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7 views

do i get more io from a cluster?

suppose i have a cluster of 2 pi 4s (8 gig model and 32gb sd cards). i will get 2 seperate computers together having 4 cores and 8gb ram (based on jeff geerling's blog https://www.jeffgeerling.com/...
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4 views

Hostapd settings or better USB WiFi adapter to use for access point

I currently have my RPi 3B setup as an access point using a USB WiFi adapter with the USB id: Bus 001 Device 004: ID 148f:5572 Ralink Technology, Corp. RT5572 Wireless Adapter I am using the ...
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0answers
3 views

problems installing deepspeech on a pi 4

Ive been trying to get Mozillas deepspeech installed but i keep running in to the same problem. here is the terminal output pi@raspberrypi:~/dev/deepspeech $ pip install deepspeech Looking in indexes: ...
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1answer
6 views

how to increase fps of yolov3 on raspberry pi 4

I'm currently doing real time object detection with the help of pi camera using pre-defined weights of darknet and coco dataset using openCV. Currently I'm getting 0.14 fps and my video is too much ...
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0answers
7 views

Camera Settings keep getting reset

Hello I'm sorry if this question will be coming off as vague because I'm extremely confused by this behavior but I'm willing to update with any details you'll enquire on. I'm using ivport-v2 and ...
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0answers
7 views

i have a problem with trying to open dhcpcd on rpi 4

so when i open the wi-fi settings I get the warning "Error saving /etc/dhcpcd.conf". i have tried nothing yet because I don't know what to do
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0answers
12 views

Access Phone Hardware via Raspberry pi

I want to access my Android Phone's Speaker, microphone, and camera via Raspberry pi. Here are the Functions I want to perform : 1. Play specific audio based on the Raspberry pi command. 2. Capture ...
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0answers
7 views

How to build custom ubuntu desktop image with required package

I need to build ubuntu desktop image with my required package, please suggest the steps required. Thanks & Regards.
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1answer
19 views

Start script not working

I have a script that starts my GPIO website server. This allows my phone etc to accress the switches that control certain elements in my camper I would like it to start at after boot in the case of ...
0
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0answers
14 views

Pi Camera not working, red LED always on after boot, libcamera-hello return failed to import fd 21

Problem occurred using raspberry os buster (2021-10-30 released), using libcamera-hello. It returns failed to import fd 21. But it works find on old version raspbian on NOOBS 2.4.5, on the same board, ...
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1answer
17 views

How to nest 4 Gpu with Raspberry Pi 4 Model B?

currently i'm trying to nest 4 Gpus with my Raspberry Pi 4 Model B RAM 8GB. could anyone told me how to do it ? i would to use Raspberry Pi to Mining Crypto.
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0answers
17 views

Generate Barcode in python Raspberry Pi

I wish to generate barcode from a string by using Python program in Raspberry Pi. I encounter the issue below even I am testing with sample source that I found online. This is the sample source: from ...
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0answers
9 views

Forwarding incoming traffic to a pi to another port

So I have my pi 3b connected to another device with an IP address of 192.168.250.1 via Ethernet (eth0). I set my static IP address to 192.168.250.100 so both could communicate. The device wants to ...
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0answers
9 views

How to setup GPIO on a Flask production server?

I am coding a web application with Flask and I come across with a problem where I cannot setup my gpios on my public production server. It throw an error 500 Internal server error. I've realized ...
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0answers
10 views

Recent Source for rtl8192su

I'm having trouble with a WiFi dongle that shows up on lsusb as 0bda:8172 It was working on my Raspberry Pi Model B Rev 2 running Buster until a kernel update. The current kernel is 5.10.63+ Nothing ...
1
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1answer
16 views

.service or crontab for shell script calling python-CLI app and/or python script failing

This isn't necessarily a Pi-specific question, but might be applicable to general Linux. However, my hunch is that the Pi's uniqueness might have something to do with it. I'm trying to run two scripts ...
1
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0answers
22 views

Constant CPU speed?

I'd like to run my Raspberry Pi (3b+) ARM Cortex A53 processor on a constant CPU speed, can be the lowest one, doesn't matter, as long as it does not change. I need this in order to profile some code, ...
0
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0answers
16 views

Connection to WiFi when it shows up

We switch off WiFi an a raspberry over night. In the morning both is switched on together. Unfortunately the pi starts faster than the access point and therefore the pi could not connect to a wifi. ...
0
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1answer
21 views

Can I use USB 3.0 port to power RPI4 + external SSD?

On the Pi-4B, can I use one of the USB 3.0 ports for power, instead of the USB-C port? I will be powering the Pi-4, an SSD drive (Sabrent 512GB Rocket Nano), and a Conbee II — which btw currently ...
0
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0answers
21 views

Trouble communicating between a raspberry pi 3b and Omron plc using pyModbusTCP

Ok so I am trying to communicate with an Omron plc using a raspberry pi running the latest version of raspbian (bullseye in this case). I have been trying to keep it simple, so the only thing else is ...
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0answers
21 views

Bluletooth mic for raspberry pi

I have a bluetooth speaker. I am able to pair it with my android phone and able to take calls via it. So it does have a working microphone in it. When I connect this to my raspberry pi zero 2 W, it ...
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4answers
217 views

Low voltage warning powering Raspberry by means of power bank

I'm trying to power my Raspberry 3 model B by means a Catlyn Power Bank 10000mah just purchased and seems to work fine with an iPhone 11. The problem is that when I connect it to Raspberry, even if ...
1
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0answers
49 views

Is it safe to power Raspberry Pi Zero 2 W directly from computer?

A great feature of the Raspberry Pi Zero is that you can tether it to a PC, Mac or iPad Pro by connecting it directly to a USB port. It can act as a USB-Ethernet-adapter and you can ssh into the Pi. ...
0
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0answers
17 views

Bluetooth not functioning on default Arch Linux (armv6) install

I am simply trying to get Bluetooth to work on the latest version of Arch build for the Raspberry Pi Zero W (original, not 2). I have the latest version of Arch(armv6) successfully running on the rpi ...
-1
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1answer
27 views

GPS Daemon not working on RPi, but works on my Arch PC

I followed this Adafruit Tutorial; trying to make GPS Daemon work on RPi4- on Raspberry OS minimal. Here is my situation: I can see NMEA data is coming thru minicom -b 9600 -D /dev/ttyUSB0. There is ...
0
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1answer
33 views

netplan apply fails with "Cannot find unique matching interface for eth0"

Using Ubuntu 21.10, if I try to set a static IP for my raspberry in /etc/netplan/50-cloud-init.yaml, I have an error when I run netplan apply, that reads: Cannot find unique matching interface for ...
0
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1answer
34 views

How is Raspberry Pi OS bootable on all boards?

A single Raspberry Pi OS instance seems able to boot on any board. Some other OSes don't. I'm under the impression that the various MCUs don't share instruction sets that are fully compatible with ...
0
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0answers
19 views

Add godaddy domain to raspberry pi flask app

so I wonder if there is any way to add a godaddy custom domain to my python flask hosted in my raspberry pi4 by SSH. Thanks!
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0answers
23 views

can't open nano editor - "illegal instruction"

/etc/os-release says raspbian 10 (buster) pi 3 i know this worked previously, because i originally set up the whole pi using nano. but now, every time i open nano, any file, no file, sudo, or not, i ...
0
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1answer
32 views

Camera not detected after first use

I'm currently facing an issue where my Raspberry Pi camera is not detected. However, I did manage to use the camera once before it stopped being detected. There was always a tiny light at the corner ...
1
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0answers
38 views

Design of Pico hardware divider

I recently found out that Pico has "8-cycle signed/unsigned divide/modulo circuit, per core" [1]. To my untrained embedded eye this seems very fast, does anyone know how they did it? What ...
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0answers
30 views

Howto start chromium in kiosk mode at boottime on a raspberry pi [closed]

This is my first post/question... After searching a long time for howto start chromium at boot-time in kioskmode on a raspberry pi and a lot try-and-error, I ended up with this page/idea that did it ...
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0answers
25 views

7" touchscreen fades weirdly in the middle of booting on old Model B

I have an old model B I'm trying to connect to a 7" touchscreen. I put a brand new raspian lite image on an SD card, then followed this guide to get everything working (almost). It starts by ...
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0answers
9 views

No sound on A/V output, how to troubleshoot?

I managed to get the video working on A/V output of Raspberry Pi 3B+ (I got Raspbian) by removing hdmi_force_hotplug, but I cannot get the sound working even though I see one soundcard responding to ...
0
votes
1answer
35 views

Where to set Static IP when running ISC DHCP Server

I've set up a standard ISC DHCP server on my Pi4 running 5.10.52-v7l+ of Pi OS. I'd initially had my static IP set in my /etc/network/interfaces file and that worked ok but I couldn't get WiFi working ...
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0answers
25 views

Raspberry Pi Imager corrupted image file of my Raspbian OS [closed]

Recently I downloaded image file of Raspbian bullseye release and last release of buster , when i flashed them using Raspberry pi Imager the SD card did got flashed but both of these files got ...
0
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1answer
20 views

Power Monitoring Physics Experiment

Hi i am just planning a Physics experiment where i accelerate Ionized Gases onto a target sample. For this Experiment i need to monitor the power constantly over a week or longer. For my later data ...
0
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0answers
16 views

systemd-timesyncd always restarted once got Router Advertisement

On raspberry pi os, pi zeor 2 w, the systemd-timesyncd always restat once received Router Advertisement from router The messages are like following: Nov 28 12:22:46 raspberrypi dhcpcd[837]: wlan0: ...
1
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0answers
27 views

Brushless Motor not spinning when controlling with PWM and ESC

I'm currently working on a drone which is controlled by a Raspberry Pi. I try to controll the motors by using PWM on the connected ESCs, which is described in many guides and forums. For that I use ...
0
votes
1answer
15 views

Mqtt driven python servers not working when launched by crontab -e / @reboot

I have programmed in Python several mqtt driven servers on a Raspberry Pi W (with Buster) to execute a set of commands when receiving a given set of mqtt messages from the mqtt broker (after ...
0
votes
1answer
25 views

Screen tearing - Bullseye vs Buster

I have installed the Bullseye for the testing, and i have noticed that UI is smooth and there is NO screen tearing at all. (But the other things, which works in buster are problematic here on Bullseye....
-1
votes
3answers
49 views

gpio pin set to output 1 but no current flowing through the fan

I have 2 RPi-4. I've been using a fan inside a case that is designed by Canakit to be used with RPi-4. I've been using the fan for a few weeks by connecting it to constant 5V and ground. Everything ...
0
votes
1answer
27 views

VNC poor performance on PI4 8GB Bullseye 64bit

I've a PI4 8gb model with a fresh install of Bullseye 64bit and Im getting really poor VNC performance over 2.4ghz wifi network, both devices the client (a mac book pro i9 w/64gb ram) and the server (...
0
votes
1answer
29 views

Raspberry pi 400 sudo apt-get update problem [closed]

My raspberry pi 400 said this when I ran the terminal command sudo apt-get update Reading package lists... Done E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily ...
0
votes
1answer
51 views

Pi Camera 1.3 not detected despite v4l2-ctl listing it

Before you say that I haven't searched the internet, whenever I type "pi camera not detected" I literally don't see a single unclicked result. I am slowly breaking apart. PI 4 (8gb), V1.3 ...
0
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0answers
19 views

TP-link WN725N / RT8188eu wifi dongle on Pi Desktop OS (NOT on Raspberry Pi hardware)

There's lots of great solutions out there (and here on StackOverflow) for this on Pi hardware but I'm trying to make this dongle work on a PC running Pi OS, which totally foxes the various build ...
2
votes
0answers
30 views

Why does introducing C++ to a Pico project result in "error: duplicate 'inline'" due to using wrong stdio.h version

I have a Raspberry Pi (3) with a Pico SDK freshly installed via the recommended script. I've added the pico-project-generator and created a project as follows: ./pico-project-generator/pico_project.py ...
0
votes
2answers
48 views

Can't connect to Raspberry Pi with VNC Viewer

I have a Raspberry Pi 4, and have been having trouble connecting to it with VNC Viewer. I have connected to it before, but recently I restarted my Windows 10 computer (without installing any major ...
1
vote
1answer
19 views

Unable to trip Relay with Raspberry Pi 3+

I am trying to utilize my RPi 3+ to trip a SPDT Bosch Automotive 12VDC relay in order to activate chicken water heaters when temp below 34 degrees. The program code works well on other, non relay ...
0
votes
0answers
13 views

Nothing else than the ARMv7 RaspiOS is bootable for me

I just bought 2x 32GB Micro SDCards (100MB/s Read, 90MB/s Write) and tried flashing the ARMv7 RaspiOS onto them for both of my 2 Raspberry Pi 4B 8GBs. This is working as intended. But as soon as I'm ...

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