Questions tagged [pi-3b+]

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

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Raspberry Pi 3B+ XRDP Very Slow!

I have a Raspberry Pi 3B+ and I just installed xrdp on it. I wanted to do this so I can do some ROS projects. But just after using RDP to log in to the Pi, I was welcomed with a painfully slow desktop....
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1 answer
978 views

Battery Management System (BMS) [closed]

I'm making a UAV using raspberry pi and I understand that it does not require a complicated BMS since it won't have complicated circuitry. The only problem I'm facing right now is that of the BMS. I ...
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2 votes
3 answers
447 views

syslog and kern.log filling with: rc rc0: IR event FIFO is full!

I have a Pi that has recently developed a habit of maxing the SD card with syslog messages (somewhere in the hundreds per second) of the message: "Date/Time user kernel: [ 2257.432445] rc rc0: IR ...
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  • 105
1 vote
0 answers
68 views

How to use an Rpi (3B+) as a layer 3 bridge, wifi to eth0 connected printer with a static address, using proxyARP and seamless port forwarding?

I am quite new to networking, but have semi-successfully spent time experimenting with different, well documented approaches to using an Rpi to bridge wifi connection from the wlan0 interface to an ...
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  • 108
1 vote
4 answers
200 views

Temperature, Humidity and Weight monitoring for beehives using Raspberry Pi Zero [closed]

I'm new about Raspberry world.. I'm studying a way to implement a custom beehive monitoring system. I would like to make a premise: I'm studying to organize the project, I'm not yet implementing or ...
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  • 121
1 vote
1 answer
1k views

Can't see 5GHz wifi with a 3B+

I have some issues with 5 GHz wifi on my Pi 3B+, it won't discover 5 GHz networks but only 2.4 GHz. I have set the wifi country, try to force the connection with correct SSID / password on the ...
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1 vote
0 answers
300 views

My rfid-rc522 reader stops reading after some time, how can I debug it?

I'm using the reader below to read mifare cards (13.56mhz), I have an electron/node.js application for this. For some reason after an uncertain amount of time(shortest time I noticed was about 30 ...
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-1 votes
3 answers
229 views

How come my 5V relay is always switched on? How to fix it?

#Libraries import RPi.GPIO as GPIO import time #set GPIO Pins GPIO_TRIGGER = 18 GPIO_ECHO = 24 GPIO_IN = 21 #GPIO Mode (BOARD / BCM) GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) # To avoid ...
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0 votes
2 answers
605 views

raspberry pi and ultrasonic distance sensor HC-SR04

So I have my raspberry pi, I watched a YouTube tutorial on what to do. I copied absolutely everything but still, it's not working. The wiring is surely correct as it is copied from the video and the ...
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0 votes
0 answers
154 views

SIM800 shield as Internet provider

I've been using for a while a Huawei USB dongle as an Internet provider for my Raspberry Pi, which I have connected to my solar panels system at my country house (which doesn't have an accessible ...
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-2 votes
1 answer
61 views

Problem with GPIO PIN 4 (Physical pin 7)

I have a simple LED circuit. I want to connect 3 LEDs to 3 different GPIO pins 2,3 & 4 (GPIO numbering). Pins 2 and 3 works perfectly fine, but 4 wasn't working as expected. I disconnected all the ...
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0 answers
173 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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1 vote
0 answers
68 views

Turn off red light? Override read-only?

I wanna turn off the red light on my raspberry pi. I have searched and found that I should run this command: sudo sh -c "echo heartbeat >/sys/class/leds/led0/trigger" But I get "zsh:...
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1 vote
3 answers
59 views

Is it possible to reboot my pi3b+ after I have run sudo halt without unplugging it and replugging it back in? [duplicate]

Is it possible to reboot my pi3b+ after I have run sudo halt without unplugging it and replugging it back in? I do not like pulling the power out of the micro usb over and over as I do not want to ...
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0 votes
1 answer
114 views

Rx buffer overwrites Tx buffer in spidev xfer2

Coming here from electronics SE as it was suggested that I post here on this issue. The electronics SE post is here. I'm setting up a comms link between an STM32F407 MCU and the Pi3B+. The Pi is ...
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1 vote
3 answers
895 views

`aplay` and `espeak` cannot play audio on user that is not pi

I'm trying to test the audio through the headphone jack using aplay /usr/share/sounds/alsa/* on Rasbian 5.10.17 on a Raspberry Pi 3 B+. This works fine on the pi user, but not on root or another user ...
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  • 121
1 vote
1 answer
448 views

arecord no such file or directory error when running via cron

So I can run: arecord -d 9 -f S16_LE -c 1 -r44100 -t wav /home/pi/signal_9s.wav from terminal and it works as expected. It records for 9 seconds and saves to the signal_9s.wav file. However if I set ...
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0 votes
1 answer
153 views

Are there further ideas for a repair of a 3.3V -> 5V shorted pi?

I accidentally shorted my pi's (3 B+) 3.3V and 5V GPIO-Pins. I was curious how to repair it and found this helpful answer. So I reworked the pi as described: Removed the broken MXL7704-R3, soldered a ...
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0 votes
0 answers
50 views

Raspberry Pi 3 (Model B) Connected to WiFi but cannot load websites

Note: This question is NOT a copy of any others. I have a Raspberry Pi 3 (Model B) running Raspbian that is connected to my WiFi, but is not loading websites. I can still ping sites and that works ...
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1 vote
0 answers
110 views

NetworkManager Access point stops working after a few days

I have a raspberry pi configured as access point using network-manager. After a few days (4-7 days), the access point stops working, i can still see it, but not connect to it. It looks like the ...
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1 vote
2 answers
157 views

Pi WiFi access point routing broken with Overlay Filesystem

I've configured a Pi 3B+ to act as a WiFi access point using the excellent instructions here. When the Pi's ethernet is connected it gives WiFi clients access to the internet, and when the ethernet ...
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  • 111
0 votes
2 answers
101 views

RPi3 Watchdog monitoring a directory instead of a file

I have a C++ application that permanently runs on a Raspberry Pi 3 and might occasionally freeze. It writes logfiles using Boost log and a good indication of a freeze is the absence of logging output ...
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0 votes
1 answer
33 views

raspbian and raspberry pi 3B+ [closed]

does raspberry pi raspbian had inbuilt I2C driver? or does that depend on the pi board? I am using raspbian as a OS in Raspberry 3B+. but the thing is whenever I run the code it will either show that ...
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0 answers
24 views

How to get my pointer back in Raspberry Pi?

I've used my raspberry pi for a kiosk project. My partner get rid the mouse pointer for better interface convenience. Now, I want my pointer back because I want to do another project. What should I do?...
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0 votes
1 answer
28 views

Upgrade from a new Pi3 to a newer Pi4 caused error ssh: Could not resolve hostname

I was using a Raspberry Pi3 successfully connecting from Win10 PC with hostname (ssh pi@hostname). Ping hostname worked also. I took the Pi3 chip and placed it into a Pi4. IP address changed from 192....
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1 vote
2 answers
532 views

raspberry pi as gateway lan/wifi

I bought Raspberri Pi 4 and installed predefined OS on it (I am using it headless). Raspberry pi is not connected to internet. Now I need to do this: in RPI Lan port is connected computer (device), ...
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  • 141
0 votes
1 answer
455 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 ...
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1 vote
0 answers
109 views

What is the correct syntax for using GPIO input to trigger dtparam=act_led_trigger=gpio?

I have a GPS receiver connected to a Pi, with 1PPS input connected to GPIO4. This GPS module does not have a PPS or lock LED, so I would like to have it indicate with the activity LED. Based on the ...
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0 votes
1 answer
18 views

Connection Raspberry Pi and Mac using PyCharmEdu [duplicate]

I am a new Raspberry Pi user. I want to run my code that is written in MacBookPro, on Raspberry Pi. In other words, I write my code in my MacBookPro (by using PyCharmEdu ide) and run ıt on Raspberry ...
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0 answers
37 views

pi-frozen-in-termial

I was in my terminal, sudo installing apache2, and I clicked out to pause a video real quick. When I clicked back on the terminal I have a white terminal screen with nothing anywhere. It then popped ...
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0 votes
2 answers
365 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 ...
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  • 101
1 vote
1 answer
316 views

Cant install libnssutil3 on raspberry pi 3b+

i have a Raspberry pi 3b+ running the latest version of Retropie. and i have a kodi port installed on retropie. I also have installed a Netflix plugin but when i try to open any video of netflix i get ...
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  • 13
1 vote
1 answer
1k views

Cannot apt-get install, can't authenticate package [closed]

I'm at my wit's end trying to figure this out all night... searched google, stack, ubuntu, and raspberrypi forum a whole bunch, but just can't fix it. What I'm really trying to do is sudo apt-get ...
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  • 121
0 votes
0 answers
291 views

How to install latest ruby version in Raspberry Pi

I have a raspberry pi which has the latest raspbian os. If I install ruby in it using sudo apt-get install ruby-full, ruby 2.5 version is installed. I have another raspberry pi which is running the ...
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  • 372
1 vote
0 answers
80 views

How can i boot 3B+ without SD card holder from scratch

The problem is stable red light when powered up. I think SD car holder is broken. This happened suddenly a week ago. And it doesn't open anymore. Are there any way to open it without sd card holder ? ...
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0 votes
0 answers
130 views

Can't get sound on Raspberry Pi's 3.5mm audio jack

I've been asking this question everywhere. I've checked lot of resources, manuals, documentations out there. But couldn't get any sound out of my speaker. I tried the YouTube video tutorials also, but ...
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0 votes
1 answer
34 views

MATE desktop doesn't work correctly

So, I decided to install the KDE Plasma desktop and see how it would go. I installed it (all dependencies took up 1.3GB of storage) and tried it out, and didn't like it too much. It takes about ~100MB ...
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0 votes
0 answers
255 views

Visual Studio Code - output to "integrated Terminal" is corrupted / unreadable

the Unreadable text output from the 'integrated terminal' is shown below this line: xecutinga isk:C /+/++C a++ ltndv suinfc <ndc < tarrangb ulnd.... flnd. fngnhec. hlcchhflddy i am new to ...
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  • 26
0 votes
2 answers
452 views

Does terminating ssh connection, terminates the installation process too?

I’m running a raspberry pi 3b headless, thus I ssh into rpi from Mac terminal through Ethernet cable ip. I’m currently installing opencv but the terminal kinda not giving any response. If I close the ...
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  • 1
1 vote
1 answer
686 views

Running python 3.7 on miniconda on raspberry pi

I want to use python 3.7 in raspberry pi through miniconda but surfing, I got to know that miniconda provides python version upto 3.4. Some sources said to use berryconda, which I installed but still ...
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0 votes
0 answers
36 views

Is there a way for me to automate the file manager on my Raspberry pi 3B running Raspbian?

I am currently working on a project that edits photos of mine and then uploads those photos to a google site. I'm using Selenium to upload the photos to the portfolio site, and I have gotten all the ...
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0 votes
1 answer
741 views

Starting RPI GUI application at boot without desktop GUI and other functionalities

This is my first question here in forum. I have an RPi 3B+ with Raspbian OS installed in it with 16gb SD Card. I am developing a GUI application using PyQT. It's running just fine. I want it to start ...
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0 votes
1 answer
332 views

RPi PWM issues - (re)start results in oscillating pin

I'm building a sauna controlling mechanism, controlled by the Pi, using PWM and solid-state relays. Works fine, but after a while, the PWM breaks down. At this moment, when I run the program and the ...
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0 votes
1 answer
163 views

Turn on an LED with dimming and stay on

I want to start the LED gradually with dimming by using PWM. And then once at a ChangeDutyCycle(100) I want it to remain on GPIO.output(led, GPIO.HIGH). import RPi.GPIO as GPIO import time led = 17 ...
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  • 101
-1 votes
2 answers
55 views

Unable to get IP address of Raspberry pi to give remote desktop connection

I am trying to give my Raspberry pi 3 B+ remote access using my windows laptop. I have connected raspberry using a ethernet cable and gave wifi connection to laptop. Then I tried making a bridge ...
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0 votes
1 answer
62 views

Is this RPI 3 B+ fixable, overvoltage on usb micro

I cant identify the component that blew, any help idenitying it would be appreciated. Is it possible to replace it to save this rpi? desoldered from the pads exposed on the right of the usb micro port
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2 votes
1 answer
641 views

IQAudio DAC+ appears to be installed, but does not play audio. How to debug?

I recently installed an AudioIQ DAC+ device on my RPi3b+ running buster. Following the directions in the user guide, I was able to get to the point that the drivers are loaded and appear to run, but ...
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0 votes
1 answer
27 views

battery for B+ model?

Could one of these rechargeable battery packs work for a rasp pi B+? Klientool and BestBuy are some options I can packup locally, plus I like Klientools. Any tips greatly appreciated... Klientools ...
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  • 205
-1 votes
1 answer
152 views

Cannot Ping/ ssh over wifi

I have read several forums and have tried many solutions. I have a new raspberry pi 3 B+. Up to this point I have connected an ethernet cable to remote into my RPi. Now I am trying to use wifi and it ...
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  • 1
0 votes
1 answer
48 views

Scaling down the SPI0 clock value on RPi 3B+/4B

I have a custom STM32 MCU board that interfaces with an RPi 3B+ via the SPI protocol. The MCU (STM32F407) has its SPI peripheral clock set at 84MHz and is configured as a slave device. For reliable ...
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