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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RPi 2: Could not communicate with wpa-supplicant

Like the title, I updated the Raspbian from Jessie to Buster, and when I restarted my Pi 2 Model B, wlan0 suddenly not associated, I noticed that could be my Wifi dongle problem. But when I get to ...
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Printer keeps printing the same document

I have an HP OfficeJet 8710 printer installed on my Raspberry Pi 4b on Ubuntu 19.10.1. Documents sent to the printer keep reprinting until I cancel them with cups on localhost:631. The same networked ...
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2answers
35 views

Multiple Wifi networks - can't connect with VNC

I'm using a Raspberry Pi 2 Model B with a wireless USB adapter, Raspbian jessie. Until today I only had the raspy connected to my home network, everything was fine. Now I have the necessity to bring ...
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28 views

Loopback SPI interface not working

I'm trying to do the loopback test for the SPI interface on my raspberrypi model 2 B V1.1, by following the intruction on this website : https://www.raspberrypi.org/documentation/hardware/raspberrypi/...
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PIVPN with Wireguards - Hide IP

i have a question: i installed PIVPN with Wireguard protocol. From my mobile phone, my endpoint is the my ip public and with a specific port, I reach out my VPN. Perfect! My data are encrypted between ...
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51 views

Having problems with ethernet on my PI2 running raspbian buster lite

first of all let me say I'm a beginner so assume I don't know anything. Okay, now my problem. I'm trying to set up my old PI2 to be a terraria server to play with some friends. Everything was working ...
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2answers
70 views

hostapd AP over both wlan0 and eth1

My hardware setup is currently: Router -> RPi (eth0) -> RPi (wlan0) -> subnet for my devices My desired setup is: Router -> RPi (eth0) -> RPi (wlan0 + eth1) -> subnet for my ...
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1answer
17 views

Can I run latest NOOBS on a Pi 2?

Can i run the current version of NOOBS on a Raspberry Pi-2? I have tried but it will not boot up.
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51 views

Protecting my Pi's GPIO pins when off

I have a Raspberry Pi 2 Model B and I am wondering if there is a pre-made solution, if I have to make it myself, or if it isn't an issue. For my project, the GPIO pins will be in constant use as ...
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1answer
69 views

Help with setting static ip

/etc/Interfaces auto lo iface lo inet loopback iface eth0 inet static address 192.168.205.159 netmask 255.255.255.0 gateway 192.168.0.1 allow-hotplug wlan0 iface wlan0 inet manual wpa-roam /etc/...
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2answers
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Is there a conflict between raspbian/raspberrypi versions and python versions?

Can some version of python not run on some version of Raspbian? Is there some thing in the architecture of some version of Raspberry Pi that could make them incompatible with some versions of python?
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Raspberry pi 2b not booting after SD card was ejected while working

So, like the title says: My Raspberry pi 2b is not booting after the card was ejected while working. I was watching some Kodi media, then it froze, I realized that the SD Card was ejected (there is a ...
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35 views

How to emulate the u-boot with raspi2 on QEMU

By referred https://www.raspberrypi.org/documentation/configuration/boot_folder.md and What is the boot sequence? I am trying to run u-boot by emulating Raspberry pi 2 on QEMU. I followed https://...
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ALSA lib bluealsa-pcm.c:219:(io_thread) PCM FIFO write error: Broken pipe aplay: pcm_write:2053: write error: No such device

Bluetooth Error Device: Rpi 2 2014 Model B Ver 1.1 also Rpi 3 Bluetooth Headset JBL Everest Elite 750NC Bluetooth Adapter Panda Wireless PBU20 command line: aplay -D bluealsa:DEV=C8:DF:84:20:...
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1answer
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Troubleshooting my project xorg error. Services not booting

My /etc/X11/xorg.conf is empty i did have a 99-calibration.conf I put in /etc/X11/xorg.conf.d/ but I had to make the xorg.conf.d/ dir so i migth have already messed up before. Now starting the pi ...
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Is it possible to access an Android Phone's volume permission and control it with RaspberryPi?

I want to have a wireless network using RaspberryPi where it connects with an Android phone, accesses its volume permission and turns it down. Any inputs on how to go about this?
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1answer
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writing into fifo file and reading it

1.Transmitter side code: A)Recording audio into fifo file(no need to create fifo file separately arecord command will create fifo file): import os os.system('arecord -D plughw:1,0 -d 0 --rate=19200 ...
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Can a voltage at a GPIO pin with no mode set harm the pi

I have a Raspberry Pi 2 Model B, and I plan on using the GPIO pins to detect whether a voltage is present or not. However, the circuit that controls the voltage levels runs independently from the pi, ...
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25 views

polling gpio raspberry 2 doesn't work

i'm writing a library for my raspberry pi 2 for gpio control. I'm trying to test a function for read a gpio driven by interrupts with sysfs but i can't do that my function stops in poll() function. ...
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1answer
96 views

TFMini Plus LiDAR not working

I'm trying to work with a Benewake TFMini Plus Lidar sensor in a RaspberryPi. I'm using a USB-2-TTL serial adaptor, which is working properly according to the tests I've ran. I'm testing the sensor ...
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2answers
59 views

Issues running Kivy and Flask together on Raspberry Pi 2 with touchscreen

Setup Kivy 1.11.1 Flask 1.1.1 Python 2.7.13 Issue I have an issue running together a Kivy app and Flask as thread on a RPi2 with a touchscreen. It is similar to the issue mentioned in this post ...
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1answer
68 views

Unable to reset password on Raspberry Pi (Raspbian Jessie)

I'm trying to follow the directions in https://howtoraspberrypi.com/recover-password-raspberry-pi/. (For future reference in case that tutorial disappears, here is the steps up to the point which I ...
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27 views

Raspberry pi wireless WiFi

So I had an idea and wanted to know if it was possible and how to tackle it. So I was thinking if I had a raspberry pi plugged into my router at home via Ethernet cable, could I create some sort of ...
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bridge repeater unsure what to call it

ok here is the set up router 1 ~~ pi ~~ router 2 ~~~ rest of the home router 1= public wifi (aka library) i need the rpi to pick the signal up using a [Alfa Long-Range Dual-Band AC1200 Wireless ...
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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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Use Raspberry Pi 4B as wifi access point and wifi client at same time to function as an extender/repeater [duplicate]

Looked at older threads and found that none of them were working properly and was hoping for an updated tutorial. My main issue is that my Model 3 won't connect to a certain wifi network, and was ...
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1answer
66 views

OnionPi - No internet connection after adding Iptables rules

I need some help or advices since I've not know what could I do to fix this issue. I've built an onion pi following the adafruit tutorial. This basicly is a wifi hotspot that routes all traffic ...
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1answer
162 views

Wireless USB Adapter not working on Raspberry Pi 2

I am trying to install a Wireless USB Adapter but Raspbian can't detect it. tp-link TL-WN725N | Raspbian 10.1 | Raspberry Pi 2 Model B I think the drivers were installed correctly, but I just ...
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1answer
68 views

Pi 2B won't update TeamViewer

I've recently tried to log into my Raspberry Pi (2B with 1GB running Jessie) using TeamViewer and found that my TV software is out of date. I needed to update TV to version 14. When I downloaded ...
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176 views

cannot update after adding new source

I am running a raspberry Pi 2B (with GUI disabled) and I added deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi to my sources.list. After this, I ran sudo apt-get update ...
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1answer
50 views

Remotely Connect to Pi through VNC Outside of LAN Network

I want to be able to remotely access the desktop of my Raspberry Pi 2, running Rasbian Full, from outside of my LAN network. I've been able to easily connect on my network, but I want to be able to ...
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689 views

Pi-Hole: How to change DNS via command

I use Pi-Hole on my Raspberry Pi 2. It's very easy to change the Pi-Hole DNS using the Web Interface Settings. But how can I change my Pi-Hole DNS via command in my raspberry pi console? (Raspbian) ...
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1answer
74 views

Sites unavailable ('Network unreachable') but pings work fine [closed]

I have a Raspberry Pi 2 Model B running Raspbian Buster (upgraded from Stretch). I don't use it very often, but recently I noticed that I can't do apt update because all the repos are unreachable (...
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53 views

Can't Install Raspbian Because SD Card Shrunk

I have an 8 GB Kingston SD card that I'm using. I formatted the card with the formatter from sdcard.org and it kept its file size after format. I downloaded the NOOBS 3.2.1 file from RaspberryPi's ...
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2answers
37 views

How to run a raspberry pi program without connected to a desktop screen

I want to be able to run a raspberry pi program without being connected to a desktop screen so the whole idea is to make an object tracking robot using raspberry pi and a camera. This should be able ...
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83 views

Running a mongodb server on Raspberry pi 4 [duplicate]

I am trying to run a MongoDB server with a node.js server and express on a Raspberry Pi 4. I have installed the MongoDB server using sudo apt-get install mongodb. When I try to start the node server I ...
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1answer
61 views

Possible to stream live-video with (almost) zero-lag using RPi 2B accessible via browser?

I'm an apprentice for becoming an IT specialist. My colleagues and me are trying to set up a Raspberry Pi in order to stream live video in 720p with (near to) zero-lag which has to be accessible via ...
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1answer
63 views

DHCP configuration in systemd

Currently, I have configured access point using hostapd and using systemd for configure the network ap0 (access point device). the access point configured automatically to use DHCP server. my ...
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3answers
1k views

PiHole not resolving local DNS entries

I have a piHole set up on my network with address 192.168.2.10 My router is 192.168.2.1 and the DNS settings on the router point to 192.168.2.10 meaning all traffic that goes via the router (which is ...
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25 views

Can PiVPN ping the client first to establish VPN connection?

I am trying to setup a PiVPN on my home network. I installed it on my Raspberry Pi 2B and the server seems to be working fine on the Pi. But if I try to login from my phone, I get the 'Server Poll ...
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1answer
27 views

Does a hat designed for RPi 2 B still work on Rpi4 (GPIO compatbility)?

I'm now continuing the design of a PCB (Pi Hat) that I started with a RPi 2 Model B. Will a RPi4 accept this hat? TL;DR: Does a RPi4 accept a Pi Hat designed for RPi 2 B? Or is there a break in ...
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1answer
59 views

Routing traffic with 2 VPN Gateways on RaspberryPi

I'm using Raspberry Pi to run OpenVPN client. I have 2 client connectios set up, using interfaces tun0 tun1 The raspberry pi uses interface eth0 to connect to the internet. Then I have USB ...
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76 views

Raspbi spi CS line won't drive low

Raspberry pi 2 Model B V1.1 Not sure what's happening here, everything should work. Tried different cables, different pins on the analyzer, different laptop... the CE0 line won't go low. Currently ...
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24 views

Resistor breakdown - Raspberry pi 2 Model B Version 1.1

on my raspberry pi 2 model b v 1.1 there is a shorted resistor with a name tag R37. I cannot find a circuit diagram for this particular version of raspberry, so I do not know which SM resistor to buy. ...
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3answers
91 views

SSH Connection refused, even though the openssh-server daemon is running

I did a fresh installation of Ubuntu Mate on my Raspberry Pi 2. Installed openssh-server (in fact it was already installed), and changed the port to be 10022. However, I cannot access the Pi, from ...
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2answers
33 views

Connections to my Raspberry PI SSH hang after a while

I have a Raspberry Pi 2 B connected on the network with a static IP. After a fresh reboot, I can connect to it smoothly and it just works: ssh -A <ip> -p <port>. But after, let's say one ...
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2answers
511 views

Is the 3.5mm audio jack tied to a GPIO pin?

I have a Raspberry Pi 2 B+ and I would like to confirm that the 3.5mm jack isn't tied to a GPIO pin. I could not find any information on this and thought this may be the case but I wanted to double ...
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0answers
25 views

Raspberry Pi 2b won't produce HDMI output, both LED's on

I have a Rasberry Pi 2b running raspian. It was previously working, however whenever I try to turn it on both LEDs come on prmenantly but nothing is outputted on HDMI. My TV does change from saying ...
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2answers
130 views

What are the differences in architecture of Model 2 and Model 3B+? (SD card not working in model 3B+)

I have two raspberries (model 2 and model 3B+) and two sd cards. I wanted to swap the cards. The card from model 2 is not recognised in model 3B+. There is no green LED which indicates that the ...
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1answer
91 views

Pigpio on callback get value

I currently have some code that I found that constantly outputs a value from a digital caliper. However, I want to modify this so that it is inside a function that can return that is returned from ...

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