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10 views

Raspberry pi system monitor security

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 ...
1
vote
1answer
12 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
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0answers
14 views

how to connect Rasberry Pi to windows database

I am very new to Rasberry pi, I have written a program in python and connection with postgre sql. I am running python application on Rasberry pi and my database is on Windows server in LAN. Can anyone ...
0
votes
0answers
18 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 ...
2
votes
1answer
24 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
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0answers
23 views

Raspberry Pi 4 EEPROM configurations

As I am sure most of you know by now, the Raspberry Pi 4 uses an onboard EEPROM for the initial boot configuration. The Foundation has stated that they plan to have a tool that can modify the embedded ...
1
vote
1answer
31 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
28 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
0answers
28 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
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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
13 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
170 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 ...
-1
votes
0answers
15 views

Need Help from python console to listbox

how display output data from python shell to GUI listbox using button ?
1
vote
0answers
22 views

Combining programs dht11 and soil moisture sensor

Hey I'm doing a project and I need to combine programs of dht11 sensor and soil moisture sensor..but they're in different directories and their libraries also. I'm not able to run them simultaneously ...
1
vote
0answers
37 views

How can Rpi4B python use USB Serial AT commands to control a 4G/LTE module to text SMS?

I have purchased this 4G HAT and I'm using it with this module in a raspberry 4. I use the USB connection. I installed a ppp connection and everything is working correctly. My problem is: how do I ...
0
votes
0answers
28 views

Xbox 360 controller not listed as HID device on a Raspberry pi

I'm trying to use an Xbox360 wired controller to jog a CNC machine driven by a Raspberry Pi 4. I'm trying to use a node.js module called xbox-controller that interfaces to the Xbox360 controller via ...
-1
votes
0answers
18 views

Way to have a python script running on a desktop pc continuously communicate with a python script running on a raspi3? [closed]

I have a python script which generates a set of tuples upon every iteration. I want the python script running on the raspi to receive the values as quickly as possible and do further processing. Both ...
0
votes
0answers
15 views

Gateway Keeps Resetting to Old Gateway

I'm not that familiar with Linux but I'm running a pi-hole. I've just changed my network config on my router (Draytek) that supports VLANS and interlan routing. I have the PI on its own VLAN (2) LAN 3,...
1
vote
1answer
30 views

Writing to GPIO 1 (ID_SC) witth Pigpiod C interface

I am writing a general-purpose stepper motor driver C shared library for the Raspberry Pi using PIGPIO (pigpiod C interface) for 4 to 7 motors using A4988 drivers. I designed an interface board (...
2
votes
0answers
25 views

PiCamera Video Corruption

I'm trying to save video from my picam and it ends up like this: import picamera # set up camera camera = picamera.PiCamera(); camera.resolution = (640, 480); camera.framerate = 24; # record camera....
1
vote
0answers
24 views

Why are my AT commands inconsistent?

Devices: RPi3B+, USB to TTL CH340, SIM800C GSM module Here are the connection between the USB to TTL and GSM module respectively 5V-VCC, TxD-RxD, RxD-TxD, GND-GND Then I attach this USB to TTL to ...
0
votes
0answers
25 views

As an Access Point (WiFi Repeater): how to set up multiple WiFi/SSID

I had successfully set up my raspberry pi as an access point as WiFi repeater followed this guide: Access point as WiFi router/repeater, optional with a bridge. I would like to set up my raspberry ...
0
votes
0answers
27 views

Poor std::atomic performance on Pi 4

I recently migrated a project of mine from Pi 3B+ to Pi 4B only to find that it now runs much slower than before. After investigation, it appears the culprit is the atomic library that I use heavily. ...
0
votes
0answers
14 views

dhcpcd working when its not installed, but doesnt work when its installed

So ive been using dhcpcd all this time without realising that the package isnt installed. The problem is that the ip on my laptop isn't the same on the raspberry pi (which is hosting an ap). When i ...
1
vote
0answers
14 views

RangeError: index out of range error

I run Noble on the Raspberry Pi 3 (with Bluetooth) and i receive RSSI values from the nearby beacons that i have. However, if noble is ran the whole times i occasionally get the following error. ...
2
votes
1answer
47 views

How to write protect in DS2431 Maxim EEPROM using Raspberry Pi

I have connected my circuit as mentioned in the below link: Writing/Reading an EEPROM chip using 1-wire bus I am able to read and write through commands mentioned in the link. I would like to know ...
0
votes
0answers
28 views

Trigger camera once in an infinite loop

I'm building the following script to be used with a RPi 4, with a USB Webcam and a TFMini Plus Lidar sensor (also USB plugged): import time as t import serial import datetime import cv2,io,imutils ...
0
votes
0answers
20 views

Suddenly can't connect to internet but SSH is ok

I was trying to fix a problem that the pi can only connect to the internet using the 5-Ghz wifi but not 2.4-Ghz, after messing with router and the network manager settings, I couldn't solve it but end ...
0
votes
0answers
20 views

No Audio on Raspbian

I tried many answers on different websites. Raspberrypi.org, this site, linux.com, and others I cannot list. I tried Analogue with sudo raspi-config. I also tried amixer cset numid=3 1. I tried ...
2
votes
0answers
24 views

Mount network share on boot with hidden password

When I was trying to mount a network share on boot by adding the following line to the /etc/fstab file: //<server>/folder /home/pi/target cifs username=<username>,password=<password&...
0
votes
0answers
15 views

Network problem with RPi Compute Module

I have a RPi 3 compute module in a dev board that was given to me by another developer. It has code on it I need to test. This CM is running Raspbian Jessie. The unit is connected via Ethernet cable ...
1
vote
1answer
195 views

Ethernet not found while ethernet cable is pluggedd in

I am running AGL (more about it here) image on Raspberry PI 3. I want to send application files from my laptop (where i build it and which has stable wi-fi connection) to the raspberry using scp. What ...
0
votes
1answer
26 views

how to transfer file to Windows 10 PC using SFTP command?

I'm trying the following command from the Pi to the PC (169.254.112.124): sftp pi@169.254.112.124:/C:/Users/Desktop/testtest.xml But I get this error: ssh: connect to host 169.254.112.124 port 22:...
0
votes
0answers
24 views

Is it fine to power a buzzer that requires only 3V using the 3V3 pin of the Raspberry Pi 3 B+

I have a solid state relay but I think I don't need it anymore.
1
vote
2answers
18 views

How to install openforti vpn on a vanilla raspberry PI with raspian image?

Someone managed to get openfortivpn installed and working on a Raspberry PI with vanilla Raspian image? It seems it should be supported but all I get with apt-get install openfortivpn is that "the ...
0
votes
0answers
16 views

Did anyone get a Miracast display working with a Pi 4?

I have tried using miraclecast, which builds without problems but won't find a Miracast screen which my Windows 10 laptop has no trouble to work with. pi@raspberrypi:~ $ sudo service wpa_supplicant ...
0
votes
0answers
14 views

Install stm32cubeprogrammer on raspberry

I need a help . How can i install stm32cubeprogrammer on raspberry pi 3 . thanks .
4
votes
5answers
1k views

How to start a python script at boot

What I tried: crontab -e creating a desktop entry at /home/pi/.config/autostart edit /etc/rc.local My python script: import os from gpiozero import Button from time import sleep from pynput....
1
vote
1answer
308 views

How should the J2 header be used on a raspberry pi 4?

The posts I found online show conflicting information on how the J2 header should be used, and seem to be derived from trial and error. None of the answers I managed to find seem authoritative; i.e. ...
0
votes
0answers
23 views

Setting up SSH when using different wifi networks?

Bit of a raspberry pi newb here so bear with me! Im using a raspberry pi model 3 for a university project, which means that I hop around different locations and have to get on different wifi networks. ...
3
votes
0answers
21 views

Is debug logging (to file or UART) available for firmware (start4.elf) portion of boot? [Pi4]

Is there any place that debugging messages get logged during the start4.elf portion of the boot process? BEFORE start4.elf runs, when the EEPROM is running, it's possible to configure UART output. ...
0
votes
0answers
21 views

Hardware PWM on Raspberry Pi 2 using .NET Core 3.1

I would like to use hardware PWM on a GPIO port to generate RC-5 IR codes with an IR LED. I read that .NET Core now has PWM support and that the Pi has at least one PWM-enabled GPIO pin, but I can ...
1
vote
1answer
33 views

What is the best way to connect to the Raspberry Pi Zero?

I have got this new raspberry pi zero and I am trying to figure out the best way to access it. It would really help if there is a way to do this without the need of a miniHDMI cable. I would prefer to ...
2
votes
1answer
35 views

Raspberry Pi4 vs 4B--synonymous?

I am embarking on a cluster project using PoE hat. PoE hat is compatible with RPI4B. Vendor is selling "Raspberry Pi4." https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications shows only 4B, so I ...
1
vote
1answer
63 views

hostapd problems while setting up Pi 4 as Access Point

First of all i want to say that i'm new to all of this, so please dont hate me if the answer to my problem seemed obvious to you. I just tried to follow this tutorial to set up my Pi 4 as an Access ...
0
votes
2answers
28 views

Broken /etc/network/interfaces file

So at first I had a problem with my raspberry pi connecting to any Wi-Fi connection because of an error which sounds like this "no wireless interfaces found". I've tried several fixes, nothing worked ...
0
votes
0answers
15 views

Turn off HDMI output after receiving HTTP GET request

I'm building a security camera setup, and am displaying the camera feeds (RTSP streams) using a Raspberry Pi. I only want the display to be active when a motion event is triggered - this is handled by ...
3
votes
2answers
54 views

Raspberry Pi in client home and security

For a project, I got to put Raspberries in client's homes, by a lot of clients. I also have to be able to ssh to them, so I can update them. My solution for the ssh is to set up a VPN from a server ...
1
vote
0answers
21 views

Cord Tension sensor

I need to detect when the tension in a (micro) winch cord either exceeds or falls below maximum or minimum tension. The winch is powered by a stepper or servo motor and the intent is to back off when ...
0
votes
1answer
20 views

can't login after modifying .bash_aliases

system: raspbian lite 10 I made the .bash_aliases with some aliases. Accidently i put if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi into .bash_aliases instead of .bashrc. After sourcing ...

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