Questions tagged [pi-3]
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
3,361
questions
0
votes
1answer
15 views
Raspberry Pi 3 B insanely slow on basically all tasks
My Raspberry Pi 3 B is only connected via Ethernet to the network and running a couple of server tasks, among them an HTML web server (nginx PostgreSQL Typo3). This was working perfectly fine for ...
0
votes
1answer
18 views
Raspberry Pi WiFi Hotspot / Access Point
I am a beginner Raspberry Pi user and my knowledge is mainly around software.
I don't know the correct terms for what I am trying to do so this may be a duplicate question.
Is it possible to connect ...
0
votes
0answers
13 views
Python sound recognition?
I'm trying to program my Pi to monitor for specific sounds like buzzers, alarms, etc. I've seen articles suggesting the use of a "sound sensor", but I already have a microphone (an AIY ...
0
votes
3answers
41 views
How to schedule turning off and on of a pi4 using cron?
How to schedule turn off and on of a pi4 using cron ?
Hello, to save power I wanted to schedule precisely when my RPI has to be turned on and off.
I think Cron was a good solution so I try to edit ...
0
votes
1answer
38 views
Turn on an LED with dimming and stay on
I want to start the LED gradually with dimming by using PWM.
And then once at a ChangeDutyCycle(100) I want it to remain on GPIO.output(led, GPIO.HIGH).
import RPi.GPIO as GPIO
import time
led = 17
...
0
votes
0answers
21 views
How to operate the camera on raspi3?
My material:
Raspberry 3 + camera (official) purchased together and never used before
Validated interfaces: ssh, vnc serial-console and camera
Added software: Apache, php, mariadb phpmyadmin
I took ...
1
vote
0answers
28 views
Change the CPU Core Voltage from terminal
I was wondering if anyone is aware of how I can change the CPU Core Voltage of a Raspberry pi using system calls from the terminal. I know that we can do this by setting the over_voltage parameter in /...
2
votes
0answers
24 views
Overclocking Raspberry Pi after the device has booted
I using a Raspberry-Pi 3B+ device and I am trying to change the maximum frequency after the device has booted. From my understanding, this can be done by editing the files under
/sys/devices/system/...
0
votes
0answers
24 views
Specifics on connecting RFM69 to pi3
I am trying to follow these instructions to test a RFM69 module added to an Raspberry Pi 3.
This is likely rather naive, but I would like to know details on how to connect the pi to the module.
The ...
0
votes
1answer
29 views
Raspberry Pi Model B Current Overdraw from 3.3V Pin
I am using RPi3 ModelB V1.2 for a motor control project. I am connecting Pin1 (3.3V) for power to a micro dc motor. The current drawn by the motor is approx ~70 mA whereas the RPi sources mention that ...
0
votes
1answer
32 views
How do I make my Raspberry Pi act as a wireless USB controller? Not over the same network but remotely using a 3G/4G & LTE Base HAT
I am trying to download data from a USB based device remotely. i.e. Using a WiFi dongle or 3G/4G & LTE Base HAT.
Am I able to install a driver for a WiFi dongle or 3G/4G & LTE Base HAT on an ...
0
votes
1answer
35 views
How to make Raspberry Pi connect to my Wifi using headless method?
I have followed many tutorials (actually they have been doing the same thing) on how to set Raspberry Pi to connect to my WIFI but I am not winning. I have used the Headless method and my network file ...
0
votes
0answers
46 views
No analog sound in Raspberry Pi 3
I have a Raspberry Pi 3 with Raspbian Buster installed. When playing Youtube I get no sound through speakers connected by audio jack. After some research, I did the following:
1.Audio output is set to ...
0
votes
1answer
22 views
Access RPi's Web Server Connected to Smartphone Hotspot [closed]
I built a web server with Flask and I am able to access my website on my LAN. Instead of connecting my Pi to my router, my plan is to connect the Pi to my smartphone's hotspot, for portability.
I don'...
0
votes
1answer
26 views
Corrupt SD card on Pi but not in Windows
When I boot up my Pi all I get is a solid red light, not the green one. I believe this is because the SD card is corrupt, but it was working fine the other day. I put the SD card in my windows PC and ...
1
vote
0answers
27 views
How to play through bluetooth speakers with RPi renderer on lan and openhome/linn android phone control point
Using RPi3b and clean installation of RaspberryPi OS Lite and connecting to network using lan.
Media is stored on NAS and served to lan by minimserver.
I have installed upmpdcli and mpd on RPi and ...
0
votes
0answers
26 views
Why I get “segmentation default” when add module to kernel?
I have build softuart.ko and add into kernel, but I got "segmentation fault" error when run insmod. I get code from https://github.com/themrleon/RpiSoft-UART.
The detail message error I got ...
0
votes
2answers
37 views
OS image with ssh enabled
My Raspberry Pi appears to boot but there is no HDMI output.
I’ve tried various troubleshooting steps but with no success.
Before I go down the route of buying another Pi I was wondering if there’s an ...
0
votes
1answer
25 views
Images with Multiple kernel to share among Pi-B, Pi-3 and Pi-4
I have 3 models of Raspberry from ARM-v6 to ARM-v8 and would like to have SD cards that i can exchange among them.
After testing my SD IO have realized that
Retropie and RaspberrOS works well on Pi1 ...
0
votes
0answers
56 views
Connect multiple bluetooth barcode scanners to Raspberry Pi 3
I am working on a project for my university. I want to connect several Bluetooth barcode scanners (OPN2006) to a Raspberry Pi 3+ by using the Bluetooth SPP. I managed to make the connection to one ...
0
votes
0answers
21 views
Max. data-transfer-rate for RPi 3 over Wifi
Q1 What is the maximum data-tranfer-rate for the RPi 3B onboard wifi as access point?
Q1.1 If it's > 72 Mb/s what does the config for hostapd.conf look like?
-2
votes
1answer
40 views
Raspberry Pi3 AutoLogin doesn't work
I recently updated my Raspberry pi3 (non b+) from Raspbian jessie to stretch and then to buster (it's also rocking Retropie 4.7.1 on top of that).
And for some reasons the autologin function : raspi-...
0
votes
0answers
29 views
450MHz - 2.4GHz Receiver
There is a device in my house that is broadcasting in the 450MHz - 2.4GHz range. I do not know the exact frequency that the device is broadcasting on. I am looking to use my raspberry pi to receive ...
-1
votes
1answer
29 views
Pi-3 virtual box
I have raspberry pi 3b with kali linux, i want to know that is it save to install metasploitable 2 in virtual box in raspberry pi 3b.
Will my raspberry pi be able to handle it because it have only 1 ...
0
votes
0answers
16 views
Autorun Server Script only when booting to CLI
I've been trying to set up my Pi to run two different server instances. The first one I've successfully set up to launch a web server and Chromium into Kiosk mode after the Pi boots up into its ...
0
votes
0answers
46 views
How to use Rasbperry PI 3 or Raspberry PI 4 as VPN Router?
I would like to use either Raspberry PI 3B 1GB or Raspberry PI 4 8GB version as VPN Router.
I have the following:
4G Router
Either Raspberry PI 3B 1GB or Raspberry PI 4B 8GB
TP Link Router
My plan ...
0
votes
0answers
24 views
Twin touchscreens on Pi 3/4
I'm looking at a project where I will need to drive two separate displays from a Pi, both of which are touchscreen - specifically GT911 type on a separate I2C connection.
This will almost certainly be ...
0
votes
0answers
46 views
I have bought a Raspberry Pi display. It’s working good, but it has 3 buttons on it and I don't know what these buttons are for. Can anyone tell me?
I have bought a rassberry pi display its working good but it have 3 buttons on it and i don't know what these button are for, so can anyone tell me ?
0
votes
0answers
25 views
Add startup app in config
I have a raspberry pi zero w and I need to add a python script to startup just by editing the files in boot unit, instead of adding a line to cron using terminal.
Thanks for help.
1
vote
1answer
57 views
No devices listed in OMV: RPi3+RPiOS+USB-3 SSD
I have a Raspberry Pi 3b running the latest version of OpenMediaVault, which I installed using the official-ish script onto a clean and updated Raspberry-Pi OS installation that I created with ...
0
votes
0answers
20 views
Eclipse 4.18 on Raspberry Pi
I would like to install newest Eclipse 4.18 for C++ development on Raspberry Pi 3 with 1Gb RAM. Is it possible to do so with such hardware resources?
Will it run fine on Pi 4 with 8Gb RAM?
0
votes
1answer
127 views
How to execute a Python script on RPi remotely and receive data? [closed]
Question:
I am trying to run a Python script remotely on my RPi from another python script on my computer.
For now, I have created a local network on my RPi, that my computer can connect to.
I tried ...
1
vote
4answers
215 views
Using single 5V relay module (jqc-3ff-s-z) - Asking for help
I have a developer background missing the electronics background. I read some threads with great interest:
Using single 5V relay (jqc-3ff-s-z) - safety advice required
and
5V relay (jqc-3ff-s-z)
I ...
0
votes
0answers
51 views
Ubuntu Server 20.04.1 32bit vs 64bit on RPi3 Model B
I want to use my RPi3 Model B as web server (classic LAMP stack + python, maybe other things too) where I will host my own web-based projects. I'm now deciding which OS to run; I have tried following ...
0
votes
1answer
24 views
Raspberry Pi 3 Stops Booting
I have been using my Raspberry Pi 3 A+ for a few months now,
and recently I ran sudo apt upgrade && sudo apt update.
After this, the raspberry pi worked fine, but after I rebooted it would ...
0
votes
0answers
24 views
Raspberry Pi asking for Username and Password GUI and Pi folder been removed
I installed OpenVPN on my raspberry pi 3b+, I had some problems while trying to connect to the VPN server I tried some solutions after that the terminal on the raspberry pi changed its name.
I reboot ...
1
vote
1answer
65 views
Is it possible to make a WIFI to LAN Bridge with the RaspberryPi3b and Bridge Utils?
I am currently trying to make a bridge between the Wifi and Lan on the Raspberry Pi 3b with Raspberry Pi Os Lite for an Assignment. The Task is to connect the Raspberry to the Wifi and then Bridge it ...
1
vote
0answers
77 views
Tensorflow on Raspberry Pi with Ubuntu 20.04
I've installed Ubuntu 20.04 on a Raspberry Pi.
Both my Ubuntu and Python3 installations are 64-bit.
I'm now trying to install Tensorflow so that I can run (not train) a model.
I've tried various blog-...
2
votes
1answer
125 views
Why do I get a “Segmentation fault” during “apt update” on a fresh installation of Raspberry Pi OS?
I found my old Raspberry Pi 3 B and wanted to start a new project. When I flash a new Raspberry Pi OS (32 bit) on an SD card (128 GB, bought a new one to make sure its not the SD card) via the ...
0
votes
0answers
16 views
Problem booting Ubuntu Core
I used the Raspberry Pi Foundation's Imager for the Raspberry Pi on MacOS. I successfully flashed ubuntu core 20.04.1 and put the card into the pi. At first, it showed the ubuntu logo with 'Core' for ...
1
vote
0answers
28 views
Connecting a phone to a Pi 3A+ using Bluetooth fails
I want to connect my phone using BLE to a Pi 3A+.
For testing I have set up a Bluetooth server using this code.
I have tried connecting with nRF Connect on both a Motorola Moto e5 (Android 8.0) and a ...
2
votes
2answers
393 views
Bluetooth status: inactive (dead)
I have uninstalled BlueZ from my raspberry pi.
sudo apt-get --purge remove bluez
Then, I reinstalled it using this tutorial:
wget http://www.kernel.org/pub/linux/bluetooth/bluez-5.47.tar.xz
tar -xvf ...
0
votes
1answer
80 views
Installing Ubuntu MATE
So, before I install Ubuntu MATE, I have files on my microSD card from my other Pi (that broke) and I am wondering if I can boot another Pi (a school-owned one) to transfer the files. Can I boot the ...
2
votes
0answers
62 views
Wiring 12V 5 pin relay (without a module/board) for usage with Raspberry Pi
I'm trying to setup an automated garden as a quarantine project for my mother and I can't really figure out how to properly wire a 12V 5-pin relay module as every tutorial online only shows the ones ...
0
votes
3answers
59 views
How to sync clock on raspberry pi with restricted internet traffic
I have a few raspberry pi's operating at a customer facility, and this facility has restricted the pi's traffic to only the IP of my server (digital ocean ubuntu droplet running a django application). ...
0
votes
0answers
33 views
Video and pictures on gmediarender
I managed to get audio with bubbleupnp from my android device to my RPi 3 that runs gmediarender, but when I try video it only outputs audio and no video. I can't understand is it even possible to ...
0
votes
0answers
34 views
icons, desktop background disappeared
I closed the Add or Remove Programs program while it was updating packages. I assumed it would just cancel the process. I decided to reboot just to be sure, but when I opened the shutdown menu, the ...
0
votes
1answer
236 views
How do I fix this broken upgrade?
I run sudo apt update and sudo apt upgrade every month on my pi.
A couple weeks back this occurred during the upgrade part.
> pi@ngpi:/var/log $ sudo apt upgrade Reading package lists... Done
> ...
0
votes
1answer
52 views
How to implement serial event detection for request /response operation with Tkinter
I am working an application where I read two sensor values in every 200ms and show values in Tkinter window .
My issue is in my application I have to response request from master PC through serial ...
0
votes
1answer
28 views
How can I work on a pre-existing raspberry pi/sd card on my computer without re-writing over the card?
I was given a raspberry pi 3 B vol. 2 that uses sonic pi to control a walk-on piano and am trying to work on the code contained on the micro sd card, but when I try to open it for the first time ...
