Questions tagged [pi-3b+]

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

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5answers
4k views

Raspberry Pi 3 B+ Low voltage warning

I have 10+ various older model RPis running already. I bought 2 new RPi 3 B+ starter packs (with original power supply!). When I insert an existing SD card it shows a low voltage warning in the top ...
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2answers
6k views

Installing PyQt5 on raspberry: unable to imoprt PyQt5.sip

Trying to install PyQt5 on Raspberry Pi 3B, I followed instructions to first download, extract and install SIP and then download, extract and install PyQt5. Python 2.7 and 3.7 are both installed on ...
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2answers
170 views

Run script on boot.

I want to know my Public IP address of PI using script and script should be start running automatically when my raspberry pi boot and Store output in some file, so that i can use later on. Actually, ...
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3answers
9k views

RetroPie fails to boot on Raspberry Pi 3 Model B+ with rainbow screen and flashing red led

I downloaded the latest version of RetroPie (v4.3) to a formatted SanDisk 16GB SD card. When I try to boot RetroPie on a brand new Raspberry Pi 3 Model B+, it gets stuck on a rainbow screen. I've ...
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2answers
730 views

Raspberry Pi Camera(8 MP) shows blur images in Android Things installed on Raspberry Pi

Raspberry Pi Camera(8 MP) shows blur images in Android Things installed on Raspberry Pi. I use the code from Google Sample -- Doorbell application and capture the image but Image is too blur (Camera ...
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2answers
86 views

SSH - Not able to ssh from my laptop to raspberry after rebooting the pi

Greetings to the community! I am struggling establishing an ssh connection from laptop (Windows 10) to my pi connected to it through an Ethernet cable (raspberry pi 3 model B+). The process I am ...
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1answer
95 views

Is it safe to use 3V3 on raspberry pi 3B+ to control a 3V DC motor?

I want to connect power to a 3V DC motor straight from 3v3 GPIO. Is it safe or will I brick my Pi 3B+ ?
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1answer
61 views

SIM900A with Raspberry Pi 3 Weird Error and Behaviour

I am working on integrating Sim900a on Rpi3B. As usual connecting to TX->Rx, Rx->Tx (GPIO14, GPIO15 in Rpi) - following diagram from this link: How do I connect GSM SIM 900A to a Raspberry Pi 3? When ...
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2answers
124 views

Powering the Raspberry 3 B+ with PSU

I have a PSU from Amazon that provides 5V and I used my trusty multimeter to adjust the voltage to exactly 5.0V. I used it previously to run some silent fans, but I don't have any use for that anymore ...
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1answer
463 views

Low wifi speed even with 5Ghz wifi adapter

My internet download speed from my D-Link wifi router is 24 M bits/s From ethernet the download speed is 50 Mbits/s I am using Tp-link AC600 Archer T2U Plus wifi adapter with Rapberry pi 3B+ I ...
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1answer
53 views

When I make a clone of my SD, the resulting image has ethernet problems

First of all, I'm working with Ubuntu Server 18.04, on a Raspberry Pi 3b+. I'm running a server with Nodejs and MongoDB. Everything works perfect. The problem comes when I want to clone the SD into ...
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1answer
66 views

Why can't I hear the sounds when making a call?

I was able to make calls using my RPI 3 model B+, Huawei E153 GSM Modem, and minicom. I can see that the cellphone I'm calling was able to answer my call (from my Pi). I plugged in my headphones to ...
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2answers
65 views

Relay modules: Can I switch AC in one and DC in another?

I would like to control both 120VAC and 24VDC from my RPi 3B+. To make this easy, I'm looking at one of the various 3ch or 4ch relay modules for an RPi 3B+, like this or this. I'm familiar with using ...
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1answer
400 views

Is it possible to use the pi as a wireless usb passthrough to my windows computer?

I have just recently had a raspberry pi 3 model B+ and thought of a cool project. Being a total beginner at this area, i do not know if it is even possible. My desktop pc is in a very pecular ...
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2answers
193 views

Raspberry Pi4 extension to PCIe

Is it possible to extend the Raspberry Pi 4 to provide a PCIe connection? I have a PC which has as only purpose to play music using this Soundcard (no Linux drivers that work well) "PCI Express X-Fi ...
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2answers
597 views

Imaging Raspberry PI via PXE

Apologies if this has been answered, tried searching but didn't find exactly what I was looking for. I have 5-10 Raspberry PI's coming in at a time that I need to load Rasbian (jessie) on. Currently I ...
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3answers
444 views

can i power 2 raspberry pi 3 B+ using a USB hub?

i like to power 2 Rsp3b+ via a Power USB hub, i have a usb power hub that is 12v @ 2A and im worrying it will blow or burn the ic's of the pi's due to over voltage, would this be true? I like to add ...
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1answer
191 views

RPI Fan Startup and Temp Control

Info: I am running a rpi 3b+, with Recommended Raspbian installed, and also with a Noctura NF-A4x10 5V, mounted on the lid, with vent holes, of the official rpi case. I will eventually turn this ...
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1answer
94 views

Handle data while filming with rPI [closed]

We will buy the BMPCC4k (This means 500GB/hour on a ssd), as we are a low/no-budget production, we can't have someone handling data. I had the idea to use a rPI3+ to use for this. But I'm not sure if ...
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2answers
127 views

how to install several different Operating Systems on pi 3 b+ sd card and how to access them

I wish to install several different Op Systems on one micro sd card for a pi 3b+. I use octopi for running a 3d printer and interested in dietpi and more to experiment with. Will be looking into an ...
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3answers
299 views

Rpi3 log file opened and closed with python but corrupted on power loss - albeit file was closed

I have to ensure that every minute I open, write, and close a log file. It must be closed as we trigger power loss randomly on the Rpi3. I known it is bad and I also know that you want to use ...
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1answer
10k views

How to control screensaver in Raspbian Stretch?

Brand-new Rpi3B+ with a brand-new download of Stretch. Made sure everything is up to date: sudo apt-get update && sudo apt-get upgrade -y sudo apt-get autoremove -y sudo apt-get dist-upgrade ...
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2answers
42 views

Run application with other user than root

Within a small project I opened a wireless connection using the NRF24L01 transceiver and a Raspberry Pi 3 Model B+ with Raspbian 10. To communicate over the transceiver I make use of the RF24 library ...
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1answer
40 views

Raspberry Pi 3 B+ not booting up and SD card socket overheating

My pi has been working fine up until a few hours ago. These are some of the the problems I’m facing: On the pi, the red power light is on but the yellow light isn’t. There is no display on my ...
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1answer
32 views

Modbus rtu on pi

Would anyone have any recommendations for a modbus newbie on getting a pi to talk to a communicating sensor? 2 options Option 1, $10: https://www.amazon.com/Serial-Converter-Adapter-interface-...
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1answer
32 views

raspistill does not stop taking pictures

I wanted to take a single picture with raspistill, but it writes a file every ~11 seconds and does not stop. The command is: raspistill -t 0 -q 90 -dt -w 1920 -h 1080 -n -fli 50hz -o /media/pi/...
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1answer
27 views

rapsbery pi 3b+ now only giving ipv6 address

I have 3 rpis on my network and only one of them has decided it needs to use ipv6. I have been able to set it to ipv4 using the sudo dhclient -4 -v wlan0 command I tried setting the disable ipv6 on ...
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1answer
50 views

How to use a Pi 3B+ as a “travel router” with both USB + wireless tether for multiple iOS or Android devices?

I have a Raspberry Pi 3B+ unit that I'd like to use as a "travel router" to attach multiple networks to the Internet via any one of a few different tetherable phones a la the following diagram via ...
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1answer
285 views

Wireguard VPN Raspberry Pi CLIENT

Does any one have any experience in connecting to a Wireguard VPN from a Raspberry pi? The VPN is set up correctly and I can connect to it using my phone and laptop but I can't get any info on ...
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1answer
138 views

OpenCV camera resolution

I am working on a project with OpenCV. It is running on a Raspberry Pi 3 B+. When i start the camera, and do some visual processing the framerate becomes really low and there is a lot of lag. My ...
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1answer
37 views

How to connect an Raspberry pi to an android phone via bluetooth?

I am working on a project in which I'm supposed to take some readings from sensors, then do some analysis on them and output a result. I want to display this result on my android phone. How would I go ...
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1answer
41 views

Consistent filesystem corrruption

It seems that recently my SSD began to get corrupted almost every time I shut my Pi 3B+ down, and on boot I get: [ 4.503731] sda: sda1 sda2 [ 4.511049] sd 0:0:0:0: [sda] Attached SCSI disk [ ...
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1answer
99 views

How to turn off USB chip permanently?

I am seeking ways to reduce power consumption on my raspberry pi 3B+. I've read that one of the most efficient ways is to turn off the USB chip. This link shows how to do so via the toggle commands. ...
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1answer
849 views

What problem does dphys-swapfile solve?

I have a RaspberryPi 3B rev 1.2. It has 1 GB of RAM. When I run my C++ compiler at -j 2 or above I catch intermittent Out Of Memory (OOM) kills. Sometimes the compiler is killed, other times other ...
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1answer
184 views

Raspberry pi 3B+ vs Raspberry pi 4

what are pro and cons of Raspberry pi 3B+ vs Raspberry pi 4 ? For a new beginner like me which one to start with either Raspberry pi 3B+ or Raspberry pi 4 ? Thanks in Advance!!!
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1answer
232 views

howto config network interfaces in Raspbian after config files change

I cannot find a way to start network interfaces with proper config after I changed config files (eg dhcpcd.conf). The only way I found to take the new config into account is to reboot. There must be ...
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1answer
108 views

Need help for iptables/filter

Setup: RPi connected to router using ethernet on subnet 192.168.0.0/24 which is also an access point access on subnet 192.168.43.0/24 So basically devices will connect to my Rpi for VPN traffic I ...
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4answers
3k views

Unstable Ethernet connection on RPi 4

I run a headless Raspberry Pi 4 (4 GB) which is powered by the official USB-C power supply. I operate the Pi 4 (Raspbian Buster Lite) via the ssh protocol (putty) from a Windows machine. I realized ...
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1answer
1k views

Controlling 5 LIDARs using Raspberry Pi

I came across this instructable which illustrates how to connect the TFMini LiDAR to the Raspberry Pi. In the list of materials, he said that I will be needing a Resistor (between 100-1k Ohm) (...
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1answer
37 views

Run a code without being on the physical machine

I have some devices (i.e. leds) that I need to control on a Raspberry Pi, but I was thinking if there is a way in which I can put the code in a server, and then when the raspberry Pi receives a ...
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1answer
269 views

Raspberry Pi Ethernet network bridge with separate wireless connectivity

As explained here, I built an Ethernet bridge using a Raspberry Pi 3b+. As an extension, I am now trying to connect it to the internet via the WiFi interface. For that I configured the wireless ...
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2answers
217 views

Test raspberry power supply

I have a raspberry pi 3 B+ and an external hdd like this one Connecting it directly to the pi makes the pi shutdown and restart I’ve tried to use an external usb hub with power but it still keeps ...
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1answer
25 views

How can I control a RaspiCam with the display CSI?

I was working with a RaspiCam on my 3B+ when something in the hardware broke. The Pi does not recognize my cam anymore. But when I connected it to the display CSI the LED on the cam started glowing. ...
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2answers
412 views

Create Wifi network without Internet Connection and perform WIFI Switch

I would like to create a wifi network which does not have access to the Internet - that should not be a problem as there are plenty of posts already on Stack Exchange covering this topic. However, ...
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2answers
970 views

Raspberry Pi “Temporary failure in name resolution”

After many hours of googling and testing for a solution, I am stuck. I would really appreciate some advice. Situation - I have (5) Raspberry Pis 3B+ (RP) at various customer locations and I want to ...
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1answer
560 views

init.d script does not run start on boot but starts manually (Raspbian)

Whenever the system starts, the zfs-import init script does not run: root@kapnet:# /etc/init.d/zfs-import status ● zfs-import.service - LSB: Import ZFS pools Loaded: loaded (/etc/init.d/zfs-import;...
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1answer
158 views

Connecting 50 Microphones on a raspberry pi

I want to create a microphone array like in the image below... How can I do it for a raspberry device ? I want the input to be stored for a few seconds on the sd card, and not to have a live stream, ...
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1answer
714 views

Pi HAT Waveform Generator for Raspberry Pi 3B+

I am looking for a Pi HAT capable of generating 300 kHz sine waves at about 8 samples per waveform with my Raspberry Pi 3B+. Sampling rate required is around 2.5 MSps. Output voltage ideally needs to ...
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2answers
325 views

Execute single graphical programs remotely using X Window

I have a Raspberry Pi with Raspbian Stretch Lite. I want do execute only some single graphical programs remotely and do not want to install a complete graphical user interface with a Desktop program ...
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1answer
108 views

Serial comms & USB camera in parallel/threaded?

My project is currently using OpenCV to controll a pair of motors via hardware PWM (am using the pigpio library for GPIO control). The video input is from a USB webcam. I would like to add some ...

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