Questions tagged [pi-3b+]

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

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How can I interpret this GPIO Alt-Modes?

I have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. I analysed the alt Modes ...
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bluetooth network traffic monitoring

Is there anything that I can use to monitor my Bluetooth traffic just like the resource monitor in windows? I encounter nethogs in raspi but it only monitors wifi network. I want to know the B/sec of ...
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How can I read the current ALT-Mode of a GPIO PIN?

i have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. Out of personal Interest, ...
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41 views

Raspberry Pi 3B+ board SMT component identification

i'm a college student so i cheaped out by buying a physically damaged RPi 3B+ planning to repair it myself (also as SMT soldering practice) but am having some difficulty identifying the damaged parts. ...
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how can i access the GUI through putty ssh

i can't find any answers on google and have resorted to here for answers
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Are Waveshare 2-CH_RS232_HAT stackable?

Is it possible to stack the Waveshare 2-CH_RS232_HAT? This is a link to the wiki page: https://www.waveshare.com/wiki/2-CH_RS232_HAT. The hat is driven via SPI, the interrupt pin can be chosen, there ...
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Connecting Raspberry Pi to Two HC-05

I am working on a project that requires me to use a Raspberry Pi 3B+ to read frequently published (< .1 sec) data from two HC-05 devices and write that data to a file. Is this possible or do I have ...
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Raspberry PI 3 b+: network disconnect frequently

I have been using 5 rpi 3 b+ on Raspberry pi OS, it works well but I have observed that the network drops after a day operation and network stays are disconnected till rpi is restarted to establish ...
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I2C OTHER PINS IN RASPERRY PI FOR I2C LCD

I am planning to put a power button on my raspberry pi 3b+ which uses the PIN 5 in order for me to shut it down and turn it on again when I wanted to. However, pin 5 is I2C CLOCK which is used for the ...
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reading two webcams in opencv

If I run this code on a PC with two webcams attached it runs fast (or fast enough) without any issues: import cv2 cap0 = cv2.VideoCapture(0) cap1 = cv2.VideoCapture(1) while True: ret0, img0 = ...
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Docker image - armv7 - Python Alpine 3.6

Using docker on a PI3, I need to rebuild an image which uses Alpine 3.6 - but I get an error. The URL is fine, but when a CURL it, it shows a redirect. I've tried 3.9 and 3.10 as well, but I believe I ...
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Python script stops mysteriously after a few hours

The Problem I have a raspberry pi 3b+ running a python 3.7 script that is controlling an arduino. The arduino is reading values in from a few different sensors, and sending the data back to the python ...
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Monitoring power consumption of a Raspberry Pi 3B+ device

I am wondering if it is possible to measure the power being consumed by the CPU core (ARM chip) of a Raspberry Pi? Specifically, I want to monitor this power consumption for various applications that ...
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Raspberry Pi 3+ throttled when connected to atlas sensors and LCD

I want to make a hydroponic nutrient monitoring system, so I bought atlas scientific sensors for my project. There are 3 types of atlas sensors and LCD 20x04 that are connected to my raspberry pi 3B+. ...
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Raspberry PI not visible on windows explorer

I use a raspberry pi(3b+) for home assistant. It ran a few weeks good, but suddently it didn't work anymore. Now i can not even anymore access the raspberry pi through windows explorer. Does anybody ...
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How to set up GPSD for a USB GPS/IRNSS receiver?

I am using a Raspberry Pi 3B with a Quectel L89 EVB kit (the receiver). The receiver is connected to the Pi through the USB port. The pi Identifies the connected receiver at ttyUSB0. I'm able to see ...
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Using the Dynamic Device Tree to add Overlays at Run Time

I am working on a couple of ideas for device tree overlays for the RPi 3B+ & 4B. It will be useful in my testing to be able to load and unload overlays without having to reboot each time. As ...
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How do I rotate LCD touch panel on a Raspberry Pi 3?

I know this question has been asked many times, but I can't find a solution that works anywhere to rotate the official raspberry pi touch screen (not the display part as this is working, just the ...
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3 answers
95 views

Rpi3B+ ssh session drops randomly

I have a Raspberry Pi 3 Model B Plus Rev 1.3 in my Ethernet network that runs headless with octoprint and an arduino pro mini connected to it via i2c. Wifi is disabled. The Rpi is powered from an ...
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1 answer
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Odd SPI issue only works when toggled

I'm running a pi 3b+ and I'm having a weird issue with SPI. I have a breadboard with an mcp3008 chip, and a potentiometer connected to it. I can get voltage values some of the time. I either have to ...
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I2C slave fifo sync issue

For testing purposes of my firmware of an ESP32 I would like to simulate the sensor it's communicating with through I2C. Therefore I'm trying to setup my Raspberry Pi 3B+ as an I2C Slave So it could ...
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'Firmware 1.05' text lingers via HDMI

Raspberry Pi 3B running Retropi (v4.7.21) inside a PiBoy DMG (firmware v1.05) When I connect this to my monitor via HDMI, it opens with the usual white ExperimentalPi splash screen, which is where '...
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Can I run two python script using the same pi camera in raspberry pi?

I am currently working on a project where I need to have a live stream video and a motion detection that when a motion is detected, records a 10 second video. I have put each functionality in ...
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2 votes
3 answers
64 views

Haunted House - ceiling fan triggering pi button

I have a raspberry pi 3b+ and a haunted house. My raspberry pi sits in the living room tv cabinet (with adequate ventilation) as a server. I had a large button lying around, so i put it inside a small ...
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PiCan 2 Data Logging on higher frequency problem

I have a project that logs data from a vechicle's OBD 2 port (using PiCan2 on top of RPi3B) and combines that data with data from sensors connected to an external Arduino. The Arduino communicates ...
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Youtube on Raspbian OS

I am trying to install Youtube on a Rpi 3b+ but I get the fake apps (like Youtubuddy).Can I install Youtube on a Raspberry pi without running youtube in a browser ?
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Consistent Motor control - specifically 180 degrees

I am struggling to get my motors to perform the same on each run. The first time I run the program, they will perform the same movement about 8/10 times. The second time I start the program, the ...
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Additional SPI bus raspberry pi 3b+

I'm trying to read 2 devices from SPI bus nRF24 module and MAX31865. I read the MAX module constantly every second and need to read the nRF24 module from time to time in other binary, but when I just ...
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2 answers
51 views

Using multiple LDRs and capacitors with Raspberry Pi 3B +

I am pairing an LDR with a capacitor to to make a light sensing project by returning the value of the variable COUNT when the capacitor is charged. But when i do this with 2 or more LDRs the values of ...
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ADXL345 shows non-zero acceleration value when idle

I am using an ADXL345 accelerometer connected to a Raspberry Pi 3B+.I have written a python code to check the acceleration value. However, the accelerometer always shows a non-zero value for the x and ...
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Can't SSH into raspberry pi after being inactive for a while

Alright, so, I've recently set up the Raspbian OS on the raspberry pi 3b, and I can ssh into it normally. Although, if I leave the pi inactive for a while and don't do anything with it, I'm unable to ...
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2 votes
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3 12V DC motors on raspberry pi with L298N

Completely new to this stuff. For context, I am trying to connect 3 DC motors that probably are 12v. I haven't bought them yet, they will definitely be more than 5v. I want to be able to control all ...
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Rpi 3B+ Clam Antivirus hanging

Whenever I launch "Clam Antivirus" in my Raspberry pi 3B+ , it starts hanging when I click any button . How to scan files without hanging ?
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1 answer
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Issue after a few hours of correct operations over wifi shared between an access point and a wifi client

I have a Raspberry Pi 3B+ running Raspbian 32 bit. It runs correctly as an access point and a wifi client over the integrated wifi. It does not use systemd-kerneld. I followed the different steps ...
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raspberrypi kernel: [14247.511414] mmc0: timeout waiting for hardware interrupt

Setup = Rpi > USB HUB > USB TTL adapter/cable > 2 LTE modules. Protocol = AT Commands. Problem = mmc0: timeout waiting for hardware interrupt. Question = Any investigation method and ...
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InValid CAN packets Observed RPI 3B+

RPI 3B+ connected with HAT consisting of CAN Transceiver. CAN interface is enabled and configured and link is UP. I'm using bus.send(msg) and bus.recv() functions to transmit and receive can packets. ...
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1 answer
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SPI Communication between Raspberry Pi and Arduino questions

Basically the title, but I have been looking into SPI as I am working on a project that basically requires a Serial connection between a Raspberry Pi (as a master) and an Arduino (slave); I intended ...
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Unable to play HD video using vlc

I buid an image for Raspberry pi 3b+ using yocto project. While building it I have used VLC instead of OMXplayer for playing videos, and enabled the hardware acceleration using --enable-omxil --...
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Building the Kernel error

I was following the steps defined here https://www.raspberrypi.com/documentation/computers/linux_kernel.html#updating-your-kernel and when executing this command, I get the next errors: pi@...
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1 vote
2 answers
68 views

Component knocked off Raspberry Pi 3B+

I acquired a second hand Pi 3B+ today but unfortunately it had a loose component on the underside of the board (3 pad component beside the SD card slot) While trying to fix it with a soldering iron I ...
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-1 votes
1 answer
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raspberry pi wont boot (Act led blinking 4 times)

I have 2 raspberry`s (raspberry pi 3b+). One is working fine and well and if i want to turn on my other raspberry (with the same SD card what i used for the other) the ACT led is just blinking 4 times ...
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DS18B20 value change with its power

I bought 3 DS18B20 and I am trying to use them for my domotics. I have relilability issue depending on how I power the DS18B20. The gobal setup : 1 MeanWell DR-15-5 to power the Pi 1 Raspberry Pi 3 ...
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Building all kernel modules make the right ko file for KS8851 but not when make separately

I am trying to build the KS8851 spi module, when i use make -j4 -C linux ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules the KS8851_spi.ko and KS8851_common.ko are successfully built. But when I ...
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How can i read the actual time of the played Audio from VLC player?

i want to play a sound on my Raspberry over the VLC media player. I want to change between two songs, but dont want to restart the song from the beginning at 00:00.00. Instead i want to read the ...
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-1 votes
1 answer
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What mosfet should i use for controlling a 24V 48W RGB ledstrip with a Raspberry Pi?

I am trying to control multiple 24V RGBWW (6-vein) ledstrips with my raspberry pi 3b+. The ledstrip is 2 meter (24W p/m) long, and will be cut into 3 pieces. I want to control each piece (~67cm) ...
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1 vote
0 answers
50 views

Nextcloud Docker install on RPI unsuccessful

I'm trying to install NextCloud via Docker on my Raspberry Pi 4. I have one version up and running with self-signed SSL certificates, but for some reason I cannot update that one. Here the docker-...
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GPIO readout from Geiger Müller board is low when it clicks

I am using a RPI 3b and this board. I setup everything according to this guide. It's also my first RPI project so maybe I am missing something. The code I am running: import RPi.GPIO as GPIO GPIO....
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Raspberry pi 3B+ not booting using regulator

I am using a 12V 2A power adaptor** and to step down the voltage to 5V, using a voltage regulator LM2576-Adj. at the output of this regulator I do get 5.17V enough voltage which is required by ...
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0 votes
1 answer
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Drive a 24V relay with RPI3 B+

I need the RPI3 B+ GPIO to drive a 24V relay that turns on an AC resistive load. Update:I hope the block diagram I attached earlier is now showing. part numbers listed, but the mosfet is not working ...
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How to connect Sim800c development board to raspberry pi 3

i bought this development board Professional Small Size SIM800C GSM GPRS Module Quad-band Development Board Module Suitable for Raspberry Pi (blue & silver) https://www.amazon.it/dp/B07NVZ59JS/ref=...
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