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Questions tagged [pi-4]

For questions that apply specifically to the Raspberry Pi 4 and not other/all models.

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8 views

Pi 4 Raspbian 64bit, Wifi Only failing when using 4k 60hz (hdmi-01)

Hello enabling TV the full HDMI option to allow 4K 60 hz, the Raspberry Pi 4 stops connecting to Wifi and after boot the connection is bugging. Further my wireless keyboard and mouse are connecting ...
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1answer
16 views

Shut off all USB ports

Is there a command that shuts off power to both USB 2.0 ports on the Pi 4? Bonus points if the command does not disable the USB 3.0 or Ethernet.
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9 views

Turning on/off specific HDMI port on Pi 4

According to the docs, vcgencmd now can specify which hdmi port as a second argument for raspberry pi 4, so I did sudo apt update then sudo apt upgrade but vcgencmd display_power 0 7 returns error=2 ...
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17 views

Rpi4B buster SPI CAN Bus Interface Problem

I'm using PI4 OS Buster. I want to connect 2 canbus interfaces so I will be able to read both of them at the same time. this is the connections I have made GPIO CAN HEADR ...
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1answer
22 views

Raspberry Pi 4 - Adafruit MAX98357 - No Sound from speaker

We are following this: https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/overview tutorial to setup our Raspberry Pi 4 with an Adafruit MAX98357 I2S Class-D Mono Amp to a speaker (4 ...
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3answers
146 views

Temperature question

i'm planning to buy an Raspberry Pi 4 Model B. Short time after release of the Pi 4 many people have complained about heat problems (not only at 100% CPU usage, but in idle). My question is now, did ...
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0answers
13 views

How can I use my RP 4 with Raspbian as a media server for local and remote access?

How can I use my RP 4 with Raspbian as a media server for local and remote access? I would like to be able to download some movies and watch them from any device in my LAN or remotely? Thanks
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10 views

Kubernetes 64 bit cluster on Raspberry Pi 4

I am trying to get Kubernetes installed (via kubeadm) on my Pi 4 cluster. I do have it running, but it is all in 32 bit mode, which is challenging since so many K8s components are 64 bit only (for ...
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1answer
32 views

SSH: connection refused

I bought Raspberry PI 4 and I need to connect to it via SSH because I do not have micro HDMI yet. I'm trying to establish the SSH connection, but PuTTY returns "Connection refused" error, but the IP ...
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0answers
14 views

Get data from sensor via Bluetooth

i´m trying something i haven´t seen anyone did before. I`m trying to get the data of some sensors via Bluetooth in order to generate a CSV file with this information given by some iHealth sensors. Can ...
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1answer
24 views

4 Displays with diffrent output using Raspberry Pis

Core Problem: I need 4 displays to show diffrent output (simple images) For this kind of "Video Wall" problem, most solutions recommend one RPi for each display/monitor in a master/slave ...
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0answers
10 views

(Pi4) No Display when in OTG mode unless HDMI_safe=1

Im officially stumped. I have connected my Pi4 to my PC via USB to USB-C for OTG connection. Whenever I boot with the normal PSU to the USB-C port on the Pi4, everything boots correctly (display and ...
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16 views

How to install LCD driver on pi4 with Ubuntu19.10?

I try the LCD driver in github: git clone https://github.com/goodtft/LCD-show.git cd LCD-show/ sudo bash ./LCD35-show output: dpkg: 依赖问题阻止了卸载 xserver-xorg-input-evdev 的操作: xserver-xorg-input-evdev-...
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1answer
29 views

Short and frequent freeze on Raspberry Pi 4 with Kali Linux 64bit

I installed Kali Linux RaspberryPi 2 (v1.2), 3 and 4 64-Bit on my Raspberry Pi 4 with 4Gb RAM. All is running very well but I frequently experience a freeze, about 10 seconds of total interruption of ...
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0answers
26 views

RPi 4 second HDMI port does not seem to support CEC

When using the cec-utils on a Pi-4 with 2 HDMI devices connected, the one connected to HDMI1 does not respond to commands or show up in a scan. Running cec-client -l only shows 1 device. Is there ...
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1answer
34 views

RPi4 - Using windows to create micro SD card copies - fail to boot?

I'm currently trying to use 'Minitool Partimage Image' on Windows 10 - this works with all standard hard drive duplication. After a lot of testing of various size microSD cards, why when you perform a ...
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0answers
16 views

SIM800L - GAMMU not connecting - RPI 4

I connected my RPI4 & RPI3B one by one with my SIM800L board in hope to be able to receive sms on the board. Unfortunately, the boards do not detect the module. The SIM800l was given external ...
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0answers
34 views

Pi 4 Will Not Boot with Noobs or Raspbian

I recently bought a Raspberry Pi 4, 4GB model, and I cannot get it to boot Noobs or Raspbian. When I purchased it, I knew I wanted to use it for a ubuntu distro, and it booted noobs, but I couldn't ...
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1answer
36 views

Using EnOcean PI 868 with raspberry PI4

first of all: I'm new to raspberry I.ve just bought a raspberry PI 4 together with an EnOcean PI 868 module to set up a house automation system. To make it run I've tried the steps described on the ...
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0answers
27 views

Unable to run JavaFX application on Raspberry Pi 4B

I have developed one JavaFX touchscreen application with screen size 800x480 which runs fine on RPi 3 with the Raspberry Pi 7" Touchscreen Display in the default resolution (800x480). Now I am trying ...
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0answers
11 views

raspistill won't work when automating shots on 1GB PI 4

THIS WORKS: raspistill -cs 0 -ISO 600 -ss 175000 -w 1920 -h 1080 -o watcher-0000.jpg This does not raspistill -cs 0 -t 46800000 -ISO 600 -ss 175000 -w 1920 -h 1080 -o watcher-%04d.jpg I have ...
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0answers
21 views

Raspberry PI4 slow ethernet

I have some issue with my LAN network with Rasberry PI 4. My network in PI has configuration: eth0: negotiated 100baseTx-FD flow-control, link ok when I run iper3 on PI: iperf3 -s a then on PC as ...
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0answers
18 views

Bluetooth hci0 device suddenly missing on 4B+

After a recent reboot of my 4B+ I noticed that my bluetooth connections had stopped working. I noticed that bluetoothctl reported no device, and further that sudo hciconfig hci0 up indicates Can't get ...
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2answers
67 views

How to make/develop android apps and use them with RPi4?

I am using Raspberry Pi 4 for a while with the latest buster release. I searched for a lot of questions and find that android development is not possible with raspberry pi. But I wonder, that both are ...
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2answers
36 views

Help Patching a driver

I've been tasked with updating a driver on a Raspberry Pi 4 running Raspbian. I'm told I need to apply this patch https://lkml.org/lkml/2019/4/1/1050 in order to get my USB modem to work. When I run ...
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0answers
38 views

Raspberry Pi4 Error while using 2 USB cameras, VIDIOC_QBUF: Invalid argument

I'm using Python OpenCV to read from 2 USB webcams on a Raspberry Pi4. If I'm using either of the camera individually they work fine. As soon as I initialize both cameras in the script as following: ...
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2answers
57 views

Why won't my TV see the Raspberry Pi 4 as a source

I recently got a Raspberry Pi 4B and i used a 128GB MicroSD card and copied over the files from Noobs 3.2.1. I connected the MicroHDMI > HDMI to my TV and connected the power adapter and turned it on. ...
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1answer
33 views

Networking interfaces disappeared from my RPI 4B 4GB

Since receiving this Pi I've installed and configured Octoprint for my printer. It ran fine without issues for 3-4 days, until I got disconnected when checking from work. Once home I found the Pi in ...
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0answers
49 views

imutils VideoStream(src=0) return VIDIOC_QBUF: Invalid argument in raspberry pi

I am only doing a simple code in my Raspberry Pi 4: from imutils.video import VideoStream # initialize the video streams and allow them to warmup print("[INFO] starting cameras...") webcam = ...
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3answers
59 views

Reboot not starting python app but executing runs with no Errors

I'm running a bell app connected by ENet between two RPI 4. The button end works well, but the server end only works when I sign in to activate it. How do I get it to start at start-up in Crontab? @...
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2answers
62 views

SIM900 A6 GPRS GSM Module and Rpi4B UART Communication Problem

I use a module same as here with my RPI 4B and there were difficulties in communication between them two since the start. The module worked fine with my Arduino. It is connected via Rxd-Txd pins, 5V, ...
0
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1answer
59 views

Raspberry Pi 4 - Connection to dhcpcd lost

I was trying to set up an ad-hoc network on my Raspberry Pi 4 and now the WiFi is not working. If I try to run ifconfig there is no wlan0 interface that shows up. I have also tried to manually change ...
-1
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0answers
13 views

I need help to autorun 2 set of code in different time

is there anyway I can auto run 2 set of codes one by one each time druing pi boost. basically I want to run the first set of code when the pi boost . then when the pi turn off, if i restart the pi ...
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29 views

Raspberry Pi 4 with Pi2SCART

I've recently bought a Raspberry Pi 4 that I intend to connect to an old TV with SCART connector to do some sweet old retro gaming. For that purpose, I bought a Pi2SCART adaptator. I've followed the ...
0
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1answer
56 views

Raspberry Pi 4 Low Voltage performance

I am looking what exactly happens when a Raspberry Pi 4 is powered with low voltage. I am not looking whether this will hurt the Raspberry (as this has been asked before) or how to fix this. I ...
0
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0answers
27 views

How do I control a GPIO pin with a HTML button?

I am trying to send a temporary signal through one of the GPIO pins on my Pi 4, like to light up an LED for 1 second then turn off. Is there are way to do this by clicking on a button on my HTML web ...
1
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1answer
98 views

How can Rpi4B use UART to read and analyze received data at a 3DR FPV Air Radio Module?

I am trying to set up the FPV telemetry radios (Air and Ground Module 433MHz). I have connected the Ground module to my laptop (USB) and air module to Raspberry Pi 4 UART pins. Using Mission planner ...
1
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2answers
50 views
+50

how to setup and mirror two visual screen (a) touch 3.5 touch screen in general 40 pin connector and (b) hdmi 1 over TV?

I have new 4GB Rasberry Pi 4. I would like to mirror a touch screen,3.5 inch TFT LCD over 40 point connector and HDMI 1 over TV. I could not connect both and mirror together. Sorry I new to Rasberry ...
1
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1answer
29 views

Installed Rasbian, but reboots to install screen?

What am I missing? Noob boots, I select the recommended rasbian install. It goes through a several minute process, but then brings me back to the setup/install screen? Only things I can select in menu ...
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2answers
33 views

Opening problem of raspbian

I have a problem of opening of raspbian. I installed the raspbian and then after installing a dialogue box showed that installation is successful, after i press ok the monitor shows no signal and then ...
1
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1answer
66 views

eduroam wifi login RP3b vs RPI4

I was wondering if there is any difference with the RPI3b and the RPI4 to login to eduroam network (WPA-EAP)? I have 3 rpi3b and i connect to eduroam without any issue. On th RPi 3B I have Raspbian ...
1
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0answers
44 views

RPi 4 - 8 nodes - Appropriate switch for POE

I was thinking about an 8 port switch that can provide my 8 RPi's 4 power over POE. I think i have found one according to my needs ( small dimensions), namely the: Ubiquiti EdgeSwitch 10XP - https://...
1
vote
1answer
83 views

RPi 4 consumes 2.5W when shut down

My RPi 4 consumes about 0.5A after executing sudo halt, while according to this post it should draw at least an order of magnitude less (0.069A). The green LED blinks several times then goes off, but ...
3
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1answer
88 views

Pi 4: Can it play blu ray rips

So basically I couldn't find an answer to this directly. But can a Pi 4 blu ray play blu ray rips(from my own blu rays) without issues? With the pi 3 and older, it was too much. Is the pi 4 powerful ...
0
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0answers
17 views

How to disable shared connection for Network Manager access point?

I am using a Raspberry Pi4 with balenaOS in order to serve a simple WebApp. I am currently using Network Manager in order to create a network for the users to access the app. As users should not be ...
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1answer
23 views

Can't connect to raspberry pi via PuTTy after configuring static ip

I'm able to connect to the local server before static IP is set but after I set a static IP on eth0, I'm no longer able to connect to the server. I tried to configure my static IP in /etc/network/...
0
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0answers
30 views

LIRC with RaspberryPi problem, lirc.conf

I've configured lirc like https://www.raspberrypi.org/forums/viewtopic.php?t=235256 on my Raspberry Pi 4B. All seemed to go well, irrecord worked and I get my lirc.conf file like this. begin remote ...
-1
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1answer
75 views

Raspberry Pi 4 touchscreen misbehaving when using a secondary monitor

First of all I recorded a video on the phenomenon, this might be more descriptive than my words: video of the problem I have a project in which I have to use two displays: one that is the 7 inch ...
1
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1answer
142 views

TensorFlow 2.0 Rpi4B buster Installation Problem

I have been trying to install Tensorflow 2.0 on Raspberry Pi 4 (Buster). The documentation here make it seem easy. And indeed it seems to work. However, it installs 1.13.1 (not 2.0). I have ...
0
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1answer
81 views

E: Package 'python-wxgtk2.8' has no installation candidate

I'm having trouble installing ''sudo apt-get install python-wxgtk2.8 python-wxtools wx2.8-i18n libwxgtk2.8-dev ''at Pi4. It failed with:''Reading package lists... Done Building dependency tree Reading ...