Questions tagged [pi-3]

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

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15 views

Create an array of Raspberry Pi Computer modules

Has anyone looked into or know of the possibility of creating an array of Raspberry PI computer 3 modules? I would like something like a carrier board capable of holding 4 to 16 of the modules with, ...
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9 views

my desktop is not showing (specifically wallpaper and icons) but taskbar is fine

backstory: i dont have standard raspbian install, instead i installed raspbian lite and then installed DE(xfce) for it, since 2 months it's working fine present: but today suddenly after i logged in ...
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1answer
43 views

sudo command on Raspbian Terminal is hanging

When sudo command is typed and pressed on the terminal, it's getting hanged. Background, I tried to establish the CAN link on the Raspberry PI board. Added CAN link connection command/script upon boot-...
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2answers
47 views

Connect Pi to Laptop [closed]

I have a Laptop, a Pi, with raspbian already installed on the SD card. SSH and WiFi are not enabled on th Pi. I have not internet and I have not any Router. How can I connect the Laptop to the Pi? ...
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2answers
225 views

How to disable the dynamic IP address after assigning a static IP in Bullseye?

Background I upgraded my Pi3B from Buster to Bullseye using these instructions. WiFi is disabled on the Pi. Before the upgrade I had static IP setup and working fine by adding the following lines to ...
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1answer
19 views

python script can only work in geany not in terminal@@

i have one python script send message to my phone using pywhatkit it can run flawlessly on geany IDE.but when i invoke from terminal like sudo python3 /home/pi/Desktop/pyf/whatsappsend.py it run in ...
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1answer
31 views

How can I connect raspberry Pi 4 to submersible water pump

I recently handle a part of my team project which is hand sanitizer part came up with the idea of using a raspberry pi to power and control the hand sanitizer system. It's nothing large scale, but I ...
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1answer
62 views

Sane on Raspberry Pi 3 doesn't find ScanSnap iX500

I would like to install a scanserver on my Raspberry Pi 3 following these instructions. The operating system is the current Raspberry OS: "2021-10-30-raspios-bullseye-armhf-lite". The step ...
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1answer
25 views

How to increase the frame rate in Stellarium

I have a freshly installed Raspberry Pi OS on my Raspberry Pi 3 Model B. According to cat /proc/device-tree/model, the OS name is "Raspbian GNU/Linux 10 (buster)". I have installed ...
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34 views

My Raspberry pi keep show msg : low voltage warning please check your power supply [duplicate]

I have Raspberry pi 3 , and I am using its power supply which give 5V -2.5 A , the problem is that the raspberry Pi keep show this message : low voltage warning please check your power supply
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18 views

Raspberry Pi Mailbox Interface Difficulties

I have been working on a bare metal program on my Raspberry Pi 3 B and am currently working on using the Mailbox Property Interface. I have been able to use it to initialize a framebuffer using the ...
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9 views

Transparent window using pyqt5 on raspberry pi3

I am trying to achieve transparent windows using PyQt5 in raspberry-pi 3, but it's turning into black window. Any help will be appreciated.
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21 views

Motioneyeos not booting on my Raspberry pi 3B

Stuck at this message “Formatting data partition” while trying to boot MotioneyeOS from a Raspberry pi 3B. I’ve flashed a 32GB microSD with the motioneyeos image file using Etcher. Is the problem with ...
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1answer
27 views

Ca-certificates won't allow complete RP Update

I'm trying to install 'Syncthing' on Raspberry Pi, which I have done several times in the past, the install requires that I run apt-get update. This is using Rpi OS "stretch". The update ...
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1answer
49 views

Can my Raspberry Pi Zero W python program be duplicated and resold?

I have a Raspberry Pi Zero W that runs a program under the main username, Pi. I'm going to give this Pi to someone for their own use, however I expect them to use the Pi for their application without ...
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18 views

How to switch Cameras on the Raspberry pi 3b?

I am working on a project and I need to take pictures in different directions depending on a programming input, I can manually switch the cameras and take a photo with them but I am looking for a good ...
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1answer
17 views

How to detect if the user is booting from microSD versus an external USB drive (e.g. SSD)?

I am writing a bash script and I really want a way to detect if the user has booted from a microSD card versus an external SSD drive connected via USB. Ideally, this should work with any PI3/4. I am ...
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1answer
465 views

Libcamera does not work on the latest OS

I bought the new HD RPi camera and want to connect it to my RPi 3. I checked on the Rpi website that raspistill is being replaced by libcamera, so I updated the OS to the most recent build (Bullseye) ...
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0answers
61 views

Pi 3B (without +) regularly losing Ethernet connection (smsc95xx)

I have a problem with some of my PIs losing Ethernet connection every few days to a month. After the Ethernet connection is lost, it does not come back up. Besides the Ethernet connection being lost, ...
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16 views

Scrolling text on MAX7219 dot display is lagging occasionally, not sure how to fix

I am using the max7219 library from luma.led_matrix.device import max7219 However, if I use 12 8x8 dot displays in series, the scrolling font lags on random occasions. It looks like it lags for some ...
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2answers
290 views

My raspberry pi is dead?

I have a raspberry pi 3 B that apparently stopped working after a thunderstorm. When it's plugged the red power led turns on but I can't boot the OS. I checked the voltage on GPIO pins and I get: 2....
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1answer
50 views

Open matchbox-keyboard on top of existing applications

I have a Tkinter script running in fullscreen mode. I have a function which calls the matchbox-keyboard command using the subprocess module when clicked on an input field. This works fine, but the ...
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1answer
205 views

Corrupted SD Card - how to fix, or recover data?

I recently got my hands on an older pi (Model 3B), that I had left at my mom's house some time ago. When I went to start it, it wouldn't boot. The red light came on but the screen remained black. I ...
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1answer
48 views

Why the GPIO light gets switched ON but not SCL1

I am trying to make this circuit I have only attached two pins. By default shouldn't both pins be ON? Why only GPIO 17 is ON (shows light)? I notice that once I connect all the wires, the GPIO ...
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38 views

Creative project recommendations or where to find them?

I'm a relative newbie to Raspberry Pi and I'm trying to decide on a project that might both relate to my interests and help develop my programming skills. I've a Pi3 and have only done some small ...
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24 views

Detect raspberry pi with android smartphone

I would like to find a way to detect a specific Raspberry Pi from an Android smartphone, whenever it gets near the Pi. Background is the following: I want the smartphone to activate a hotspot and ...
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0answers
23 views

Reading SPI data from Atmel Energy meter IC M90E32AS through Raspberry Pi

Iam trying to read voltage values from Atmel Energy meter (AtM90E32AS) IC through Raspberry pi(3b) SPI communication. I made the connection accordingly and set the register values as given in the data ...
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0answers
11 views

How to get the correct speed in low light and low ISO

With IMX219 camera and using piCamera in a Python script with resolution = (3280,2464) I get a photo image with a speed of 1/15 sec and ISO 320, correct auto exposure. Setting iso=100 I get a photo ...
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39 views

Macbook unable to connect to RPi wifi using RaspAP

Maybe the wrong spot to post this, but I'm hoping to get some direction. I'm trying to build a Wireless AP using RaspAP and a Pi 3B. Everything seems to work fine, except for one little issue: I can'...
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1answer
19 views

Assigning priority to callback function for multiple GPIO.add_event_detect

Iam trying to create the error detection application for my battery charger prototype using Rpi.GPIO. I successfully created the add event detect for multiple GPIO pins (totally 8 pins for each error)....
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2answers
117 views

Raspberry Pi 3 Model B v1.2 really slow

My Pi has been running 24/7 for approx 3 years. Is it possible that it is just worn out? I installed a fresh Raspberry Pi OS Lite on a brandnew Intenso Class 10 mircoSD. When I run apt-get update &...
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1answer
40 views

'sudo' not recognized as an internal or external command. Trying to run sudo raspi-config

I am building my first project on a Raspberry Pi 3 using an RFID HAT for Raspberry Pi. I am using Windows 10 IOT Core. The manual for the RFID HAT begins with this: I2C/Serial interface is disabled by ...
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1answer
56 views

Misreadings from hall sensor after using a motor controller

I am measuring a hall sensor included in a motor. A Raspberry Pi 3b+ controls a Sabertooth 2x32 motor controller through radio Signal (ppm) and the Sabertooth output is connected to the motor. I get ...
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1answer
68 views

dtoverlay=gpio-shutdown,gpio_pull=off

I was wondering if utilizing the code below would be sufficient in shutting down and restarting a Raspberry Pi 3 A+ with the use of a TTP223 capacitive touch sensor. By default, the touch sensor is ...
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1answer
73 views

How to enable serial communication on Rasbpian Buster or the lastest OS right out of the BOX?

Latest Raspbian Buster OS and Raspberry Pi 3 V1.2 2015 This I can't get my head around this. Why can't I set up serial communication on Raspbian Buster for Raspberry Pi3 very easily after following ...
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2answers
64 views

Where can I find spec of hardware random number generator used on Raspberry Pi?

I remember stumbling upon the fact Raspberry Pi devices have built-in hardware random number generator. Would someone happen to know where I can find official hardware random number generator spec?
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1answer
81 views

What does setting output high or low mean in RPi.GPIO

If I setup a pin's output to HIGH or LOW, would current flow through it or not? In this example, when I set output to HIGH then the LED turns off. I expected the other way around. The python code I ...
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0answers
82 views

The `pkg-config` command doesn't find the `bcm_host` package. How can I add the `.pc` files from `/opt/vc/lib/pkgconfig` to pkg-config?

I am running a raspberry pi 3B (V 1.2). I am using the proprietary OpenGLES driver (Broadcom). I have just run a full apt upgrade. I am trying to build SDL2 and I noticed that while it was being ...
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1answer
14 views

I am currently doing the 'Build a LAMP website' project and mousepad is not working

I am a newbie to Raspberry pi and I am unable to continue, I am currently at: https://projects.raspberrypi.org/en/projects/lamp-web-server-with-wordpress/2 and in need to use the following command:'...
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0answers
49 views

RPI 3 extremely slow routing speed between 2 wifi adapters

I'm trying to use Raspberry Pi as a WiFi repeater, but routing speed is extremely slow. I've configured hostapd to work on wlan0 (onboard WiFi adapter) and wpa_supplicant on wlan1 (external adapter). ...
0
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1answer
61 views

code using polling working more reliably than code using interrupt

I am coding this lamp circuit in which an LED is switched on/off on alternate press of switch I have written two versions of the code, one using polling and other using interrupts. I found that the ...
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0answers
33 views

Connect Raspberry Pi from Android App through USB

I'm building an android app where there's a requirement to show the temperature in the app from the sensor in Raspberry Pi Controller. For this purpose, I'm trying to connect my android device to ...
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1answer
43 views

Unable to create a switch on/off functionality in RasberryPi

I am trying to create a program which which switch an LED ON or OFF when a switch is pressed. The following is the circuit diagram The python code is import RPi.GPIO as GPIO is_lamp_on = False try: ...
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1answer
61 views

Hardcode RF Codes - RPi-RF

I would like to use the rpi-rf module https://pypi.org/project/rpi-rf/ for a remote control alert system, using a PIR motion sensor as the input. I have so far set up the PIR input and send and ...
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0answers
103 views

Unable to boot two latest releases of Raspberry Pi OS

I'm trying to emulate Raspberry Pi 3 B in QEMU and I was able to successfully boot the oldest OS release from here: https://downloads.raspberrypi.org/raspios_lite_arm64/images/raspios_lite_arm64-2020-...
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0answers
16 views

How to troubleshoot Raspberry Pi 3B that gets random mini freezes

I have a Raspberry Pi 3B with Dietpi as the OS which is connected via ethernet and using the official power supply. I have this Raspberry Pi from quite some time ago, and I noticed recently that ...
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1answer
56 views

Neopixel with raspberry pi

I am using a neopixel for my raspberry pi project. I am trying to control 30 pixels and the strip is 20cm long. Can I use it just by using the pi's 5v pin? Also if I it is possible, how long should ...
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1answer
29 views

Hotspot/Access Point not working, no connection whatsoever

I followed a tutorial on Youtube that would essentially turn your Raspberry Pi into a hotspot/access point. I did the exact same processes he did, even looking at the Pi Documentations to see if I had ...
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2answers
369 views

How to enable both UART (ttyS0 and ttyAMA0) on Raspberry Pi 3b?

I've already read dozens of manuals and stack topics, but I do not figure out if it even possible run both UARTs on RPi 3B. Some tutorials advice to map uart to other pins in /boot/config.txt I tried ...
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1answer
52 views

PC -> LAN -> PI -> LAN -> Router -> Internet

I want to use the pi3 as gateway (to scan network traffic + pihole). My desktop is connected via cabled connection. The route (outbound): Computer, Ethernet port ---EthernetCable---> PI3, USB-...

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