All Questions

0
votes
0answers
2 views

picamera how to detect darkness

I'm trying to detect the darkness using picamera. I guess I have to capture an image and elaborate it pixel by pixel getting the brightness or color value and if it is beyond a threshold that I ...
3
votes
1answer
8 views

Pi 4 I/O interface options… and where to find them

The BCM2711's hardware documentation lists multiple I/O interface options. Among others these are: up to 6 × I2C, up to 6 × UART (muxed with I2C), up to 6 × SPI (only five exposed on Raspberry Pi ...
0
votes
0answers
9 views

Interrupt issue - Wiringpi and pigpio show different values for pin

I am having an issue with raspberryio/wiringpi interrupts. A lot of extra interrupts are generated. My configuration is as follows: Physical pin 16: Set as input Pulldown resistor Interrupt ...
0
votes
1answer
11 views

What is the configuration of the 4-pole A/V jack on the Pi 4?

What is the configuration of the combined analogue audio and composite video 3.5mm jack on a Raspberry Pi 4?
0
votes
0answers
7 views

RPi Quadcopter under RISC OS

it is well known that the pi is in recommended for the quadcopter as raspbian is not a real time operating system the question is, will using RISC OS offer any advantage over raspbian, and make the ...
1
vote
0answers
10 views

6 Stepper Motors at 3000 Steps Per Second

I am planning on purchasing 6 stepper motors that I will need to operate at roughly 3000 steps per second each with DRV8825 stepper drivers. I was wondering if the Raspberry Pi 3B+ has the speed to ...
2
votes
1answer
31 views

Can the Raspberry Pi 4 better distribute Python scripts to all four cores?

This relates to previous questions regarding the GIL (Global Interpreter Lock) for Python on the Raspberry Pi. My question has to do with the new processor on the Pi 4 - does it still have the same ...
0
votes
0answers
14 views

Sending data between PC and Raspberry Pi

I have been trying to send data from my Windows PC to my Raspberry Pi 3 for a python controlled speaker project. I am using TCP sockets which I don't know much about. Client code (PC): import ...
0
votes
0answers
6 views

If I get Anaconda for Raspbian, how will it affect the existing Python installations?

In Raspian, I got Python 2(IDLE) and Python 3(IDLE) already installed. I'm more used to working with Anaconda with all its included packages. I'm just not clear if I install Anaconda, will I get an ...
0
votes
0answers
6 views

Ubuntu Server 18.04 on Raspberry Pi B + / Resolution Problem

Does anyone have a solution to a Resolution problem with Raspberry Pi B + running Ubuntu Server 18.04? It is connected to Samsung TV via HDMI and text is cut off (Spilling off screen). It is unusable ...
0
votes
2answers
21 views

How do I download raspberry pi updates to a linux server [on hold]

Relativity new to Raspberry Pi and Linux in general, but essentially I'm trying to create an update repository for my Raspberry Pis via a separate Linux server, how would I go about doing this? On the ...
0
votes
0answers
17 views

Raspberry Pi Laptop Requirements [on hold]

I'm currently on a project using a Raspberry Pi. I'm trying to create a laptop complete with a display, mouse, USB slots, etc. Will a Raspberry Pi 3 Model B+ with 1 GB RAM be enough for this?
1
vote
0answers
31 views

Powwering Raspberry pi 3 with Li-ion battery

I use MT3608 boost converter in order to convert Li-ion voltage to 5V for RPI, but when I connect battery, RPI doesn't boot up. When I check output of MT3608 it is 5V but it can't tolerate peak ...
0
votes
0answers
44 views

Can Raspbery Pi 4 hardware decode 4k@60hz H.265 10bit video?

I have seen it has H.265 support, but not specifically for 10 bit. Can anyone confirm this?
2
votes
0answers
14 views

Raspberry PI Zero Qt GUI Animation too Slow rendering performance

I have using the Qt by cross compilation method by this site instruction by this configuration: ./configure -release -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=~/raspi/tools/...
1
vote
0answers
20 views

Using an additional WiFi dongle to create WAP and switch

I followed the answer to this question: Access point as WiFi router/repeater with additional WiFi-dongle To have my 3 B+ act as a WiFi hotspot where wlan1 connects to the internet (WAN) and the pi ...
2
votes
5answers
665 views

Using Raspberry Pi to flash its own SD card

I'm developing a Buildroot OS for the Raspberry Pi, and my workflow requires very frequent re-flashing of the SD card to test new iterations. The process of removing the SD card from the Pi, flashing ...
3
votes
1answer
22 views

Permanently set keyboard repeat rate on Raspberry Pi?

I cannot seem to set the keyboard repeat rate permanently no matter what. I don't like the default setting as it is way too slow. After setting the keyboard Character Repeat delay and interval via "...
1
vote
0answers
9 views

What is the exact configuration (e.g. MIMO configuration) of the 802.11ac of the Pi Model B?

The specs for the Pi 4 Model B say dual band 802.11ac but not the degree of MIMO, critical for performance. What is it. Is there provision to add external antennae?
1
vote
0answers
9 views

Which Raspbian package contains the cdio C++ bindings?

I can't find them in libcdio-dev, and a search for the most important header file, cdio.hpp, in the Debian package catalog gave no results. A libcdio++ package seems not to exist either. Doesthis ...
1
vote
0answers
37 views

Utilising a Raspberry Pi as a wireless access point and a webserver

I have followed the official Raspberry Pi documentation's guide to setting up my Raspberry Pi as a wireless access point, with a shared internet connection using the bridge functionality discussed at ...
-3
votes
0answers
14 views

Start program when a device connects to local wifi

I'm looking for a python program that could detect when device has connected to a local wifi and start a specific program. And would communicate via SMS with raspberry pi.
0
votes
1answer
32 views

Managing home lights - Controlling smart lights

My first project with my raspberry is how to control the home lights, all of them. What I want is to have the ability to turn on and off each individual light. I know using manual switches won't work, ...
0
votes
0answers
67 views

Raspberry Pi Model 4 - Which nonfree parts remain?

As the Raspberry Pi Model 4 was released today, I reckon it's time to update this question. I'm aware of the fact that a lot of effort was put into writing usable free software GPU drivers as stated ...
0
votes
0answers
9 views

Raspberry PI 3 with Funcube Dongle Pro+ SDR does not read the antenna

I am trying to configure my RPi3 into a small receiving ground station. I already have installed the gnuradio, gqrv, gpredict packages. The RPi is connected to an SDR dongle (Funcube Dongle Pro+) with ...
2
votes
1answer
113 views

RPI 4 - POE enabled but requires hat?

I'm confused about the marketing on the new RPI 4. Here in the tech specs it says "Power over Ethernet (PoE) enabled (requires separate PoE HAT)". What does it mean it's enabled, but it needs a ...
1
vote
0answers
20 views

Use OBDII over WiFi

I think i've tried everything at this point, and nothing seems to work. I'm using an ELM327 WiFi Dongle, connected it to the Pi, created a socat using: sudo socat pty,link=/dev/ttyUSB0,waitslave tcp:...
2
votes
1answer
187 views

Is Raspberry Pi 4 fast enough to watch online videos with 1080p?

The Pi 4 has a faster processor (1.5 GHz Quad-Core ARM-Cortex A72). I am wondering if it is now possible to watch HTML5 videos on a browser (for example YouTube) and with 1080p quality without lagging ...
14
votes
1answer
3k views

Does the Pi 4 resolve the Ethernet+USB bottleneck issue of past versions?

The Pi 3 (and previous models) had an issue of bottlenecked bandwidth when using Ethernet and USB simultaneously. Is this resolved in the Pi 4?
-2
votes
0answers
22 views

How to interfacing memory in bare metal program?

What need to implement to run this code correctly on Raspberry pi 3 using bare metal code? #include <stdlib.h> int main(void) { int size = 500*1024*1024; int pos = 200*1024*1024; unsigned ...
0
votes
0answers
16 views

How to connect wifi wlan1 and share it by wlan0

How to connect wifi wlan1 and share it by wlan0 I would like to use raspberry pi become hostpot wifi. connect wifi by wireless and share it not use ethernet or lan.
1
vote
0answers
21 views

2 Chromium windows

I am trying to open up 2 separate Chromium windows using /.config/lxsession/LXDE-pi/autostart. I am able to open both urls when adding two lines but they open in the same browser as two tabs. I would ...
0
votes
0answers
13 views

Raspberry Pi 3 Model B Hung / Frozen, Including Clock?

I just happened to check on a Raspberry Pi 3 Model B with Raspbian Jessie 4.9.35-v7+ this morning and found it unresponsive. IIRC, there is an LED that is normally on when the Pi is on, so I thought ...
0
votes
0answers
10 views

Trying to use pymodbus as a slave but getting error

I have been successful using modbus-tk with an off the shelf modbus master simulator. However, when the real master is wired in (an Automation Direct PLC), the master does not get any response from ...
1
vote
1answer
15 views

Timeout function for user input on 4x4 membrane keypad with pad4pi

I'm making a python script for a 4x4 keypad that's connected to a raspberry pi where the user enters a 4 pin code and the program tells the user whether or not it's correct. In order to take in the ...
2
votes
0answers
158 views

HEVC playback on RPi 4

Raspberry Pi 4 lists HEVC (H.265) video decoding up to 4K@60fps in the spec. I'd like to get some feedback from people who already had a chance to try it out. Is this hardware or software encoding? ...
1
vote
1answer
108 views

Raspberry Pi 4 with Anker PowerPort Speed 5

So I'm thinking of getting a Raspberry Pi 4 and I know they have raised the power requirements to 5v 3amps, rather than buying the offical power supply would using the two blue fast charge ports on my ...
0
votes
0answers
12 views

stop code via systemd vs termination

i have an 16*2 char LCD connected to PI ,a C++ code is written to display "Date/Time" on LCD. when i execute the compiled code on terminal using sudo ./LCD it stats showing Time and when i terminate ...
1
vote
2answers
32 views

Kiosk mode that can start porgamms/shell script .sh

I want to build a kisok mode much like in Windows where you can start Programms with .hta files. So is it possible to have a Kind of gui (with chromium I guess) that is able to start specific ...
2
votes
2answers
208 views

Finding or mounting boot partition to create /boot/ssh

To permanently enable ssh for a headless setup, my understanding is that the simplest method is to create an empty file /boot/ssh on the boot partition. However, when I write to a file using this ...
0
votes
1answer
26 views

How to restart setup wizard at first time startup?

I started up my raspberry pi, and accidentally pressed escape during new password creation. The startup wizard exited, and now I cant get back to the startup wizard. How do I restart the startup ...
2
votes
1answer
23 views

Any existing software which can safely update the Raspberry Pi with dual OS partitions?

We are using Raspberry Pis model 3B in some remote deployed products, each one is running a Raspbarian OS image. I'd like to investigate a software update scheme that would allow dual OS partitions, ...
0
votes
0answers
6 views

C920 cannot register after removing uv4l

I have a pi 3b+ running Raspbian stretch. c920 had been working out of box with the official v4l2 driver. I install UV4L to play with the webrtc features. But found some problems. So I did an apt ...
1
vote
1answer
27 views

Installing Raspbian without recommended Software from NOOBS

Is it possible to install Raspbian (without the Recommended software) from NOOBS? Last time I chose Raspbian from NOOBS installation menu it also included the recommended software (Mathematica, ...
1
vote
1answer
22 views

Sound jumping back and forth

So my issue is that whenever I play an mp3 from the pi the sound starts jumping back and forth. So the audio starts playing it jumps forwards 5 seconds and after a few seconds it jumps back to where ...
1
vote
0answers
23 views

Making Python3 default on command line

I have been trying to run the Jupyter notebook on my Pi but the Kernels will not install into Jupiter even though I downloaded them through the Pi's Software download window. A little bit stumped and ...
0
votes
0answers
8 views

Loading root file system from NFS

I managed to simulate a Cluster HAT like environment with a Linux machine. I launched rpiboot with the modified config.txt, cmdline.txt and initramfs (which is missing from the original setup but is ...
1
vote
0answers
12 views

About code of GPS Neo 6M with Raspberry Pi3

Firstly my GPS only blinks led upto 1hour only and thereafter no connection in day. Why it is so? Also my this code is not working (with LCD display). It shows syntax error as SerialException: ...
0
votes
0answers
15 views

How can I setup USB OTG with a Raspberry Pi Zero W and an iPad over USB-C using Arch Linux?

Arch Linux systemd-networkd I want my Raspberry Pi Zero W to show up as an ethernet device to my iPad. It is doable. It's been proven to work. The problem is in the details. After ensuring there is ...
1
vote
1answer
29 views

Open chromium on boot

I'm trying to open chromium when the Raspberry Pi 3B+ boots. I've found this post, but my raspberry doesn't seem to have the /home/pi/.config/lxsession folder. I tried creating the autostart file but ...

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