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Questions tagged [pi-3b+]

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

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54 votes
4 answers
291k views

How do I make serial work on the Raspberry Pi3 (PiZeroW, Pi4 or later models)

My Pi3 serial console produces rubbish and fails to respond to the keyboard.
Milliways's user avatar
  • 60.4k
24 votes
4 answers
52k views

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 ...
wudude's user avatar
  • 425
20 votes
1 answer
42k views

How to setup the Raspberry Pi 3 onboard WiFi for Ubuntu Server 18.04 with netplan?

How to setup of Raspberry Pi 3 B+ onboard WiFi for Ubuntu Server 18.04? In particular, with netplan? This is a clean install of the Ubuntu Server 18.04 image for Raspberry Pi 3. File: ubuntu-18.04.2-...
marc-medley's user avatar
14 votes
10 answers
105k views

WiFi won't start

I have a new Pi 3 B+ and am running openplotter version of NOOBS. When I boot, WiFi doesn't show on the top right of the home screen. When I run raspi-config for Network Options and WiFi, I get '...
pander's user avatar
  • 167
14 votes
3 answers
6k views

Is it possible to simultaneously use the dual band(2.4 Ghz and 5 Ghz) of Raspberry pi 3 B+ to create an AP?

Is it possible to simultaneously create a single AP on raspberry pi 3 b+ which uses both 2.4 Ghz and 5 Ghz bands so that users with low end devices can connect to the 2.4 Ghz band and users with ...
Thoht's user avatar
  • 356
12 votes
3 answers
37k views

How fast can GPIO pins toggle?

I'm currently using Python's RPi.GPIO module to toggle some pins, and I want to know how quickly it can do this. I need the pins to be toggled on the schedule of a ~50 mhz FPGA clock, which I'm ...
auden's user avatar
  • 243
11 votes
4 answers
20k views

Why am I getting a rainbow screen and flashing red PWR LED with a new Raspberry Pi 3B+?

I think there might be a problem with my new Pi. I'm using the same power supply (purchased from PiHut for my previous 3B) in the new 3B+ but I get the rainbow screen and the red power light flashes ...
Shawson's user avatar
  • 213
10 votes
4 answers
12k views

Shorted 3.3v + 5v together. Is it possible to repair?

I was reading through some instructions on how to add a power off/on button to the Pi and accidentally misread instructions and shorted the two end pins on a 3+B model, which appear to be 3.3v and 5v. ...
Elijah Lynn's user avatar
10 votes
4 answers
15k views

Performance differences running Raspbian from USB flash drive versus SD card

I want to run Raspbian from a USB flash drive on a Raspberry Pi 3B+. What would be the performance difference in doing so, as compared to running Raspbian from an SD card?
MC Naveen's user avatar
  • 221
10 votes
4 answers
16k views

Raspbian 8 on Raspberry Pi 3 B+

How can I can use my old Raspbian 8 (Jessie) SD card installation on the Pi 3 B+? I changed files in /boot. (start.elf, start_cd.elf, start_db.elf, start_x.elf, bcm2708-rpi-0-w.dtb, bcm2708-rpi-b.dtb,...
medismail's user avatar
  • 103
8 votes
4 answers
9k views

PoE hat fan activation on OS other than Raspbian

I'm aware that the only officially supported OS that the PoE hat works on is Raspbian. I can confirm that both my hats work, and that the fan does switch on and off if I have Raspbian installed on the ...
Larnu's user avatar
  • 185
8 votes
3 answers
10k views

Is it safe to power my external hard drive with a Raspberry Pi 3 B+ USB port?

I have a external hard drive that has written on it "5V ⎓ 1A". Both power and data transfer happen over a single USB. I have been reading about powering this hard drive with the USB ports on my ...
Eric's user avatar
  • 83
8 votes
1 answer
4k views

Netbooting multiple "workers" RPi from a "master" RPi

My question is, I believe, a little bit complex, and I think it would be better to fully describe what I have and what I want to achieve, with what I am able to do. What I have I have a group of ...
Longwelwind's user avatar
8 votes
1 answer
12k views

Installing libraries via pip is taking forever. Raspberry pi 3b+

I tried to install scipy using pip3 install scipy as well as sudo pip3 install scipy and it got stuck at Building wheel for scipy for 45 minutes. Same is the case for cython. What is the fix or it ...
Tanmay Bhatnagar's user avatar
8 votes
2 answers
28k views

Raspbian - wpa_supplicant.conf Country meaning

I'm a bit confused of the country property in wpa_supplicant.conf. In official Raspberry Wifi Documentation it says this: On the Raspberry Pi 3 Model B+, you will also need to set the country ...
Dino's user avatar
  • 373
7 votes
4 answers
24k views

How to program active cooling connected to GPIO

I have Raspberry Pi 3b+ with the case, which has a small 5v fan, which is connected to GPIO. Look to picture below: The Fan runs continuously, but I don't want continuous operation. I want the fan to ...
romankh3's user avatar
  • 155
7 votes
3 answers
8k views

Switch between wifi client and access point without reboot

I want my Raspberry Pi to be used as access point or as client connected to my internet router but not both together. So I want to switch between these two modes with one simple command without ...
Ingo's user avatar
  • 42.2k
6 votes
5 answers
3k views

Is there a way to remove old files without relying on internet time service?

I have a Raspberry Pi that is acting as a sensor which I am sending out to various customers. The sensor is recording approximately 1 GB every 2-3 days, so I would like to have a way to remove old ...
Cameron Greenwalt's user avatar
6 votes
4 answers
3k views

RPI3B+: What are the four components below the HDMI connector called?

I am trying to get the following RPI3B+ to work. Apparently the machine is booting ok, since I can see it using nmap on my local network: # nmap 192.168.0.23 Starting Nmap 7.70 ( https://nmap.org ) ...
malat's user avatar
  • 227
6 votes
5 answers
2k views

RaspberryPi 3 B+: RPi restart whenever I tried to run two webcams simultaneously

I have a very strange problem with my RPi. Whenever I tried to run two webcams simultaneously, RPi restarts itself. A few months back I can run two webcams simultaneously without such a problem (same ...
Naseeb Gill's user avatar
6 votes
1 answer
7k views

Remmina does not connect to Raspberry Pi Bullseye after RealVNC-server update

The Problem: I have a Raspberry Pi I connect using the VNC client Remmina from Ubuntu 22.04. Recently the realvnc-vnc-server was updated in the Raspberry Pi. Since the update the connection from ...
user68186's user avatar
  • 514
6 votes
3 answers
17k views

How to automatically rerun Python script if error occurs

I have a Python script which ideally runs indefinitely in a loop. I am catching some exceptions, however, the problem is when some error occurs and the script stops because of that error. I want to ...
PostarLakogSna's user avatar
6 votes
1 answer
5k views

Run steam link automatically when starting raspbian

I have installed steam link in raspbian stretch, but I would like it to start when the operating system starts, I've been reading and I tried it with init.d but it did not work for me. Thank you.
Garnica1999's user avatar
6 votes
2 answers
11k views

Raspberry Pi 3B+ freezes randomly

General setup My RPi is connected to a mouse, keyboard, and monitor. My swap size is set to 1000 MB and I'm not using wifi. Problem The RPi freezes randomly, meaning the GUI is frozen, no SSH ...
Hemanti's user avatar
  • 73
6 votes
4 answers
14k views

Connecting RPi to 2 different networks

I'm pretty new to Raspberry and I searched the net for a while now trying to find a good and simple answer to this question. Ok, so I have a network that is connected to the internet. I want to start ...
Sagi Rokach's user avatar
5 votes
4 answers
6k views

I can't get WiFi access point (AP) working on my RPi

I want to control my Raspberry Pi 3B+ using VNC via the on-board WiFi. To this end, I am trying to set up a WiFi access point on wlan0. I followed the instructions at https://www.raspberrypi.org/...
mbrennwa's user avatar
  • 189
5 votes
1 answer
10k views

What are the functions of the test pads on the Pi 3B/3B+?

The various models of the Raspberry Pi comprise numerous test pads (testing pins). Many of these pads however are not mentioned or properly labelled in the official reduced schematics the Raspberry Pi ...
Ghanima's user avatar
  • 15.9k
5 votes
1 answer
2k views

Change PI 3 against PI 3 B+ [duplicate]

Currently I have a PI 3 B running with Raspbian Jessie. It has a 3 TB external Usb-HDD which holds the root partition for the Pi. The SD-Card is only used to start the Grub and afterwards the HDD ...
Flo S67's user avatar
  • 51
5 votes
1 answer
9k views

Disable 5Ghz Wifi-band on Raspberry Pi 3B+

is it possible to disable the ability to use 5Ghz for the wlan0 interface? I only want to use 2.4 Ghz Wifi Networks. So only 2.4Ghz Wifi is available and 5Ghz is disabled. thanks in advance
Bierly's user avatar
  • 73
5 votes
2 answers
11k views

Simulate raspberry pi GPIO

Is there a software to simulate Raspberry Pi hardware design such as proteus? I would like : To use a raspberry pi as a virtual component, Do all the wiring, simulate, Simulate, test code, Check for ...
TheCondorIV's user avatar
5 votes
2 answers
12k views

How to check if SPI is enabled and functional on Raspi 3b+?

I have run raspi-config and enabled SPI and also verified that /boot/config.txt contains the line: dtparam=spi=on However, when I run lsmod | grep spi I get the following: spidev ...
glenneroo's user avatar
  • 155
5 votes
1 answer
4k views

Output fsck on boot to a log file

I'd like to use fsck on every boot of my RPi 3B+ server. To do this I will be using tune2fs -c 1 /dev/mmcblk0p2. When fsck runs I'd like the output to be added to a log file in /home/pi/fsck.log with ...
dominic03's user avatar
  • 357
5 votes
1 answer
3k views

Service failing to wait for internet connection

I'm strying to make my systemd service start after internet connection has been established. I read several questions on this forum, but no success so far. The error is analog to Invalid host: ...
DA--'s user avatar
  • 223
5 votes
1 answer
2k views

Undervoltage symbol

So I have this undervoltage symbol on my raspberry 3+, and it's annoying. Now I have a powerbank with 5V and 2.1A(fast charger) and the symbol is there as well as on the old pi-2b+ AC adapter. So ...
stefanw1337's user avatar
5 votes
1 answer
928 views

Can I boot with any arm64 OS?

I don't know much about the workings of operating systems besides CPU architecture. I have a Raspberry Pi 3 B+, which apparently has an ARM64 architecture (the wiki page for Raspberry Pi says ARMv8-A ...
ZeroZ30o's user avatar
  • 213
5 votes
1 answer
2k views

Is it possible to configure a Raspberry Pi 3 to become a Bluetooth adapter for a desktop PC?

Stupid question, but I've been looking everywhere. I want to configure my Raspberry Pi 3 so that it can basically serve as a bluetooth adapter for my desktop pc. Is this possible, or does it only work ...
ScipioGothicus's user avatar
4 votes
2 answers
3k views

How can I capture the 720p fps60 video?

I tried to use below command to capture the video, but output video fps only 25: raspivid -rot 180 -t 10000 -w 1280 -h 720 -fps 60 -b 1200000 -p 0,0,1280,720 -o test.h264 Any one can help me?
Tony's user avatar
  • 39
4 votes
6 answers
31k 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 ...
L.Gibbs's user avatar
  • 51
4 votes
1 answer
693 views

Scanner only works if used as root

I am having difficulties getting my scanner to operate. I am using Raspbian Buster on a raspberry pi 3b+. My scanner is a USB Canon LIDE 110, which is connected to the pi through a powered USB hub. ...
Shaker's user avatar
  • 41
4 votes
1 answer
3k views

Boot from USB Connected SSD

It seems that existing guides of how to boot from USB are out of date, and the one here (https://learn.adafruit.com/external-drive-as-raspberry-pi-root/hooking-up-the-drive-and-copying-slash) didn't ...
user96931's user avatar
  • 739
4 votes
1 answer
480 views

How to power a Raspberry Pi and servo motors with one power supply

I'm building a robot using Raspberry Pi and several servo motors. I'd like to power all components using a single lithium ion battery. I've looked into using a motor driver hat, but it seems the motor ...
David Brown's user avatar
4 votes
1 answer
14k views

USB Boot From SSD not booting -- Rapsberry Pi 3b+

So I'm having issues getting the USB boot mode working on my new raspberry pi 3b+ and a couple of different SSD's I'll first go through all the things that I've done, and what I'm seeing. Installed ...
Zane. R's user avatar
  • 43
4 votes
1 answer
3k views

How do I install Tensorflow Lite on Raspbian Stretch?

Thanks for your help. I want to deploy a tensorflow neural network to a Raspberry Pi 3 B+ with the Raspbian Stretch OS, and I'd like to know the best way to install Tensorflow Lite (or Tensorflow ...
aveevu's user avatar
  • 163
4 votes
2 answers
4k views

Pi 3 Model B+ doesn't boot - Power Supply or broken?

I just bought a Raspberry Pi 3 Model B+. I also bought a power supply that the reseller sold specifically for the Pi - it delivers up to 3A. However, the Pi doesn't boot. I gives me the rainbow screen ...
DisplayName's user avatar
4 votes
0 answers
979 views

BLE Connect fails with page timeout

I've got a custom BLE 4.1 device and I'm trying to connect it to Raspberry PI 3 B+ using hcitool, gatttool, bluetoothctl, ..., without success. The device is an NRF BLE chip with the Nordic UART ...
PirklW's user avatar
  • 141
3 votes
2 answers
11k views

How to install the latest version of neovim?

The latest stable version of Neovim is 0.4.4. What's the easiest way to install that version of Neovim? Snap, ppa? I've tried building from source but I don't know why make CMAKE_BUILD_TYPE=...
user avatar
3 votes
2 answers
226 views

Scaling of digital reading of pressure sensor

I have purchased one of these and I've connected it to a pressure sensor. I now need to convert the digital values to pressure. However, my maths is all forgotten. Can anyone help me out? The ...
resolver101's user avatar
3 votes
6 answers
5k views

Turn off external LEDs on Raspberry Pi 3

I see there are quite a few posts about this already but none seem to work for me. I am running a pihole server on my RPi 3 and I would like to turn off the external power and LAN LEDs (green and ...
GiarcTNA's user avatar
  • 139
3 votes
1 answer
8k views

Unable to detect cam module in raspberry pi 3 b+

I have my cam module connected and have also tried sudo apt-get update && sudo apt-get upgrade but the pi is unable to detect the cam module. On executing this command : vcgencmd get_camera ...
Sab's user avatar
  • 33
3 votes
2 answers
3k views

Raspberry Pi random reboots (Raspi 3B+)

I have a raspberry pi 3B+ model that I bought back in February 2019. For sometime, I "remember" it was working fine (although I can say from experience - memories can be deceiving). Then I ...
Duck Dodgers's user avatar

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