Questions tagged [pi-3b+]

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

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48
votes
4answers
231k views

How do I make serial work on the Raspberry Pi3 (or later model)

My Pi3 serial console produces rubbish and fails to respond to the keyboard.
15
votes
1answer
24k 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-...
12
votes
3answers
2k 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 ...
11
votes
4answers
19k 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 ...
10
votes
4answers
14k 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,...
7
votes
5answers
1k 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 ...
7
votes
2answers
14k 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 ...
7
votes
1answer
3k 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 ...
6
votes
5answers
2k 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 ...
6
votes
4answers
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 ) ...
6
votes
4answers
1k 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. ...
6
votes
4answers
3k 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?
5
votes
3answers
3k 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 ...
5
votes
1answer
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 ...
5
votes
1answer
3k 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.
5
votes
1answer
604 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 ...
4
votes
3answers
3k 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 ...
4
votes
1answer
4k 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 ...
4
votes
1answer
771 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: ...
4
votes
1answer
1k 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 ...
4
votes
4answers
6k 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 ...
4
votes
1answer
363 views

Can't SSH into RPI over WiFI

The way I setup the RPI is through sharing my laptop's connection via ethernet. I enabled SSH. Now I am trying to SSH from it without being hardwired to it the way I set it up and the connection keeps ...
4
votes
2answers
6k 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 ...
4
votes
1answer
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 ...
4
votes
2answers
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 ...
4
votes
1answer
1k views

DS18B20 Temperature Sensor - Rpi 3/4 Driver, Wiring, Detection, and Python Programming

I am new in raspberry pi. In my research project, I would like to monitor ground temperature at 60 points. My team decided to set a monitoring system using raspberry pi. As a preliminary test, I ...
3
votes
9answers
31k 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 '...
3
votes
2answers
174 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 ...
3
votes
2answers
4k views

How to automatically rerun python script if error occurs

I have python script which ideally runs indefinitely in loop. I am catching some exceptions, however, the problem is when some error occurs and script stops because of error. I want to detect somehow ...
3
votes
1answer
4k 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 ...
3
votes
2answers
364 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 ...
3
votes
2answers
789 views

Firefox Arm64 available but RasPi 3B+ still 32-bit

I want to be able to use my Raspberry Pi 3B+ as a desktop system. In order to do that, I need to be able to make use of apps such as Firefox-ARM64. Given all of the confusion regarding migrating ...
3
votes
2answers
757 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?
3
votes
1answer
66 views

Can RPi 4 deliver more amps on the 5 volt rail than RPi 3 powered over PoE?

I have a setup using a Raspberry Pi 3B. I use the PoE hat on top and I power the entire setup over PoE from a Unifi switch. The setup has quite a lot of peripherals that need power and I use the 5 ...
3
votes
1answer
852 views

POE without the Rpi Hat?

I have a raspberry pi 3b+ with the 4 PoE connectors. How can I power the Pi with Ethernet without buying the PoE Hat? Is there a link to a schematic for the PoE hat? I need a different board on top of ...
3
votes
4answers
2k 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/...
3
votes
3answers
690 views

GPIO vs I2C SMBUS2

This example scans for any I2C slave address current on the I2C bus. (I am using a RPi 3B+ with raspbian buster from september release) Script trial_smbus.py: from smbus2 import SMBus channel = 1 ...
3
votes
2answers
83 views

Should I tear apart USB PSU or get a dedicated switching PSU?

I'm going to be using an Pi-3B+ to switch an AC and a DC device using one of the popular relay modules. This whole project is going to go in a custom screw-together project box that will have AC input ...
3
votes
1answer
341 views

Running a persistent node js server on boot and keeping the command line open

I know there are a lot of answers to this question but none have worked for me and I've been at it for something like six hours... Most of the answers also look like they are years out of date. I am ...
3
votes
3answers
5k views

can't install opencv on my pi

I'm an absolute Raspberry Pi newbie. My intention is to get some camera vision project working for which I need OpenCV3.3's dnn Python module. I've found here a description of how OpenCV can be ...
3
votes
1answer
115 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 ...
3
votes
2answers
57 views

Ambient operating temperature

Will the raspberry pi be able to operate with an ambient temperature of between 50c to 80c? The model we are using is the raspberry pi 3 b+.
3
votes
1answer
168 views

Won't mount btrfs file system unless you try to mount each disk separately

I have a pi 3b running raspbian 10, installed fresh this morning. All was going well until it ceased to be able to mount my btrfs volume. The error I get is as follows: mount: /drive: wrong fs type, ...
3
votes
3answers
1k views

Cannot set static IP address for Wi-Fi

I am trying to make static IP address on RPI 3B+ for both ethernet and Wi-Fi. I was following this answer(How do I set up networking/WiFi/static IP address?), but still could not do it. So far I ...
3
votes
1answer
288 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. ...
3
votes
2answers
1k views

Setting up Bridged VPN using: RPi 3G Hotspot router + openvpn client to connect to home RPi OpenVPN server

I have a Raspberry Pi 3B+ which is working as a hotspot using a Hologram Nova usb ppp0 device where it receives Internet from and routes the internet through WiFi and Ethernet. This Hologram usb ppp0 ...
3
votes
2answers
2k views

C++ problem: boost/asio.hpp non existing

I'm using Raspberry Pi 3B+. I'm trying to compile a rather massive C++ package given to me from somewhere else. However make fails compiling. It cannot find boost/asio.hpp. I simplified the problem ...
3
votes
3answers
1k 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 ...
3
votes
1answer
2k 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 ...
3
votes
1answer
594 views

Swift ARM build that will run on Raspberry Pi 3 B+

I've been fiddling around in my free time trying to get Swift 4.something to run on a Raspberry Pi 3 B+ with Raspbian Stretch. I found a repo on GitHub which looked promising, but after building it ...

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