Questions tagged [pi-3]

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

981 questions with no upvoted or accepted answers
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1answer
1k 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
votes
1answer
2k views

RPi3 wireless issue CTRL-EVENT-ASSOC-REJECT status_code=16

It appears the wifi is working, and the device can see my SSID. However when it connects it gets an error: CTRL-EVENT-ASSOC-REJECT status_code=16 I checked my router and the 2.5 GHz network settings....
5
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0answers
2k 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
votes
1answer
9k 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
votes
1answer
363 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
votes
0answers
677 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
votes
2answers
690 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 ...
4
votes
2answers
2k views

Raspberry Pi: Autostart Program in Full Screen

I put the program leaflet on Autostart by adding @leafpad to ~/.config/lxsession/LXDE-pie/autostart Now it starts after the GUI load is finished. But it is not starting in full screen or with ...
4
votes
1answer
474 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
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 ...
4
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0answers
16k views

Bluetooth MAC Address Raspberry Pi 3

I'm trying to connect two raspberry pi 3 betweem them via bluetooth. But the fact is that their MAC addresses are AA:AA:AA:AA:AA:AA Does anyone knows how to assign them a real mac address in order ...
4
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0answers
4k 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
948 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
votes
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-...
3
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0answers
96 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
943 views

new raspbian image doesn't detect usb cdc device

I have a usb cdc device that works fine in raspbian stretch. But when I change the image to new raspbian buster, my usb device isn't recognized. lsusb doesn't list my device at all! I've enabled cdc-...
3
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0answers
245 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
votes
0answers
734 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
votes
0answers
229 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
votes
0answers
478 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
159 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
2k views

Raspberry Pi 3B WLAN Interface not found

I have a problem where my Raspberry Pi 3B (v. 1.2, official board) cannot use its onboard WLAN capability. The onboard WiFi used to connect to the Internet without issue perhaps a year ago. However, ...
3
votes
0answers
329 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
votes
0answers
194 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
votes
0answers
523 views

blank screen on xrdp

xrdp is working up to and until today. I have today "sudo apt-get upgrade" and since then xrdp has stopped working. The login screen comes up but when i get in it is just a blank screen (the aqua one)....
3
votes
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
votes
0answers
1k 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
votes
0answers
45 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
146 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
votes
0answers
1k views

RPi 3 no WiFi problem

Last week I've bought used Raspberry Pi 3 and at the beginning everything worked just fine (WiFi especially). Yesterday I took the board out of its small case in order to measure it (I like to model ...
3
votes
0answers
408 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
votes
0answers
198 views

MQTT TLS not working in Raspberry Pi3

Has anybody got MQTT with TLS working in Pi3 ? If so, please help me to fix my problem.I am using MQTT 1.4 version. I did following steps- I generated both client and server cert files as per https:/...
3
votes
0answers
710 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
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
votes
0answers
1k 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
votes
0answers
178 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
votes
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
votes
0answers
663 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
0answers
593 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
votes
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
votes
0answers
504 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
votes
0answers
113 views

pySerial - UART - Determining when a message has actually been sent (callbacks?) (RTS/CTS hacking?)

For reasons (explained at the end of the post) I need to have a pin change state immediately as the UART finishes outputting a set of bytes. I'm using pyserial & pigpiod on a RPi3B+ and bluetooth ...
2
votes
0answers
46 views

Overclocking Raspberry Pi after the device has booted

I using a Raspberry-Pi 3B+ device and I am trying to change the maximum frequency after the device has booted. From my understanding, this can be done by editing the files under /sys/devices/system/...
2
votes
0answers
74 views

Wiring 12V 5 pin relay (without a module/board) for usage with Raspberry Pi

I'm trying to setup an automated garden as a quarantine project for my mother and I can't really figure out how to properly wire a 12V 5-pin relay module as every tutorial online only shows the ones ...
2
votes
0answers
27 views

Multiple camera modules for analyzing objects up close

I want to build a system where there are 3 cameras connected to the Pi (v3), for up close image processing, the quality isn't necessary, as long it can detect small objects (~0.5cm wide to ~8cm long) ...
2
votes
0answers
171 views

Kivy on Raspberry Pi returning double on_press events

I have an RPi and official touchscreen running Debian Buster and Kivy v1.11.1 using the simple example at https://kivy.org/doc/stable/api-kivy.event.html it is returning double touch events for ...
2
votes
0answers
211 views

ACT led blinks 4 times

My raspberry pi 3 B won't boot. The ACT led blinks 3 times, then it blinks once longer than before, then repeats.No signal on 7" touch display, no signal at HDMI, config.txt hasn't been messed with....
2
votes
0answers
228 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
110 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=...

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