Questions tagged [pi-3b+]
Use for questions specific to the Raspberry Pi 3 Model B+
1,144
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raspberry pi as gateway lan/wifi
I bought Raspberri Pi 4 and installed predefined OS on it (I am using it headless). Raspberry pi is not connected to internet.
Now I need to do this:
in RPI Lan port is connected computer (device), ...
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1
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3
answers
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How to toggle button on and off with gpiozero?
I can't seem to find a solution of doing this using gpiozero. I've done it using rpi.gpio with add_event_detect and call back to change state but I was under the impression gpiozero is much simpler.
...
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21
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4
answers
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How to emulate Raspberry Pi in QEMU?
A few years ago, people were saying they were able to emulate a Raspberry Pi 2 or 3 in QEMU.
However as of late 2020, I am unable to do so.
Can anyone let me know what the correct command line ...
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1
answer
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Difference between iface wlan0 inet manual and iface wlan0 inet dhcp in wifi to ethernet router?
I have developed a wifi to ethernet router. Wifi is connected to my home router having internet and ethernet is connected to my laptop( just for testing).My laptop is not getting internet, but it gets ...
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2
answers
568
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I think I fried my RPi
I am working on two stepper motors and trying to control them using RPi3(Ubuntu mate) with A4988 motor drivers. I successfully managed to drive the motors with external 12V battery source. After ...
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1
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3
answers
43
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Checking angle of servo motor with a Raspberry Pi 3B+
I was trying to check the angle of a servo motor using my Raspberry Pi 3B+. Although when i run the code the servo motor jumps to 90 degrees (physically) and returns an angle of 0.0 in the terminal. ...
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1
answer
31
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How can I monitor for an incoming Wake on Lan packet?
I am using a Raspberry Pi to power on a computer that is not capable of Wake on LAN. I want to send the already on Pi a WoL packet and trigger a relay with the GPIO pins. I am having a bit of trouble ...
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0
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2
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3k
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How to interface MLX90614 temperature sensor with Raspberry Pi
I have a mlx90614 sensor and I am interfacing it with raspberry pi 3 B+. I am using adafruit library python. Below is the code:
import Adafruit_GPIO.I2C as I2C
I2C.require_repeated_start()
class ...
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0
votes
1
answer
558
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Cannot log in to raspbian buster with default username and password [closed]
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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1
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1
answer
63
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Raspberry pi camera module 3 works only on libcamera
I recently bought a Raspberry Pi 3b+ and Camera module v3. After days of troubleshooting, I got the camera to spit out images on the libcamera CLI. But, I can't create a picamera.PiCamera object in ...
- 113
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4
answers
420
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Rpi3B+ ssh session drops randomly
I have a Raspberry Pi 3 Model B Plus Rev 1.3 in my Ethernet network that runs headless with octoprint and an arduino pro mini connected to it via i2c. Wifi is disabled. The Rpi is powered from an ...
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0
votes
1
answer
550
views
Raspberry Pi running python opencv on php
I try to use the php running the python:
<?php
$command=shell_exec('sudo python /var/www/html/FacialRecognition/simpleCamTest.py 2>&1');
echo $command;
?>
But the result show in ...
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1
vote
1
answer
56
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I can't get My BLDC (Brushless DC motor) to run
Goal
Use Pulse Width Modulation (I think that is the standard approach) to control the speed of my BLDC.
I have tried so many things
#include <stdio.h>
#include <inttypes.h>
#include <...
CommunityBot
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0
votes
1
answer
320
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Issue after a few hours of correct operations over wifi shared between an access point and a wifi client
I have a Raspberry Pi 3B+ running Raspbian 32 bit. It runs correctly as an access point and a wifi client over the integrated wifi. It does not use systemd-kerneld.
I followed the different steps ...
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1
vote
1
answer
424
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Pi 3 B+, 7" official touch screen and a Sense Hat query
New here, but wanted to ask about the above.
My Pi 3 B+ is connected to an official &" Touchscreen display, which uses a double adaptor to provide power to the Pi and scren. This work fine.
...
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0
votes
1
answer
48
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Unable to record video with RPi-Cam-Web-Interface with USB mounted
I am trying to record a video using RPi-Cam-Web-Interface on my Raspberry Pi model 3 B+ and saving it on my thumb-drive.
However, when trying to record a video with my thumb-drive mounted to /var/www/...
CommunityBot
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3
votes
1
answer
73
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After kernel update windows appear stuck in the corner
After updating with apt yesterday, all new windows show up cropped in the upper left corner of the screen. See screenshot. I do not know if this is related. I have set the Desktop Preferences to ...
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1
answer
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3B+ fails to boot Ubuntu mate
I have the problem that the bootloader and kernel are too old in the mate image to run the on the new hardware.
Raspian works fine with a noobs install.
I tried the advice in the thread here
https:...
CommunityBot
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2
votes
1
answer
259
views
Timed trigger for GPIO input
I'm running a raspberry pi system that records fish as they swim passed an IR break beam sensor at a fish ladder. So far the system works well but I'm trying to cut down some of the false triggers. ...
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-1
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1
answer
295
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Raspberry Pi wont boot (Act led blinking 4 times)
I have 2 Raspberry`s (Raspberry Pi 3 B+).
One is working fine and well and if I want to turn on my other Raspberry Pi(with the same SD Card what I used for the other) the ACT LED is just blinking 4 ...
- 531
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0
answers
16
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LAN7515 replacement USB controller chip
a defective video cable shorted pin 1 + 2 of GPIO shortening QFN regulator MXL7704-03. Replaced and WORKING but
LAN7515 which has built-in USB controller had fried too and USBs DONT WORK!!! i DONT ...
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0
answers
44
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RPi 3B+ & Yocto & U-Boot : free UART pins to be available for a RS232/485 HAT
I have the following hardware/software setup:
Sferalabs StratoPi Base (Raspberry Pi 3B+ with a HAT for RS232/485)
Distro built with Yocto and meta-raspberrypi on thud branch
U-Boot
SysVinit
I want ...
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1
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1
answer
32
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LXDE-pi -- cannot show desktop on local monitor, but VNC is fine
I'm setting my RaspberryPi 3B+ (Debian Buster) up as a magic mirror. I've run into a really weird issue that I can't wrap my brain around.
The magic mirror software is basically an EletronJS app, ...
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1
vote
1
answer
395
views
How do I rotate LCD touch panel on a Raspberry Pi 3?
I know this question has been asked many times, but I can't find a solution that works anywhere to rotate the official raspberry pi touch screen (not the display part as this is working, just the ...
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0
votes
1
answer
42
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Surely I can run sox with alsa without pulseaudio
Why would I want to do that? because pulseaudio isn't needed (presumably) and pulseaudio does not want to run as root. In theory I should be able to run pulseaudio --system to fix the problem, but I ...
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1
vote
1
answer
245
views
Media server without internet?
On my phone I have the Foobar2000 app which allows me to play music through media servers.
On my Raspberry Pi 3 Model B+ I connected a USB stick and set up MiniDLNA.
This works fine but I figured it ...
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1
vote
3
answers
166
views
How to choose a suitable display for pi 3 B+?
I'm currently looking for a display 5 inches or less for my PI, but there are a lot of information and since I'm quite new to the world of raspberry I'm looking for some help and guidance on where ...
CommunityBot
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3
votes
3
answers
291
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Raspbery Pi 3B+ - My USB ports don't work, but ethernet does
This is a pretty short question.
My ethernet port works, but none of the usb ports seem to do anything when I plug anything in them. This is the case with a fresh raspi os image.
How can I debug this?
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0
votes
2
answers
38
views
Unable to connect to raspberry pi 3b over minicom
I want to connect to my raspberry pi 3 model B V 1.2 to minicom using serial cable. I have attached serial cables to correct pins like this.
image of my setup
I have installed raspbian from the ...
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2
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0
answers
137
views
Postgres ERROR: SSL SYSCALL error: Connection timed out
I wanted to develop an app with Python that would run on a Raspberry and be remote controlled. This app should control (switch on and off) 2 leds based on the current day, time and the user's ...
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1
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738
views
Cant install php
I'm kind of new to the linux os and I'm having trouble installing php. i needed a few tools for jasper which alwys show up in the error message.
sudo apt-get install php -y
Reading package ...
CommunityBot
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2
votes
1
answer
403
views
Cant install libnssutil3 on raspberry pi 3b+
i have a Raspberry pi 3b+ running the latest version of Retropie. and i have a kodi port installed on retropie.
I also have installed a Netflix plugin but when i try to open any video of netflix i get ...
1
vote
2
answers
105
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How can i set up my owm serial communication between two Raspberrys?
i have following Problem:
I have A raspberry Pi 3B+ with a Touchscreen, which uses every Single Pin on the 40Pin GPIO header. The only thing i have is a i2c breakout on my Touchscreen. But i have the ...
CommunityBot
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2
votes
1
answer
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Rpi3b+ to Rpi3b+ jtag/SWD connection and OpenOCD
I'd like to hook together two Raspberry pi 3b+ to use jtag/SWD with OpenOCD. I learned it can be done, but implementing it has proven challenging. I have two questions:
How to connect the Rpi's. If I'...
CommunityBot
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2
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4
answers
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Is there a code for the power LED blinking (I've noticed a pattern) or is it simply "blinking" and that's it?
I recently got my first Raspberry Pi (model 3 B+) plus a starter kit from Adafruit, and I have encountered my first challenge: boot the darn thing. The starter kit came with a micro SD with NOOBs ...
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0
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0
answers
28
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Raspberry pi 3 not reading SD cards
I have a raspberry pi 3 v1.2 that is not reading SD cards. I DO have another pi 3, and that one reads and boots with the SD card in question without any issues whatsoever. On the working pi, I can ...
- 141
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1
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why frequency output is not constant?
[![I uploaded piscope image and same time output image also for better understanding of issues][1]][1]I am using sample code of Pypi from "http://abyz.co.uk/rpi/pigpio/python.html" to detect ...
CommunityBot
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1
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1
answer
146
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Raspberry pi + L298 H bridge motor speed reduced when battery circuit shows 50%
I made a raspberry pi car. The pi is powered by two 18650 (Breewell New Multipurpose Flat Top 18650 Battery 2000 mAh 3.7 Volt Lithium Genuine Rechargeable Battery -Pack of 2 https://www.amazon.in/dp/...
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1
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1
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145
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PIServer network boot
When i boot a raspberry pi model 3b+ from the piserver running on debian stretch x86 i get the follow error :
---[end Kernel panic - not syncing : VFS : unable to mount root fs on
unknow-block(2,...
CommunityBot
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1
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3
answers
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AM2302 no signal using Raspberry Pi 3
I am trying to setup a AM2302 (DHT22) to use with Raspberry Pi, and unable to get a signal. What I need help is to be able to conclude whether the problem is due to (1) sensor fault (2) wiring fault (...
CommunityBot
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1
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2
answers
593
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Issue when installing python-package virtualenvwrappe
I am new to Linux and Raspberry Pi, so I am sorry if this is a trivial question or if I did not mention some important information.
To my problem:
I have a fresh install of Raspbian Stretch on a ...
CommunityBot
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2
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0
answers
42
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How do I turn an brushless dc motor 1 cycle per second using pigpio and c++
I am using an esc and a bldc and im trying to slowly spin my bldc
I can get my motor to spin with
gpioServo()
but when I use
gpioPWM()
It just continues to beep
when i use
gpioServo()
it spins way ...
- 31
1
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1
answer
625
views
RPI Motion service delay on restart
Is there any way to delay the start of the Motion service on RPI restart?
I'm having an issue where v4l does not make it yet to provide /dev/video0 but Motion is already trying to open it and ...
CommunityBot
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1
vote
1
answer
185
views
ReSpeaker 2mic drivers can't be installed on Pi 3b
I’m trying to set up a ReSpeaker 2mic Pi HAT. Emphasis on trying.
According to the instructions, i’m supposed to do this:
sudo apt-get update
sudo apt-get upgrade
git clone https://github.com/...
CommunityBot
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0
votes
3
answers
786
views
How fast I can read at raspberry pi 3 model b's GPIO
I want to read the output of OV7670 camera module that produces 8-bit output at a very high frequency. The output pixel clock frequency is around 8MHz. I have to sample those 8-bit data at raspberry ...
- 109
3
votes
2
answers
1k
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Keyboard and mouse don't work in GUI
I've tried to include as much information as possible, but if it isn't relevant I will remove it.
I purchased a Raspberry Pi 4 months ago, and I've been using it to run some CRON jobs. I have a ...
- 231
0
votes
1
answer
78
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I broke access to my raspi with uhubctl
I had my Raspi 3B+ running old raspbian Jessy. I was connecting to it by ssh. I have installed uhubctl.
uhubctl is a tool which can turn off power supply for USB port.
I got
# uhubctl
Current status ...
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1
answer
448
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How to install the command WL
I installed the utility wl to enable some radio test:
sudo apt-get install wl
The added files are :
/var/lib/emacsen-common/state/installed/wl
/usr/lib/emacsen-common/packages/remove/wl
/usr/lib/...
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0
votes
2
answers
403
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Making the VCNL4040 proximity sensor work on Python
I purchased the SparkX module with the VCNL4040 proximity sensor you can see here:
to use this sensor via Python, but on the repo for the Adafruit library it seems like the library is not available ...
CommunityBot
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1
vote
1
answer
551
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reading two webcams in opencv
If I run this code on a PC with two webcams attached it runs fast (or fast enough) without any issues:
import cv2
cap0 = cv2.VideoCapture(0)
cap1 = cv2.VideoCapture(1)
while True:
ret0, img0 = ...
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