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Questions tagged [raspberry-pi4]

PROGRAMMING QUESTIONS ONLY. Questions about general use should be asked on https://raspberrypi.stackexchange.com/

The Raspberry Pi 4B comes in three different models, the only difference being the amount of SDRAM (1GB, 2GB or 4GB).
The most notable spec improvements, compared to older models are:

  • 1.5GHz 64-bit quad-core Cortex-A72 ARM v8 CPU
  • 1GB, 2GB or 4GB LPDDR4-3200 SDRAM (depending on model)
  • Gigabit Ethernet
  • 2.4 / 5GHz 802.11ac Wireless LAN
  • Bluetooth 5.0 BLE
  • 2x USB 2.0, 2x USB 3.0
  • 2x micro HDMI ports (both support up to 4kp60)

Visit Raspberrypi-Stackexchange for general questions about the Raspberry Pi.
Also useful might be the original raspberry-pi tag info.

1309 questions
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Python requests.get() only responds if adding a time out

I just did a fresh Raspberry OS install and now I don't get a requests.get() response in Python for most pages, it just becomes stuck and does not respond (interestingly, the address from the example on…
DeepKling
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2 answers

How to send Live Data from Computer(PC) to Raspberry pi 4 using python?

I am receiving live data on PC(7-10 instances per second), I am processing the data and want to send this data to a Raspberry pi 4, and based on the data received on RB_Pi I trigger signals. Can anyone suggest to me, which communication can be used…
Ashwath
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APCUPSD APC Back-UPS 650mi Serial to USB on RaspberryPI 4

Despite hours of searches and several attempts, I cannot configure apcupsd to manage my UPS. This is my UPS: https://www.se.com/ww/en/product/BK650MI/apc-backups-650va-230v/ My configuration: Raspberry Pi 4, 5.10.63-v7l+ Serial to USB Cable,…
THELUKE
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Raspberry Pi Camera Module undetectable by common applications

I bought a 5 mp camera module available at Amazon for my raspberry pi 4 2 gb model. Then I configured it for use and tested it with raspistill and raspivid, it is working as expected. But since it is a module connected to the CSI port and not a USB…
Popcorn Movies
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How to acces the data from a website 50-100 times a second using raspberry Pi?

I want to fetch the data of a stock. Since the data changes very fast, is there any way to pull the data like 50-100 times a second from trading websites? And can we implement that using a raspberry Pi 4 8gig model.
Susheel kumar Pippera
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1 answer

Cannot read data from UART Serial RX-TX pins on raspberry pi 4

I'm new to raspberry pi, and I have a raspberry pi 4. I'm trying to read gps data from RX-TX pins, but it prints nothing. I'm using: sudo cat /dev/ttyAMA0 This command should print the data coming from the GPS module, but it prints nothing. I've…
CingirakliDumbelek
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How to get out Busy Box on Raspberry Pi?

I'm stuck in the Busy Box and don't find a way out. Here's what I did: (initramfs) blkid The result: /dev/mmcblk0p1: LABEL_FATBOOT="system-boot" LABEL="system-boot" ... TYPE="vfat" ... /dev/mmcblk0p2: LABEL=writable ... TYPE="ext4" ... What I then…
Moritttzzzz
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How can I use Kivy to zoom in or zoom out live camera?

I've searched about it and found "scatter", but scatter use for image. I want to zoom it with live camera. Anyone know how can I do that? This is code example I've written, but it doesn't work. from kivy.app import App from kivy.uix.widget import…
siitaw
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Python3 Import Error: undefined symbol: aes_hw_encrypt

I am trying to use DialogFlow to make a small talk chatbot on Raspberry Pi 4, and I am getting this error: ImportError: /usr/local/lib/python3.7/dist-packages/grpc/_cython/cygrpc.cpython-37m-arm-linux-gnueabihf.so: undefined symbol:…
g3holliday
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I can't get sonic pi on the raspberry pi 4

I can't seem to download sonic pi on my raspberry pi 4. I have tried going to the sonic pi website https://sonic-pi.net/ and downloaded from there but it always comes up with an error. I have also tried typing sudo apt-get install sonic-pi and that…
MrLuck
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kivy : TypeError: 'NoneType' object is not subscriptable

My Code is Work ! but I don't Know Why I've get this Error ! can Anyone Know that How Can I Fix It ? :( I Think Error It's About space between my code but I can't fix it. this is my code : from kivy.app import App from kivy.uix.widget import…
siitaw
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2 answers

"Requires Python '>=3.5, <4'" but Python 3 is installed

I want to use the Google Sheets API. For this i need to install a package: pip install gspread oauth2client If I try this package to install I get this error: rsa requires Python '>=3.5, <4' but the running Python is 2.7.16 Python 2.7.16 Python…
ben.reisinger
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Microk8s Raspberry Pi 4 cluster

I am trying to setup a Microk8s Raspberry Pi 4 cluster with 6 Raspberry Pi SoC Ubuntu 20.4 servers. At first it was working after some restart none of the microk8s are working on servers. Getting not running status on microk8s status command. It was…
Simple Humble
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Python using MCP3008 sample frequency

I am trying to make project of visible light communication. Currently I am using a classic LED as TX part and BPW21 photodiode with MCP3008 AD convertor as a RX part. Both of this part run on the RasPi4 withy python 3.7.3. However I have problem…
dejv_IT
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Displaying PPT into RPI

I need to slideshow a PPT(slide by slide) in a RPI, can anyone suggest any python program to display the PPT. Note: Tried using "soffice --show ~/sample.pptx --norestore" command - Opens in Slideshow, Doesn't move to the next slide in PPT Tried…
Jaya chandra
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