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24 views

How to add multiple RJ45 ports to Raspberry Pi 4 to turn it into a switch?

I am building a little network lab. I want to turn one of my Raspberry Pi 4 into a switch. I already have a network manufacturer docker image to run on it. Still, I have only one RJ45 port. How to ...
0
votes
0answers
12 views

Cannot manage wlan0 from desktop

Good day all Pi folks! I have a Pi 3A (buster) which has the onboard Wifi (wlan1) configured as an access point. I installed a second Wifi USB TL-WN725N which comes up as wlan0 and is the outside nat'...
1
vote
0answers
11 views

Raspberry pi commection

Hi i wanted to ask if you could help me i am trying to connect two pis together wirelessly. I made both pis an access point does rhat effectthem must one of them be a simple pi with the configurations ...
0
votes
1answer
15 views

Need a constant power supply for raspberry pi

I'm using a raspberry pi which is connected to a gps. What we do is we plug the raspberry pi to a truck with a car charger so we can track it. But the problem we are facing is that the truck moves ...
-2
votes
0answers
16 views

buy salvaged laptop internal webcams

I am looking for where I can buy some old salvaged internal webcams from old laptops. No matter what I put in the search engine, all I get are external webcams. Does anyone know where I can find them?...
0
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0answers
14 views

Mini-UART on RPi 3 and earlier broken if parity bit used

This is actually not a question but a post about an issue I was seeing and figured out root cause and want to share it with the community. I have a sensor which every 1 second spits out a 32-...
0
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0answers
11 views

3.5 inch DPI display setup on Android things. How to?

Hi please help with installation display to my Raspberry. It perfectly work with standard OS but I doesn't understand how to install it to Android. Display connected via GPIO. Does it general ...
1
vote
0answers
22 views

setup two Raspberry Pi 4s to communicate to each other through AdHoc

I am working on a project where there is a need for two Raspberry Pi 4s to communicate to each other though AdHoc connection. I managed to set up AdHoc on both Pis but I couldn't make them to talk to ...
0
votes
1answer
22 views

opencv not working on Python3

I have installed OpenCv on my Raspberry pi Model 3B. It is working for python 2.7 but not for python 3 The error im getting is: pi@raspberrypi:~ $ python3 Python 3.7.3 (default, Dec 20 2019, 18:57:...
1
vote
0answers
12 views

Redundant PiServer and Database

I'm running a Raspberry Pi with PiServer from which 5 Raspberry Pi clients boot over network. On the PiServer machine is also a database (mariaDB) that holds some information which is displayed on the ...
0
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0answers
18 views

Trying to remove Blynk server from Raspberry Pi 3

Having purged the installation files for Blynk local server on my Raspberry Pi, there seems to be a relic left & I despite hours spent searching, I can't find how to get rid it, so any help would ...
0
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0answers
22 views

Using a pi as a wireless access point with bridge - incorrect password

I'm trying to set up my raspberry pi 3 running a fresh install of raspbian buster as a wireless access point with a bridge to ethernet to give connected devices internet access. I followed the ...
1
vote
1answer
24 views

Is it safe to use 3V3 on raspberry pi 3B+ to control a 3V DC motor?

I want to connect power to a 3V DC motor straight from 3v3 GPIO. Is it safe or will I brick my Pi 3B+ ?
1
vote
1answer
19 views

How to automate filesystem expansion

I have 3 commands I have to run manually to expand my USB filesystem. I am looking for help on automating this in a script that does not need user input at all. I understand you can expand the ...
0
votes
0answers
22 views

Controlling LED Matrix display with TF-S6UW0

I am using Rasberry pi 4 (4GB RAM version). What I am trying to do is be able to set the text of the matrix screen using a command or by calling a script (preferably in python). I am using a P10 ...
1
vote
1answer
22 views

Pi Zero WH, headless, *sometimes* fails to get onto the LAN. What logs to look at?

I have a RPI Zero WH. It's headless. I have SSH and WPA-CONF files. I recently did a showdown -P to turn the pi off. I moved the pi to a different part of the house. When it powered up, it was ...
1
vote
0answers
25 views

RPi.GPIO + single channel relay + solenoid lock

I'm working on my first python/hardware project and I want to create a simple (or at least I thought it was simple) cabinet lock, which will lock/unlock when certain RFID tags are approached to the ...
0
votes
0answers
25 views

Find More Quality Camera [closed]

I am looking for a good Camera Quality for Raspberry, I have a project that raspberry camera should read from pc monitor text, the standard Raspberry Camera V2 has 8MP and I'm Looking for more pixels ...
1
vote
1answer
19 views

Analog Audio Output resets to 0 automatically

I have a RP 4 and I am trying to get sound out of the minijack socket.. The GUI loudpseaker icon offers analog & HDMI. When I select Analog or HDMI, push the volume to max and close the tab, the ...
0
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0answers
20 views

Create folders with FTP

I am using the RPi as an FTP Server using vsftpd and trying to save logs and images from a Windows PC using the program Cognex Insight Explorer, when using a path in Windows I can save the file ...
1
vote
1answer
26 views

Issue with nodogsplash saying it needed updateed libmicrohttpd-dev, but I seems no new update have been updated?

2020][1900](src/main.c:541) Starting as daemon, forking to background [5][Thu Feb 27 11:50:04 2020][1901](src/main.c:254) MHD version is 0.9.62 [3][Thu Feb 27 11:50:04 2020][1901](src/main.c:270) ...
0
votes
0answers
19 views

Connecting Iphone 5s to the raspberry Pi

Is it possible to connect the Iphone 5s to the Raspberry Pi through a usb cable? If I plug it in now it starts charging. And when its connected, is it possible to give the telephone a command to make ...
0
votes
0answers
12 views

How to get 10-bit depth black and white image from raspicam v2.1?

I am a little bit confused about image capturing by Raspberry pi camera V2.1 [1]. I working on the Raspberry pi 4. I know how to get 8-bit depth black and white (BW) image from it on the C++ level ...
1
vote
0answers
27 views

Raspberry Pi Raspbian - check LTE USB modem SIM card phone number

I have LTE USB modem attached to Raspberry Pi 4 with Raspbian installed. LTE modem was configured automatically and Internet connection is up. I don't remember SIM card phone number. How can I check ...
0
votes
0answers
32 views

Getting garbage characters on RPi3 UART console, logs on HDMI are perfect

I have searched a lot on internet and tried all suggested solutions like criss-cross connection, checking loose connections, changing baud_rates and using GND connection for UART, but nothing seems to ...
1
vote
0answers
8 views

KNN Model, cannot import from Windows. What to do for Raspberry pi with Low RAM

I have a raspberry pi 2b with 1 GB of RAM. I want to train an ML model with about 6k images. I followed https://github.com/kevinzakka/blog-code/blob/master/knn/knn.py and I have a model that works ...
0
votes
0answers
9 views

File Manager instantly closes when opened, but works from Terminal

I found this Question:"File Manager instantly closes when opened", already posted, but I could not Answer there because it is protected and I am 100% New/ 0 Reputation on StackExchange. In my case, ...
1
vote
0answers
36 views

How would I go about writing a program(python) to mimic the use of an AND Gate using Raspberry Pi

How I set up my breadboard: Placed SN74LS08N (AND gate) on a breadboard. Connected IC pin 7 to GND and IC pin 14 to 5 V for IC to get powered. Connected GPIO pin 16 to IC pin 13, Connected GPIO pin ...
0
votes
0answers
24 views

What PinPad for Raspberry Pi POS with no payment involved?

I’m developing kind of a POS system for my school cafe. It doesn’t need to work with payments, instead, it works with the member system. The system will be running in Raspberry Pi and Python, ...
1
vote
0answers
24 views

Getting gstreamer to produce out of usb-audio

I cannot get gstreamer on raspbian (buster) to play through a usb-audio device, despite other players (vlc, aplay) being able to do so. but i need gstreamer because of its API access, for mpd players ...
1
vote
2answers
40 views

Pi 3a added 2nd Wifi TL-WN725N did hostAP procedure but desktop says “No Wireless Interfaces Found”

did this here: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md ... using wlan1 (onboard pi wifi) instead of wlan0. I get "No Wireless Interfaces Found" on the ...
3
votes
0answers
24 views

Raspberry PI as slave - sending data back

First, I read Raspberry as an I2C SLAVE and followed everything in there. Great thread. However, this thread does not address anything about sending data back. This is the scenario: rPI4 as master, ...
1
vote
1answer
35 views

opencv installation

`I tried installing opencv on my raspi 3B using pip, on trying to import cv2 i am getting an error Edit: code lines: Successfully installed opencv-python-4.1.1.26 `(cv) pi@raspberrypi:~ $ workon cv ...
1
vote
0answers
16 views

Should I use Berry boot or 2 SD cards?

Would it be better to swap SD cards to switch from Retropie to Raspbian, etc. or use Berry boot on same SD card and store Roms on my network or USB stick? Also, does anyone have experience using ...
0
votes
0answers
12 views

Unable to get CAN down and therefor reset to work. Any suggestions?

I'm able to use get two can devices configured and working over spi. But after about a half hour (with TxQuelen = 1000) I get "write : no buffer space available" messages. Can't find how to clear or ...
0
votes
1answer
30 views

Help with Port Forwarding for College Project

Hello Guys im doing a group college project for my final year it involves a CCTV type project using the raspberry pi camera and a website with a php login system to the website, I have a Pan Tilt hat ...
1
vote
2answers
43 views

What is the correct way to connect serial console on RPi4 Model B?

My config.txt has: dtoverlay=pi3-disable-bt enable_uart=1 at the end and my cmdline.txt has: root=/dev/mmcblk0p2 rootwait console=tty1 console=ttyAMA0,115200 And here's how I've connected it: I ...
0
votes
0answers
22 views

Raspberry pi system monitor security [closed]

How de do. I'm considering using a Rpi to display our system stats and build monitors for the codebase in our office. I've been questioning how i can secure it down so no one will be able to get any ...
2
votes
1answer
31 views

To perform only one task

How can we prioritize raspberry-pi3b+ model so that if my "code on python" is running then the raspberry-pi should not perform any other task in background. Since i have to calculate time taken by my ...
0
votes
1answer
33 views

how to connect Raspberry Pi to windows database

I am very new to Raspberry Pi, I have written a program in python and connection with PostgreSQL. I am running python application on Raspberry Pi and my database is on Windows server in LAN. Can ...
1
vote
0answers
33 views

Ubuntu 19.10 64-bit on Raspberry PI 4: How to unlock 100 MGz as min cpu frequency?

Is there way to unlock min cpu frequency for Ubuntu 19.10 64-bit for raspberry pi? First, this linux does't have /boot/config.txt similar to raspbian or ubuntu 18.04 from berryboot Next, the ...
1
vote
1answer
32 views

Hard wire power to raspberry pi 3b

I have this adapter (https://global.rakuten.com/en/store/denshi/item/55154/) powering a set of RGB screens that I picked up from adafruit. Essentially I completed their pi/rgb matrix project and want ...
0
votes
0answers
50 views

Raspberry Pi 4 EEPROM (and USB firmware) configurations

A while ago, the Pi Foundation mentioned that there was an update for the USB driver (yes, apparently more components on the board have firmware above and beyond drivers loaded by the OS) to reduce ...
1
vote
1answer
37 views

Multiple Hat and GPIO

I need, for a project, to connect on the same RPi (a 3B+) a NFC lector, the Sense Hat and also be able to use 26 GPIO port for additionnal LED and button. The project is a kind of a physical "Keep ...
1
vote
0answers
33 views

RFID reader/writer

I'm creating a clocking in system for work and I'm considering using a raspberry pi for the card interface. Having never used one before I just want to check if this is possible. I've seen a few ...
1
vote
1answer
44 views

How I will get negative ADC values by using High precision expansion board with raspberry pi 4

I am trying to get negative ADC value by giving -2.5 v to AD/DA high precision expansion board with Raspberry Pi 4. I am using python programming with twos complement of buffer size 200, unfortunately,...
0
votes
0answers
14 views

Using Phone and App inventor as a Remote control to control a Pi RC car [closed]

So I am a beginner in raspberry pi and python and app inventor but I don't need to know at the moment the "how" of this project. I want to know if my android phone that is programmed with MIT app ...
0
votes
0answers
19 views

PiHole doesn't show ipv6 address while docker host has one

I'm running PiHole in a docker container on a Raspberry Pi 4. I've disabled DHCP on my modem router and enabled it on the pi. On IPv4 everything seems to be working just fine, but on IPv6 devices ...
0
votes
1answer
611 views

ERROR: Environment '/home/pi/.virtualenvs/cv' does not contain an activate script

I am trying to install opencv 4 on my raspberry pi 4 using these instructions from this website but I have come across an error when I run the command mkvirtualenv cv -p python3. The error is found ...
-2
votes
0answers
17 views

Need Help from python console to listbox

how display output data from python shell to GUI listbox using button ?

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