Questions tagged [pi-3]

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

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1k 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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1answer
1k 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
1k 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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2answers
262 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 ...
1
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1answer
2k 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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1answer
2k 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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2answers
50 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. ...
2
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0answers
158 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 ...
2
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1answer
54 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
107 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
270 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
181 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
66 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
43 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
366 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
796 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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2answers
511 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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1answer
17 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
3k 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
104 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
365 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
1k 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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2answers
1k 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
2k 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
105 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
201 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
61 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
2
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1answer
62 views

A Raspberry Pi 3 Model B boot problem which happens after the very first installation of Raspbian

Recently I experienced a breakdown of the SD card on a Raspberry Pi 3 B (no B+) I use as a courtesy PC for my nieces/nephews. Since I had two SDHC 8GB cards, I did not worry too much and Downloaded ...
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0answers
26 views

Flashing of LED

This is my first post here so HELLO and sorry if I'm posting in the wrong place. I had assigned a time limit of 40s for led blinking. Can I pause the blinking of this led and make another led to blink ...
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0answers
33 views

connecting a LAN device to openvpn through raspberry pi network bridge

hi i have recently set up a raspberry pi to be a network bridge for my router to my room as i thought it would be quicker to do than wait for the delivery of a plug in network adapter in this lock ...
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0answers
247 views

Compile Linux kernel with toolchain built for aarch64 and uClibc

I am using RPI3 model B I have compiled toolchain using crosstool-ng with the following sample. ./ct-ng aarch64-rpi3-linux-gnu Using ./ct-ng menuconfig, I changed C library from glibc to uClibc. ...
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2answers
55 views

I need to connect my Pi to a piece of hardware via fiber that only responds to rs232 commands [closed]

I have an Ethernet to fiber converter that I can interface to the PI but I am not sure how to or if its even possible to setup the ethernet connection with the fiber convertor to pull data via rs232 ...
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0answers
385 views

Cannot log in to raspbian buster with default username and password

I have an issue logging in to my new raspbian buster (raspbian 10 Raspbian Buster with desktop and recommended software) using the known default {pi, raspberry}. My keyboard is in English and I have ...
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0answers
77 views

Is my PI broken or the LCD screen?

So I have an LCD screen which plugs into the pi. The pi works fine, but when I do the whole LCD-show in the terminal and it restarts it stops at either “starting login service” or “starting message ...
0
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1answer
27 views

Raspberry pi 3 with centos 7 error

i have problems with my raspberry pi 3. I use windows 10 on my laptot and it is ethernet connected. I have installed centos 7 into a micro sd through Universal-USB-Installer (centos is without any ...
1
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1answer
98 views

How to use an lcd panel as keyboard?

I'm quite new to raspberry pi and custom Projects but I'd like to use an lcd touch panel like this (https://bit.ly/39HZpe4) as a keyboard for my raspberry pi 3 model b. I saw this in this video: ...
2
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2answers
3k views

Error in pyarrow while installing Apache Beam in Raspberry Pi

I'm using a Raspberry Pi 3 B+ and should be installing the Apache Beam SDK to connect it to Google Cloud Platform services such as Pub/Sub, Dataflow, and BigQuery. I've got Raspbian GNU/Linux 10 (...
2
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2answers
168 views

Raspberry Pi WLAN Bridge

I have a range extender on one side of the house but it gives out really poor signal and looks to be slowly dying. I have a spare UniFi AP that I want to use but no Ethernet connection on that side ...
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0answers
18 views

Connect access point to RPi's ethernet port

I get a public wifi in my living room, which I would like to extend for the rest of my house. I have an Android phone, RPi 3b and Belkin N300 wireless router. The setup I have in mind is Public ...
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0answers
38 views

pi 3 won't connect to the internet through an Ethernet cable

Overnight I left my pi on so it could keep up the website I am hosting but come day my pi was not connecting to the internet so as I had setup a static ip (router side) I decided to delete the ...
1
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2answers
480 views

How can I run a cross-compile binary on my RPi?

I compile a simple Hello World programm with different compilers (from https://github.com/raspberrypi/tools): ./arm-linux-gnueabihf-c++ ~/Desktop/hello.c -o ~/Desktop/myapp -static The compilation ...
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0answers
132 views

Adafruit BMP280 Temperature Sensor with Raspberry Pi

I am using Adafruit BMP280 Temperature sensor breakout board with Raspberry Pi 3 Model B. OS- Android things. I am using library: https://github.com/androidthings/drivers-samples/tree/master/bmx280 ...
2
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3answers
2k views

Folding@home on RPi 3 model B?

How to install Folding@home on RPi3 B on Raspbian, if it’s possible at all? The Folding@home download page does have 64 and 32 debian versions, but downloading them results in an error “A package ...
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0answers
46 views

Raspberry pi and ESP32

i am working on a school project and i need help with it. i have MQTT client code that will run on the ESP32.It polls the DHT-22 and publishes the sensor data to a topic called temp humidity. then i ...
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0answers
232 views

Pihole only resolves clients names on IPv4

I have setup Pihole on my Pi and evrything works except the client resolvement. Ipv4 adresses get resolved in the certain names i have set in my Router but IPv6 adresses dont get set. I have set ULA ...
1
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1answer
315 views

Will SDIO-mode second SD card conflict with integrated WiFi?

One is able to add a second SD card on RasPis by activating the SDIO interface. However, on the Pi 3 and Pi Zero, the integrated WiFi is connected via SDIO. Can you have both at the same time?
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2answers
139 views

My page doesn't record Data with Mysql and apache

intaxing.in/register.php or(website probably don't work) test.intaxing.in/register.php You can look here for the actual working page that did not record anything it just asks again & again for ...
1
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1answer
757 views

Installing the recommended software after install the desktop only version of raspian

I have installed raspbian buster without recommended software on my raspberry pi 3b+ and i am curious to see what are the recommended software. What do i have to do to install them on top of the ...
3
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0answers
93 views

Is it possible to control servos in both directions on the RPi?

I have been working on controlling servos in one direction with PWM control via GPIO ports on my RPi 3. I've worked with motor controllers that use PWM before and it seems that I should be able to ...
1
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1answer
55 views

After Power Failure, RPI now just cycles through boot sequence without booting

So some workmen were working at the house switch box which created multiple power failures for the RPI. Now it is not working. At first, it was just dead (red power LED, but nothing else) so I ...

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