Questions tagged [pi-3]

For questions that apply specifically to the Raspberry Pi 3 and not other/all models.

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13 views

Building A NAS and Plex Server

I am looking to use Raspberry Pi 4 to build home NAS from where I will run a PLEX Server for my tons of media. Here is what I have got so far: CanaKit Raspberry Pi 4 8GB Extreme Kit - 128GB Edition (...
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20 views

Interfacing barcode scanner with Raspberry Pi 3 [closed]

I am working on a project in which I have to use bar-code scanner with raspberry pi in order to scan the serial number of a product. Now I am new to raspberry pi and in YouTube they have shown the ...
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1answer
31 views

rpi nfc tag emulation

I am looking for a NFC device which can work with rpi (3B) and is able to emulate card. NFC devices are super confusing world. I tried several NFC devices with PN532 controller and all of them so far ...
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17 views

Monitor “No Signal” after the Raspbeprry Pi logo

I installed RPi OS successfully on my RPi3 Model B, after couple of minutes the screen goes black and says "no signal". I am using a VGA monitor with a HDMI/VGA connector. When I reboot my ...
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32 views

4B having issues with USB serial and booting with USB ports populated

first time OP'er here I have two issues which I do not know if they are related. Some quick background about my setup I have 4B 4GB pi. I have 3 USB2.0 webcams, the webcams have their cables spliced ...
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29 views

VGA output suddenly not working, Why?

I have been using my VGA monitor for my RPI3 Model B using a VGA to HDMI cable and it works perfectly fine, but today when i turned on my pi the monitor says "No signal" I thought that my ...
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1answer
49 views

problems lighting up LED on pi 3

HI i am new tp pi and python and wanted to create something that simply turns on and off a led. It does not seem to work and not sure why? here is the python script: from gpiozero import LED, ...
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1answer
43 views

Setting up Raspberry Pi as wireless access point with static IP config

I am trying to set up my raspberry pi to act as a router. The set up is the following: The Raspi receives its connection to the internet through Ethernet, with a static IP address setting. The subnet ...
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9 views

How to use the turtle graphics package on my Pi 3B

I have a built a car which uses distance sensor to navigate a room. I want to map out the room's diagram based on how the bot car moves. The turtle graphics package in Python translates commands like ...
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1answer
37 views

Can I plug my SD card from Pi 4 into a Pi 3?

Can I use my SD card from a Raspberry Pi 4 2GB in Raspberry Pi 3? If not, is there a way to get some python and node-red files from my SD card as my Raspberry Pi 4 kinda got fried?
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1answer
28 views

How to set relative configuration file for my name-password AP?

I would like to connect my RPi3 with wifi attached. I can scan all APs in my office using command "iwlist wlan0 scan". But I can't find IP address at response of ifconfig wlan0. I can connect to an AP ...
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1answer
65 views

How can I install Wi-Fi drivers from first boot on Raspberry Pi 3B?

I'm trying to configure my Raspberry Pi 3B and Raspberry Pi Zero so that I can modify cmdline.txt, and have it install the drivers for my TP-Link adapter from first boot automatically. My Pi has ...
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2answers
60 views

What is the location of my crontab or all crontabs?

I am a newbie to raspberry pi's so please forgive my lack of knowledge. A few years ago I was given a raspberry pi 3, I had it set up with a crontab file which ran some commands for me which have ...
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29 views

Raspberry Pi motion sensor always high even when movement is not detected [duplicate]

I'm trying to use a motion sensor with the Raspberry Pi but despite all the tutorials I followed, the input of the raspberry pi is always high. Here is my code below. import time GPIO.setwarnings(...
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1answer
103 views

Raspberry Pi motion sensor always high [closed]

I'm trying to use a motion sensor with the Raspberry Pi but despite all the tutorials I followed, the input of the raspberry pi is always high. Here is my code below. I used a LED to turn it on when ...
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19 views

Python3.6 - Lxml Package freezes during installation [closed]

I'm trying to use a pyquery mod, which needs lxml but every time i try and install it it freezes on installation I get this far: the / stop spinning and i've tried to leave it for a few hours but ...
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1answer
41 views

How to install PHP 7.2?

The title says it all. I'm trying to install PHP7.2 on RPi 3 so I can install OwnCloud on it. When I run sudo apt-get install php7.2 -y I get Unable to locate package php7.2. Do I need to add a repo ...
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17 views

guizero stuck until serial input

I'm a newbie to Raspberry PI and guizero. I'm trying to change texts and set some menus visible using button and I have to print serial data on the screen. My problem is when I change text and hide ...
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2answers
65 views

How can Rpi3B+ GPIO input IR signals direct from Optoma HX180X projector's remote control CN1082?

I am trying to record the IR codes from my projectors remote. Nothing seems to be working and I need some help. I want to be able to directly record the IR signals that my remote is putting out when ...
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12 views

Raspberry Pi 3 : how to find device number and card number with bluetooth

I'm trying to set up google assistant on my raspberry pi with this guide: https://pimylifeup.com/raspberry-pi-google-assistant/comment-page-2/?unapproved=27549&moderation-hash=...
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1answer
92 views

is iptables broken or is it a kernel related issue?

I am trying to setup an access point on a raspberry pi 3 v1.2 using this repository create_ap with this Wifi adapter Bus 001 Device 005: ID 0bda:8178 Realtek Semiconductor Corp. RTL8192CU 802.11n ...
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37 views

Raspberry pi mining cluster

I just got into mining on my raspberry pi. I figured out how to run a cpuminer on my raspberry pi and I just baught 3 more raspberry pi 3 b's. I Found out how to cluster my pi's to form a large ...
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1answer
51 views

How to boot Raspberry pi 3 without sd card

I have lost my micro sd card and am unable to use my raspberry pi 3B. I can't buy a new one since online delivery has been stopped where I live due to the lockdown. Is it possible to boot my raspberry ...
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27 views

Is there an OS that works as a smart home touch panel running from my Raspberry Pi 3 (2015)

I have a smart home and want to be able to control them by having a dedicated touch panel that has easy to use buttons but also has a few settings. I have a Google Home but having a touch panel would ...
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22 views

Using RPI to control analogue VIDEX intercom system

I'm getting to grips with Python and RPI with the view to replacing one of the VIDEX 3311 intercoms at my workspace with an RPI device to answer the buzzer, see who's at the door (using extant systems)...
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1answer
28 views

SimpleCV console cmd is not working at all in RPI 3B running on Raspbian Buster release

I have enclosed the screenshot of the error above. Looking for solution to SimpleCV traceback/syntax error problem: I have already tried installing SimpleCV with a fresh image of Raspbian Buster. ...
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0answers
20 views

Kivy on Raspberry Pi returning double on_press events

I have an RPi and official touchscreen running Debian Buster and Kivy v1.11.1 using the simple example at https://kivy.org/doc/stable/api-kivy.event.html it is returning double touch events for ...
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11 views

Linphone failed register SIP Account

I want to install a linphone built from source code. The linphone build process from this source code has been successful. However, when trying to register a SIP Account on the server, this raises the ...
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1answer
26 views

How do I diagnose suspected power issues?

I have a Pi 3 project that has quite a few things attached. 4 DHT-22s powered from the 5v rail (5m cable length, so I needed the 5v for the voltage loss). Wired in like this 2 Magnetic door reed ...
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0answers
23 views

Error Installing linphone from source

I want to build a linphone from source code. I followed the guidelines on the (https://wiki.linphone.org/xwiki/wiki/public/view/Linphone/Linphone%20and%20Raspberry%20Pi/) but the linphone-sdk clone ...
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2answers
76 views

Detecting Voltage With a Raspberry Pi

I want to use a Raspberry Pi to detect whether a generator has started. I had planned to hook a 5V power supply to 1 of the 240V legs on the generator and then run that through a 3.3V voltage ...
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1answer
34 views

Can I use Raspberry Pi as a USB speaker?

Now I have A: Desktop PC with Arch Linux B: Raspberry Pi 3 with Raspbian Buster connected with a speaker and I'd like to use B as a wired speaker of A. By "wired", I mean that A and B are connected ...
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1answer
30 views

Is it safe to connect a 12V and 0.25A fan to Raspberri Pi 3 B via USB port

If it is safe to connect a 12V fan via usb to the Rpi3 then can you also tell is it feasable to code in python to control fan via USB that is to switch it on and off. Please do help as soon as ...
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2answers
32 views

Importing raspi data from sd card to computer

My sd card with raspbian installed is not displaying the data stored on it, such as files in the home directory etc. Inserting it into a computer causes the RECOVERY drive to show up, which looks as ...
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1answer
44 views

Pi 3 nextcloud server and NAS

Is it possible to use something like dietpi, install nextcloud as well as have a NAS in the same thing accessing the same files? What I would like is a system where I can access the NAS via my Linux ...
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1answer
51 views

Permission denied on executing script

I can't execute a script. I'm struggling with this. OS version and hardware model I'm on Raspbian GNU/Linux 10, Raspberry Pi 3 Model B. Devices When I call lsblk I get: $ lsblk NAME MAJ:...
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22 views

Connection refused:remote debugging jar file on pi

I have an executable jar file that I can run on the pi. Now I want to debug it on the pi. I can start up the jar file in debug mode and have it listening for a connection, but when I try to connect, ...
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1answer
21 views

How to disabled sidebar image on RetroPie?

How do I hide the images on the side (highlighted in red ) ? I want to display the game full screen. Please advise.
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53 views

RTOS on Raspberry Pi3 or Pi4

Has anyone made any progress on getting a version of RTOS to work on a Pi3 or Pi4? I hope that in the past 3 years someone has managed to succeed with this. The last posts I find are back in 2017. ...
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1answer
15 views

RPi 3B (not +) image on RPI 2

I have OctoPrint running on my Pi 3 Ok withou any issues. Should I be able to boot the same image on a Pi 2? David
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1answer
89 views

serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)

I am trying to read RFID code from RFID reader by using RPI. This is my code: import serial from time import sleep import RPi.GPIO as GPIO GPIO.setwarnings(False) GPIO.setmode(GPIO.BOARD) GPIO....
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2answers
54 views

Raspbian motion error

i'm trying to configure motion in raspbian. All works good but i have some problems with on_movie_end, this is the command: on_movie_end /home/pi/motion/drop/dropupl.sh this is a script that upload ...
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1answer
34 views

How do I get ubuntu 16.04 ARM64 iso get working on Pi3B

I downloaded ubuntu 16.04 arm64 iso image , and used Etcher to flash on to SD card. But my Pi3 B does not boot ?? anyone faced this issue and how to fix. Thanks in advance.
2
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1answer
70 views

/boot/config.txt gpu_mem has no effect

I put gpu_mem=512 in /boot/config.txt (which file I had to create), and it had no effect. grep memory /var/log/Xorg.0.log returned only 2,839kB: [ 132.909] (II) FBDEV(0): hardware: BCM2708 FB (...
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1answer
62 views

Where can I download older version of Raspberry Pi Imager

Appreciate any help. I am looking to download older version of Raspberry Pi Imager. The reason is I need to download ubuntu 16.04 arm64 for Pi 3B and Pi4B. The latest imager dooes not show thsese ...
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0answers
156 views

pyaudio - Alsa warnings on Raspberry pi

I am trying to send data through 3.5mm jack. In that process, Everytime i'm getting these warnings import pyaudio p = pyaudio.PyAudio() The following warnings are: Expression '...
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1answer
24 views

Setting a GPIO port for an accurate time duration with Python

I am trying to set a GPIO port to LOW for n seconds and set it to HIGH afterwards. The problem is that it's not at all accurate. It varies between a small number of seconds to 2*n or even more. ...
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0answers
204 views

How do I fix adb “failed to start daemon” error?

I am trying to use adb on my Raspberry Pi. However, whenever I try to use any adb command (such as adb devices in the command-line, I get the following error: * daemon not running; starting now at ...
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0answers
47 views

ACT led blinks 4 times

My raspberry pi 3 B won't boot. The ACT led blinks 3 times, then it blinks once longer than before, then repeats.No signal on 7" touch display, no signal at HDMI, config.txt hasn't been messed with....
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1answer
35 views

Is it possible to change HDMI mode without rebooting?

I would like to try different combinations of hdmi_group and hdmi_mode without having to reboot. Hardware and OS: Pi3B on Rasbian buster

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