Questions tagged [pi-3]
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
3,401
questions
1
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0answers
20 views
ad hoc on raspbian buster pi 3
I have read a few other questions about this topic in this network and other places. The problem is they are all different and none of them have worked on Buster. Here are my questions:
1- With ad-hoc,...
1
vote
0answers
14 views
How to crosscompile a kernel for raspbian in an arch linux host?
I have a raspberrypi 3B and want to compile and install a new kernel on it, but I only have an arch linux(x86_64) host to compile it on.
Following the official documentation I get stuck trying to ...
0
votes
0answers
25 views
How can I get my pi3 to consistently display to the monitor?
I have a pi that will not stay awake and display to the monitor consistently. After 10 minutes it will blank. Here are the methods I have tried so far:
Adding xscreensaver, and editing it in the menu ...
1
vote
0answers
10 views
Using the Google AIY kit with Ubuntu 18 (ARM)
I installed Ubuntu 18 (ARM) on a Raspberry Pi 3B so that I could use ROS melodic to control an iRobot Create2. Everything has been going splendidly until I noticed the Google AIY Voice kit I had ...
0
votes
0answers
11 views
RPi 3B+ hosting a video stream no longer running
I have a Pi 3B+ running Raspbian Buster which has the camera module setup that was hosting a stream in my LAN for over a year. It is inside a Kestrel nesting box and has suddenly stopped working (...
0
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0answers
4 views
Building Spring application failure [migrated]
I want to figure out what went wrong with my application.
It is here:
https://github.com/Daniel-Avo/RaspberryPi-Locer-Controller/tree/development
I'm running it on Raspberry 3 B+ and some errors ...
0
votes
1answer
40 views
Communication between Raspberry pi and Android studio Application
I've created a mobile application using android studio to control some leds, sensors, and locks. So I'd want to connect my mobile application to my raspberry pi to send and receive data, how could I ...
0
votes
1answer
19 views
Troubles understanding routing rules
I'm trying to use my RPI3 in order to read datas from ethernet communication and send them over wifi to a remote FTP server.
I've been able to connect my RPI3 to internet via wlan0 so far, however I'...
1
vote
2answers
52 views
433MHz RF communication between Arduino + Raspberry Pi
I bought a 433MHz receiver and transmitter to send data from a Raspberry Pi 3 to an Arduino Uno.
I searched the internet for tutorials, Arduino StackExchange and Raspberry Pi StackExchange but I did ...
0
votes
3answers
40 views
How to find reboot/shutdown cause in Buster OS?
I was analyzing my raspberry pi for reboot and its time and its cause. Earlier I was working on Jessie and I was able to understand the reboot or shutdown is normal by observing the syslog file for ...
0
votes
1answer
39 views
How to check what is going wrong during boot time of a possibly bricked Raspberry Pi 3 Model B?
I have a Raspberry Pi 3 Model B before me with the following history:
For several weeks this device was inside a Cable Box and was doing a lot of I/O on the SD card (and not on an USB stick as it is ...
0
votes
0answers
27 views
How do I restrict SSID logon info on a user basis?
Currently, when a user logs on, the network last used is connected. Do not want this to happen when the "guest" user logs on if the previous user was on the primary network. Also, logon ...
0
votes
0answers
17 views
Garbled Characters on SSH
I am using a RPI3 for my project, sometimes the device stops working (e.g web server stops responding, or some other functions stop working correctly) and when I try to check the problem by SSHing to ...
1
vote
0answers
28 views
How do I fix or troubleshoot my Raspberry pi 3? [closed]
This is my first raspberry pi project. I got a raspberry pi3 with an alpha bot kit and I am trying to set the RP3 up. When I plugged it in I didn't get the boot up screen that was described in the ...
2
votes
2answers
46 views
Does Raspberry Pi 3B have polyfuse? Can USB ports blow polyfuse? [duplicate]
Does Raspberry Pi 3b have polyfuse? If it does, under what conditions can it be 'blown'? I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for ...
0
votes
0answers
26 views
RPi3 randomly freezing and timing out SSH connections
I have set up an RPi3 running a Node.js server (with pm2) in a remote location. Even though the internet is quite fast, the pi sometimes times out or is very very slow.
Recently I have set up a ...
0
votes
1answer
98 views
Raspberry pi with HDD and SSD not booting on reboot
I have a Raspberry Pi 4 B with 2 disks connected via usb. One is an SSD and the other is an HDD. Both of them are in SATA to USB cases that have their own power supply each.
I've configured the Rpi4 ...
1
vote
0answers
30 views
Raspberry 3B+ freezes when using two webcams
I attached 2 webcams and capture images once in few minutes using fswebcam. No problems. (Some generic 2K webcam and a Microsoft LifeCam HD 3000)
However, the RaPi froze "in production" ...
1
vote
1answer
37 views
PiIR TypeError: unsupported operand type(s) for /: 'NoneType' and 'float [closed]
I use the PiIR module to record infrared light buttons and it works. But when I use piir play I get the following error. Does anyone know how fix that?
Keep in mind:
I use Python 3.7 and PiIR 0.2.4
...
0
votes
1answer
46 views
Offline raspberry and IP addess
I am trying to use my raspberry through SSH, in order to connect to it I wanted to set a static IP address for it. While being connected to my home network, it works fine, the IP is probably set by my ...
1
vote
1answer
61 views
Raspberry Pi 3B - Adding extra caps to make more stable power lines?
sometimes a flash on screen appears indicating power supply cannot deliver what Pi needs. Even when I have original power supply ( 3A) and total consumption of Pi doesn't exceed 500 mA. Maybe is power ...
1
vote
1answer
16 views
dnsmasq, have to manually set dns after each reboot
I have a small problem, i'm using dnsmasq and NetworkManager. Every time i reboot, i check the resolv.conf file and the nameserver here is always set to 127.0.0.1 (nothing alarming here) except I ...
1
vote
1answer
57 views
Fail to detect SPS30 particle sensor with I2C on Pi 3B
I have connected a number of I2C sensors (BME280 temperature, humidity pressure sensor, a TSL2561 light sensor and MLX90614 IR thermometer) to a Raspberry Pi 3 and they work fine. I am now trying to ...
0
votes
1answer
39 views
Booting raspberry pi 3 model b (not b+) out of the box without SD card
My raspberry pi 3 B's sd card slot broke. Is there a way to boot it using USB or Ethernet? Are there any settings I can apply to a fresh install of Raspberry Pi OS on a USB drive? The board's version ...
0
votes
0answers
28 views
Raspberry Pi dead? Heating up, high pitched noise + no power to USB
It looks like my Rpi is dying, but I'm hoping I can still save it somehow.
It's a Pi 3 B+ that I've used for the past year or so on and off, mostly to drive a NeoPixel strip.
A few days ago the strip ...
0
votes
0answers
26 views
AccessPoint doesn't allow me to connect my device to raspberry
I am trying to configure an Wifi access point on my raspberry. I have created a virtual interface that enables my RPI (3B+) to still use wlan0 for wifi connection and "apwlan0" for ...
0
votes
1answer
27 views
How do I install Java 7 on Raspbian Buster?
I have a program that runs with Processing 2.2.1. I have downloaded Processing 2.2.1 from the Download page, but the Java included in the program is not compatible with the Raspberry Pi.
https://...
1
vote
1answer
382 views
Docker-Compose won't install on Raspberry Pi 3
Most guides that I found to install Docker Compose on Raspbian resolve around an installation via pip, e.g.
sudo pip3 install docker-compose
Unfortunately, if I try that on my Raspberry Pi 3, it ...
0
votes
0answers
26 views
I cannot make 7Segment 4Digit TM1637 to work
I bought 7Segment 4 Digit TM1637
And i wan to make it work with Raspberry Pi 3B
However, it doesn't work
I think i wired everything correctly,
and i used this python lib
https://pypi.org/project/...
0
votes
1answer
33 views
Controlling 4 servo motors through hardware PWM
I am working on a some time-critical system that will run image processing and controlling 4 SG90 servo motors. In short, I will do visual-servoing.
Since I will do visual servoing, I don't want to ...
0
votes
1answer
93 views
Read binary data from serial port and save in file
I am link modem to pi3 via serial port and configure this port .
When i receive data in my python software from serial port and save bytes in file, i note i receive too mutch data ,
I am receiving ...
0
votes
0answers
16 views
WiFi Transfer of Data from RPi to Smartphone without Internet
I need some help. Is it possible to transfer data from a RPi +3B,
using WiFi to an Android or iOS smartphone? There would have to be a two way communication between smartphone and RPi. There is no ...
0
votes
1answer
24 views
Send data to mosquitto installed on raspberry
I'm really new here and I have a question about the raspberry pi 3b+. I developed a little IoT application. Basically I read values from a sensor and then send them on my broker topic via mosquitto.
...
1
vote
0answers
42 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 ...
0
votes
1answer
19 views
How is the circuit getting power
In the pic, I have connected GPIO 17 to resistor, which connects to an led which connects to the ground. The rasberry pi is connected to the board via the ribbon. I have not explicitly connected the ...
0
votes
0answers
35 views
How can I dim my 7" LCD touchscreen display using Raspberry OS?
I have a 7" TFT LCD and I am building my own car head unit but obviously it is vital that it can dim. There are dim buttons on the board and an on/off screen button.
I have tried using:
echo n &...
1
vote
2answers
39 views
How voltage tolerant is the RPi 3 A+ micro-B USB power connection? [duplicate]
I've been reading about power supply requirements for RPi and want to learn more about the practical limits in addition to the design limits. What is the power protection circuit (if any) on the micro-...
0
votes
1answer
22 views
What is the relationship between angles and pulse length of servo motor?
I've been working on a project where I've to drive the servo motors. I am using Raspberry Pi 3B+ model and Adafruit PCA9685 to drive the servos. For that I need to find which angle is at what pulse ...
0
votes
0answers
26 views
Booting up my Raspberry
I am working on a laptop and I did all the steps on the raspberry pi website for my raspberry pi 3. I plugged everything in raspberry pi and it has red flash.
0
votes
0answers
102 views
How to turn camera into ONVIF IP Device?
I am new to Raspberry Pi and also new to ONVIF.
I can you turn a raspberry pi camera into ONVIF compatible IP camera and also add different profiles and edit the features in the profiles.
I don't know ...
0
votes
0answers
234 views
AttributeError: 'NoneType' object has no attribute 'send' for my LED on off code through blynk
I am trying to run a cod for LED on and off through blynk app
but every thime it is showing this error:
AttributeError: 'NoneType' object has no attribute 'send'
my code is
import RPi.GPIO as GPIO
...
0
votes
0answers
16 views
Issue with read Xbee Data
Here, I am interfacing Xbee(Rx) with raspberry pi 3 (Model B) and on another end Xbee(Tx) with Arduino UNO. On the Tx side I have a mechanical tool which is sending two types of data. But I am not ...
0
votes
0answers
18 views
Set up wifi on raspberry similar to google mini
I'm looking for a way to send my raspberry to a colleague and easily have him connect to it to his local wifi headless. I read about writing a wpa_supplicant.conf file for a particular wireless ...
0
votes
1answer
121 views
`No module named 'numpy'` after `apt install python3-numpy`
I want to use the python package 'numpy'. After a bit of research, I found that using apt install python3-numpy seems to be the recommended way of installing it on the raspberry pi 3 (within a docker ...
1
vote
0answers
70 views
QT Creator - Raspberry Pi - 3.5" TFT - Could not initialize egl display
Please forgive my ignorance but I'm new to Raspberry Pi/Linux.
I'm trying to make a touch screen app for the Pi using a 3.5" touch screen (xpt2046) and QT Creator (5.12.5).
QT Creator is running ...
1
vote
1answer
53 views
Are the ARM Mailbox and Doorbell interrupts ever triggered?
I'm writing some very bare metal multi-tasking code that manipulates the hardware on a Pi3.
Part of that is to initialise a frame buffer, and I'd like to avoid polling loops, where possible. (e.g. ...
0
votes
0answers
33 views
I can't get my raspberry pi to download the library files for Pixyusb2
So I'm trying to get a pixy camera to connect to my pi for a school project, and whenever I run this code
sudo apt-get install git libusb-1.0-0-dev g++ build-essential
I get this message
Reading ...
0
votes
0answers
236 views
What is ConnectionError Failed to establish a new connection: [Errno -2]?
I am running a 6 script and they are running at different timings using systemd service and timer. Each script access the same url at least once. When I check the log file of some scripts, they are ...
0
votes
0answers
25 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?
0
votes
1answer
116 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
...
