Questions tagged [pi-3]

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

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0answers
21 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 ...
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2answers
25 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 ...
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20 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 ...
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1answer
42 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 ...
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0answers
17 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" ...
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1answer
30 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 ...
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0answers
26 views

Raspberry pi 3 gtk window [closed]

I get these errors when I say run the codes I wrote in gtk window. Can you help? for distance measurement using the hcsr-04
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0answers
23 views

Can not reach my RPI 3 B from Windows [closed]

I need to solve this strange problem. I can't reach my raspberry from windows 10, ping goes ko, but I can perfectly reach it from any other device in the same local network. I have just setted my ...
0
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1answer
43 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
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1answer
56 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
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1answer
14 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
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1answer
53 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 ...
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1answer
35 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 ...
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0answers
26 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 ...
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0answers
25 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 ...
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1answer
22 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://...
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1answer
188 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 ...
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0answers
22 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
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1answer
27 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
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1answer
44 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 ...
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0answers
13 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
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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. ...
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0answers
33 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 ...
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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 ...
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0answers
31 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 &...
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2answers
37 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
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1answer
20 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 ...
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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.
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0answers
53 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 ...
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0answers
123 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 ...
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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
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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
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1answer
81 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 ...
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0answers
56 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
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1answer
44 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. ...
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0answers
28 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 ...
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0answers
119 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 ...
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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
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1answer
79 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 ...
0
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1answer
44 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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0answers
21 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 ...
0
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1answer
180 views

Self Hosting Raspberry Pi for Discord Bot [closed]

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 ...
1
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0answers
83 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
47 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 ...
0
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1answer
52 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 ...
1
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0answers
261 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 ...
0
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1answer
27 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 ...
0
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0answers
37 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 ...
1
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2answers
134 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 ...
0
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1answer
64 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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