Questions tagged [pi-4]

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

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Different resolutions HDMI-1/HDMI-2 in Screen Layout Editor

I have a Raspberry Pi 4 (2GB) connected to 2 displays of resolution 3840x600 each (58:9 aspect ratio), running the latest version of Buster. To have the display in correct resolution, I have edited ...
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0answers
2k views

Single webcam using /dev/video0 and /dev/video1

With just one webcam attached, I get two devices: /dev/video0 and /dev/video1 They appear to have identical attributes. It's random which one gets bound to which entry, and only 1 of them actually ...
5
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1answer
2k views

What is the purpose of PD_SENSE in the Raspberry Pi 4 power circuit?

Here the schematics of the USB-C power input of the Pi 4 : You can see that there is a resistor connected to the USB_CC lines of the USC-C socket, the other side is labelled PD_SENSE and is going ...
0
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1answer
131 views

Can you use the Raspberry Pi 4 B to control 1 or more Raspberry Pi Zero's?

My project is going to use Pi 4 to connect to 1 or 2 Pi Zeros. I would want the Pi 4 to control the Pi Zeros. Would that work? Also I am going to connect the Pi 4 to the Ethernet. Also would the Pi 4 ...
1
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2answers
269 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 ...
2
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2answers
1k views

pi-4 cryptsetup benchmark output?

On the pi-4 what is the output of "cryptsetup benchmark"? I want to asses its performance compared to the pi-3. Apparently the new "quality standards" require this question to be needlessly verbose ...
2
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3answers
10k views

Why doesn't the RPi 4 power on when RUN pin is grounded?

I'm trying to power on a RPi 4 using the RUN pin. The RPi is runing LibreELEC (Leia) 9.2 ALPHA1. I tried shutting down the RPi from LibreELEC's GUI, then grounding the RUN pin for a second by ...
0
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1answer
336 views

Performance of OS install on SD vs USB 3

I was wondering if I should think about installing the OS on a USB 3.0 stick and using the USB 3.0 port rather than the Class 10 Micro SD card to enhance read/write speeds. Is there a performance ...
3
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2answers
2k 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 ...
6
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3answers
24k views

Can I plug my SD card from Pi 3 into a Pi 4?

If I upgrade the OS to buster on an OS disk (SD card or USB stick) on my pi 3, will it work if I boot a pi 4 off that?
0
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0answers
53 views

What came out of the team up with Google AI for the rpi 4?

I remember back in 2017 I had read several blog articles such as this one where it was mentioned that the rpi foundation had teamed up with Google and that we could expect Google AI for the raspberry ...
4
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2answers
8k views

Can't set output to 4k 60hz on Pi 4

What I've tried: Setting "4Kp60 HDMI" I did this in the GUI config application and rebooted. Also tried disabling it and then enabling it in the config.txt and rebooted. Installing updates My ...
6
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2answers
1k views

What Revision(s) does cat /proc/cpuinfo return on the new Pi 4 1/2/4GB?

To enhance my bash script decoding the Revision returned by cat /proc/cpuinfo I'd like to know what the RaspBerry Pi 4 codes for ModelName,Processor and Memory are. (my own one is still underway) ...
6
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2answers
4k views

What sort of throughput is achievabe over the USB 3.0 port on the Pi-4?

Looking to run a router application on the rPi-4, and was wondering if anyone has experience using usb 3.0 -> gigabit ethernet adapters on it - specifically what adapter/chipset worked with what ...
5
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2answers
2k views

How fast can GPIO pins toggle on the Pi 4?

Benchmarking of the Pi 4 using the Python GPIO Zero library shows a significant increase in the frequency of toggling a GPIO pin on and off compared to previous models. This result is attributed to ...
0
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0answers
133 views

New Pi Model 4 hangs at most boots

Greatings all Pi eaters! Got the latest Pi "Raspbian Buster full" on a 16 gig SD card but it hangs apx 50% of the time at boot right after log messages disappear. One monitor has a valid HDMI signal ...
28
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6answers
68k views

Choosing a Pi4 power supply

I'm trying to decide what is the best option for powering a Pi4. The specs mention for a minimum of 3A. Let's consider we would also like to connect a 2.5" drive to the Pi4. Could someone more ...
1
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0answers
471 views

HDMI power circuit on the Raspberry Pi 4

The previous models of the Raspberry Pi used different circuits to connect its 5 V power rail to the HDMI connector, i.e. How much current can I draw from each model's HDMI socket? Especially the ...
9
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1answer
31k views

Powering the Pi 4 - safe voltage levels and current requirements

How to safely power the Pi 4, more specifically: What voltage levels are safe to power the Pi 4 via the USB-C connector or via the GPIO header? What are the current requirements? What Power ...
10
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1answer
4k views

Pi 4 I/O interface options... and where to find them

The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are: up to 6 × I2C, up to 6 × UART (muxed with I2C), up to 6 × SPI (only five exposed on Raspberry Pi ...
2
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1answer
2k views

What is the configuration of the 4-pole A/V jack on the Pi 4?

What is the configuration of the combined analogue audio and composite video 3.5mm jack on a Raspberry Pi 4?
5
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2answers
593 views

Can the Raspberry Pi 4 better distribute Python scripts to all four cores?

This relates to previous questions regarding the GIL (Global Interpreter Lock) for Python on the Raspberry Pi. My question has to do with the new processor on the Pi 4 - does it still have the same ...
6
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2answers
7k views

Can Raspbery Pi 4 hardware decode 4k@60hz H.265 10bit video?

I have seen it has H.265 support, but not specifically for 10 bit. Can anyone confirm this?
4
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1answer
9k views

Is Raspberry Pi 4 fast enough to watch online videos with 1080p?

The Pi 4 has a faster processor (1.5 GHz Quad-Core ARM-Cortex A72). I am wondering if it is now possible to watch HTML5 videos on a browser (for example YouTube) and with 1080p quality without lagging ...
29
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1answer
12k views

Does the Pi 4 resolve the Ethernet+USB bottleneck issue of past versions?

The Pi 3 (and previous models) had an issue of bottlenecked bandwidth when using Ethernet and USB simultaneously. Is this resolved in the Pi 4?
8
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1answer
7k views

HEVC playback on RPi 4

Raspberry Pi 4 lists HEVC (H.265) video decoding up to 4K@60fps in the spec. I'd like to get some feedback from people who already had a chance to try it out. Is this hardware or software encoding? ...
2
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3answers
5k views

Raspberry Pi 4 with Anker PowerPort Speed 5

So I'm thinking of getting a Raspberry Pi 4 and I know they have raised the power requirements to 5v 3amps, rather than buying the offical power supply would using the two blue fast charge ports on my ...

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