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Newest 'pi-4' Questions - Raspberry Pi Stack Exchange
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Learn more about TeamsQuestions tagged [pi-4]
For questions that apply specifically to the Raspberry Pi 4 and not other/all models.
2,027 questions
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-1
votes
1
answer
27
views
How do I use the Blutooth on RP4?
I clicked the Blutooth logo on top and tried to connect to my Soundcore speaker but it won't let me. It says to use "audio panel" to connect but no such setting comes up.
0
votes
0
answers
26
views
How to troubleshoot a possibly fried Raspberry Pi 4B?
I have been trying to design a custom power supply for USB PD Rev3 using the STUSB4761 negotiator IC that can potentially support the Pi 5 at 5V 5A. The goal is to integrate this into a compact ...
0
votes
1
answer
43
views
RPi 4b 8GB boots, then two quick act flashes
I have a RPi4 with 8GB RAM, that boots just fine - up to a certain point. Then screen goes black, and act (green) LED blinks rapidly twice, with a pause for ~1 sec before two rapid blinks repeats. ...
0
votes
0
answers
24
views
Pi 4B not working Jack 3.5
I try to have any sound from my Pi 4B throw 3.5 Jack, however i hear nothing(I plug in headphones to this Jack port).
Ive read about dtparam=audio=on at config.txt
Ive tried alsamixer
Ive tried ...
0
votes
0
answers
23
views
HDMI 2 Not Showing with xrandr rpi4b
I am trying to use xrandr to manage my two screens connected to my raspberry pi 4b. I am running bookworm. The problem is that when I try to list my monitors with xrandr -q and xrandr --listmonitors I ...
0
votes
0
answers
49
views
How to create a second Wireless Interface on Pi 4?
I would like to create a second wireless interface on my Raspberry Pi hardware. Ideally I would like it to be in infrastructure mode and on a different channel from wlan0.
Where in the OS is wlan0 ...
0
votes
1
answer
57
views
How to get the Waveshare 2CH RS232 HAT working on the RPi 4B?
I have been testing the 2CH RS232 HAT on the RPi 4B.
Connected 2 minicom terminals to each tty (ttySC0, ttySC1) and tied both together with a NULL modem cable.
If I type in ttySC0 terminal, I observe ...
0
votes
0
answers
40
views
Raspberry PI 4B + Steam Link only getting audio or video, not both
I have a Raspberry PI 4B I want to use as a Steam Link for my old (2009) LG TV. I am running Raspberry PI OS Lite (64 bit) Debian Bookworm, fully updated, with the newest steamlink following https://...
0
votes
0
answers
12
views
Deja-Dup on Raspberry Pi 5b-16gb
I'm unable to get deja-dup to authenticate to my Google Drive:
After launching from a non-root command line, I get this set of errors.
It does NOT AUTHENTICATE to my drive! It is on both my Pi4-8 and ...
3
votes
1
answer
60
views
How to use this microdisplay with a Raspberry Pi?
I have a 0.23 inch microdisplay (https://www.amazon.ca/Microdisplays-Resolution-Brightness-Interface-Application/dp/B0CDXXWSRV) that doesn't seem to connect directly to my Raspberry Pi Pico 2W, Zero 2,...
0
votes
1
answer
24
views
Connecting RPI 4B to Adafruit FeatherWing RFM95W 433MHz
I wanted to connect the Adafruit LORA module to my RPI 4B.
I connected it this way:
RFM9x FeatherWing
Raspberry Pi 4B (GPIO)
3.3V
3.3V
GND
GND
SCK
GPIO11 (SCLK, pin 23)
MOSI
GPIO10 (MOSI, pin 19)
MISO
...
0
votes
1
answer
64
views
my raspberry pi 4 is not working
I just got it a couple of days ago and I have a 32gb SanDisk that I used for the Sofware for it. I watched multiple guides for setting them up, but the raspberry just doesn't work when I try to boot ...
2
votes
0
answers
29
views
Detect whether USB speaker is connected to my RPi 4B, in Python
I'm building a device that if in my Python program the USB speakers are not connected it directs sound only to the headphones but the device works differently in a different mode with not so many ...
2
votes
1
answer
65
views
Docker container not running unless I ssh into RPi
I don't think this problem has to do with Docker at all, but I'll describe the symptom first. I'm running a RPi 4 model B, with 2024-11-19-raspios-bookworm-arm64-full flashed on the SD card a few days ...
0
votes
2
answers
69
views
Detected under voltage and then my Pi4B stopped working
some minutes ago the OS detected undervoltage in my Raspberry Pi 4 B and then the Pi gone down and stopped working... i tried using voltmeter to measure the voltage of the GPIO and it is almost good (...
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