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Questions tagged [raspberry-pi3]

GENERAL RPI QUESTIONS ARE OFF-TOPIC. General questions may be asked on https://raspberrypi.stackexchange.com Use the tag for questions that apply specifically to the Raspberry Pi Model 3, NOT other models.

RPI QUESTIONS MUST BE PROGRAMMING RELATED. Raspberry Pi 3 with BCM2837 1.2 GHz 64-bit quad processor based on the ARMv8 Cortex A53, with builtin Wi-Fi BCM43438 802.11n 2.4 GHz and Bluetooth 4.1 Low Energy (BLE).

Raspberry Pi 3 model B layout (top)

This tag is intended for questions that are applicable to the Raspberry Pi Model 3B ONLY rather than other Raspberry Pi models.

See the related StackExchange site at https://raspberrypi.stackexchange.com. Also see the first edition's tag at https://stackoverflow.com/questions/tagged/raspberry-pi.

Useful links:

Official description

Official downloads

GPIO interactive pinout

If the question is not programming related then it may be on-topic at Raspberry Pi Stack Exchange, Internet of Things Stack Exchange or Unix & Linux Stack Exchange.

4094 questions
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Implementing a system call for CPU hotplug on RPI3/ModelB

My goal is to implement a system call in linux kernel that enables/disables a CPU core. First, I implemented a system call that disbales CPU3 in a 4-core system. The system call code is as follows: #include #include…
A.Chaalane
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Required library at /natives/linux-arm/libconnect.so

I'm working on my own Discord-Bot using java. I added the feature to use it as a Music-Bot. Now i wanted to add an Volume command. I added the command in my program. Everything worked fine on my Microsoft Windows computer. I copied the bot to my…
Seuma
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Errors with raspberry pi 3 - Qt 5.9 eglfs

I have compiled the latest version of qt from git 5.9.2 with latest raspibian (2017-08-16-raspbian-stretch.img) as sysroot. I have previously installed some library to compile with -opengl es2. Compilation succeeded but when I run the application I…
Mohamed Hamzaoui
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How i write multiple float data to Arduino from Rpi as master via i2c?

I read many post how Rpi receives float data via Arduino via i2c, with Rpi as master. But i need write floats values to arduino and i don't found any example. I want to use python smbus. Any one have a example? Thanks a lot!
FelipeFonsecabh
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Issues communicating with UART header on Android Things Developer Preview 5 (RPI3)

I am attempting to communicate with a Pi header using Android Things Developer Preview 5. Below is the class I have created to communicate with the header as per the official Android Things documentation: public class UartComm { private static final…
Nisarga Patel
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" transmitting spi data..ioc" invalid argument

Hi guys I am new to coding and I am trying to monitor the voltage and resistance value of a potantiometer by using spi communication on raspberryPi3. I found that code but when I try to run it, the program gives me: Problem transmitting spi…
Batuhan Albayrak
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Start a script to Raspberry Pi without refresh the page

I have a streaming server for my Raspberry Pi. I want to be able to control it with servos (pan and tilt) from the website. Therefore I want to start a python script, that starts when a botton is pressed at the website, without refreshing the page.…
estrella1995
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fio test ends up with bus error

I'm working on Android for Raspberry Pi 3. And I'm trying to perform fio test with the following command: $ fio --bs=4k --scramble_buffers=1 --direct=1 --loops=3 --numjobs=4 --filename=/dev/block/ram0 --name=rand-readwrite --rw=randrw…
andixlm
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Cannot find usb device iot core

Trying to connect to my APC UPS via USB and send it raw data. Package.appxmanifest StartupTask.vb Imports…
Tyler Montney
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How to include three IRQ handlers in one kernel module?

I'm currently learning from Derek Molloy's example in his book "Exploring Raspberry Pi - Interfacing to The Real World with Embedded Linux". I took the example at Listing 16-3, which unfortunately I could not found online. The example contains a…
Widi Widiyanto
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remote build to raspberry pi via Visual Studio 2017

Over the past few days I have been setting up my Raspberry pi 3. I set up the SSH connection between my desktop and the pi and used putty to create the SSH keys and got the connection working but now I've run into a problem. I'm trying to connect…
S.Nicolas
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Sending ascii string command over i2c with node-red gpio or i2c

I'm looking to send an ascii string over I2C in node-red to a Atlas Scientific pH I2C module. I currently have tried using the node red contrib gpio and i2c. I am able to send the command r as ascii number 114 and get a response. But when I try…
chemejon
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Is 2ms a realistic performance goal for small writes to LMDB on a Raspberry Pi 3?

I'm about to begin work on a new project on a Raspberry Pi 3. It will be controlled with a complex GUI so interactive performance is important. I decided to use LMDB for persistence, as - outside performance - its special traits make my system a lot…
5-to-9
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Fire events at specific timestamps during video playback

I'm using a Raspberry Pi 3 running Raspbian. I need to play a video file via HDMI, and I need events to be fired at specific timecodes during the playback of the video. The events are simple write operations to the GPIO. My problem is : what…
Simon
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Raspberry pi 3 Auto 3G connect and disconnect if eth0 down

Good day, I would like to have my 3G modem auto connect too the internet if there is no internet on eth0. When internet on eth0 returns then it must disconnect the 3G modem again. I have successfully managed to configure a USB 3G modem to allow my…
Martinn Roelofse
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