Questions tagged [pi-3]

For questions that apply specifically to the Raspberry Pi 3 and not other/all models.

979 questions with no upvoted or accepted answers
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1answer
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How to start Xorg while showing splashscreen?

I'm creating a simple device with a Raspberry Pi and a touchscreen display connected to it. On boot, I want to show a loading image (a simple gif or jpg) while X is starting. Then a chromium-browser ...
5
votes
1answer
686 views

Rasberry Pi zero and 3 bluetooth transfer speed is slow RFCOMM

I am trying to send a series of bytes from the Raspberry Pi zero W to the Raspberry pi 3 via bluetooth. Im using the PyBluez python package. I believe that Raspberry Pi Zero has Bluetooth 4.1 and ...
5
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0answers
883 views

Can I control GPIO Pins when using Android on the Pi 3?

I want to install Android on my Raspberry Pi for implementing a GUI app, which is easy to create using Android Studio. But now I am confused about how to control the GPIO pins on the Pi 3 to turn on ...
5
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0answers
7k views

Open Splash Page After Connecting to Wifi Hotspot

I'm using my pi3 to display a local "website" as described here Making a Raspberry Pi 3 accessible w/o configuration via WiFi and static IP/URL. Therefore, I'm creating a hotspot with the pi. This ...
5
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1answer
328 views

Wi-Fi transfers hang on Raspberry Pi 3

I was trying to transfer a 50 MB file to my Raspberry Pi 3 via samba and I noticed that after few seconds the transfer slows down until it stops, same thing via scp. It starts but after few seconds (5-...
5
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1answer
2k views

How to blacklist devices on a raspberry pi 3 router setup?

I've recently set up a raspberry pi 3 as a simple wifi router, using: Ubuntu 16.04 hostapd dnsmasq I've followed the following tutorial and all went pretty smooth: https://frillip.com/using-your-...
5
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0answers
616 views

Debugging a RPi using SWD

Has anybody been able to figure out how to debug a Raspberry Pi 3 model B using SWD? To be clear, I'm looking to debug the Pi itself using SWD. We've tried setting up the GPIO pins to use JTAG-SWD, ...
4
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0answers
412 views

Why is my RPi freezing of its own accord?

I own a RPi 3 Model B, which does a very good job of freezing of its own accord, even when not much activity is being done. I mean, I can still move the mouse, but it stays in its last frame and I ...
4
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0answers
3k views

Bluetooth repeater/bridge

I was wondering if somebody already tried to create some sort of Bluetooth repeater or bridge? I know they are not the same, but both systems should work for my needs. In detail, I am trying to ...
4
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0answers
857 views

FT5406 touchscreen sends events but input does not work

I have a Raspi 3B with the official 7" touchscreen attached. The screen works (showed the under-voltage sign when attaching only the screen controller to a 2.1 A power supply, so I'm connecting ...
4
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0answers
399 views

Is it possible to install Rocks Cluster Distribution on Raspberry Pi?

There are lots of websites about making a supercomputer with Raspberry Pi. Is it possible to install "Rocks Cluster Distribution" on Raspberry to have a more efficient cluster?
4
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1answer
1k views

Syncing Image Capture on Raspberry Pi 3 Using Picamera V2

I am currently attempting to synchronize four raspberry pi 3s using Pi Camera V2s to take photos of a stopwatch at the same time. I am using a function generator to send a signal to the GPIO pin. The ...
3
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0answers
43 views

Is it possible to control servos in both directions on the RPi?

I have been working on controlling servos in one direction with PWM control via GPIO ports on my RPi 3. I've worked with motor controllers that use PWM before and it seems that I should be able to ...
3
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0answers
164 views

Microphone is not recording with HifiBerry and Raspberry Pi 3

I installed the HifiBerry driver as specified. The Board is recognized and the audio output works fine. Just the audio input seems to be not working. I checked if the microphone is muted but I can't ...
3
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2answers
321 views

Controlling a High Power 13V DC Motor with in-built Hall Effect sensor

I am a beginner with electronics and RPi. I have a Brushed DC Motor that runs at a constant 13V and draws about 4-5 A while running and about 18-20 A at stall. It also has a single Hall effect sensor ...
3
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0answers
487 views

Timeout waiting for hardware interrupt during work

(Full logs are also posted here) My RPi3B+ have ArchLinuxARM running on it (armv7h version). Latest kernel and all updates (only packages from official repos + yay installed from AUR). My SD is ...
3
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0answers
213 views

Android things keeps restarting

Trying to install Android Things OS on RPi3 B V1.2, but before I can -- or shortly after -- I get to the set-up screen, the OS reboots. This happens repeatedly. Rasperian works great under CPU and ...
3
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0answers
411 views

How can I install the latest kernel from kernel.org to Arch Linux ARM for Raspberry Pi 3 model B?

I am using Arch Linux on Raspberry Pi 3 model B. I want to install a newer kernel (currently I have 4.14.94-1-ARCH kernel installed) I have downloaded and compiled the mainline kernel 5.0-rc5, which ...
3
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0answers
129 views

ADXL345. Bits, resolution and g's

I have a Kistler type 8921 which produces 1g (10m/s2) RMS (at 159 Hz). The ADXL345/Raspberry Pi 3 setup should produce similar g's, but currently doesn't. As can be seen, it is not just about a ...
3
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0answers
314 views

Outdoor Wi-Fi positioning / poor man's GPS on RPI3 Model B

I got used to Google Maps figuring where I am using surrounding Wi-Fi signals, a.k.a. Wi-Fi positioning system. I try it on my laptop and it works, but on my Raspberry PI it doesn't: using Firefox ESR,...
3
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0answers
182 views

How to scan undiscoverable bluetooth devices with Kali?

I set up a Raspberry Pi 3 with Kali Re4son kernel. My goal is to scan bluetooth speakers that are already paired. But paired devices don't show up when I do bluetooth scanning with Kali's tools and ...
3
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0answers
3k views

Rasbperry Pi suddenly stopped connecting to WiFi network defined in wpa_supplicant.conf

My Raspberry Pi 3 running Jessie has been automatically connecting to a WiFi network defined in my wpa_supllicant.conf file for a few months without a problem. Two days ago, the Pi stopped connecting ...
3
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0answers
1k views

Connecting Pi3 ModelB with a Sony PS3 DualShock controller

I bought the following model of Raspberry Pi3 from Amazon. RASPBERRYPI3-MODB-1GB which claims to support: Bluetooth 4.1, Bluetooth Low Energy And I also got a Sony DualShock PS3 controller with ...
3
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0answers
907 views

How to properly trigger multiple Raspberry Pi camera modules via GPIO?

I am working with three Raspberry Pi 3 B boards, which in turns have RPi camera modules V2 connected to each. I followed this very detailed post about triggering another Pi using GPIO pins and it ...
3
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0answers
41 views

Can I use Rasp Pi 3 to detect objects from live streaming videos?

I am doing a project on UAV(Unmanned Autonomous Vehicle) for which I need to detect objects from live streaming videos. Can Raspberry Pi 3 satisfy my needs? Also how is Nvidia Jetson compared to Pi 3? ...
3
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0answers
137 views

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: ...
3
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0answers
354 views

How to control the delay perference of GStreamer OpenMAX H.264 encoder module?

I am trying to build up a streamed network video using Raspberry Pi 3 Model B and a USB camera. After reading this tutorial, I made a working pipeline, but the software H.264 encoder is very CPU ...
3
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0answers
633 views

RPI 3B and Tiny Thermal Printer - Unable to use python library

I'm having trouble hooking up my Raspberry Pi 3 Model B to my Adafruit Tiny Thermal Printer (nb: not the mini thermal printer - this is the one with a mini-USB port built in). I've got it connected ...
3
votes
1answer
3k views

Why does my Raspberry Pi 3 Model B no longer detect wifi networks?

When I first began using my RPi 3 B, I was able to connect to my wifi at home without a problem. However, after attempting to connect to wifi at a different location, I have since been unable to ...
3
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0answers
5k views

Setting up a DHCP server on a Pi v3B with Raspbian Jessie?

I'm attempting to set up a Pi as a DHCP server for a private network of ~10 machines. The pi will be connected to a network switch. So far I've been following this well written guide: https://www....
3
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0answers
985 views

How do I save my game process with RetroPie?

I just got a Raspberry Pi 3 Model B and have installed NES games. How can I set this up for the Raspberry Pi 3 Model B to save game progress on games that should, such as The Legend of Zelda? Once I ...
3
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0answers
169 views

Pi 3 - insufficient USB power available for dual-band Wi-Fi adapter?

This question says "How much current can draw from the USB ports? ......The limit for Pi3 is 1200mA." However, my Rosewill RNX-N600UB Wi-Fi dongle will only operate in the 5 GHz band when plugged ...
3
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0answers
3k views

Possible to repair Raspberry Pi 3 SD card slot?

I accidentally pulled the pi out of the case before realizing the SD card was still attached. The right pad can still be soldered but the left one appears to have been pulled off. Is there anything I ...
3
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0answers
637 views

Disable onboard Bluetooth device and remap UART0 on Windows 10 IoT Core

We would like to use Gertbot card on Raspberry Pi 3 to control motors and to read distance sensors. For that, serial communication using UART0 on GPIO pins 8 and 10 is required. Observing Raspi serial ...
3
votes
1answer
1k views

Having trouble with device or resource busy error in aircrack-ng; raspberry pi 3, raspbian

I was using my raspberry pi 3 today trying to launch a deauth attack using aircrack-ng(Don't worry the network is mine). But I'm not here to talk about hacking I actually need help with setting up ...
3
votes
0answers
545 views

QML without X11

Is it possible to run QML files without X_Desktop environment in raspbian Jessie for Raspberry Pi3? I found this tutorial: EGLFS , but I would prefer if it is possible to compile directly on RPi, ...
3
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0answers
391 views

Extend router network using Raspberry Pi 3 as access point

I currently am using this guide to create an access point using the RPI3 to create a new network, but what I would like is to extend the network to which the RPI3 is connected via Ethernet so that it ...
3
votes
1answer
2k views

Raspberry Pi 3 Windows IoT Core can't see wifi adapter

I am trying to set up the wifi on my Raspberry Pi 3. On the Networking screen in the web interface, the WiFi adapters dropdown is empty. I successfully configured wifi on my board in Raspbian so I ...
3
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0answers
500 views

Windows IoT RPi3 Install Error

I am unable to install Windows IoT on my RPi3. I have signed up for insider and can start the download of the windows image but after it has downloaded about 500mb it fails with the message: "windows ...
2
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0answers
61 views

Interfacing non bluetooth speaker with Raspberry Pi 3

I want a wired connection between speaker and Raspberry pi 3 Model B. Bluetooth or Wireless connection is not my requirement. Regarding my speaker - it should NOT simply output buzzer sounds but is ...
2
votes
0answers
47 views

How to use Raspbee + Raspberry pi (3 B+) + GPRS Shield(SIM7600E-H 4G HAT)

On Raspberry pi, I want to use Raspbee as zigbee controller and SIM7600E-H 4G HAT as GPRS shield for network data https://www.amazon.co.uk/Waveshare-4G-Raspberry-SIM7600E-H-Supports/dp/B07F1NSGQ8/ref=...
2
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0answers
171 views

Make error / Enable monitor mode in Raspberry Pi 3B with Nexmon

I would like to add monitor mode for my raspberry pi 3B (Not B+) by using Nexmon. I am trying the part of [Build patches for bcm43430a1 on the RPI3/Zero W or bcm434355c0 on the RPI3+/RPI4 using ...
2
votes
1answer
1k views

SIM800 GSM Module To Raspberry Pi UART Serial Communication Problem

I am new to Raspberry Pi Zero and I want to connect it with a GSM module for GPRS connectivity. I bought the SIM800A GSM module but its LED is not even blinking one single time. I am able to turn on ...
2
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0answers
84 views

RPI as default gateway

I would like my raspberry to work as a gateway for LAN devices and connect to Internet. Now the default gateway is my router connected to ISP provider. Basically I would therefore like to share the ...
2
votes
0answers
93 views

Safe cut power supply from raspberry

I want to cut safe the power supply from the raspberry with a relay connected to the gpio. I know how to connect to relay to the board but.. When the relay turn off the power line will be cut off to ...
2
votes
0answers
146 views

SPI NOR Flash: Unstable reads

So I hooked up an Winbond 25Q256JVEQ to my Raspi3 via SPI (spi0.0) and want to read its content. I use the jedec-nor-spi dtoverlay so its available as MTD. However when I want to read the chips ...
2
votes
0answers
160 views

USB audio device is displayed as default, but is not

I have set the USB device on my Raspberry Pi to default. The file /lib/modprobe.d/aliases.conf: options snd-pcsp index=-2 options snd-usb-audio index=0 options cx88_alsa index=-2 options snd-atiixp-...
2
votes
1answer
151 views

part incompatibilities

I am trying to control a 4.5V motor with a pi. I am going to use this to control the motor: https://www.ebay.com/itm/2X-L298N-Dual-H-Bridge-DC-Stepper-Motor-Driver-Controller-Board-Arduino/...
2
votes
1answer
478 views

Virtual resolution + scrolling?

I created a small, pocket computer from Raspberry Pi 3 and small 4" display with resolution 480x320. It is very hard to do anything on such small screen, so I've been wondering, if there's a way to ...
2
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0answers
55 views

Any issue with magnet too close to rpi?

I don't think this is an issue, but a search turns up nothing and I just want to be sure. I'm working on a project that involves a single speaker mounted approx. 2.5 to 3cm above a Raspberry Pi 3. ...

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