Questions tagged [pi-3b+]

Use for questions specific to the Raspberry Pi 3 Model B+

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Error E405 while trying to install discord.js with npm

I'm trying to host a Discord bot in my RPI3B+, but the required node.js package discord.js always fails to install. I've tried purging both NPM and Node.js, and i have upgraded my Raspbian using sudo ...
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20 views

Raspberry pi PiVPN Tap Configuration

I'm currently trying to set up a VPN server in the TAP configuration to allow clients joining to be able to see everything on the network and reference them as if the client was connected physically ...
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1answer
27 views

Desktop still present after removing LXDE?

I am experimenting with a RPI 3B in Kiosk mode. The RPI has a 480x320 LCD screen attached. The RPI is running Rasbian Buster image. The OS is fully patched. I have a Qt UI program that should be the ...
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1answer
12 views

Duplicate Audio input from USB

I am trying to duplicate my Line In over USB Sound Card. I have RPi 3 B+ and USB Sound Card with Line In. Currently I have an application for stream over IP the Line In audio of USB sound card. Now ...
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1answer
31 views

What problem does dphys-swapfile solve?

I have a RaspberryPi 3B rev 1.2. It has 1 GB of RAM. When I run my C++ compiler at -j 2 or above I catch intermittent Out Of Memory (OOM) kills. Sometimes the compiler is killed, other times other ...
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22 views

Can't connect waveshare hat to raspberry pi 3b via python3 to obtain gps

I'm stuck with my waveshare hat and it would be cool if you could help me. I would like to obtain the gps location. I'm a python beginner and tried to use some already written code from this websites:...
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1answer
45 views

Permission denied when running .exe in cmd on raspberry pi 3B+

I'm looking to run an exe file from the cmd of my raspberry pi but when I just put the path of the exe, I have : Bash: MyPath.exe: Permission denied I tried with sudo, but I have then: sudo: MyPath....
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21 views

Why i can't write OBD 2 value of a car to firebase?

Hello guys im having a problem sending a value to firebase here's the code that i use import obd connection = obd.OBD("/dev/ttyAMA0") while True: cmd1 = obd.commands.RPM response1 = ...
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37 views

How to convert hexadecimal value of OBD(On-Board Diagnostic) to a readable value

Hello guys im having a problem about the conversion of hexadecimal of obd2 of a car to readable value like vehicle speed which is in 'km/h' here's the code that i use import serial ser = serial....
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14 views

Sending command to the motor via python code while connecting by VNC wiever

We are making a project. Our python codes are in the raspberry. When raspberry is connected to the monitor via HDMI, we can directly give a command to our motors by using our python code and it works ...
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1answer
31 views

3B+ Not Booting

I've had my Raspberry Pi 3B+ for a while now (a couple of months, maybe) and it has always booted just fine, up until this week. I was using the RPi to host my Discord Bot, but now it doesn't seem to ...
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31 views

upload GPS real time data to web browser with wifi [closed]

i am doing a project for my collage. The objective of this project is to collect real time GPS data and displaying the data on a web server, i am now able to run the program on Arduino IDE to get the ...
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2answers
38 views

Powering the Raspberry 3 B+ with PSU

I have a PSU from Amazon that provides 5V and I used my trusty multimeter to adjust the voltage to exactly 5.0V. I used it previously to run some silent fans, but I don't have any use for that anymore ...
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0answers
43 views

Raspberry Pi 3B+ shuts down by itself

I’m not well versed enough in Linux to know where to start troubleshooting quite yet, but here’s the situation. I’ve got a fresh install of Raspbian w/ Desktop on my Raspberry Pi and have it ...
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0answers
40 views

Connect with VNC to RPI 3B+ via Bluetooth

I want to do VNC via Bluetooth between my Raspberry pi 3b+ and an android phone. Some forums say that bluetooth technology is so slow to connect VNC via a DUN network, but I was doing some research ...
1
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1answer
24 views

Turn on tv using cec-client on RPi3

Running latest Libreelec with latest Kodi on RPi3. I can successfully turn off the tv using: echo "standby 0" | cec-client RPI -s -d 1 and echo "tx 10:36" | cec-client RPI -s -d 4 But turning ...
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1answer
64 views

can the MCP23S17 address pin be ignored?

I am planning on using the MCP23S17 port expander for my use case but upon wiring them up , it would seem that the MCP23S17 which is the SPI version of the port expander has address pins which is ...
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1answer
24 views

Boinc Headless + Computing Preferences. It's possible?

I'm running boinc-client (headless) with some projects attached over my pi-3b+ I don't seem to find where I could configure the Computing Preferences (cpu/core % usage, ram usage, etc) that usually ...
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24 views

Pi does not find NOOBS files

My Raspberry Pi is not finding the NOOBS files. I have tried to make the SD card bootable, but it did not get me as far as if I just unzipped NOOBS on to the Sd card. The screen is blank. Any ...
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29 views

Using expect for authentication

I have installed the Nordvpn linux app After using it for some days I have realised I need to login again sometimes. Login is done by the command and the response is: root@root:~ $ nordvpn login ...
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0answers
11 views

Raspberry Pi3 B+ Windows IoT does not boot

I am using Raspberry Pi3 Model B+ embedded card and I am trying to flash Windows IoT core. I had some issues with it while it does not boot. I followed the steps described here and used RaspberryPi ...
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1answer
54 views

Raspberry pi 3B+ vs Raspberry pi 4

what are pro and cons of Raspberry pi 3B+ vs Raspberry pi 4 ? For a new beginner like me which one to start with either Raspberry pi 3B+ or Raspberry pi 4 ? Thanks in Advance!!!
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1answer
50 views

Is this a new RPi 3B revision?

I recently purchased a Raspberry Pi 3B board, but comparing it to other units I have seems somewhat different. It has the processor of the 3B+ model, the BCM2837B0, instead of the BCM2837 of 3B model. ...
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0answers
10 views

Mini usb 2.0 microphone not detected

I googled but didnt find an answer. I bought usb microphone like this: https://www.ebay.com/itm/USB-2-0-Mini-Mikrofon-Stecker-f-r-Windows-PC-Mac-Linux-Raspberry-Pi-Mikrophon/112352215940?pageci=...
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3answers
92 views

GPIO vs I2C SMBUS2

This example scans for any I2C slave address current on the I2C bus. (I am using a RPi 3B+ with raspbian buster from september release) Script trial_smbus.py: from smbus2 import SMBus channel = 1 ...
2
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1answer
33 views

4 Displays with diffrent output using Raspberry Pis

Core Problem: I need 4 displays to show diffrent output (simple images) For this kind of "Video Wall" problem, most solutions recommend one RPi for each display/monitor in a master/slave ...
2
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1answer
80 views

Raspberry Pi 3 B+ (Buster) can't control Dynamixel AX-12A with Raspberry Pi 3 B+ (Buster) with half duplex communication

I have a project to make mobile robot with Dynamixel AX-12A as the wheel, so i changes the AX-12A to Wheel Mode with CM-530 and it works well. I follow the guide from http://www.oppedijk.com/robotics/...
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0answers
22 views

Rainbow screen issue with raspberry pi 3 model b+

I am using Raspberry pi 3 Model B+ and using Ubuntu Mate operating system not Raspbian Os I am also using raspberry pi 3 supportable original charger of 5.1V 2.5A. still i am facing the same rainbow ...
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0answers
34 views

How to create a person or head (not face) detection using open CV that are not too slow when run in Raspberry Pi 3B+?

Hello guys my problem is creating a program that can detect the head(not face) or human detection for my project One of the program that i see is too slow for raspberry pi 3B+ which is this : https:/...
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45 views

Raspberry Pi 3B+ successfully connect and pair but can't receive data from OBD II

Hello guys my problem is i cant recieve any data from OBD II to Raspberry Pi 3B+ Here the materials that i use: Raspberry pi 3B+ ELM327 -> OBD II Operating System of Raspberry Pi -> https://medium....
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1answer
108 views

Low wifi speed even with 5Ghz wifi adapter

My internet download speed from my D-Link wifi router is 24 M bits/s From ethernet the download speed is 50 Mbits/s I am using Tp-link AC600 Archer T2U Plus wifi adapter with Rapberry pi 3B+ I ...
1
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1answer
60 views

howto config network interfaces in Raspbian after config files change

I cannot find a way to start network interfaces with proper config after I changed config files (eg dhcpcd.conf). The only way I found to take the new config into account is to reboot. There must be ...
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2answers
58 views

How to send email from Pi using python without smtplib?

I am new in Raspberry Pi and I am trying to send mails without using SMTP. I had used SMTP before and it worked perfectly fine. But recently the same code is not working, though it compiles without ...
0
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1answer
45 views

ImportError:python2.7/dist-packages/RPIO-2.0: undefined symbol: makedev

I have a problem with RPIO. I am running a face recognition using OpenCV python on Raspberry Pi 3B+. pi@raspberrypi:~/facerec-pi/code $ sudo python capture-positives.py Tradeback (most recent ...
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0answers
45 views

How do I read all registers of an INA219 sensor via SMBus in Python at once?

I'm trying to Connect my Raspberry Pi 3B+ with a Raspbian 10 to an INA219 current sensor (that also returns voltage and a premultiplied power) via SMBus in Python 3.7. After destroying one Raspberry ...
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0answers
47 views

Raspberry pi with 1.3" oled i2c screen

I'm currently trying to use this 1.3" i2c oled screen with the Adafruit oled i2c library, but I'm currently getting this issue: I have made sure to run the setup.py and all of the code is the same. ...
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0answers
37 views

How to split a display into many and access all the screen

I'm trying to split the screen in raspberry-pi. and access each screen for each display I want the multiple layer in a single screen. Eg. my output screen resolution is 1024x720 in that i have to ...
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2answers
52 views

Raspberry Pi 3 B+ won't boot up after 1 week of use

So I just got a new raspberry pi 3 b+ earlier this week by RS Components and I got it working on the first day. A couple days I shut it down and later when I tried to turn it back on, it didn't all it ...
2
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2answers
42 views

Raspberry Pi getting burningly hot and not displaying

I tried turning on my raspberry pi 3 b+ and it wouldn't show anything to my TV, the entire Pi ( mainly around the SD card ) was so hot I could barely touch it. Bare in mind the pi was only on for ...
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1answer
28 views

After my script crashes, I can't run any more scripts, RP 3 Model B+

I am running a script that is probably crashing. When I run it, nothing seems to happen, so I hit Ctrl + Z to halt the program. But then I can't run any other script on the Raspberry Pi 3 Model B+. ...
1
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1answer
47 views

When I make a clone of my SD, the resulting image has ethernet problems

First of all, I'm working with Ubuntu Server 18.04, on a Raspberry Pi 3b+. I'm running a server with Nodejs and MongoDB. Everything works perfect. The problem comes when I want to clone the SD into ...
1
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1answer
52 views

RPI not booting, only red LED, not the SD card

My RPI 3B+ won't boot up anymore. Only the red LED lights up, the green one remains off. I use the official power supply, and my SD card is not corrupted. My SD card realy isn't the problem: I tried ...
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0answers
26 views

Timed trigger for GPIO input

I'm running a raspberry pi system that records fish as they swim passed an IR break beam sensor at a fish ladder. So far the system works well but I'm trying to cut down some of the false triggers. ...
0
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1answer
23 views

Using pigpios waves and audio output

I am using a Raspberry Pi 3 B+. I want to play audio through the 3.5mm jack and use PWM at the same time or successively to simulate a IR-Remote. I know that you can't use the hardware PWM while ...
3
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1answer
38 views

Won't mount btrfs file system unless you try to mount each disk separately

I have a pi 3b running raspbian 10, installed fresh this morning. All was going well until it ceased to be able to mount my btrfs volume. The error I get is as follows: mount: /drive: wrong fs type, ...
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0answers
15 views

Restarting another python script that is running from a running python script

I know that os.execl(sys.executable, sys.executable, *sys.argv) restarts the current running python script. But what if I have two scripts that are running and under certain conditions, the main ...
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0answers
56 views

RF ISM 433MHz Module Using Rpi RadioHead Low Speed Problem

I have a rf module 433Mhz which consist of a transmitter and a receiver, I used virtualwire and Radiohead library in Arduino and it's pretty fast. When I shifted that to rpi there were no dedicated ...
2
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2answers
92 views

How to automatically rerun python script if error occurs

I have python script which ideally runs indefinitely in loop. I am catching some exceptions, however, the problem is when some error occurs and script stops because of error. I want to detect somehow ...
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0answers
11 views

rp3 can't boot openelec

I am using rp3 and trying to install openelec from here and using the second one for rp2 and 3 I tried to format the sd card to fat32 Tried to copy the image after extraction using dd Tried using ...
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2answers
31 views

Is L293DNE Dual H-Bridge Motor Driver Chip/Board also a 5V voltage regulator/converter to power the Raspberry Pi itself?

Have been reading many articles showing how to connect DC motors to the Raspberry Pi and of course a DC Motor Driver Chip/Board is needed to come between DC motors and the Raspberry Pi GPIO Pins to be ...