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Raspbian-Stretch is a GNU/Linux operating system derived from Debian 9. Initially released in August 2017. Raspbian is the most widely used Pi based distro and the one recommended by the Raspberry Pi Foundation, who distribute their own images of it in two flavours, a full version with Desktop GUI, ...

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Can't achieve to output the sound to the Jack

I've got a Pi 3 B+, I wanted to send the sound output to the jack. My system is Raspbian GNU/Linux 9. To test the audio I do speaker-test -t sine -f 440 -c 2 That works fine, I hear the sound on ...
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11 views

How to speed up SPI chip select transition using “spidev”?

I successfully drive a DAC via SPI using the spidev native SPI driver using a RaspberryPi3. The core portion of my code is as follows: fd = open("/dev/spidev0.0", O_RDWR); txarr[0]=0xAA; txarr[1]=...
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1answer
8 views

xrdp Requiring Numeric IP Address from Windows

I have xrdp installed and running on a Raspberry Pi 3B+ running stretch. The Pi's name and address, from the /etc/hosts file, are: 10.0.0.5 mycroft When I try to access the Pi from Windows 10 via ...
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25 views

Raspbian access point not working

I have followed the guidance in https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md however no wireless network can be seen on any other devices and I now have no ...
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1answer
30 views

Lan and Wifi interfaces behave strangely when trying to set a static IP

I'm using an RPI3B+ to learn about dhcp servers. I've hit a snag I can't figure out. Please bear with me. I want to explain what's happening in detail so you can understand it better. I booted my pi ...
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64 views

hostapd service not starting

I am trying to build a hotspot around raspberry pi with the Quectel 4G LTE Module and base shield. Whenever the RPi boots up the udhcpd service status keeps as running but however hostapd service ...
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24 views

Raspberry 3 stretch double static IP configuration

I'm trying to configure my Raspberry Pi 3B Stretch to have 2 different IP's on /etc/dhcpcd.conf In my case, I work on two different places : my home and my school and I wanna have my pi automatically ...
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31 views

Symbol lookup error when launching protoc

I am trying to build TensorFlow for Raspberry Pi (running Raspbian GNU/Linux 9 stretch) following the instructions at https://github.com/tensorflow/tensorflow/tree/master/tensorflow/contrib/makefile ...
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22 views

Remove ROS Indigo from Raspbian

I followed this tut. to install Raspbian Indigo but I can't find any instruction on how to remove it completely, since I want to install the new Kinetic distro. Is it enough to remove the /opt/ros/ ...
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2answers
24 views

Running MagicMirror via HDMI but controlling it via extended virtual desktop

Total linux noob here and at this point without some of the required HW to actually try this out but; I'm meaning to use my raspberry pi 3b (raspbian stretch) as somewhat of a home automation center ...
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20 views

Mount network drive with fstab, permission denied

I am trying to mount a network drive with mount -a and have added the string below to /etc/fstab. When running the command mount -a it shows the error message below. //server/folder /mnt/folder cifs ...
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2answers
41 views

How to stop python script that was started with crontab reboot

I have a python script that continuously saves data to a CSV file and is started as soon as the Pi starts up using crontab reboot. Does anyone know how I stop the script from within the Raspberry Pi ...
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13 views

Recording Video at boot up but not saving it

I am working on a project which a part of which is to capture a 5 second video in .h264 format and then convert it to .mp4 (I'm using subprocess for that). I have coded to see the preview of the video ...
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0answers
23 views

Run Python code from PHP

This is probably a Linux question, but concerns specific Pi code. I am using the DHT11 class from http://abyz.me.uk/rpi/pigpio/download.html and have written a program which uses this. #!/usr/bin/env ...
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14 views

my 3.5" touch screen inverts the input of the touch

when ever i touch the top right of the screen and move to the bottom right the mouse moves from the top left to the top right i've already tried "display_rotate=2" and "lcd_rotate=2" but nothing ...
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2answers
82 views

Unable to SSH after securing Pi

The questions I have found so far do not seem to satisfy my problem (e.g. I've tried the steps in them to no avail). I'm in the process of securing a Raspberry Pi, following this guide: https://...
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1answer
26 views

LLMP server tutorial

I have searched Google for an answer but cant find an up to date tutorial for creating a LLMP server (Lighttpd instead of Apache). I find one follow it and think I'm getting somewhere and its a year ...
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1answer
44 views

Execute service or script via hotkey

I use Raspbian lite. I'm trying to map a hotkey to start the service or a script. I do not use a graphical user interface, only a text console with a local attached display. I'm not using ssh. I ...
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1answer
22 views

Rasbian Stretch monodevelop does not start anymore

After the upgrade monodevelop 7.6.0 crashes with unhandled exception. My mono apps which used to work crash as well. They work on other distros with the same mono version. Any known solution?
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18 views

Modifying wireless driver to include the number of re-transmission in RPI3

I was working with RPI3, where I need to get the number of retransmission in the IEEE802.11 layer in case of worse wireless channel condition. I was looking in /sys/class/net/wlan0/statistics to find ...
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1answer
26 views

How to dynamically determine objects based on some uniqueness?

As the title states I looking for a way to (detect and then) determine a object within some range. The object will be forklift or "train" in the factory. Main goal is to provide some GUI from which it'...
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64 views

No window manager for VNC connection

I have a Raspberry Pi 3 Model B+, with an SD card on which I installed Raspbian Stretch (not lite!) 2018-10-09. This is what I did so far to try to get it running: initially I connected a 2 Amp power ...
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0answers
66 views

Open port 8080 on Pi for viewing on iMac

I am a beginner, I have a little knowledge of computers and know absolutely nothing about Linux or it's offspring like Raspbian etc. I copy and paste when installing software. My main interest is ...
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24 views

Raspbian Stretch Lite Access internet from Ethernet

Previously on Raspbian OS, I used to access the internet from my Raspberry Pi by connecting it via Ethernet to my laptop. My laptop is running windows 10 and has the WiFi network's internet is shared. ...
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1answer
28 views

How to change keyboard without using raspi-config?

I have HypriotOS running which is a Raspbian Stretch version uname -a Linux test 4.14.34-hypriotos+ #2 Sun APr 22 15:29:32 UTC 2018 armv61 GNU/Linux lsb_release No LSB modules are available. ...
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1answer
41 views

Schedule a cron job to send temperature via e-mail

Greeting's, I am running an apache2 server on my raspberry pi. I wanted to keep a tab on it's temperature while I'm travelling. I know that following two commands will give me the GPU and CPU ...
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31 views

Counting the number of re-transmission for a single UDP packet transmission in IEEE 802.11

I was working with a client-server project based on UDP and 802.11 as a link and physical layer. There, the client was trying to probe some packets in the wireless channel to gauge channel condition. ...
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0answers
32 views

RTC DS3231 gets old shutdown time on boot

I have a DS3231 RTC chip on my Raspberry Pi 3 B+, running Raspbian Stretch kernel 4.14.69-v7+. I have enabled I2C, and added dtoverlay=i2c-rtc,ds3231 to /boot/config.txt. I could read the original ...
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14 views

mjpeg (using motion + rasp pi + Chrome browser) works on wifi, but not when wifi can't be reached and switches to cellular

I am running motion on my rasp pi. All works well when i can reach the web page with the img tag from wifi (either my local address or via port forwarding of 8081). However, when wifi connectivity ...
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1answer
31 views

raspbian-lite stretch mariadb very slow on restore

A small (18k) mariadb database restore on a new install of raspbian-lite stretch runs extremely slowly (taking more than a minute to complete). sudo apt-get install mysql-server or sudo apt-get ...
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16 views

WiFi setup with BT Home Hub 5?

This should be a simple WiFi setup but is proving frustratingly difficult: Raspberry Pi 3 with Raspberian OS version 9 BT Home Hub type A Having tried various combinations of editing settings files ...
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1answer
30 views

Connecting to mobile network on startup using ppp0

I have a sixfab 4G LTE shield and the module through which I connect my RPi to cellular data. It requires few commands to be executed in order to connect. How do I make it run only once post startup ...
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51 views

Slow Chromium on Raspberry Pi 3B+ after update from Jessie to Stretch

I've been looking into my problem for days now and I didn't find a solution to it. If there is already a question about this issue, I have not found it, my apologies. Please direct me to it if there ...
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1answer
20 views

Set MAC address in Raspbian Stretch [duplicate]

Prior to raspbian stretch, the best way to configure an ethernet interface MAC address was within /etc/network/interfaces, adding the line hwaddress ether 00:e0:4c:53:44:50. At the moment I am having ...
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8 views

E3372h-153 Using the SDCARD - PI ZERO - RASPBIAN STRETCH LITE

So first ever question here, please excuse me if this has been asked/answered already, but i've searched all over to try and find an answer and have come up short... I have have a Pi Zero, with a ...
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37 views

How to output VLC Video to HDMI without X Windowing system

I am trying to get VLC to play video from the command line and output both video and the audio to HDMI. This works with omxplayer, but I need to have the media player to be controlled remotely via ...
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1answer
79 views

Workon Command not found when using pi, but works from ssh

when I run the work command to get into my cv virtual environment on my pi it displays pi@raspberrypi:~ $ workon cv bash: workon: command not found however when I ssh into my pi from my MacBook and ...
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15 views

Problems with image quality and pixel artifacts on HDMI screen

I have a 4" IPS 480x800 screen connected to a Raspberry Pi 3B+ running Stretch via HDMI. However I'm seeing some amount of pixel distortion and artifacts particularly around edges . I have attached a ...
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1answer
49 views

Running a Python Telegram bot at startup and 24/7

I would like to use my Raspberrry Pi (Raspbian Stretch) for running a Telegram bot. I already wrote the script and it works perfectly, when run in the 'Thonny Python IDE', because there it doesn't ...
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0answers
157 views

What causes error “Could not communicate with wpa_supplicant”?

When running Rasbian Stretch and trying to configure the WiFi via raspi-config, I get the error "Could not communicate with wpa_supplicant". I've seen a number of posts that mention this error, but I ...
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3answers
40 views

Boot: multi-user.target starting late

My Raspberry Pi Zero running Raspbian Stretch Lite (2018-10-09) seems to be slow at boot. First off, the state of the OS: It is basically a freshly installed image on a properly working Class 10 SD ...
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0answers
16 views

Is there a way to change the pmount mount point?

Based on this answer for automounting USB... Running Stretch Lite on a Pi3, running Openbox window manager, no desktop or session manager. Is there a way to change the name of the mount point created ...
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1answer
25 views

Cannot find `hw ether` to force MAC address change

This is a follow up question to this post and subsequently this post. To save you from a long read I am trying to force a MAC address change on my Pi Zero ethernet adapter with: ifconfig eth0 down;...
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2answers
146 views

Failed to create symbolic link?

I'm trying to symlink file /etc/systemd/network/00-default.link to /boot/00-default.link. This allows me to force a change to my MAC address from the boot directory, which is the only directory ...
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0answers
28 views

Error while upgrading about python unicornhat

I am having a problem while trying to upgrade my Raspberry Pi. It was a simple routine upgrade. I did update before upgrading. However, there seems to be an error while upgrading. The error is a ...
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0answers
54 views

Setting up Bluetooth to Act as a Headset

Background: I'm working on a project to connect a Motorola XPR 7550e to a Raspberry Pi B3+ via Bluetooth. The idea behind it, is to run a NodeJS application that listens to the radio and transmits it ...
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28 views

How to VNC into a chrooted user?

Hello guys I'm making a exploration robot with a RPi 3 model B and Raspbian Stretch OS and I want users to log into the DE and via SFTP (in case someone wants to download a video of the exploration), ...
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1answer
64 views

Mono for Raspberry Pi Zero

I am trying to run a simple "Hello, World" C# app on my Raspberry Pi Zero. It works fine on my Raspberry Pi B+, but I get an "illegal instruction" error on the Zero. In both cases, I am compiling ...
2
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1answer
92 views

Why isn't my forced MAC address change working?

I'm working with Raspberry Pi Zeros on a subnet. I bought external Ethernet adapters for each one to connect them to one another. Unfortunately, these ethernet adapters all came with the exact same ...
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0answers
51 views

Why does my SSH connection only work sometimes, both when connecting and sending?

I have a Raspberry Pi Rev 3 Model B. I have used Tera Term's SSH to connect to my Pi many times in the past, although when I tried to connect yesterday it was the first time I had tried in about a ...