All Questions

2
votes
2answers
59 views

Python3.7 with Numpy on Raspbian

Goal: Install Python3.7 on the Raspberry Pi. Then install Numpy for Python3.7 Found this very useful Github Gist: https://gist.github.com/SeppPenner/6a5a30ebc8f79936fa136c524417761d Ran the ...
0
votes
0answers
16 views

How can I set up video calling with out the video lagging 3-5s? (lag is local to the pi, before transmission to other clients)

I am doing video conferencing on my Raspberry Pi 3b+. I have tried both Jitsi (better) and Google Meetings but both of them have a 3-5s lag between the real world and the self-image shown on the pi (...
1
vote
1answer
44 views

Simple command line to write and read data from UART (serial) loopback

I want to connect the TX and RX pins together and from the command line echo some text into /dev/ttyAMA0 and tail the result (from somewhere). I ultimately want to communicate with an Arduino but ...
0
votes
1answer
33 views

Is it possible to toggle 3.3V and 5V header pins on and off? [duplicate]

Header Pins 1, 2, 4, 17 are labled 3V3 and 5V on the schematics but the connections to the BCM and/or regulators are not in their documents. It appears the 5V node is coming from the raw USB/external ...
-1
votes
0answers
18 views

SD Card reader not detected

I have hard shutdown the raspberry pi zero and after that, I cannot read the SD card in into it; reader (connected to my Linux OS pc). But the sd card works in the pi connected with LCD TFT 5 inches,...
0
votes
0answers
16 views

Failure to build QT5 5.12.3 on Raspberry Pi zero

Following the instructions in https://www.tal.org/tutorials/building-qt-512-raspberry-pi,: wget http://download.qt.io/official_releases/qt/5.12/5.12.3/single/qt-everywhere-src-5.12.3.tar.xz tar xf qt-...
1
vote
0answers
15 views

Run script or command on Pi based on Alexa voice command or skill

I'm building a power relay controller based on RPi and I want to be able to turn my whole system off by asking Alexa to shut it down. I have considered using an Alexa-controlled "smart" relay to ...
0
votes
0answers
8 views

Adding Subtitle font in OSMC

Hi I have OSMC installed on berryboot. And I want to Add my own Subtitle fonts (.ttf). I tried to locate Font file from OSMC File Manager. But I only found a file named "addons" this was the path: ...
0
votes
1answer
30 views

False Contact Closures - Do I Need Physical Pull Up Resistors to Resolve?

I'm running Raspbian Jessie 4.9.35-v7+ on a Pi 3 Model B. I cobbled together a basic python script to monitor a GPIO pin and send a network signal to a remote application, made two copies of the ...
0
votes
1answer
18 views

What does “ ad9833.c:36:2: warning: implicit declaration of function ‘bcm2835_gpio_fseL’ [-Wimplicit-function-declaration] ” mean?

I'm trying to generate signals using an AD9833 and a raspberry pi 3 model B+ but each time I build my programme I have this error message: ad9833.c:36:2: warning: implicit declaration of function ‘...
0
votes
0answers
7 views

How to start PPPD connection on boot and handle it in case of network failures?

I have to setup Quectel EC25-E hooked up to my Rasp Pi Zero. I can setup the ppp connection but manually. This is what I do: Quectel module ppp connection However, I have to make this pi headless ...
2
votes
1answer
26 views

Display IP Address on LXPanel

I'd like to print on the LXDE Pannel (LXPanel) the IP address of my Raspberry Pi, so I can have a direct view about how to connect to the Pi from another computer when I reboot it, since its IP is ...
1
vote
1answer
21 views

Connecting Raspberry Pi to SFM3520-OP fingerprint module

I want to connect an SFM3520-OP fingerprint module with the RS232C serial port to the Raspberry Pi UART but I am doubtful about their logic level. Should I use a Max2323 or does it not need it?
0
votes
0answers
15 views

RPI3 Stuck in SSH on boot

I can not open the graphical interface, I have used startx I get a bunch of paragraphs pop up and that is the furthest I can get. When I start up the raspberry pi 3, It says the bluetooth thing is ...
1
vote
1answer
16 views

waveshare 7" LCD H : uses & reports wrong HDMI resolution

I recently got a Waveshare 7" LCD (H) with 3B+, running Raspbian updated to buster (uname -a says Linux rpi33 4.19.42-v7+ #1219 SMP Tue May 14 21:20:58 BST 2019 armv7l GNU/Linux) I set config.txt ...
-1
votes
0answers
33 views

Game engine for raspberry pi [closed]

I'm looking to build a 3D game for a raspberry pi 3b, I tried unity but doesn't work please give me advice on what game engine to use?
2
votes
5answers
592 views

Cut power on a remote Raspberry Pi 3 via another raspi

I'm building a system with a raspberry pi located in a very remote area connected to internet with an internet stick. The tests are promising so far but the pi freezes every here and then and I'm not ...
0
votes
1answer
26 views

virtual keyboard RPI 3 model B

I tried installing the virtual key board as described here: Virtual keyboard activation on my RPI 3 model B Board but it doesn't work at all I get this when installing: pi@raspberrypi:/ $ sudo ...
-1
votes
1answer
20 views

end Kernel Panic

When I start up my Raspberry Pi it goes through the lines of code like usual but ends at "end Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)". I have tried to get to ...
0
votes
1answer
30 views

Raspberry pi and microbit working together

Can I do a pin out from raspberry pi onto a breadboard and have a microbit setup to receive that pin out and have the microbit run a command on pin in? Or can I have the raspberry pi send a signal to ...
0
votes
0answers
18 views

No available Audio Device after switch from NOOBS to Raspbian Stretch

my program uses Pygame to play sounds. I used Noobs before and my program worked fine in Thonny. Now, i switched to Raspbian Full Stretch and now I get the error No available Audio Device. I already ...
-3
votes
0answers
18 views

ADC with low resistance

I am trying to monitor a water tank level sensor, the resistance is only 30-220 ohm and doesn't seem to make enough voltage drop to be monitored. Does anyone have any suggestions on how I can ...
0
votes
0answers
26 views

Structure needs cleaning in raspbian while compiling opencv

Good morning I just want to ask a question about an error message I got all the time is that my system Raspbian said that the structure needs cleaning everytime I started to compile opencv and when ...
1
vote
1answer
27 views

Edit crontab gone after reboot

When I edit my crontab file with crontab -e my changes are gone after a reboot. I execute crontab -e. I change my schedule and press control + x. I save the file with Y. (it saves to /tmp/randon ...
0
votes
1answer
64 views

How can I set my up to be WiFi AND ethernet router simultaneously?

I want to use my Pi as a fully fledged wifi and ethernet router. I'll connect an external modem/phone with tethering to it and want to share that internet connection with all devices connected to the ...
0
votes
0answers
9 views

Displaying specific information from Raspberry Pi to a bluetooth display

I have a project on Raspberry Pi and I want to display angle variation recorded from sensors connected to RPi but the display must be connected via Bluetooth. Is this possible?
-1
votes
1answer
44 views

USB Wifi driver installation Error: /lib/modules/4.14.98+/build: No such file or directory. Stop

i need to install the USB wife EDUP into my raspberry zero, so i try installing the CD container driver which is similar to main GitHub container _RTL8188C_8192C_USB_linux_v4.0.2_9000.20130911_ ...
0
votes
1answer
32 views

Kernel panic - not syncing - What are some hypothesis for the root cause?

Kernel: Linux 4.19.42+ #1219 Tue May 14 21:16:38 BST 2019 armv6l GNU/Linux Hardware: Rasppery Pi Zero W cat /etc/issue Raspbian GNU/Linux 9 Kernel panics happen after a day of running with no issues....
1
vote
1answer
39 views

What to look for in a Large Touchscreen [closed]

I am making a kiosk application and need a large touchscreen monitor for the same. I am looking for large touch screen display(24inch-27inch) which can work with raspberry pi 3 B+ and RPi zero with ...
1
vote
1answer
37 views

Speed up SPI transfer

So I need to transfer a byte on the spi interface on raspberry pi. Here's my code in python import spidev import time import binimp fhandle=open("white.txt") initial=binimp.extract(fhandle,'192','...
1
vote
0answers
39 views

LIRC receiver problem after kernel update

I recently updated my raspberry pi 3 using sudo apt update && sudo apt upgrade . During the process rpi kernel got updated. uname -a Linux raspberrypi 4.19.42-v7+ #1219 SMP Tue May 14 21:20:...
1
vote
1answer
59 views

How to read ADC with low restance range

Does anyone have any ideas on how I can use RPI with ADC to measure a tank level sensor which has a range of only 20 to 200 ohm.
0
votes
0answers
20 views

RaspberryPi 3 B+: Error in running two webcams simultaneously

I purchased two webcams (Logitech C310 HD Webcam) to use with RaspberryPi (RPi 3 B+ model). When I run individual cameras, they are running fine but when I tried to run both cameras at the same time ...
1
vote
0answers
17 views

Broken eth0 (not about strange name)

Well, when I got my RPi3B+ all was gud as it should be(probably). But now my Ethernet port just don't work. Many distros just don't shows eth0 (or neb24dfaw or how it...) (like with ifconfig -a) and "...
1
vote
0answers
12 views

Writing to a sensor register using i2c bitbanging library not working - PiGPIO library on Raspberry Pi

I am trying to configure a sensor connected to Rpi over an i2c bus. I am using PiGPIO library with Python to do this. To configure the sensor, I need to write a certain value to some registers and ...
-2
votes
1answer
38 views

Serial to telnet - in reverse

Most people want to telnet into a Raspberry pi and use the serial ports to connect to something else. They want the Raspberry to be the telnet server. But I want the Raspberry pi to be a telnet ...
0
votes
1answer
24 views

Pi 3 B+ sudden audio failure

A few months ago I bought a RasPi 3 B+ to act as an overglorified doorbell using reed switches to tell the Pi to play a custom MP3 with the "Playsound" Module into the Company's PA system. It worked ...
0
votes
0answers
21 views

RTL wifi dongle does not create an interface at startup and doesnt connect

I have a Raspberry pi 3 with Raspbian GNU/Linux 9.9 (stretch) and I am trying to use a USB Wifi dongle (Realtek Semiconductor Corp. RTL8188SU 802.11n WLAN Adapter). The external wlan adapter has an ...
0
votes
0answers
32 views

Barcode decoding with pyzbar on raspberry pi

I am using pyzbar to decode barcodes on Raspberry Pi 3 using Pi Camera v1 (resolution 1296x972). Qr codes are decoded very well. When decoding two dimensional barcodes (CODABAR), the success rate is ...
0
votes
0answers
19 views

How do I change my Pi's bluetooth profile for it to show up as a bluetooth device not an audio device?

I want to give the pi a profile such that I can send and receive messages from it. However, in the list of bluetooth devices, it is showing up as an media device.
-1
votes
0answers
16 views

Access Wordpress admin-panel of raspberry pi from another local computer [closed]

Set up my raspberry pi today and connected to my network via WIFI, then followed this guide Build a LAMP Web Server with Wordpress. I found the ip address of the raspberry pi using hostname -I, then ...
2
votes
1answer
26 views

Is CPU frequency scaling active?

We have Raspberry PI 3B+ with Pi Touch Display and Pi camera. Today, we measured power consumption and this setup takes around 1 A with Xorg+our app and around 900 mA when Xorg is stopped and only ...
0
votes
0answers
20 views

Is it possible to gradually save data while recording. In order not to lose them in case of power failure?

I use the ffmpeg library to record audio and video. If a power failure occurs, the video file becomes 0 bytes. How can I record, so as not to lose data? my ffmpeg configuration ffmpeg \ -hide_banner ...
-2
votes
0answers
25 views

Showing the ssh terminal output in lcd connected to raspberry zero

I need to build native qt v5 and install it on my raspberry pi zero, connected via USB OTG connection to my Linux PC shown below: based of these instructions: https://www.tal.org/tutorials/building-...
1
vote
1answer
34 views

Raspberry Pi 3 B+ was connected to NRF24L01 in the following manner as in diagram but Raspberry pie not working after that why? [duplicate]

I connected VCC to 3.3V and GND to 5V of raspberry pie mistakenly. Now raspberry is only showing red light on and no green light blinking. What might be the probable reason. Is there any solution so ...
0
votes
1answer
15 views

Installing openssl 1.0.2g on jessie

I need to use libssl-dev 1.0.2g to compile some old codes. I followed the guides in stackoverflow but it does not work in my case. This is my /etc/apt/sourcelist deb http://mirrordirector.raspbian....
0
votes
1answer
38 views

Running subprocess in a service not working?

I have made a systemd service in Raspberry Pi with Jessy OS and it is given by. /etc/systemd/system/caportal.service [Unit] Description=captive portal automation [Service] Type=simple ExecStart=/...
1
vote
1answer
16 views

Plex video problems on updated Chromium

I have a Noobs RPi 3 connected to my TV. After a recent apt-get upgrade, Chromium is no longer displaying video from my Plex server correctly (it was working fine before the upgrade). I get the audio,...
1
vote
1answer
24 views

Networking restart not working?

In My raspberry Pi wifi is connected to my home wifi and eth0 is assigned with a static ip address. It act as a router between wlan0 and eth0. Raspberry pi get internet through the wifi. After ...
0
votes
0answers
16 views

Which screen size in Pygame for an 3.5 inch LCD?

i try to fill out my whole LCD screen in Pygame with the best sharp resolution possible. So there is a difference between computer screen and the LCD. My LCD has resolution is 480×320. So choosing ...

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