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23 views

ADXL345 sampling rate setting

I want to set ADXK345 sampling rate. I wrote the following code in python3 import time from datetime import datetime,timedelta import Adafruit_ADXL345 import threading import pandas as pd import ...
0
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0answers
24 views

Usb drive not showing in autorun lxterminal but is shown in gui windows?

First of all Thanks a lot for answering my question. When Raspberry pi boots up normally, and in terminal I give the command ->cd /media/pi ->dir I can see my Pendrive name Here and files inside. ...
-1
votes
1answer
46 views

Rasberry PI connect with 4 monitor [closed]

How to connect 4 monitor to 1 Rasberry PI 4 ?
1
vote
1answer
41 views

Powered USB Hub Requirements

I dont plan on powering my Pi through a USB hub, but I do intend on hooking up some HDD's to a powered hub since everything I see so far seems to indicate that the pi cant power multiple HDD's. If ...
1
vote
2answers
57 views

Having problems with ethernet on my PI2 running raspbian buster lite

first of all let me say I'm a beginner so assume I don't know anything. Okay, now my problem. I'm trying to set up my old PI2 to be a terraria server to play with some friends. Everything was working ...
1
vote
1answer
66 views

Raspberry Pi 4 take 4-5 seconds to load GPU firmware and start to loading the kernel, is it normal?

I'm in the stage of optimizing Raspberry pi 4 startup time, supplied with a custom system image created by buildroot. I'm just trying to build a default image like this: git clone git://git.busybox....
1
vote
1answer
27 views

Calling Matchbox keyboard from a web application

I'm creating a kiosk style display running a locally hosted web information application. All command/selections etc are by web buttons etc so I don't need a keyboard during normal operation. However ...
0
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0answers
18 views

Disabling h264 compression on camera stream

Is it possible to get a raw stream from RPi camera without h264 compression? The point is that I'm doing some further processing by gstreamer and either way I have to decode this stream, apply my ...
0
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0answers
71 views

OTA update is Raspberry PI?

want to do OTA(Over The Air) updates in my raspberry pi. I have seen alot of services on the internet like mender.io, but they are all quite expensive. Is there any easy/less expensive way to do OTA ...
0
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0answers
18 views

pip3 broken / can't install httpie

I'm running Raspbian GNU/Linux 8 on a Pi Model B Plus Rev 1.2 (according to cat /proc/cpuinfo) I have python3-pip installed. I tried the following (with & without sudo): pip3 install httpie But ...
4
votes
2answers
175 views

Proper way to bit bang I2C

As already mentioned in this question Reading and writing with smbus package, there are chips that, apart for standard SDA and SCL lines, use a third communication line. This means that this "...
1
vote
1answer
56 views

sudo: command not found

My USB stick is now full of backups, and I need to delete at least one to upgrade Nextcloud. I cant. I try rm -f ./nextcloud-bkp_2017* and I get: rm: cannot remove './nextcloud-bkp_20171211.tar': ...
1
vote
2answers
43 views

Disable LAN Interface duirng boot

Is there any option to disable LAN and USB interfaces during boot. I found options to disable the interfaces using the Following command. echo 0 | sudo tee /sys/devices/platform/soc/3f980000.usb/...
1
vote
1answer
32 views

transmission on 2nd network interface?

I have currently 2 internet connections. One is reasonable fast but the traffic is limited (network A). The 2nd is slower and I do not care about the cap (Network B) :) The Raspberry Pi4 with ...
0
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0answers
46 views

Pigpio Hardware PWM callback is slow

I am trying to drive a servo motor with Raspberry pi. I have selected pigpio library to access GPIO. I need to send a specific number of pulses with a given frequency. But when I callback a function ...
0
votes
0answers
23 views

Is there a way to get DSI output on RPi Zero W?

I'm trying to make an inexpensive smartphone, So I don't want to buy a really expensive small HDMI display, so... DSI. But the pi zero doesn't have DSI output . I've looked into hdmi to DSI adapters ...
0
votes
1answer
32 views

RPi is not finding packages libapache-mod-php5 and php5

It is not finding these packages. Does anybody know why? It is not finding the installation candidate. Here is the result of sudo apt-get install libapache2-mod-php5 php5: pi@raspberrypi3:~ $ ...
1
vote
1answer
47 views

lirc won't irsend - special command required - why?

I'm using a Pi 3B as an IR transceiver, using the general approach described by this article. I found that Raspbian kernel 4.19 and beyond have changed lirc. I followed the guidance in this article ...
0
votes
0answers
98 views

raspotify / librespot won't output audio with my ALSA config

I am trying to get the sound from librespot to my Amiga via A314 (raspberry pi expansion card for Amiga) without any success. At the moment I can play audio with mpg123 on my Amiga by using a custom ...
3
votes
1answer
69 views

Raspberry Pi Zero W serial communication

I just got a RPI zero w and I want to communicate to a device through serial comm. I also have a MAX232 board and a RS232 TTL converter. I want to use one of this boards to be able to communicate with ...
2
votes
2answers
60 views

How can I get libserial for Raspbian?

I've got a hard time installing libserial on my Raspi 3B with the recent Raspbian: Both the libserial docs, and the Debian package directory suggest to install the libserial-dev package but a sudo ...
1
vote
0answers
16 views

Suptronics X400 DAC - sound cutting out over certain volume

I am using a Suptronics/Geekworm X400 DAC with a Pi4. I have an intermittent issue where the sound will cut out over a certain volume. After a couple of reboots, the system will work correctly and ...
3
votes
1answer
50 views

How to control Odrive with Raspberry pi? [closed]

How to interface Odrive with RPi? didn't find much information on the internet so want to know who has done something like this before. trying to use this code:- import odrive import time import ...
0
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0answers
33 views

Default network/interface

After trying to set up a static IP address and doing something (I'm not sure what went wrong) not quite right, I'm left with a broken network/ interface. I'd like to reset it to its default state (...
2
votes
2answers
63 views

How to power devices when all GPIO pins are in use

I have a number of RPi 4 boards that I'm clustering together in a single case. To consolidate power to a single wall outlet, I have them all connected together via a dedicated switch with PoE at each ...
0
votes
2answers
81 views

Will SD-card in an RPi 4 always be faster than USB 3.0 writing/reading to an installed web-server?

Setup: RPi 4 with LAMP on IT sucks DK My SD card is quite quick sure (it's a Class 10 too and all) but my question is this: Would there be increased performance if I hosted my web-server files on a ...
1
vote
0answers
62 views

How to use Rpi UART to debrick a bricked LinkSys G Router?

I was working on a project that 'debricks' my bricked router(WRT54GL). Since this is my first time with Serial communication on any device, I have some questions to ask. This is the pinouts for the ...
1
vote
1answer
24 views

Can I clone an existing OSMC installation onto a separate card that runs Berryboot?

So I have a Raspberry Pi 3B that I have setup to run OSMC. I would like to use the same Pi, but be able to boot from a choice of systems. Berryboot seems like a perfect solution, but is there a way ...
1
vote
1answer
30 views

Don't know how to connect multiple MCP23017

I need more pins on my raspberry pi 3 so that I can use it to manage the lights in my house. I am going to use relays and MCP23017. I need to know how to use 8 of the MCP23017 on my raspberry pi. If ...
0
votes
0answers
17 views

Increase analog volume on OSMC

I am running OSMC (November 2019 release) on a Pi 3. The Pi is connected to a TV via HDMI, but I would also like to be able to listen to music over my stereo without turning on the TV. Therefore I ...
1
vote
0answers
42 views

How to detect LCD touch-display? and automatically configure for display?

A rPi3 B+ is Raspbian configured with a 3.5 Waveshare touch display HAT. There are two commands that toggle between the HDMI output and the HDMI output. git clone https://github.com/waveshare/LCD-...
2
votes
2answers
35 views

Raspberry Pi 3B slow download and fast upload speeds over ethernet

I have a RPi3B connected via ethernet to a GbE Switch that also connects to my main PC. This PC gets 210/105 Mbps since it has a GbE port. I know that 3B only has a 10/100 ethernet port, but I'm ...
2
votes
1answer
34 views

apt-get update - trying to install python OpenCV on rasp pi?

$ apt-get update Reading package lists... Done E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) E: Unable to lock directory /var/lib/apt/lists/ W: Problem unlinking ...
3
votes
2answers
75 views

hostapd AP over both wlan0 and eth1

My hardware setup is currently: Router -> RPi (eth0) -> RPi (wlan0) -> subnet for my devices My desired setup is: Router -> RPi (eth0) -> RPi (wlan0 + eth1) -> subnet for my ...
1
vote
0answers
76 views

How to be sure pi-hole is working and how to make it block youtube ads?

I have installed pi-hole on my raspberry to stop ads. For the moment, I added the IP of the raspaberry to the DNS list in my Mac. The list of the DNSs in my Mac is the following: 8.8.8.8 8.8.8.4 ...
1
vote
0answers
43 views

raspberry pi GPIO input value changing randomly

We attached a wire to pin 40 and another one to 3V3 supply. Also attached an LED+resistor between 5 volt and pin number 38. When the wires do not touch each other, the LED constantly emits and all the ...
1
vote
2answers
52 views

Is there any way I can get the latest version of postgresql onto my pi?

I'm a noob to linux and pi so may just be missing the obvious but it appears the latest version available for the pi is 11.x which does not support generated columns. I am in the process of porting an ...
1
vote
0answers
18 views

Using Hamachi messes up with the Pi's networking

I have a Raspberry Pi 3B+ running Raspbian Stretch with no problems since over a year. I recently tried install Hamachi from the official LogMeIn website, and connected it to my LogMeIn Hamachi ...
1
vote
0answers
17 views

Controlling PWM by wiringpi through python programming [closed]

Can anyone give me the program for controlling PWM by wiringpi through python programming? I have already searched on the net but could only find program through C programming.
0
votes
0answers
18 views

Insert real-time sensor data without using a csv file and display real-time accuracy

Hello guys im having a problem about inserting real-time data directly without using a csv file and dislay real-time accuracy of the data Here's the Program : import os import time from numpy import ...
1
vote
2answers
37 views

Pi 3B Boot Problem

I have a 3B that has worked reliably for a year and now will no longer boot (or if it does, is invisible on Ethernet). I have no HDMI compatible devices, so I cannot verify functionality that way. ...
1
vote
1answer
32 views

Raspberry pi connection to wifi

I am a newbie to Raspberry Pi as I want to connect the Raspberry Pi to my Wi-Fi network which has a gateway, SSID and password. When the Raspberry Pi is booting up it connects automatically to Wi-Fi, ...
0
votes
0answers
26 views

Cannot setup Samba

I want to access files from my Raspberry on my Windows machine. I did it previously, but I resetted both my devices some time ago. I haven't made any advanced network configurations to them yet. I ...
1
vote
1answer
95 views

Weird display on VGA monitor, Ubuntu Server 19.10 on Raspberry Pi 4

UPDATE: As I suspected lately, Ubuntu Server actually boots up. Nothing worked until I tried using an actual HDMI monitor instead of an HDTV or VGA monitor. I suppose the TV will work once I install a ...
1
vote
1answer
45 views

Connecting Raspberry Pi to 5V UHF RFID reader over TTY via level shifter

I want to keep track of UHF RFID stickers. I'm hoping to do this using a Raspberry Pi zero attached to an UHF RFID reader. I acquired this reader: https://www.aliexpress.com/item/32848525319.html ...
2
votes
1answer
36 views

My sd card that was 16 gb its now only 236 mb

I used a 16 gb sd card to installl retropie in my raspberry pi 3, but now my computer says its just a 240 mb card. How do I format it to the original state?
1
vote
4answers
32 views

Cannot run 2 apps with rc.local but it works from command line

I have 2 apps, lets call them /home/pi/app1 and /home/pi/app2 If I type into console sudo /home/pi/app1 & sudo /home/pi/app2 both apps execute without issue When I add the same line to /etc/rc....
0
votes
1answer
29 views

Why am I getting 'Authentication Failed' when reading Gmail using Getmail on Raspberry pi3B with Buster?

I have recently installed Raspbian Buster with desktop on my Pi3B. I was previously using Stretch but ran into issues with a certain application unrelated to this question. This question concerns ...
1
vote
3answers
101 views

Is it possible to run my Raspberry Pi in a low level mode?

I bought a Raspberry Pi 4 Model B/4G B. I want to use it 24/7 day and night to run a program over the internet. This program doesn't ask for much resources to run. When I plugged it in the socket, the ...
2
votes
1answer
56 views

Hosting a Website or Websites Using Raspberry Pi 4

Say that I have a website that gets approximately 5-10k hits per day, and I want to run a full LAMP Stack and phpMyAdmin to manage the mysql databases. Would 1 Raspberry Pi board suffice to handle ...

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