Questions tagged [pi-3]
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
3,540
questions
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14
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How to enable overlayfs (read only mode) on Raspberry Pi 3B + Raspberry Pi OS (Bookworm)
I want answers from people who deeply understand what changes get made under the hood, because so far the raspi-config method has not worked, nor has painstakingly stepping through that script ...
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0
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9
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Raspberry Pi 3b.Platform [duplicate]
I have just purchased a new Pi3b to set up as an MMDVM hotspot, the following is this genuine.
Platform:Raspberry Pi 3 Model B Rev. 1.2 armv7| 1GB - Stadium China - Board # a52082
OS: Raspbian GNU/...
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answers
18
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Cannot ping pi, unless pi is actively pinging something else
Reloaded raspbian again and things seem to work. :)
Pi 3b+. Just reloaded rasbian with the newest version and now I am unable to ping the pi or SSH into it.
I have three other windows computers that I ...
- 1
1
vote
1
answer
25
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Package 'libpng12-dev' won't install? Trying to setup OpenCV for object detection
I'm trying to setup OpenCV for object detection on my Raspberry Pi 3 model B. I'm using the 32-bit Legacy OS, as it's recommended for this application.
When running the command
sudo apt-get install ...
1
vote
0
answers
14
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Resampling and stutter - pulse audio
I have been fiddling with GQRX, an SDR radio piece of software that exports sound sampled at 48 kHz either directly to the local pulseaudio daemon or via UDP.
Issue is stutter in the speakers. Happens ...
- 111
0
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16
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No video on vlc and other errors - raspberry PI 3A+ (Escape room project)
it's an amateur here trying to help a friend with an escape room project. Briefly explained: the raspberry will receive a GPIO signal from an item in the room, then a 60 seconds video will immediatly ...
0
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0
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57
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Raspberry Pi 3B shows a screen with an underscore in the corner
I am using a raspberry pi 3B v1.2 with a 3.5 inch kuman display as shown here. I have installed the lcd-show drivers by doing this:
sudo rm -rf LCD-show
git clone https://github.com/goodtft/LCD-show....
0
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0
answers
39
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Advice needed on how to connect a 12V solenoid valve to a Raspberry Pi
I'm a begineer to using the Pi and want to build a simple watering system for some plants. I know there's lots of online articles but looking for some clarification on exactly what is needed. Here's ...
- 101
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22
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Establish Audio Connection between raspberry pi 3 and 4G HAT with a TRRS cable
I have a Raspberry Pi 3 with an external USB soundcard plugged in. The RPi is connected to a 4G hat (Waveshare SIM7600 4G HAT). When I plug in a headset to the AV Jack of the hat, I can send and ...
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answers
35
views
Problem with sending and receiving IR signal to enable the projector Epson
I use the Raspberry Pi 3 with the Raspbian terminal OS and work on a project that includes managing the Epson EH-TW750 projector through an IR transmitter and receiver.
I successfully used irrecord ...
0
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0
answers
63
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VLC segmentation fault when trying to play video RPi 3b
I see it complains about not finding a proper vout display in stack trace, but! It works fine on another RPi somehow. Please help. I had to chop off some lua and alsa debug info in the middle because ...
0
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0
answers
72
views
Capturing video stream from raspberry pi on a laptop
Goal:
I am part of a college engineering club building an ROV submersible. We're using a Raspberry Pi 3B running vanilla Raspberry Pi OS to process the video feed. The Pi will be tethered to a surface ...
0
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0
answers
42
views
No image when booting lastest Armbian or RaspberryPI OS using ultrawide monitor
How can I force a smaller display resolution (if that's the real issue) on boot for minicomputers like RaspberryPI or OrangePI when using RaspberryPI OS or Armbian?
I've been trying to use them on my ...
- 101
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17
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RPi 3 Model B not detecting input audio from Behringer Wing
I want my Raspberry PI model B to detect the audio output of a Behringer WING digital mixing table. I am using a powered USB hub to connect the USB-B to the USB-A port on the raspberry. But for some ...
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0
answers
34
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I2C Sensor Returning 0's on Pico but works Perfectly on RPi 3
I'm at my wits end over an ENS160 sensor I have working perfectly with a Raspberry Pi 3 (running full Linux OS and Python), but refuses to return any data when interfacing through a Raspberry Pi Pico ...
1
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0
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82
views
Can't find any Bluetooth devices
I can't connect any bluetooth device to my Raspberry Pi 3, because it simply doesn't list the devices:
I checked the peripherials that I wanted to connect to my pi, and they are discoverable by my ...
- 11
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1
answer
24
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Receiving String Data From Secondary Arduino on Main Raspberry PI I2C
I am working on a project where I'm trying to implement 14 RDM630 RFID sensors that will send any recorded RFID tags to the Main RPi. Unfortunately, these sensors use RS232 communication, and it seems ...
0
votes
3
answers
98
views
trying to do the project musicfig problem with python-usb
I'm currently trying to do the project made by Dennis Mellican about using a raspberry Pi with the lego dimension platform.
He made a step by step guide here https://codeburst.io/my-lego-minifigures-...
- 3
-1
votes
1
answer
89
views
RPi not turning GPIO pin off causing the relay to remain on
I am a complete newbie here. I bought RPi, flashed the OS. I also bought 5v relay. I have connected the 2nd pin to VCC of the relay, 6th pin to GND of the relay, 40th pin to the 'IN' point of the ...
- 99
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0
answers
42
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How to enable Bluetooth on the Raspberry Pi 3B with Void Linux?
I have a RPI 3B with Void Linux, I've searched a lot on Google how to enable Bluetooth, but I can't find solutions.... Here are the things I have already done:
Followed to the letter the indications ...
- 11
0
votes
1
answer
48
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Error on raspberry 3B+ when updating and installing opencv
I am a student in Vietnam, working on a project for my embedded course and encountered this error on raspberry 3B+, please help.)
pi@raspberrypi:~ $ sudo apt-get update
Hit:1 http://archive....
- 1
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votes
2
answers
157
views
Bluetooth audio issue
I'm running a 'bullseye Lite' system (i.e. no GUI), and trying to get it to play audio through a connected Bluetooth speaker. I'm not having much luck. I tried following an earlier approach (worked on ...
- 22.6k
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1
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144
views
Gpio export fails
Trying to build Blink application from Visual Studio sample for PI. Build system runs command sudo gpio export 17 out
Command return error:
gpio: Unable to open GPIO direction interface for pin 17: No ...
- 163
1
vote
0
answers
128
views
gstreamer pipeline doesn't play when using `omxh264dec`
I would like to decode H.264 video with gstreamer, taking advantage of hardware acceleration on a Raspberry Pi 3 Model A+.
My pipelines work when using avdec_h264, but when I substitute this for the ...
0
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0
answers
116
views
Playing audio using pwm
I am a beginner and confused regarding playing sound over pwm on raspberry pi 3. I have added the following line in /boot/firmware/config.txt:
dtoverlay=audremap,pins_12_13
I have my speaker connected ...
0
votes
0
answers
22
views
UART Issues without USB Power
I'm experiencing an issue with UART communication when I attempt to power the RPi over the 5V pin instead of the USB port.
Here's a rudimentary look at my setup:
RPi 3B -> Teensy 4.1
GND -> GND
+...
-1
votes
1
answer
44
views
Python script started by crontab ends immediately
I'm trying to start a python script using crontab that runs in the background. I want to restart it every few hours, but for now I'm trying to test it every minute to make sure the crontab is working. ...
- 1
0
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0
answers
20
views
RasPi3B+ won't read SD cards
As stated the old rpi 3B+ worked fine until 1 boot where it no longer read the SD cards. (ACT light not lighting up at all, PWR light constantly on.)
Happened after I tried swapping from dynamic IP to ...
- 1
0
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0
answers
106
views
GSM1: No answer, put_command expected (OK)|(ERROR)|(0)|(4)
smstools3's /var/log/smsd.log keeps giving:
GSM1: Checking if modem is ready
GSM1: -> AT
GSM1: Command is sent, waiting for the answer. (5)
GSM1: No answer, put_command expected (OK)|(ERROR)|(0)|(4)...
- 161
0
votes
1
answer
54
views
Multispectral camera
I would like to use a NoIr camera and an rgb camera in order to do calculations with the near-ir band and the RGB bands. Is there a way I can get near-ir values from the NoIr camera?
- 1
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0
answers
27
views
How do I boot only off a USB drive (with no SD card inserted)? [duplicate]
Do I need a MicroSD card for my Raspberry Pi 3 B, or can I simply use a USB flash drive (and no MicroSD card)?
- 161
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0
answers
266
views
Achieving high FPS on multiple still image captures
Trying to achieve a good 30 fps on Pi 3 Model B using the old 5MP camera module 1.3. Recently downloaded OS Bullseye, and using PiCamera2 on Python.
The goal is to achieve:
Good FPS ~30FPS for a 100~...
- 101
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0
answers
9
views
Connecting pi to a ion counter having rs232 port
i having two radio modules which are connected with pi, one will be attach with computer and the other will be attach with ion counter having rs232(i am using rs232 to uart converter) i have an app ...
0
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0
answers
22
views
Raspberry 3 to tether internet to the ETH port from the wi-fi
I would like to use the raspberry to bridge the WI-FI network and the ETH0 port and then connect a router to create my personal network with internet access (if possible DHCP on the router) accessible ...
-2
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1
answer
336
views
SOLVED Incorrect baud rate on RPI 3 serial port
I have written an app to communicate with an intelligent UPS. It works fine on a Raspberry Pi 2, but seems to operate at the wrong baud rate on a Raspberry Pi 3 model B running Raspbian bullseye.
This ...
- 107
1
vote
1
answer
1k
views
Pi 3B+ and USB Power to SSD
I have a Pi 3B+ which I'm using as a home media server - it has been connected to an old 2TB Seagate HDD (with its own external power supply) for a couple of years and running openmediavault software. ...
- 113
1
vote
1
answer
171
views
Correct cross-compilation options to run binary on Raspberry 3 model B
I have Raspberry Pi 3 Model B with me. I am developing on Ubuntu Linux laptop computer. I want to cross-compile so that the binary may run on Raspberry. My Raspberry info:
pi@raspberrypi:~ $ cat /proc/...
0
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0
answers
249
views
Raspberry Pi Camera v2 not detected for Octopi on Raspberry Pi 3
I've searched all over the internet for a solution to my problem, but it seems like every route comes up short for me. Again, I am using a Raspberry Pi 3 with a Pi Cam v2, and using PuTTy as my SSH.
...
-1
votes
2
answers
88
views
Can a gpio pin be read as an input without voltage going through? [duplicate]
I have pi 3 and I want to use one of the pin as an input. It will be connected to tapped off wires from a switch that has 2 volts going through it when it is closed. So I want to feed this 2 volts as ...
- 1,063
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1
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52
views
How to Access corrupted Raspberry Pi SD card using Ethernet Connection
I have Raspberry PI with Corrupted SD card, showing Kernel Panic Message, is there any way i can access it without removing SD card from SD card SLOT, raspberry pi is connected with Ethernet, which is ...
- 23
1
vote
1
answer
506
views
How to Convert 32GB Cloned SD card Image to small size ISO file
I have have 32GB SD card Cloned Image of Raspberry PI, I want to make it small size as Flashing back to another SD card takes more time using DD command, I need a small size image so that i can place ...
- 23
1
vote
0
answers
265
views
How to Change Raspberry pi 3 Boot order to Network boot with SD card Inserted
In Raspberry Pi 3 board, I am able to boot from network by changing the boot order to Network Modes as below :
sudo apt-get update
sudo apt-get upgrade
echo program_usb_boot_mode=1 | sudo tee -a /...
- 23
1
vote
2
answers
311
views
Unable to use my SIM900A Mini GSM module with my Raspberry Pi 3 B
I'm trying to connect my Raspberry Pi 3B with my SIM 900A Mini GSM module:
I'm facing the following issues ( maybe they are related, maybe not )
GSM module doesn't work.
I've put in a 4G sim card, ...
0
votes
0
answers
115
views
How to install Veloview for Velodyne on Rasberry pi 3 model b plus?
I have installed 64 bit rasberry pi os on rasberry pi model b plus, I have downloaded Veloview tar.gz file from their website that was under the linux 64 bit category. I am worried whether there is ...
0
votes
1
answer
61
views
Convert from physical pins to I2C
I have a QR code scanner that uses wiegand protocol, have used this code for it, it worked fine for physical pins, but now I have another board onto the Pi, an extender board that uses i2c protocol, ...
- 3
0
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0
answers
51
views
WS2812B addressable led does not turn on after a certain point
I control thousands of leds using WS2812B led with Raspberry Pi 3. But since I have two different led types (both ws2212b), I use two different pins. Logically, I connected a 5V 10A power supply to ...
0
votes
1
answer
453
views
Brother Printer not in the CUPS list
I am using Raspberry Pi 3B+. I am making my printer - Brother DCP-T300 wireless using Raspberry Pi. But, I am not able to make it run.
In the option of choosing the make, Brother was not present.
So, ...
0
votes
1
answer
920
views
Troubleshooting "Failed to start dhcpcd.service on all interfaces" - Buster on Raspberry Pi 3
We have been testing "PiSignage", an opensource digital signage solution, on a Raspberry Pi 3 running Buster. We have a webserver that is hosting a webpage we intended on using as an "...
0
votes
1
answer
1k
views
Missing /sys/class/leds/led0 and /sys/class/leds/led1 directories on Pi3 Model B Rev 1.2?
I have two RPis one 3B Model 1.2 one 4B. I set up both as subnet routers for Tailscale and wanted to turn off both the Power/Activity and Ethernet LEDs (all the LEDs). I put PiOS 64 Lite (Bullseye) on ...
- 3
1
vote
1
answer
113
views
GPIO behaviour on booting RPi
I have a question regarding the GPIO status during the boot process.
As a bit of background, I'm currently building an automated sprinkler setup using a raspberry pi and an 8-relay board.
The board ...
- 13