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35 views

wpa_supplicant instantly drops EAP connection citing “reason=2”

I'm trying to connect to an EAP network by configuring wpa_supplicant using a configuration that works for another Raspberry Pi connected to the same network. wlan0 connects then immediately ...
1
vote
1answer
15 views

Possible to measure time of HDMI output generation based on framebuffer copy?

As the title may not be fully clear, here's a complete description of the problem. I've written a small library for the linux framebuffer usingmmap and some (higher) drawing routines, effectlively ...
1
vote
2answers
54 views

Weird problem with Raspberry Pi falling over

So I've been trying to trouble-shoot this myself for weeks. I have a Pi3 (and a Pi4, though the 4 causes no issues). My Pi3 is fully up to date, on Raspbian Linux 4.19.81-v7+ This issue persisted ...
3
votes
3answers
84 views

GPIO vs I2C SMBUS2

This example scans for any I2C slave address current on the I2C bus. (I am using a RPi 3B+ with raspbian buster from september release) Script trial_smbus.py: from smbus2 import SMBus channel = 1 ...
0
votes
1answer
28 views

Directly accessing a drive used as a NAS drive by a raspberry

I successfully tried to add a NAS to my local network. I did this using a RaspberryPi 3, samba and a USB stick formatted in NTFS. My RPI use ntfs-3g driver for accessing the drive. My problem is that ...
3
votes
0answers
59 views

What can set the system clock?

I'm testing various clock sources on a Raspberrypi Zero W with Raspbian Buster Lite. After removing the fake hardware clock sudo apt remove --purge fake-hwclock and disabling ntp sudo timedatectl ...
0
votes
0answers
37 views

Auto detect for USB Device not working (Garmin Watch)

I would like my Raspberry Pi 3 to auto detect my Garmin watch USB device when connected it via USB to it. So I could copy the .fit files from the devices for subsequent processing. Currently I cannot ...
1
vote
2answers
34 views

DS18B20 Temperature Sensor's Power Supply and Rpi's Pull-Down-GPIO-Pin Sinking Current Requirements

I have a RPi zero W and am reading four ds18b20 temperature sensors (with a 10K ohm resistor between the data and vcc line). Now and then I keep getting "SensorNotReadyError" from the sensors. My ...
0
votes
0answers
15 views

Get data from sensor via Bluetooth

i´m trying something i haven´t seen anyone did before. I`m trying to get the data of some sensors via Bluetooth in order to generate a CSV file with this information given by some iHealth sensors. Can ...
3
votes
1answer
30 views

2 4g usb dongles connected to RPI to router

So i live in an area that doesn't have fiber but has decent 4G/LTE connection. The problem is we have one service with unlimited data between 11pm and 6pm the following day and another service thats ...
0
votes
1answer
21 views

Why isn't it possible to run a 32-bit kernel on QEMU's raspi3 machine?

I've been using QEMU for a few years now, and I know that when using raspi3 machine (in QEMU >= 3.x), you can't run a 32-bit kernel on it. You have to use raspi2 machine. However, Cortex-A53 is ...
2
votes
1answer
32 views

4 Displays with diffrent output using Raspberry Pis

Core Problem: I need 4 displays to show diffrent output (simple images) For this kind of "Video Wall" problem, most solutions recommend one RPi for each display/monitor in a master/slave ...
-1
votes
0answers
21 views

Unable to Boot Raspbian 8 after resizing Root Partition

After cloning my Raspbian 8 SD Card to a bigger one everything seemed to be running fine until I used GParted to resize my root partition and the extended partition containing it, the boot partition ...
1
vote
3answers
34 views

I'm able to connect when Raspberry is connected via cable, but not via Wifi

I downloaded 2019-09-26-raspbian-buster.img (3.7GB after extraction) then I used win32diskimager-1.0.0 to burn it on MicroSD card then on /boot/ I created ssh file wpa_supplicant.conf file with ...
-2
votes
0answers
54 views

Is there a fast media player for Raspberry Pi?

I'm using a Raspberry Pi 1 with Librelec to listen to music in my living room. Works fine, but I'm concerned about boot time, the system takes 56s to boot and this is 56s I have to wait before I can ...
0
votes
1answer
46 views

A problem with Raspberry Pi VPN Server

So recently I have setup my first VPN server with my Raspberry Pi 3 B+, using PiVPN, everything is fine until I have noticed that when I use Wifi, I can't connect to my VPN. But with 4G data, VPN is ...
-1
votes
0answers
18 views

Everytime I do the apt-get upgrade command my kali linux shell crashes and my os breaks

Mouse pointer just blinks forever on blank screen.
1
vote
1answer
74 views

Raspberry Pi 3 B+ (Buster) can't control Dynamixel AX-12A with Raspberry Pi 3 B+ (Buster) with half duplex communication

I have a project to make mobile robot with Dynamixel AX-12A as the wheel, so i changes the AX-12A to Wheel Mode with CM-530 and it works well. I follow the guide from http://www.oppedijk.com/robotics/...
0
votes
0answers
18 views

(Pi4) No Display when in OTG mode unless HDMI_safe=1

Im officially stumped. I have connected my Pi4 to my PC via USB to USB-C for OTG connection. Whenever I boot with the normal PSU to the USB-C port on the Pi4, everything boots correctly (display and ...
2
votes
3answers
40 views

How to know if time is synced?

I'm writing a software in C and it is running as a systemd service. I need the service to run after time has synced or alternatively, I need a way for my C program to identify if time has synced. I'm ...
2
votes
1answer
42 views

I2C works but gives wrong value

I have an RPi3b (Master) wired up to an MCU (Slave) communicating via I2C. I did have an RPi1b wired up and upon which I did my first development (cheaper to accidentally fry). Suddenly I'm getting a ...
0
votes
0answers
18 views

How to install LCD driver on pi4 with Ubuntu19.10?

I try the LCD driver in github: git clone https://github.com/goodtft/LCD-show.git cd LCD-show/ sudo bash ./LCD35-show output: dpkg: 依赖问题阻止了卸载 xserver-xorg-input-evdev 的操作: xserver-xorg-input-evdev-...
0
votes
2answers
51 views

Permission denied (publickey)

I changed the private key on my computer using ssh-keygen (I know... Why would anyone do this? A: I have no idea what I'm doing :#) and now every time I try to ssh into one of my raspberry pi's it ...
0
votes
2answers
124 views

How to install Java 12

I am trying to install java 12 on my pi. I can only use the terminal. Any Ideas what I have to do? it seems that java 12 isnt in the Repositorys. Thank you in advance
1
vote
1answer
67 views

Short and frequent freeze on Raspberry Pi 4 with Kali Linux 64bit

I installed Kali Linux RaspberryPi 2 (v1.2), 3 and 4 64-Bit on my Raspberry Pi 4 with 4Gb RAM. All is running very well but I frequently experience a freeze, about 10 seconds of total interruption of ...
1
vote
0answers
44 views

RPi 4 second HDMI port does not seem to support CEC

When using the cec-utils on a Pi-4 with 2 HDMI devices connected, the one connected to HDMI1 does not respond to commands or show up in a scan. Running cec-client -l only shows 1 device. Is there ...
0
votes
1answer
35 views

Using a Raspberry Pi to write an image to an SD Card

Hie I have an SD card Module and can access connect two SD cards to my raspberry pi, however i would like to be write an image in the other card connected to the SD Card Module
0
votes
1answer
48 views

Over WiFi, I can establish a SSH connection but there is no internet connection

As described in the title, I can connect to my raspberry, via SSH connection, but raspberry has no internet access. All of this is done through an WiFi connection (Windows PC <--> Router <--> ...
3
votes
3answers
441 views

Beyond breadboards? Good ways to package simple GPIO-using project?

I have a couple of simple projects that use a handful of GPIO pins, a few resistors, and some sensors and LEDs. What's a good way to package up stuff like that? Is there a premade solderable HAT-like ...
0
votes
0answers
22 views

Rainbow screen issue with raspberry pi 3 model b+

I am using Raspberry pi 3 Model B+ and using Ubuntu Mate operating system not Raspbian Os I am also using raspberry pi 3 supportable original charger of 5.1V 2.5A. still i am facing the same rainbow ...
0
votes
1answer
41 views

RPi4 - Using windows to create micro SD card copies - fail to boot?

I'm currently trying to use 'Minitool Partimage Image' on Windows 10 - this works with all standard hard drive duplication. After a lot of testing of various size microSD cards, why when you perform a ...
0
votes
0answers
20 views

Raspberry Pi Camera V2 resolution reduced

I am testing my Raspi Cam V2 on raspi model 4B running buster, I was able to get 1080p videos at 30fps and it supported the below formats $ ffmpeg -f v4l2 -list_formats all -i /dev/video0 [...
0
votes
0answers
23 views

VOIP phone dialer

What would the best way be to connect to my PBX or to dial a number to PBX? I'm really lost where to start. looking to use python3 with some softphone maybe
1
vote
1answer
20 views

Refreshing lxsession kodi-standalone exit

I'm having difficulties refreshing a screen after kodi-standalone exits. I have a stretch-lite RPI2 installation and starting kodi from command line (with LXDE xserver gui present) mrkipi@raspberrypi:...
0
votes
1answer
29 views

Is there a way i can view RPI screen to VNC on Raspbian lite

i have a problem where i need to view my running python GUI app (Kivy) to VNC. The app is running on the 7" RPI screen and i am using raspbian lite (no desktop), i used raspi-config to enable VNC but ...
0
votes
0answers
28 views

pi4 How can I get in normal mode from out safe mode

I was trying install KDE-PLASMA desktop and therefor I made a mistake with adding a different overlay and after that I get a blackscreen while booting. Now I am in safemode but what I really want is ...
0
votes
0answers
20 views

SIM800L - GAMMU not connecting - RPI 4

I connected my RPI4 & RPI3B one by one with my SIM800L board in hope to be able to receive sms on the board. Unfortunately, the boards do not detect the module. The SIM800l was given external ...
0
votes
0answers
32 views

How to create a person or head (not face) detection using open CV that are not too slow when run in Raspberry Pi 3B+?

Hello guys my problem is creating a program that can detect the head(not face) or human detection for my project One of the program that i see is too slow for raspberry pi 3B+ which is this : https:/...
1
vote
1answer
92 views

Reliable temperature/humidity logging with Python and a DHT11

There are more than 100 questions on this site concerning DHT11 or DHT22 sensors and I have used these with Python and c code using various libraries. None that I have tried seem to give reliable ...
0
votes
0answers
45 views

Raspberry Pi 3B+ successfully connect and pair but can't receive data from OBD II

Hello guys my problem is i cant recieve any data from OBD II to Raspberry Pi 3B+ Here the materials that i use: Raspberry pi 3B+ ELM327 -> OBD II Operating System of Raspberry Pi -> https://medium....
0
votes
0answers
12 views

Why does raspistill take 10× more real time than the shutter time I set?

I've installed the camera module v2.1, and now I'm trying to make long-exposure photos with it. I seem to get correct results, i.e. the image is bright enough corresponding to the large exposure time, ...
1
vote
2answers
37 views

wpa_supplicant.conf Changes Disappear

I'm trying to setup my wireless on a raspberry pi 4 running raspbian, and I'm making changes to the wpa_supplicant.conf file per other answers here on Stack Exchange. However, after I make the ...
1
vote
0answers
62 views

Pi 4 Will Not Boot with Noobs or Raspbian

I recently bought a Raspberry Pi 4, 4GB model, and I cannot get it to boot Noobs or Raspbian. When I purchased it, I knew I wanted to use it for a ubuntu distro, and it booted noobs, but I couldn't ...
0
votes
0answers
30 views

Nano Color Syntax for Python3

Currently if I use nano to edit a file with a .py extension nano will recognize it as a Python file and will color the syntax, but for Python 2. Is there anyway for nano to color syntax to Python3 ...
1
vote
1answer
37 views

How to install PIXEL on Ubuntu Server (64bit)

I got a Raspberry PI 4 running 64bit Ubuntu Server. Now I have a bash prompt want a desktop environment. Hopefully, the PIXEL desktop to minimize differences from stock Raspbian. A quick google ...
0
votes
0answers
51 views

Use a 2.5" LCD in a Blaupunkt Dashcam for Raspberry Pi?

and thank you for reading my topic. I recently bought a "2.5" LCD HD Dashcam" from the Blaupunkt brand (BPDV122), although I am aware they have just used this design from another company. https://www....
1
vote
1answer
57 views

Using EnOcean PI 868 with raspberry PI4

first of all: I'm new to raspberry I.ve just bought a raspberry PI 4 together with an EnOcean PI 868 module to set up a house automation system. To make it run I've tried the steps described on the ...
1
vote
2answers
116 views

python start on boot

i am trying to get my WS2812 NeoPixel python sketch to run at boot, i used a tutorial https://tutorials-raspberrypi.com/connect-control-raspberry-pi-ws2812-rgb-led-strips/ it install the correct files ...
1
vote
1answer
20 views

How do I reverse the loop?

I'm trying to do a KITT Led Scanner on the simulator at https://trinket.io/sense-hat. This is my code: from sense_hat import SenseHat import time s = SenseHat() R = (255,0,0) x = 0 y = 1 s.clear() ...
0
votes
0answers
27 views

monitor air quality

I would like to build a device to monitor few chemicals (CO, NH3, H2S) and particulate (PM2.5 and 10) in the air. I have been looking online for related sensors and I found that the MQ-X series (CO=...

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