Questions tagged [pi-3]

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

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1answer
161 views

How do I get ubuntu 16.04 ARM64 iso get working on Pi3B

I downloaded ubuntu 16.04 arm64 iso image , and used Etcher to flash on to SD card. But my Pi3 B does not boot ?? anyone faced this issue and how to fix. Thanks in advance.
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1answer
415 views

/boot/config.txt gpu_mem has no effect

I put gpu_mem=512 in /boot/config.txt (which file I had to create), and it had no effect. grep memory /var/log/Xorg.0.log returned only 2,839kB: [ 132.909] (II) FBDEV(0): hardware: BCM2708 FB (...
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1answer
500 views

Where can I download older version of Raspberry Pi Imager

Appreciate any help. I am looking to download older version of Raspberry Pi Imager. The reason is I need to download ubuntu 16.04 arm64 for Pi 3B and Pi4B. The latest imager dooes not show thsese ...
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0answers
1k views

pyaudio - Alsa warnings on Raspberry pi

I am trying to send data through 3.5mm jack. In that process, Everytime i'm getting these warnings import pyaudio p = pyaudio.PyAudio() The following warnings are: Expression '...
1
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1answer
60 views

Setting a GPIO port for an accurate time duration with Python

I am trying to set a GPIO port to LOW for n seconds and set it to HIGH afterwards. The problem is that it's not at all accurate. It varies between a small number of seconds to 2*n or even more. ...
2
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0answers
131 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....
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1answer
42 views

Is it possible to change HDMI mode without rebooting?

I would like to try different combinations of hdmi_group and hdmi_mode without having to reboot. Hardware and OS: Pi3B on Rasbian buster
2
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1answer
58 views

A Raspberry Pi 3 Model B boot problem which happens after the very first installation of Raspbian

Recently I experienced a breakdown of the SD card on a Raspberry Pi 3 B (no B+) I use as a courtesy PC for my nieces/nephews. Since I had two SDHC 8GB cards, I did not worry too much and Downloaded ...
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0answers
42 views

How to turn Raspberry Pi 3's HDMI output to monochrome?

I'm running a Raspberry Pi 3 with its HDMI output connected to a TV. I would like to change the output from present colour to black and white ( monochrome ).
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0answers
26 views

Flashing of LED

This is my first post here so HELLO and sorry if I'm posting in the wrong place. I had assigned a time limit of 40s for led blinking. Can I pause the blinking of this led and make another led to blink ...
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0answers
25 views

connecting a LAN device to openvpn through raspberry pi network bridge

hi i have recently set up a raspberry pi to be a network bridge for my router to my room as i thought it would be quicker to do than wait for the delivery of a plug in network adapter in this lock ...
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0answers
124 views

Compile Linux kernel with toolchain built for aarch64 and uClibc

I am using RPI3 model B I have compiled toolchain using crosstool-ng with the following sample. ./ct-ng aarch64-rpi3-linux-gnu Using ./ct-ng menuconfig, I changed C library from glibc to uClibc. ...
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2answers
42 views

I need to connect my Pi to a piece of hardware via fiber that only responds to rs232 commands [closed]

I have an Ethernet to fiber converter that I can interface to the PI but I am not sure how to or if its even possible to setup the ethernet connection with the fiber convertor to pull data via rs232 ...
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0answers
208 views

Cannot log in to raspbian buster with default username and password

I have an issue logging in to my new raspbian buster (raspbian 10 Raspbian Buster with desktop and recommended software) using the known default {pi, raspberry}. My keyboard is in English and I have ...
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0answers
51 views

Is my PI broken or the LCD screen?

So I have an LCD screen which plugs into the pi. The pi works fine, but when I do the whole LCD-show in the terminal and it restarts it stops at either “starting login service” or “starting message ...
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1answer
27 views

Raspberry pi 3 with centos 7 error

i have problems with my raspberry pi 3. I use windows 10 on my laptot and it is ethernet connected. I have installed centos 7 into a micro sd through Universal-USB-Installer (centos is without any ...
1
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1answer
65 views

How to use an lcd panel as keyboard?

I'm quite new to raspberry pi and custom Projects but I'd like to use an lcd touch panel like this (https://bit.ly/39HZpe4) as a keyboard for my raspberry pi 3 model b. I saw this in this video: ...
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2answers
881 views

Error in pyarrow while installing Apache Beam in Raspberry Pi

I'm using a Raspberry Pi 3 B+ and should be installing the Apache Beam SDK to connect it to Google Cloud Platform services such as Pub/Sub, Dataflow, and BigQuery. I've got Raspbian GNU/Linux 10 (...
2
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2answers
103 views

Raspberry Pi WLAN Bridge

I have a range extender on one side of the house but it gives out really poor signal and looks to be slowly dying. I have a spare UniFi AP that I want to use but no Ethernet connection on that side ...
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0answers
18 views

Connect access point to RPi's ethernet port

I get a public wifi in my living room, which I would like to extend for the rest of my house. I have an Android phone, RPi 3b and Belkin N300 wireless router. The setup I have in mind is Public ...
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0answers
33 views

pi 3 won't connect to the internet through an Ethernet cable

Overnight I left my pi on so it could keep up the website I am hosting but come day my pi was not connecting to the internet so as I had setup a static ip (router side) I decided to delete the ...
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2answers
286 views

How can I run a cross-compile binary on my RPi?

I compile a simple Hello World programm with different compilers (from https://github.com/raspberrypi/tools): ./arm-linux-gnueabihf-c++ ~/Desktop/hello.c -o ~/Desktop/myapp -static The compilation ...
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0answers
98 views

Adafruit BMP280 Temperature Sensor with Raspberry Pi

I am using Adafruit BMP280 Temperature sensor breakout board with Raspberry Pi 3 Model B. OS- Android things. I am using library: https://github.com/androidthings/drivers-samples/tree/master/bmx280 ...
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3answers
1k views

Folding@home on RPi 3 model B?

How to install Folding@home on RPi3 B on Raspbian, if it’s possible at all? The Folding@home download page does have 64 and 32 debian versions, but downloading them results in an error “A package ...
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0answers
35 views

Raspberry pi and ESP32

i am working on a school project and i need help with it. i have MQTT client code that will run on the ESP32.It polls the DHT-22 and publishes the sensor data to a topic called temp humidity. then i ...
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0answers
104 views

Pihole only resolves clients names on IPv4

I have setup Pihole on my Pi and evrything works except the client resolvement. Ipv4 adresses get resolved in the certain names i have set in my Router but IPv6 adresses dont get set. I have set ULA ...
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1answer
137 views

Will SDIO-mode second SD card conflict with integrated WiFi?

One is able to add a second SD card on RasPis by activating the SDIO interface. However, on the Pi 3 and Pi Zero, the integrated WiFi is connected via SDIO. Can you have both at the same time?
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2answers
110 views

My page doesn't record Data with Mysql and apache

intaxing.in/register.php or(website probably don't work) test.intaxing.in/register.php You can look here for the actual working page that did not record anything it just asks again & again for ...
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1answer
454 views

Installing the recommended software after install the desktop only version of raspian

I have installed raspbian buster without recommended software on my raspberry pi 3b+ and i am curious to see what are the recommended software. What do i have to do to install them on top of the ...
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0answers
58 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 ...
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1answer
52 views

After Power Failure, RPI now just cycles through boot sequence without booting

So some workmen were working at the house switch box which created multiple power failures for the RPI. Now it is not working. At first, it was just dead (red power LED, but nothing else) so I ...
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0answers
46 views

rasberry pi 3 says it's hot (50*C), but is cool to the touch

My raspberry pi 3 reports a [stable] temperature of 49.5 *C - which is pretty warm. However, when I touch all of the components with my finger, including the CPU, it does not feel hot or even a ...
1
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1answer
137 views

Problem with connecting my PI Samb Server to windows

Guides I used to create this: Build a Raspberry Pi NAS How to Turn a Raspberry Pi Into a NAS for Whole-Home File Sharing So currently I created a Samba server with x2 external HDDs in raid 1. I ...
2
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1answer
2k views

How to connect 3W 8Ω speakers to Raspberry Pi 3.5mm audio jack?

I have a pair of 3 Watt 8 Ohm speakers. https://www.amazon.in/JST-interface-Production-Raspberry-Projects/dp/B0738NLFTG My questions: I want to connect it Raspberry pi 3. How can I do that? From ...
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0answers
55 views

Black screen after boot on a raspberry Pi 3 model B

so I have been running my Pi for a few moments already and after storage time, tried to boot it and it would do everything normally, but after displaying the "welcome to raspberry Pi desktop" screen, ...
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0answers
153 views

Raspberry Pi connect to external RFID Module FDX-B/Animals

I have purchased an RFID reader which is supposed to be able to read implants that are in animals RFID https://www.ebay.com/itm/134-2K-AGV-RFID-Animal-Tag-Card-Reader-Module-TTL-FDX-B-ISO11784-85-...
2
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2answers
3k views

Wireguard installation

So i was following this guide: https://sigmdel.ca/michel/ha/wireguard/wireguard_02_en.html#requisites It should be pretty simple but when installing wireguard my pi says: Building initial module for ...
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2answers
250 views

How to connect to Raspberry Pi remotely using laptop to see camera output

I have just completed my project on an object tracking robot using raspberry pi and I want to be able to view my live video output remotely but I cant seem to find a way how to do it. What I ...
2
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1answer
303 views

Ssmtp won't work

So i'm trying to get ssmtp with mailutils running for unattended upgrades, but it won't work. I was following this guide: https://raspberry-projects.com/pi/software_utilities/email/ssmtp-to-send-...
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0answers
48 views

Raspberry Pi 3 and DLink N300 not working

I'm trying to get an additional wifi working on my raspberry pi 3. uname -a Linux raspberrypi 4.9.35-v7+ #1014 SMP Fri Jun 30 14:47:43 BST 2017 armv7l GNU/Linux lsusb Bus 001 Device 006: ID 0bda:...
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4answers
60 views

Sudden delay in Raspberry while writing data to file

I am using a raspberry Pi 3b+ (Linux raspberrypi 4.19.88-v7+ #1284 SMP Wed Dec 11 13:46:41 GMT 2019 armv7l GNU/Linux) to log data obtained from an experimental setup. I read data at 1kHz and dump it ...
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0answers
51 views

Python3 Program Suddenly Given Error Messages Regarding Request Code

I have been running a python3 program that is using request and it has been running fine for the past month. Today when I rebooted my Pi Model 3B+, I am getting these errors when I restarted the ...
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2answers
68 views

connect Raspberry Pi3 with Xbee

I used Xbee s1 pro (configured as EndDvice) connected to raspberry Pi3 for getting the RSSI of another Xbee s1 pro configured as coodinator. I've the following error in first line (from xbee import ...
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0answers
76 views

Minecraft 1.13 Java edition

I have had 1.12.2 running for a while now, most servers are retiring from existence or changing to 1.13. Is there a 1.13 setup script somewhere or can someone make one for raspbian buster? I don't ...
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0answers
36 views

RPi Wireless LoRa Signal Synchronization

I have a RPI3B that I'm using with pigpio to create a waveform to transmit a square wave signal at ~200Hz over a wired connection. For each transmitter signal pulse, a GPIO pin then sends a signal at ...
4
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1answer
167 views

How is CPU in Raspberry Pi 4 +36% faster than for Raspberry Pi 3?

CPU benchmarks show that the Raspberry Pi 4 outperforms Raspberry Pi 3 by +36% https://www.geeks3d.com/20190930/raspberry-pi-4-vs-raspberry-pi-3-cpu-and-gpu-benchmarks/ How is this possible given the ...
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0answers
35 views

White screen after selecting something in raspi-config

I wanted to activate the camera on my RPI 3 but in raspi-config when I selected the camera just a white screen appeared. Do I just have to wait or is something wrong? UPDATE: I'm on Raspbian ...
2
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1answer
113 views

How can Rpi communicate with Arduino in RF (Radio Frequency), Say Using nRFL2401+?

I need to transmit and receive data between Rpi and Arduino, in RF (Radio Frequency). I must say I have next to zero experience in this field. So any help, papers, documentation, book or manual would ...
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0answers
37 views

Why does EmulationStation block GPIO event loop?

I am working on a custom startup script for the Kintaro super kuma 9000 (link is down ATM) case for my raspberry pi 3B+ Here is the minimal example: import RPi.GPIO as GPIO import os import time ...
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0answers
15 views

Audio stopped work on Rasbian Lite after reboot

So I know there's a lot of similar posts here, but I've read everything on the first 2 pages of Google and no luck yet. There's only one command that does actually produce audio for me: /opt/vc/src/...

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