All Questions

0
votes
0answers
9 views

specifying baud rate when using PyBluez Bluetooth library

I'm trying to establish Bluetooth connection for a hc-05 Bluetooth module. When using the "serial library" to setup the connections, you can specify the baud rate using "serial.Serial("*******", baud ...
-1
votes
1answer
50 views

Installing Raspbian from NOOBS without a keyboard, mouse and display

I have a RPI 0 W, a 8GB Micro sd card with NOOBS on it. I want to install the Raspbian on RPI 0 W. Is it possible to do so with the help of my laptop? If yes, how should I proceed? If not, what else ...
1
vote
1answer
27 views

Old code running on reboot

I have a headless pi3 running Android things. My app is an irrigation system. It's out in a greenhouse, so I connect to it via wifi. I have the app running by default on boot. I can change code, ...
0
votes
0answers
6 views

python - add overload __add__ to imported DotNet function

Let's say e.g. I have a dotnet module MyDotNet, containing a class 'Numbers'. The class Numbers has a function NumbersAdd to add two numbers. I use the dotnet module by use clr, with AddReference. ...
3
votes
2answers
84 views

Why is Raspberry Pi 3B / 3B+'s CPU temperature precision 0.538°C?

While monitoring CPU temperature from /sys/class/thermal/thermal_zone0/temp, I noticed that the minimal step is exactly 0.538°C. This is the same on both Pi 3 B and Pi 3 B+, and I suppose that it ...
0
votes
0answers
20 views

How to connect a pulse sensor to my Raspberry PI 2?

I have a pulse sensor looking like this, having three outputs: _____ / \ | <3 | \_____/ | | | I assume it is the same model like sold on pulsesensor.com, but I bought it from an ...
-1
votes
5answers
160 views
+50

Stream Raspberry Pi camera to Android/iOS over internet

Problem : I want make live stream from my camera attached to Raspberry pi 3 b+, which is connected to home WiFi. Streaming should be over internet. So that any client like Android/ iOS can stream it ...
0
votes
0answers
25 views

SD card copier fails. Backup hangs with “dphys-swapfile.service” message

I used the SD card copier program in the accessories menu. The SD cards are exactly the same brand and size. There were no errors during the backup process. When trying to boot from the backup SD ...
0
votes
2answers
29 views

How do I identify the boot time in the logs?

Sometimes when my headless Pi Zero W hangs or goes offline without coming back, I hard reset it by disconnecting the power cable and reconnecting it. I'm trying to look for clues in /var/log/syslog ...
0
votes
0answers
19 views

Corrupted MicroSD Card

Recently, I ran the command: startx After running that command, Raspbian didn't let me login. So I reset the OS using NOOBS. I remember running startx because I had to to use gparted or something. ...
0
votes
0answers
21 views

How to access Tx Rx of UART to TTL converter on RPi 3B?

I accessed the hardware by connecting it to GPIO pins (TX-RX) and wrote a code that that could send instructions to that hardware and receive outputs from it successfully. The first few lines of code ...
0
votes
1answer
30 views

How to copy file to USB Mounted on Pi from SSH Server

I am writing a python script that checks the files in a folder on my Android, and will copy .jpg files to a USB I have mounted on my RPi. (My Android is running as an SSH server). I am able to ...
1
vote
0answers
22 views

Are HATs not supposed to be stackable?

From reading the HAT spec, the ID EEPROM is fixed at address 0x50. This implies that only one real hat may be present at a time, yet lots of products are called HATs and say that they can be stacked, ...
1
vote
1answer
24 views

Qutebrowser/QTWebengine on Raspbian

I am trying to install qutebrowser on Raspbian. I have upgraded to testing because qutebrowser is not contained in the stable repository: # sed -i 's/stretch/buster/' /etc/apt/sources.list # sed -i '...
0
votes
1answer
64 views

what's the best os for the first gen 256mb pi? [on hold]

what's the best os for the first gen 256mb pi? i have one laying about and raspbian is using to much ram any ideas?
0
votes
0answers
14 views

PyGame GUI hidden by program

I am working on creating a graphical program to display two lines of text (a big message and a small message) on my Raspberry Pi Touchscreen using the module pygame. In the basic terminal, I can pass ...
1
vote
1answer
34 views

Segmentation fault when sudo su or other sudo commands

I wanted to update my SSL certs on my Pi 3B+ which is running NextcloudPi. I did not touch the Raspbian System on it for at least 2 months. I am the only one who is able to login. I connect via SSH ...
0
votes
1answer
15 views

Software adjustment of gamma/brightness settings in Raspbian

I am trying to find a way to control the apparent brightness of my external screen on Raspbian Stretch. In my situation, there is no need to actually control the backlight, as I only want to change ...
3
votes
1answer
41 views

Using RTC on Raspberry Pi Zero while SDA/SCL pins are occupied

I have a portable project on my Raspberry Pi Zero and I am using a i2c 0.96" OLED on the SDA/SCL pins on my Raspberry Pi. I would like to add a RTC Module to my project, but all of the tutorials I ...
1
vote
1answer
34 views

Upgrading the kernel fails

I currently have kernel version: 4.14.79-v7+ (and I am using Raspbian Stretch) pi@pi:~ $ uname -a Linux pi 4.14.79-v7+ #1159 SMP Sun Nov 4 17:50:20 GMT 2018 armv7l GNU/Linux When I try to update and ...
-1
votes
0answers
15 views

Error during onoff installation

I run the sudo npm install onoff -g command and this error was displayed NOTE: I'm following the tutorial from blynk's own site
2
votes
1answer
19 views

Multiple /media/user/SETTINGS* directories yet only one partition

I am running Raspbian Stretch on a Pi 3 B+. One thing I noticed is that I have more /media/user/SETTINGS* than actual partitions. See, I have 3 directories: $ ls -la total 17 drwxr-x---+ 5 root root ...
0
votes
2answers
33 views

Wireless communication for RC project

I'm planning to build a remote controlled car based on either a Raspberry Pi 3 or a Raspberry Pi Zero (the one with bluetooth and WiFi). Currently I'm struggeling with how to communicate with the Pi. ...
0
votes
1answer
25 views

RASPBERRY PI 3 B+ internet access problem

A static Ip has been given for my raspberry pi from my company. That means if a connected to my office wifi network in anytime, the ip is 172.16.100.13 I have not changed anything in my Pi. Any ...
0
votes
1answer
28 views

Illegal instruction when trying to update package on Raspbian-Lite

On Raspbian Lite I'm trying to run apt-get upgrade but running into following issue: Setting up libssl1.0.2:armhf (1.0.2r-1~deb9u1) ... dpkg: error processing package libssl1.0.2:armhf (--configure): ...
1
vote
1answer
45 views

Raspberry pi3 model B+ connect to wifi but no internet

I have connected my raspberry pi 3 (running Raspbian) to my company's wifi network. It has connected to wifi, but there is no internet access. I cannot ping also. I did following modification in my /...
0
votes
0answers
12 views

OpenCV 3.3.0 issue

Hey when i am running code i got this annoying error #!/usr/bin/env python import numpy as np import cv2 as cv import os from pantilthat import * os.system('sudo modprobe bcm2835-v4l2') cascade = ...
1
vote
1answer
56 views

Ultrasonic sensor stops working a few minutes later

I want to get distance continuously using while loop but a few minutes later my code suddenly stops working and doesn't get distance (there is None value in distance variable) I have changed first ...
0
votes
0answers
27 views

Connectivity to internet with two WiFi adaptors

I am using Rasberry Pi with Kali Linux. I have two WiFi adapter one (internal). I am using for headless mode connection to my phone and other (external). I am using for connectivity to internet to ...
0
votes
1answer
25 views

PyQt5 not found by Python3.7

I installed Python 3.7 on my raspberry pi with the help of Installing Python 3.7.0 on Raspbian tutorial and wanted to use it to start my script which uses PyQt5 but its throwing a ModuleNotFoundError. ...
1
vote
0answers
19 views

EDID problem with different monitors

I've got 2 monitors I use with a pi. The HP monitor self identifies root@raspberrypi:/home/pi# tvservice -n device_name=HWP-HP_L1755 & it is happy with the preferred hdmi settings root@...
0
votes
1answer
21 views

I2C slave on a RPi Model B with pigpio?

I want to use the I2C slave provided by pigpio with a Raspberry Model B. pigpio documentation says GPIO 18 and 19 are used for that. Unfortunately there is no GPIO 19 on an RPi1. Is it possible to ...
1
vote
1answer
30 views

FFMPEG Raspivid Videos are shorter than they are supposed to be

I am recording and piping my video with the following command : raspivid -w 1920 -h 1080 -fps 25 -b 7000000 -o - -t 0 | ffmpeg -re -f h264 -framerate 25 -i - -vcodec copy -y -r 25 -strict ...
0
votes
1answer
35 views

Saving image/GIF using a GPIO button

I'm running tv.giphy.com on my RPi, which shows random (or not) GIFs in full screen mode. I run the website in Cromium's kiosk mode. I have a PiTFT with 4 incorporated buttons and I would like to use ...
0
votes
1answer
33 views

5 volt GPIO pins on RPi not working?

So, today I made a simple LED circuit with a 5 volt pin on my Pi and it doesn't work. I tried the 3 volt ones and they work, but every 5 volt pin fails to work. The circuit just consists of a red Led,...
0
votes
0answers
26 views

Pi 3 Model B+ can't boot after changing vRAM

I just got the device (Pi 3 Model B+) and am a total beginner. I'm using NOOB/Raspbian. Every time I try to change the video ram (either through the GUI or the config.txt) the device is unable to ...
1
vote
0answers
26 views

Streaming High Quality Raspi Video To Windows Pc on Same Network

So I am currently building a robot that requires me to have a low latency (>.25s) decently high quality (~720p ~20fps) live video feed that I can stream to a windows pc on the same network. The pc ...
2
votes
0answers
26 views

Failing using startx to launch different desktops

I am trying to use startx to launch different desktops according to an argument using case...esac This is my .xinitrc mate(){ (sleep 5 && conky) & mate-session } case $1 in ...
1
vote
0answers
24 views

FFC 12 pin cable with a USB interface

I have this barcode scanner module and I need to connect it to my raspberry pi 3 b+. I am a beginner at this and I don't know how to go about it. I have been searching for weeks. The seller in ...
0
votes
0answers
26 views

433Mhz sniffer not working with dog collar

I have problem with Sniffing RF on 433Mhz with my Raspberry Pi Zero W. I have this : Transmitter + receiver (https://arduino-shop.eu/arduino-platform/1003-arduino-433-mhz-transmitter-receiver.html) ...
1
vote
1answer
24 views

Mirror Windows Screen to RPi 3B+

i want to mirror my Windows 10 Desktop to my Raspberry Pi. If possible real time but a little delay is alright. I want to be able to watch Netflix on it but i dont want to install Kodi or any other ...
1
vote
0answers
18 views

www-data can't access external drive

On Pi3 with Stretch, apache is calling an wsgi script that should access a file on an external drive. Here's the apache error log: mod_wsgi (pid=7963): Failed to exec Python script file '/usr/share/...
0
votes
1answer
16 views

How to setup an acces point on 8812au driver using systemd networking?

I've been using this guide I've setup a Raspberry Pi 3+ which has a WiFi dongle and onboard WiFi to do this. The WiFi dongle is an AC600 with the 8812au chipset, requiring compiled kernel drivers, ...
0
votes
0answers
35 views

Read real-time data in node from neo-6m gps module in Raspberry pi 3 plus

I am using something like this in node js. And I am getting the correct lat lon details, so I am sure that gps device is connected properly to raspberry pi. const SerialPort = require("serialport"); ...
0
votes
1answer
20 views

Not able to compile the u-boot 2017.09

This is the OS info that I am using in my pi3 (BCM 2837) board. pi@raspberrypi:~ $ uname -a Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux [ am I using the ...
0
votes
1answer
22 views

Problem with auto pair a Bluetooth device

https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/simple-agent I tried the Above Python script but getting a dialogue box 'Pairing Requested'. How to remove that dialogue box?
-2
votes
0answers
27 views

How to implement the node-red dashboard into Android app without browser help?

I am working on a project with devices are connected to the local network and I am going to control them using MQTT protocol with raspberry pi. I am using node-red to implement MQTT and connect to the ...
1
vote
1answer
16 views

update-command-not-found gives « KeyError: 'rpi' » after upgrading to Rapsbian Buster (testing)

I just updated my Raspbian to Buster (testing) by editing /etc/apt/sources.list and replacing all stretch with buster and doing apt update && apt dist-upgrade. Now apt update always shows an ...
-4
votes
0answers
31 views

PI running out of memory

when I am using webcam, after some time my PI running out of memory and i am not able to clear ****/var/lib/motion**** folder. Can anyone please help me
0
votes
0answers
20 views

Problem with aplay: “set_params:1363: Unable to install hw params”

I have been successfully using the command aplay -D bluealsa:HCI=hci0,DEV=EB:06:BF:19:C2:D3,PROFILE=a2dp Open.wav to play sound over a BlueTooth device. HOWEVER after a few hours of trouble free ...

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