Questions tagged [pi-3b+]

Use for questions specific to the Raspberry Pi 3 Model B+

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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 ...
ZenRen's user avatar
  • 11
2 votes
0 answers
77 views

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 ...
thomedy's user avatar
  • 29
0 votes
0 answers
48 views

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 ...
MCorgano's user avatar
0 votes
1 answer
305 views

I broke SSH access to my Raspberry Pi

I had my Raspberry Pi 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 ...
Dims's user avatar
  • 175
1 vote
1 answer
144 views

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, ...
snowjak's user avatar
  • 11
2 votes
2 answers
175 views

How to correctly identify the pin addresses in the Pi4J 2.2.1 GPIO API?

I can't seem to get the right pin number. Let's say I want to access this pin: What's the actual address of the pin? 11, 26 or what? Here's the code I use: (THIS CODE WORKS WITH PIN BCM 23) final ...
MomoTheDev's user avatar
0 votes
0 answers
35 views

Raspberry PI locking/unlocking system

I have a door lock connected to RPi and I would like to unlock and lock doors by remote control. My idea was to make a separate server in the Cloud and that this server pushes an event (lock/unlock) ...
user3568005's user avatar
1 vote
2 answers
62 views

RPI 3 B+ 3V3 Shorted to Ground, Pin 18 Shorted to ground. Can this be Saved or is Pin 18 a safe sign for a dead CPU?

As the title suggests. I removed the power managment chip already but 3V3 is still shorted to ground.Since the schemtacis arent complete i cant find all caps to test first.Can there be another issue ...
Marlon's user avatar
  • 11
1 vote
0 answers
38 views

Respond to GPIO in fastest way possible

I'm trying to respond to a trigger from a ~1MHz clock and I'm having trouble doing this in the time required (under 400ns). I'm using a Raspberry Pi 3b+ and I've seen benchmarks of 50Mhz+ for toggling ...
Robin Elvin's user avatar
3 votes
1 answer
161 views

Raspberry Pi doesn't boot after using 5v pin

I recently got a Raspberry Pi 3B+, and it booted just fine and worked properly. I also had a 12v latch solenoid (the solenoid worked when I connected it to a 9v battery). I connected one end of the ...
JohnmanJohnston's user avatar
-1 votes
1 answer
56 views

Does using a RPi 3B image on RPi 3B+ cause network issues?

I flashed a RPi 3B backup image into an RPi 3B+. The device booted and is working just fine. But I keep getting a bunch of network issues. The device connects to one of my networks but is unable to ...
James's user avatar
  • 1
0 votes
1 answer
378 views

Raspberry Pi 3B+ PMIC Replacement, 1V8 available for a while then no voltage again

I've done a PMIC replacement once on Rasp pi 3B+ and managed to get it working again. This is the second time I've done a PMIC replacement. The symptoms are exactly the same, PWR LED on, 3v3 and 1v8 ...
IEatCodeDaily's user avatar
0 votes
0 answers
32 views

Traces below micro-USB power

If I were to drill through the micro-USB power port on a raspberry pi 3 b+, would I drill through any important traces on the board? Concept Image below
HelpMe's user avatar
  • 1
1 vote
1 answer
75 views

Pi 3B+ & 4 cannot send SPI write over 128 bytes in PIGPIO C

I am using the pigpio C interface to drive an OLED, and cannot send transfers of over 128 bytes using the spi_write command. Apart from this spi_write works, as well as all other GPIO pin use for D/C ...
hal's user avatar
  • 13
2 votes
0 answers
55 views

Raspberry PI 3B+ losing connnection

I have a problem with my raspberry. I can connect to it using putty(ssh) or VNC Viewer, but after few minutes the connection drops. I still see it listed when i go to "connected devices" on ...
Albert B's user avatar
1 vote
1 answer
195 views

2 motors on L298N controlled with GPIO from Rpi3B .. python telling me channel already in use and motors not turning

I have adopted Electronics hub tutorial to run 2 motors from a L298N controlled by Rpi3B using GPIO. Why is my version of the code not working? I do understand that I could ignore the "channel ...
rozzers's user avatar
  • 13
1 vote
1 answer
548 views

how many threads for Rasp Pi B+ when running a script?

I am tinkering around with some computer vision code....and there is an argument for the script for the number of CPU threads to run the model. where it defaults as 4 where I am assuming this code is ...
bbartling's user avatar
  • 237
1 vote
1 answer
113 views

Create Wireless Hotspot doesn't work

I want to turn my Raspberry Pi 3b into a Wi-Fi Access Point, but i have the probleme as you can see in this image
mustapha_1234's user avatar
0 votes
1 answer
104 views

Peer-to-peer networking with ethernet

I had an idea for transferring data between Pi's. It involves directly connecting two Pi's to each other only using a single cat5 ethernet cable, and transferring data in a peer to peer manner. I have ...
DepthsDoes's user avatar
1 vote
1 answer
86 views

How to get measured(analog/digital) output from 801s vibration sensor? [closed]

I have Rpi3B+, 801s vibration sensor and a ADC. I need the analog output to plot a graph for analysis. Basically I need to observe how vibration is affecting the other properties of the machine. ...
Snehal Shende's user avatar
2 votes
0 answers
415 views

Wireless display with Raspberry PI 3

So, I Googled around for this, but it feels like almost all questions on the internet about this kind of thing are "how to stream from my laptop to my pi". I was wondering about the other ...
dkasipovic's user avatar
0 votes
0 answers
69 views

How to mimic RC signals using raspberry pi?

I am working on an automated Quadcopter and I am trying to build a flight controller using Arduino board and raspberry pi. I don't want to use a transmitter and receiver in this project instead wants ...
HIMANSHU VERMA's user avatar
1 vote
0 answers
51 views

No FIQ.h on Raspberry PI3B+

I was exploring the FQI routine for ARM processors. I noticed that most Linux kernels provide a fiq.h header file yet my RPi does not seem to have it. Using find does not return anything. My Linux ...
Robin Y's user avatar
  • 21
1 vote
0 answers
187 views

How to Define USB Port as a Stable Name on Raspberry PI 3B+

In my Pi, on the /etc/udev/rules.d/10-local.rules file ACTION=="add", SYMLINK+="USB4", ATTRS{devpath}=="1.5" ACTION=="add", SYMLINK+="USB1", ATTRS{...
Dheeraj SmartIam's user avatar
0 votes
0 answers
104 views

Hostapd on Pi Connection failed

I am using a PI 3B+ and the Rasbian light Version on it. I build the hostapd on my PI with wget, so that i can make modifications on it. After building and starting (build and make) the hostapd, ...
User19922's user avatar
0 votes
1 answer
72 views

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 <...
thomedy's user avatar
  • 29
-1 votes
1 answer
90 views

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 ...
Petr's user avatar
  • 117
1 vote
3 answers
148 views

Stop docker container on unmount

I'm trying to debug something that I don't quite understand well. I have setup an automount of an external drive with: /etc/fstab UUID={RANDOM_UUID} /media/pi/Storage ext4 defaults,nofail,x-systemd....
German Casares's user avatar
0 votes
0 answers
50 views

Raspberry Pi 3b - Undervoltage problem after using same power supply and cable

I have been using RPi 3b for several months with a set of power supply and cable. I recently upgraded raspbian to Bullseye. That was also fine. I added a camera today and then on RPi is not booting. I ...
Guru's user avatar
  • 1
0 votes
0 answers
421 views

How to rotate the raspberry pi touchscreen 180 degrees?

I have a raspberry pi 3 b+ running Raspbian Bullseye with the raspberry pi official touch screen. The display is upside down. I've tried rotating with the Screen Configuration tool, but it doesn't ...
user17929085's user avatar
2 votes
3 answers
576 views

Board getting super hot, what's wrong with my Raspberry Pi 3?

So I was about to benchmark cooling techniques to cool my raspberries when I noticed that my RPI3B Rev 1.2 board was getting abnormally hot out of the box when booting a vanilla Raspbian from the SD ...
Dominik Antal's user avatar
1 vote
0 answers
114 views

Incorrect values coming from 4-20mA ADC receiver

This is what I have. Raspberry Pi3 i2c shield. https://store.ncd.io/product/i2c-shield-for-raspberry-pi-3-pi2-with-outward-facing-i2c-port-terminates-over-hdmi-port/ 1-Channel 4-20mA Current Loop ...
Kevin Vasko's user avatar
0 votes
1 answer
1k views

Unable to Rotate Display

I recently purchased an 8.8in display from AliExpress (8.8inch IPS HSD088IPW1 Long strip display Stretched Bar HDMI compatible Display Aida64 monitor USB 5V Power Second Display Case) (https://www....
Netrok's user avatar
  • 11
0 votes
1 answer
65 views

SSH Login Not Working

I have an SSH server running on my PI. On my other device I run ssh ucyt5040@localhost -p8022. It asks for a password. I enter my password. I get Permission denied (publickey,password,keyboard-...
UCYT5040's user avatar
  • 103
0 votes
1 answer
149 views

Cant install hostapd

So I removed hostapd with sudo remove hostapd but the folder /etc/hostapd still exist but even when I use sudo apt install hostapd it won’t bring back /etc/hostapd/hostapd.conf or the other ...
Agent Blade's user avatar
1 vote
0 answers
104 views

Can I use overlay filesystem on an expanded filesystem?

I've used raspi-config to activate overlay filesystem and made the boot partition read only. As I was running out of space I decided to use raspi-config to expand the filesystem to fill the entire SD....
Kantia Boy's user avatar
0 votes
0 answers
137 views

why i can't run use command python3 but it work on thonny python

it work here but it get erro when i use commend. this erro that i get 192.168.247.109 - - [15/Jul/2022 19:46:59] "GET / HTTP/1.1" 200 - OpenCV Error: Assertion failed (!empty()) in ...
ArisFYP's user avatar
0 votes
1 answer
54 views

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/...
pbnjdog's user avatar
-1 votes
1 answer
66 views

Bs250 transistor as switch

Hi so I have button connected to pins 5 & 6 on rpi3. This is to "power it on"... The button is also connected to another gpio 18 pin and python script listen for change and when it's ...
joural's user avatar
  • 1
0 votes
1 answer
379 views

I2C communication on Raspberry Pi 3B using smbus2

I'm trying to connect my energy measurement IC with Raspberry Pi 3B using the I2C protocol. I'm using sudo i2cdetect -y 1 to detect the connected devices and it is correctly showing the address(7-bits)...
Satya Prakash Singh's user avatar
0 votes
0 answers
112 views

Problem with WIFI

I have a Pi 3B + and installed bullseyes ago to two month and not it detected wireless wifi, it say No wireless. I does tried with raspi-config, enable wifi and it say no wireless. so i does tried ...
Omr Bargo's user avatar
0 votes
1 answer
58 views

Bridging two WiFi networks without a dongle

I would like to connect my Raspberry Pi 3B+ to a WiFi network and use it as an access point for its own network. I need it to act as a proxy so that I can connect multiple devices and they appear as a ...
Th1048576's user avatar
0 votes
0 answers
44 views

SSH is not working on RPI? [duplicate]

My Rpi was working fine before. after I power it up again it and accessing via ssh [email protected] and its returning "permission denied, try again". then I have done some changes in root/...
saman naz's user avatar
0 votes
1 answer
144 views

Connect 2 RC522 to Raspberry Pi

I wanted to connect 2 RC522 to my Raspberry Pi. I Followed the instructions from here. But then I got the error message: /usr/local/lib/python3.9/dist-packages/mfrc522/MFRC522.py:151: RuntimeWarning: ...
Martin's user avatar
  • 9
2 votes
3 answers
888 views

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?
S. ten Brinke's user avatar
0 votes
0 answers
128 views

bluetooth network traffic monitoring

Is there anything that I can use to monitor my Bluetooth traffic just like the resource monitor in windows? I encounter nethogs in raspi but it only monitors wifi network. I want to know the B/sec of ...
ambangeles's user avatar
0 votes
2 answers
482 views

How can I read the current ALT-Mode of a GPIO PIN?

i have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. Out of personal Interest, ...
Manuel Neff's user avatar
1 vote
1 answer
345 views

Raspberry Pi 3B+ board SMT component identification

i'm a college student so i cheaped out by buying a physically damaged RPi 3B+ planning to repair it myself (also as SMT soldering practice) but am having some difficulty identifying the damaged parts. ...
petemoss0's user avatar
0 votes
0 answers
141 views

I2C OTHER PINS IN RASPERRY PI FOR I2C LCD

I am planning to put a power button on my raspberry pi 3b+ which uses the PIN 5 in order for me to shut it down and turn it on again when I wanted to. However, pin 5 is I2C CLOCK which is used for the ...
ambangeles's user avatar
1 vote
1 answer
1k views

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 = ...
bfris's user avatar
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