Questions tagged [pi-3]

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

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12 views

write and receive image to embedded modem via txd rxd in raspberry pi 3

How can I send and receive image (page) to embedded modem via Txd Rxd in raspberry pi3 using python ? And how can configure buadrate and flow control using Cts Rts?
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27 views

Why is gpioinfo not showing me pin names?

I'm running the same image on 2 different Pis: 2020-08-20-raspios-buster-armhf-lite.img. Kernel 5.4.51-v7+. One Pi is Pi3, and the other is Pi4. On both, I installed gpiod, and ran: $ sudo gpioinfo ...
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1answer
14 views

How to enable console via uart1 in yocto for raspberrypi3 image

I'm using Yocto-dunfell for getting custom my Raspberrypi3 image. Here I want to enable serial-console via uart1. for that I have given change in my files- local.conf: ENABLE_UART = "1" ...
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24 views

Stream Tv Screen to Raspberry Pi [closed]

I would like to stream the screen of my Samsung Tv (Tizen) in very low Pixel Quality to my Rasperry Pi. What do you think is the best interface for this? Usb? Ethernet/Wlan? The Raspberry Pi converts ...
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67 views

Pi Cluster Mining

I would like to cluster Pis, maybe overclock if needed (Any model works fine). What is the best way to get profit from mining? Any coin works as long as it has an exchange. My power costs: $0.04 kw/h ...
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20 views

my pi changes its MAC adress after working with openVPN

I have installed OpenVPN on my raspberry pi 3 and launched an openvpn client so I can access it from anywhere. That worked really fine but I have noticed that after each reboot of my raspberry pi it ...
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1answer
41 views

Self Hosting Raspberry Pi for Discord Bot

I've sucessfully set up my Raspberry Pi to host my Discord Bot, from these instructions (albeit a bit outdated), but from what I know, I had to connect a monitor and keyboard to start the raspberry pi ...
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25 views

How to solve Raspberry Pi 3B & Bme280 Remote I/O error

Let me start off with the components used: GPIO extension board to connect the raspberry pi to components Bme280 (Purple thingy) Pi 3B Problem description: This problem was intermittent at first. We ...
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2answers
39 views

RPi 3 B+, set defaults for GPIO pins on boot and shutdown

I am using Raspberry Pi 3 B+ with Linux raspberrypi 5.4.83-v7+ #1379 SMP Mon Dec 14 13:08:57 GMT 2020 armv7l GNU/Linux to control a set of relays. I set: gpio mode 7 output gpio mode 0 output gpio ...
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1answer
33 views

Raspberry Pi 3 Wifi Adapter Problems

I have a Raspberry Pi 3, model B+. A few years ago, the wifi adapter started to fail (I sometimes had to reboot it, disconnect it, etc. to get it to work), and finally it eventually died. So a little ...
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59 views

Install Canon printer in CUPS on RPI3

I'm trying to install a Canon MF4570dw in CUPS on a Raspberry Pi 3, but I can't make it work. This is what I've tried so far: 1. Install the printer from PPD files I've extracted the latest Canon ...
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1answer
22 views

Why Interface wifi Change every reboot?

I connected a wifi adapter, I have a different connection configuration for each one but when restarting the interfaces change, wlan0 -> internal wifi, wlan1 -> external wifi After reboot: wlan1 ...
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30 views

Autostart of executable does not show the correct icon and path

I have an executable file that are generated from a python program by using auto-py-to-exe, a gui front for pyinstaller, and a .ico file for a 64x64 icon, both placed in /home/pi/TestAS/Program. The ...
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2answers
87 views

Raspberry Pi 3 B insanely slow on basically all tasks

My Raspberry Pi 3 B is only connected via Ethernet to the network and running a couple of server tasks, among them an HTML web server (nginx PostgreSQL Typo3). This was working perfectly fine for ...
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1answer
54 views

Raspberry Pi WiFi Hotspot / Access Point

I am a beginner Raspberry Pi user and my knowledge is mainly around software. I don't know the correct terms for what I am trying to do so this may be a duplicate question. Is it possible to connect ...
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20 views

Python sound recognition?

I'm trying to program my Pi to monitor for specific sounds like buzzers, alarms, etc. I've seen articles suggesting the use of a "sound sensor", but I already have a microphone (an AIY ...
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3answers
72 views

How to schedule turning off and on of a pi4 using cron?

How to schedule turn off and on of a pi4 using cron ? Hello, to save power I wanted to schedule precisely when my RPI has to be turned on and off. I think Cron was a good solution so I try to edit ...
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1answer
54 views

Turn on an LED with dimming and stay on

I want to start the LED gradually with dimming by using PWM. And then once at a ChangeDutyCycle(100) I want it to remain on GPIO.output(led, GPIO.HIGH). import RPi.GPIO as GPIO import time led = 17 ...
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24 views

How to operate the camera on raspi3?

My material: Raspberry 3 + camera (official) purchased together and never used before Validated interfaces: ssh, vnc serial-console and camera Added software: Apache, php, mariadb phpmyadmin I took ...
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0answers
38 views

Change the CPU Core Voltage from terminal

I was wondering if anyone is aware of how I can change the CPU Core Voltage of a Raspberry pi using system calls from the terminal. I know that we can do this by setting the over_voltage parameter in /...
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25 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/...
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28 views

Specifics on connecting RFM69 to pi3

I am trying to follow these instructions to test a RFM69 module added to an Raspberry Pi 3. This is likely rather naive, but I would like to know details on how to connect the pi to the module. The ...
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1answer
31 views

Raspberry Pi Model B Current Overdraw from 3.3V Pin

I am using RPi3 ModelB V1.2 for a motor control project. I am connecting Pin1 (3.3V) for power to a micro dc motor. The current drawn by the motor is approx ~70 mA whereas the RPi sources mention that ...
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1answer
35 views

How do I make my Raspberry Pi act as a wireless USB controller? Not over the same network but remotely using a 3G/4G & LTE Base HAT [closed]

I am trying to download data from a USB based device remotely. i.e. Using a WiFi dongle or 3G/4G & LTE Base HAT. Am I able to install a driver for a WiFi dongle or 3G/4G & LTE Base HAT on an ...
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1answer
36 views

How to make Raspberry Pi connect to my Wifi using headless method?

I have followed many tutorials (actually they have been doing the same thing) on how to set Raspberry Pi to connect to my WIFI but I am not winning. I have used the Headless method and my network file ...
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107 views

No analog sound in Raspberry Pi 3

I have a Raspberry Pi 3 with Raspbian Buster installed. When playing Youtube I get no sound through speakers connected by audio jack. After some research, I did the following: 1.Audio output is set to ...
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1answer
28 views

Access RPi's Web Server Connected to Smartphone Hotspot [closed]

I built a web server with Flask and I am able to access my website on my LAN. Instead of connecting my Pi to my router, my plan is to connect the Pi to my smartphone's hotspot, for portability. I don'...
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1answer
28 views

Corrupt SD card on Pi but not in Windows

When I boot up my Pi all I get is a solid red light, not the green one. I believe this is because the SD card is corrupt, but it was working fine the other day. I put the SD card in my windows PC and ...
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32 views

How to play through bluetooth speakers with RPi renderer on lan and openhome/linn android phone control point

Using RPi3b and clean installation of RaspberryPi OS Lite and connecting to network using lan. Media is stored on NAS and served to lan by minimserver. I have installed upmpdcli and mpd on RPi and ...
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28 views

Why I get “segmentation default” when add module to kernel?

I have build softuart.ko and add into kernel, but I got "segmentation fault" error when run insmod. I get code from https://github.com/themrleon/RpiSoft-UART. The detail message error I got ...
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2answers
56 views

OS image with ssh enabled

My Raspberry Pi appears to boot but there is no HDMI output. I’ve tried various troubleshooting steps but with no success. Before I go down the route of buying another Pi I was wondering if there’s an ...
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1answer
27 views

Images with Multiple kernel to share among Pi-B, Pi-3 and Pi-4

I have 3 models of Raspberry from ARM-v6 to ARM-v8 and would like to have SD cards that i can exchange among them. After testing my SD IO have realized that Retropie and RaspberrOS works well on Pi1 ...
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64 views

Connect multiple bluetooth barcode scanners to Raspberry Pi 3

I am working on a project for my university. I want to connect several Bluetooth barcode scanners (OPN2006) to a Raspberry Pi 3+ by using the Bluetooth SPP. I managed to make the connection to one ...
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25 views

Max. data-transfer-rate for RPi 3 over Wifi

Q1 What is the maximum data-tranfer-rate for the RPi 3B onboard wifi as access point? Q1.1 If it's > 72 Mb/s what does the config for hostapd.conf look like?
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1answer
46 views

Raspberry Pi3 AutoLogin doesn't work

I recently updated my Raspberry pi3 (non b+) from Raspbian jessie to stretch and then to buster (it's also rocking Retropie 4.7.1 on top of that). And for some reasons the autologin function : raspi-...
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32 views

450MHz - 2.4GHz Receiver

There is a device in my house that is broadcasting in the 450MHz - 2.4GHz range. I do not know the exact frequency that the device is broadcasting on. I am looking to use my raspberry pi to receive ...
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1answer
35 views

Pi-3 virtual box

I have raspberry pi 3b with kali linux, i want to know that is it save to install metasploitable 2 in virtual box in raspberry pi 3b. Will my raspberry pi be able to handle it because it have only 1 ...
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0answers
16 views

Autorun Server Script only when booting to CLI

I've been trying to set up my Pi to run two different server instances. The first one I've successfully set up to launch a web server and Chromium into Kiosk mode after the Pi boots up into its ...
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3answers
148 views

How to use Rasbperry PI 3 or Raspberry PI 4 as VPN Router?

I would like to use either Raspberry PI 3B 1GB or Raspberry PI 4 8GB version as VPN Router. I have the following: 4G Router Either Raspberry PI 3B 1GB or Raspberry PI 4B 8GB TP Link Router My plan ...
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0answers
26 views

Twin touchscreens on Pi 3/4

I'm looking at a project where I will need to drive two separate displays from a Pi, both of which are touchscreen - specifically GT911 type on a separate I2C connection. This will almost certainly be ...
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47 views

I have bought a Raspberry Pi display. It’s working good, but it has 3 buttons on it and I don't know what these buttons are for. Can anyone tell me?

I have bought a rassberry pi display its working good but it have 3 buttons on it and i don't know what these button are for, so can anyone tell me ?
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27 views

Add startup app in config

I have a raspberry pi zero w and I need to add a python script to startup just by editing the files in boot unit, instead of adding a line to cron using terminal. Thanks for help.
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1answer
147 views

No devices listed in OMV: RPi3+RPiOS+USB-3 SSD

I have a Raspberry Pi 3b running the latest version of OpenMediaVault, which I installed using the official-ish script onto a clean and updated Raspberry-Pi OS installation that I created with ...
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23 views

Eclipse 4.18 on Raspberry Pi

I would like to install newest Eclipse 4.18 for C++ development on Raspberry Pi 3 with 1Gb RAM. Is it possible to do so with such hardware resources? Will it run fine on Pi 4 with 8Gb RAM?
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1answer
266 views

How to execute a Python script on RPi remotely and receive data? [closed]

Question: I am trying to run a Python script remotely on my RPi from another python script on my computer. For now, I have created a local network on my RPi, that my computer can connect to. I tried ...
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4answers
326 views

Using single 5V relay module (jqc-3ff-s-z) - Asking for help

I have a developer background missing the electronics background. I read some threads with great interest: Using single 5V relay (jqc-3ff-s-z) - safety advice required and 5V relay (jqc-3ff-s-z) I ...
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0answers
68 views

Ubuntu Server 20.04.1 32bit vs 64bit on RPi3 Model B

I want to use my RPi3 Model B as web server (classic LAMP stack + python, maybe other things too) where I will host my own web-based projects. I'm now deciding which OS to run; I have tried following ...
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1answer
28 views

Raspberry Pi 3 Stops Booting

I have been using my Raspberry Pi 3 A+ for a few months now, and recently I ran sudo apt upgrade && sudo apt update. After this, the raspberry pi worked fine, but after I rebooted it would ...
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25 views

Raspberry Pi asking for Username and Password GUI and Pi folder been removed

I installed OpenVPN on my raspberry pi 3b+, I had some problems while trying to connect to the VPN server I tried some solutions after that the terminal on the raspberry pi changed its name. I reboot ...
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1answer
68 views

Is it possible to make a WIFI to LAN Bridge with the RaspberryPi3b and Bridge Utils?

I am currently trying to make a bridge between the Wifi and Lan on the Raspberry Pi 3b with Raspberry Pi Os Lite for an Assignment. The Task is to connect the Raspberry to the Wifi and then Bridge it ...

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