Questions tagged [pi-3b+]
Use for questions specific to the Raspberry Pi 3 Model B+
724
questions
0
votes
0answers
19 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 = ...
0
votes
0answers
32 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....
0
votes
0answers
12 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 ...
0
votes
1answer
27 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 ...
1
vote
0answers
24 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 ...
1
vote
2answers
37 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 ...
1
vote
0answers
42 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 ...
3
votes
0answers
33 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
vote
1answer
21 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 ...
0
votes
1answer
61 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 ...
1
vote
0answers
16 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 ...
0
votes
0answers
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 ...
0
votes
0answers
27 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
...
0
votes
0answers
10 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 ...
1
vote
1answer
49 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!!!
0
votes
1answer
48 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. ...
0
votes
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=...
3
votes
3answers
81 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
votes
1answer
31 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 ...
1
vote
0answers
68 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/...
0
votes
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 ...
0
votes
0answers
32 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:/...
0
votes
0answers
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....
1
vote
1answer
102 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
vote
1answer
55 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 ...
1
vote
2answers
56 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
votes
1answer
39 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 ...
0
votes
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 ...
1
vote
0answers
45 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.
...
2
votes
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 ...
-2
votes
0answers
26 views
Why can't I get to the log-in screen?
An error just comes up stating that the password and username is default and needs to be updated. We can't make it into the initial setup. There's no space to type. What do I do?
1
vote
2answers
50 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
votes
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 ...
-1
votes
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
vote
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
vote
1answer
47 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 ...
0
votes
0answers
25 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
votes
1answer
20 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
votes
1answer
36 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, ...
0
votes
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 ...
0
votes
0answers
49 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
votes
2answers
89 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 ...
0
votes
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 ...
-2
votes
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 ...
1
vote
0answers
19 views
Unable to make RPi image through win32diskimager any solution? [closed]
The SD card with RPi OS is corrupted while trying to make a flashed card and I tried to create its image through Win32 disk imager. I keep getting I/O error while reading.
1
vote
0answers
31 views
How to debug headless WiFi connection?
I'm trying to run Raspberry Pi 3B+ in headless mode: I'm doing this by placing ssh and wpa_supplicant.conf files in the root of the boot SD card folder.
What I can do if something went wrong?
Is ...
0
votes
2answers
98 views
How can Rpi3B+ read the output of the 801s vibration sensor module?
Currently I'm trying to do a project using rpi 3b+ with 801s vibration sensor using this tutorial https://github.com/Shmoopty/rpi-appliance-monitor#notification-settings
I'm beginner with rpi and ...
2
votes
1answer
44 views
SSH works on eth but not wifi and other services do work always [closed]
So this is driving me crazy.
Basically my problem is that I can ssh to the pi if the ethernet cable is connected but not if disconnected.
It sounds like a typical network problem so far, but it is ...
0
votes
1answer
34 views
Different Boot behavior for cloned Pi
I am running a python script on my Pi 3 B+ and registered it in a crontab @reboot so it is executed when booting the system. On my development Pi everything works fine, but when I clone the SD-Card ...
0
votes
0answers
16 views
CompoundPI unidentified server problem
I am trying to use CompoundPI (https://compoundpi.readthedocs.io/en/release-0.4/quickstart.html) with two RPIs and an ubuntu client. CompoundPI connects multiple RPIs, that each of them has a picamera,...
