will be using Openmediavaults image on the raspberry pi. I will be using it as a home media server(Cause I have a spare Rpi2 doing nothing.) People are saying ...
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2answers
2k views

Can I connect two Pi's through GPIO?

Say if I had one GPIO pin. Could I connect it to another pin on a different Pi and have it pick up the first pin's signal as input? Would I need to connect both Pi's ground pins to each other?
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4answers
1k views

How long will powered by 2400 mAh powerbank work?

I found a cheap powerbank (it costs about 6 $) that has power of 2400 mAh. I need it for my Switch-like Rpi console. But is this powerboank worth buying? If you need more details, check these ...
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1answer
416 views

Raspberry PI GPIO add_event_detect triggering multiple channels on one button press

Project: I am creating a light switch panel to control my LIFX WiFi lights. I have 3 buttons hooked up to GPIO pins 6, 20 and 22 and I'm using the GPIO.add_event_detect to capture when the button is ...
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1answer
64 views

RaspberryPi 2 refuses to autologin

I’m running raspbian on my RaspberryPi 2 and until yesterday it logged in automatically into pi on boot without any problem. Today it didn’t. Luckily I had already changed root’s password so now I ...
1
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1answer
291 views

Kernel Development with Raspberry Pi

I want to start working and playing with linux kernel. Instead of trying on my own system, I want to do the same on raspberry pi. I want to compile my own kernel and start working on my first kernel ...
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1answer
249 views

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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2answers
3k views

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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0answers
2k views

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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0answers
89 views

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
445 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

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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0answers
22 views

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
547 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
1k 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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1answer
1k views

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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0answers
169 views

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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3answers
2k views

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
872 views

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
226 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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0answers
480 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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1answer
357 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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0answers
800 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
2k views

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 ...
4
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1answer
1k 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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0answers
315 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
111 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
102 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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0answers
108 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
241 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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0answers
171 views

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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1answer
82 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
1k 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 ...
4
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1answer
599 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 ...
4
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1answer
1k 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
498 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
1k 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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0answers
556 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
87 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
488 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
2k 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
911 views

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 (...
2
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1answer
563 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
179 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
237 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
298 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
752 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 ...