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.

Filter by
Sorted by
Tagged with
1
vote
1answer
35 views

share ethernet connexion to ethernet usb adaptor thanks to raspberry pi

I try to connect my ps4 with my vpn connexion without using the computer. I install the vpn on a raspberry pi 2 and i connect my raspberry to internet by the ethernet connexion. I use the raspberry ...
2
votes
2answers
56 views

My RPi2 became very slow suddenly

I am running Raspbian on my RPi2 and on top of that a Node.js server. This morning the Node.js server went down, but I still have access to the SSH terminal. I ran top but couldn't see any processes ...
1
vote
0answers
15 views

Omxplayer set_alpha not working

I’m using python wrapper of omxplayer, and seems if I try to set an alpha value the player does not set anything. This just work if I try to launch the player in -win mode. I’d like to do a cross ...
0
votes
0answers
17 views

Raspberry Pi 2 Model B v1.1 alsa & jackd Headphone Jack Configuration

My end goal is to do headless remote audio streaming with jacktrip on some older Pi 2 boards using the built-in headphone jack (I know the quality of it is lacking but I don't really care). To narrow ...
0
votes
1answer
22 views

Can only initiate ssh ethernet connection to Pi when PC is off WiFi

I can seemingly only connect to my Pi via an ethernet cable if I have temporarily disconnected from WiFi. Once I login, I can reconnect to Wifi, and I can talk to both my Pi and use the internet. ...
1
vote
2answers
64 views

SenseAir S8 LP not transmitting data

I bought a SenseAir S8 LP to connect to a Raspberry Pi 2. The specification[1] shows the pins and how I should connect them. I have verified that the pins are connected properly (see image below). As ...
0
votes
1answer
23 views

Broadcasting With PiFm Isn't Working on My Pi 3A+

I am trying to broadcast audio from my raspberry pi with pifm. However, it isn't working. When I run 'sudo ./pifm sound.wav 100.0' nothing comes through on my fm radio, and also, afer about 2 or 3 ...
0
votes
1answer
22 views

Broadcasting From An USB Sound Card With PiFmRds Isn't Working

I am using PiFmRds on my raspberry pi 3a+ (https://github.com/ChristopheJacquet/PiFmRds), and I am trying to live broadcast with a mic and a USB sound card. The command is: sudo arecord -fS16_LE -r ...
0
votes
0answers
23 views

Raspberry Pi I2S duplex audio setup

I'm using a Raspberry pi 2b+ for an audio project where I need stereo in and out at the same time. I've had success with cheap USB interfaces but they have a lot of noise and are prone to dropouts. My ...
0
votes
0answers
18 views

Pi2 as an USB-Switch to share his eth-connection

I want to share my thoughts and questions about using a Raspberry Pi as an alternate Switch/Router or whatever. First my problem is, I have 3 stationary PCs, all of them are connected to a switch (eth)...
0
votes
0answers
20 views

RaspberryPi 2 can not be restarted (sdhost-bcm2835 timeouts, print_req_error)

I have a relatively simple setup: One Raspberry Pi 2 is directly connected to my home router, running Debian 10 and PiHole with an Unbound rDNS service. That's it. I have set this system up two times ...
1
vote
0answers
12 views

kiosk mode buster lite Pi Br2

I am trying to view my Octopi PiCam on a PiB2. I followed the guide here: https://die-antwort.eu/techblog/2017-12-setup-raspberry-pi-for-kiosk-mode/ Everything has went fine, no errors, no crashes. ...
0
votes
1answer
43 views

Raspberry cannot install anything via sudo apt-get install <x> [closed]

yesterday i bought a new Raspberry Pi 4 Model B. Im trying to install java & other packages but when i try to install via command: sudo apt-get install <x> i get the error: i tried to with ...
0
votes
0answers
169 views

Error while Starting Raspbian

Enviroment: Device: Rasberry Pi 2 OS: Raspbian Last sign of life: 8.March 2021 Problem Since 8th of march I've got no message of my raspberry pi, so I get them and try to boot with a connected monitor....
1
vote
2answers
54 views

How do I debug these spontaneous crashes?

My headless Pi 2 (running stock raspbian) sometimes crashes out of the blue. It happened again today, and I had a monitor attached so I was able to get a photo of its final words. I just don't know ...
1
vote
1answer
66 views

Are the ARM Mailbox and Doorbell interrupts ever triggered?

I'm writing some very bare metal multi-tasking code that manipulates the hardware on a Pi3. Part of that is to initialise a frame buffer, and I'd like to avoid polling loops, where possible. (e.g. ...
0
votes
1answer
65 views

Energy consumption raspberry pi 2B

I would like to calculate the energy consumption of a given process in a Raspberry Pi 2B Rev.1.1 BCM2836. It is fed using the microusb port through a laptop docker via USB. I'm using atop to get the ...
0
votes
0answers
23 views

Pi 2B with docker loose connection after some time

I have a Raspberry Pi 2B, I installed first Raspberry OS lite and then Ubuntu Server. The behavior I will descript was the same in both systems. So, I wanted to use Docker to run a web server (1 ...
1
vote
1answer
125 views

Problem copying Micropython from Rpi2 to Pico

I am following this page for instructions: https://www.raspberrypi.org/documentation/pico/getting-started/ I see the pico added as a drive when I hold sel button, and apply power with the usb cable. ...
0
votes
0answers
34 views

Configuring Rasberry Pi 2b for WiFi adapter monitoring fails upon reboot

I've been using this guide to configure my Raspberry Pi model 2b and turn my WiFi usb adapter into monitor mode. To note I used this github repo to get my WiFi usb adapter working on my Raspberry Pi ...
0
votes
2answers
55 views

Prevent automatic connection to open wifi

I am using a Raspberry Pi 2 with a USB wifi adapter (headless setup). The wpa_supplicant.conf file contains authentication information only for my wifi access point, and the pi connects to it as ...
0
votes
0answers
34 views

Raspberry Pi Water Level Sensor doesn't work

I got a question. I'm trying to make a water level sensor to check the water level with Raspberry Pi and a water level sensor using this tutorial. https://kookye.com/2017/06/01/design-a-water-level-...
0
votes
0answers
18 views

Raspberry pi 2B is stuck on rainbow screen and the 7" official screen is white

My Raspberry pi 2B works perfectly fine when it is connected to my TV via HDMI. But when I connect it to the touchscreen at the same time, the touchscreen is just a white screen and on the HDMI, it is ...
2
votes
3answers
360 views

RPi fails to get DHCP-assigned IP address

tl;dr: After my local network addressing scheme changed from 192.168.1.X to 192.168.21.X, my RPi failed to adapt and was still accessible via 192.168.1.2. When I added iface eth0 inet dhcp as the last ...
0
votes
0answers
146 views

Fail to install alpine linux in sysmode

I have a raspberry pi 2B and I wanted to install alpine linux in sys mode. I use a 64gb microsd samsung evo plus. I followed the wiki of alpine here formatting like in troubleshot the boot partition ...
1
vote
2answers
2k views

PiHole Not Resolving Local DNS Entries for clients with static IPs

I have a Raspberry Pi 2 running Pi Hole 5.2.2 and Cisco Linksys E2000 router running DD-WRT v24-sp2 (08/12/10) std-usb-ftp I want to be able to have PiHole resolve a DNS entry such as MyDevice to an ...
0
votes
1answer
179 views

Python script not playing audio when run through systemd

After trying every possible solution online I am posting this question. I have a python script that runs on boot with the help of systemd. Everything worked fine till I installed a fresh raspian ...
0
votes
1answer
38 views

voltage issues with GPIO raspberry pi 2

Need some assistance here. I am trying to setup some high voltage SSRs to my Raspi for an eventual lightshowpi project. Trying to start small first. I have a bunch of LEDs I have been playing around ...
1
vote
0answers
59 views

Raspberry Pi 2B External HDD not detected

I'm trying to connect my external hard drive to my Raspberry Pi 2B, but I am not able to get it to show up. I am running the latest Raspbian, and I have updated my software. Running lsblk --fs, I only ...
0
votes
1answer
440 views

firmware bug bootloader left irq enabled bank 1 irq 9 and boot fails

I updated the packages on my Raspberry Pi 2 (running Ubuntu Mate 20.04) by using apt update and apt dist-upgrade. Everything went smoothly. Then I restarted, and got the following error during the ...
0
votes
1answer
225 views

QEMU 5.1, rpi2b, (Arch) and ssh. SSH fails

EDIT: I significantly updated this after applying @Nikita Kipriyanov's answer. As of version 5.1 or 5.01 QEMU now supports RPI2 & 3 and USB. As the network on the RPI is behind USB, I should now ...
0
votes
0answers
103 views

RPi 2B slower internet speed via ethernet connection

I have a RPi2 B and been noticing I am not getting the full internet speed via the ethernet connection. My setup: 1TB HDD via USB 16gb Sandisk MicroSD RPi2 B connected directly to modem Plex, RClone, ...
0
votes
2answers
35 views

Best way to detect a small portable device in the range of 5-6 meters [closed]

I have a couple of things automated in my room (fan, lights etc) using a server running on Rapsberry Pi 2 and relays. Now I would like to implement a system to automatically detect when I am in the ...
0
votes
0answers
25 views

Raspi 2 v1.1 freezes randomly

I set up my old Raspi2 v1.1 a few days ago, but its behaving strange. It freezes / hangs up after some time. Things I've tried so far: Swapped out my sdcard for a different one Copied the os to an ...
0
votes
0answers
47 views

Raspberry PI and 8 module relay board

I have a raspberry pi 2 and an 8 module relay board (http://nettop.gr/index.php/en/hlektronika/relay/8-channel-5v-relay-module-with-light-coupling-5v.html). Between the relay board and the raspberry I ...
0
votes
0answers
42 views

VPN working? or not? How do I know?

I have what appears to be a working VPN on my Pi2 with Raspbian which I can access from an Android mobile phone and a Nexus 7 using PureVPN What I cannot determine is whether it is actually working ...
0
votes
1answer
39 views

Why here capacitors of 0.1uf and 100uf are used?

What is the use of these two capacitors here. The circuit is working just fine without them also.
0
votes
0answers
19 views

Yocto linux on rpi 3b+, bootup issue. mmc1 is not getting hardware interrupt

I tried to bootup rpi 3b+ with yocto-linux(kernel v4.19)(console image) but its not booting up. I suspect its something related to i2c or interrupt. Note : I have taken care of device tree and overlay....
-1
votes
2answers
1k views

DHT 11 sensor not found, check wiring

I am using raspberry pi 4 model b and sensor DHT 11 for checking the humidity and temperature. When I am using the code DHT.py, the result is: 1604263139.922 4 3 0.0 0.0 1604263142.192 4 3 0.0 0.0 ...
0
votes
1answer
58 views

Using pi as router

What is the minimal config needed, to be able to specify some static route for network subset (eg 10.199.0.0/16), so that my raspberry redirects to internal PC? LAPTOP (pink) is connecting via VPN to ...
0
votes
0answers
19 views

Is there an Arch derivative for Raspberry Pi 2 that has desktop environment preinstalled?

I have a Raspberry Pi 2B, and want to install an Arch based distro on it. Is there a derivative of Arch that supports Pi 2B and also comes with desktop environment preinstalled? Arch Linux Arm ...
0
votes
0answers
24 views

How to install Lantern Pro for Raspberry Pi 4b? [duplicate]

I have a lantern pro account, I want to install and use it for my Raspberry Pi 4B How to install Lantern Pro for Raspberry Pi 4b?
0
votes
1answer
150 views

Installing OpenCV fails for missing header files

I am trying to install opencv 3.0.0 on my raspberry pi 2b but I keep running into erros... currently, it complains about the following missing header files when I run the following cmake command: ...
0
votes
0answers
192 views

Cannot change display resolution from 640x480

I have a Raspberry Pi 2 Model B. which I use to auomate a couple of things in the house. I connected a relatively old Full HD display which has VGA input, by using a HDMI to VGA adaptor. The display ...
1
vote
3answers
46 views

power supply specification

are there any public requirements (which I have not found) specifing power supply ramps / gradients e.g. is there a spec like from 0 to 5V in 5ms or faster also when turning of, is there any ...
0
votes
0answers
302 views

Installing php7.4 + MySql on Stretch with nginx

I want OwnCloud and I am trying to install PHP 7.4 on Raspbian GNU/Linux 9 (stretch) following @janw's tutorial but facing some errors: E: Unable to locate package php7.4-… then I was able to solve ...
2
votes
2answers
115 views

Access 192.168.2.x from 192.168.0.x

My Rpi-2 is connected to my home router which assigns an IP address 192.168.0.x to all its clients. I have created a network bridge on this rpi so that it shares the main routers connection with the ...
0
votes
1answer
239 views

RPi will not boot to command line [closed]

My RPi 2 (jessie) still boots to desktop, if I configure CLI in raspi-config. I also tried what was recommended here: sudo systemctl set-default multi-user.target sudo ln -fs /lib/systemd/system/getty@...
2
votes
3answers
775 views

MySql backup database every night

I have service and MySql database on my Raspberry Pi 2B. Yesterday, my SD card in my phone died. I started thinking about database backup on my Raspberry Pi. Anybody have any experience with this? I ...
0
votes
0answers
50 views

Load cell changing over time

I'm using a 1kg load cell beam (see example at bottom) connected to a HX711 board then connected to the Raspberry GPIO. I'm running this Python3 code: https://github.com/gandalf15/HX711/blob/master/...

1
2 3 4 5
32