Questions tagged [pi-3]

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

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19 views

Hostapd won't serve wlan0 when connecting a 2nd phone

I'm using a raspberry Pi ARMv7 Processor rev 4 (v7l) for serving as a wlan access point from my LAN. I've been following the official documentation access-point-routed.md I set the local to CH and ...
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0answers
31 views

hostapd: Pi 3 built-in WiFi going up and down every second

I am using a Pi 3 Model B running Raspbian buster and kernel version 4.19.118-v7+. I have been trying to configure it to run as a WiFi repeater using the built-in WiFi (wlan0) which is configured to ...
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1answer
23 views

Audio cuts out periodically when using audio hat

I am currently live streaming some audio to and from a raspberry Pi Zero W using the waveshare audio hat however I have found that the audio periodically cuts out when I do this. When I used my logic ...
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0answers
98 views

How to install MongoDB on Ubuntu Mate 20.04 running on pi 3?

I have an instance of Ubuntu Mate 20.04 running on my Raspberry Pi 3 and I am wondering if it is possible to install MongoDB 4.2 without compiling it. I am not sure where I can get the builds from. ...
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0answers
50 views

Receive and send bluetooth audio to bluetooth device from Raspberry Pi 3

I have the Raspberry Pi 3 with the latest version of Raspbian Buster and I am looking for a way to have the RPi to receive Bluetooth Audio from a phone or laptop and output the audio to a bluetooth ...
2
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1answer
107 views

Interfacing Micron Serial NOR Flash Memory

I want to communicate with Digilent Pmod SF3 which contains Micron N25Q256A NOR Flash memory. I did all the wiring setup between Raspberry Pi and Pmod board as shown below: Pmod RPi ==== === ...
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4answers
89 views

Battery Solution for Raspberry Pi 3b

I am working on a project for which I need to attach the four raspberry pi boards on the ceiling of the room (one at each corner). The script that will run constantly scans the BD Address and the RSSI ...
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3answers
163 views

Raspberry Pi 3 high IO

my Raspberry Pi 3 is currently suffering from a very high IOWait. Running iotop gives me the following: It's listing some perl process but I have no idea what it is or why it's using 99% IO. Any help ...
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0answers
76 views

PIR sensor always high with Raspberry Pi3 without breadboard

I have a HCSR501 PIR motion sensor, which has 3 pins (Vcc, Out, Gnd) that I've connected to 5V, GPIO 26, and Gnd respectively. Despite following all the steps in tutorials for interfacing the sensor, ...
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1answer
84 views

Delay/Lag when controlling motors with arduino from raspberry pi

I'm making a car-type-thingy where I control motors connected to an arduino with a raspberry pi via serial communication. I'm using the adafruit motor shield to control the motors. I want to control ...
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1answer
267 views

Setup Wifi direct (wifi p2p) between dedicated pair of Raspberry Pi 3 B+ - One Group Owner, the other the client

What I would like to accomplish: A dedicated pair of RPi's using Wi-Fi Direct (p2p), one GO (group owner) the other its Client. The GO is not to be an Access Point as neither RPi needs to connect ...
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0answers
43 views

Using a port expander AND other GPIO pins

I'm working with a port expander for the pi to run four stepper motors from python. It was working great until I tried to also use a GPIO pin on the pi (not on the port expander) as an output. I was ...
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1answer
276 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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0answers
71 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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0answers
35 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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0answers
32 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
77 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
200 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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0answers
13 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
58 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
29 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 ...
1
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1answer
121 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
344 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 ...
1
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1answer
695 views

Rpi PIR Motion Sensor HC-SR501 always reads high, why? [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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1answer
647 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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0answers
20 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
182 views

Rpi3B+ GPIO Controlling Remote IR Controller Problem

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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0answers
40 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
1k 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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0answers
120 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
172 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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0answers
31 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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0answers
55 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
39 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
77 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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0answers
42 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 ...
2
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1answer
31 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 ...
0
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0answers
75 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
122 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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2answers
85 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
41 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 ...
2
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2answers
37 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 ...
3
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1answer
171 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 ...
1
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1answer
153 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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0answers
46 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, ...
1
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1answer
180 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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0answers
200 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
1k 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....
1
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2answers
81 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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