Questions tagged [pi-3b+]
Use for questions specific to the Raspberry Pi 3 Model B+
432
questions with no upvoted or accepted answers
3
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0
answers
812
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 ...
- 149
3
votes
0
answers
1k
views
uv4l usb camera stream not working
I am using a raspberry pi 3b+, trying to make the usb camera work with uv4l streaming.
These are the packages I've installed:
uv4l uv4l-raspicam uv4l-raspicam-extras uv4l-server uv4l-uvc uv4l-...
- 31
3
votes
0
answers
578
views
webcam issue after UV4L installation
I am trying to make a usb webcam work on my rpi but it drives my nuts.
I have Rpi 3 model B+
Also I've downloaded the newest raspbian image (stretch with desktop and recommended software). It's ...
- 131
3
votes
2
answers
1k
views
Keyboard and mouse don't work in GUI
I've tried to include as much information as possible, but if it isn't relevant I will remove it.
I purchased a Raspberry Pi 4 months ago, and I've been using it to run some CRON jobs. I have a ...
- 130
3
votes
0
answers
101
views
Google assistant on RaspberryPi3
I need help as I am stuck doing a project. I followed the tutorial on google developers website " https://developers.google.com/assistant/sdk/guides/library/python/extend/install-hardware" and got the ...
- 31
3
votes
0
answers
631
views
Bare Metal RPI 3B UART not working
I have referred many tutorials to get UART working in bare metal environment on RPI 3.
https://github.com/dwelch67/raspberrypi/tree/master/uart05
https://github.com/mrvn/RaspberryPi-baremetal/tree/...
- 61
3
votes
0
answers
191
views
Are the camera and display connectors of my 3B+ soldered the wrong way around?
I recently purchased a new 3B+ board and although the board board itself is working fine, I can't get the PiNoir camera to work.
The camera works fine on an another 3B board.
I tried several tricks on ...
- 131
3
votes
0
answers
816
views
Accelerated Numpy on Pi 3 B+
I'm looking to do some work with NumPy on my Pi 3 B+, and I'm not sure what the deal is with optimization, blas, etc.
I installed libatlas using:
sudo apt-get install libatlas-base-dev
Following ...
- 131
3
votes
1
answer
684
views
Which Linux driver does control the PMIC of the Raspberry Pi 3B+?
The Raspberry Pi 3B+ contains the MaxLinear (previously Exar) MxL7704 power management chip (PMIC) with I2C interface for "on-line" reconfiguration of power sequencing and internal voltages.1 This is ...
- 6,065
2
votes
0
answers
377
views
Poor performance with LXD/LXC. Extremely high CPU steal in the containers
I've got a pi 3 B+ running Raspbian 10. I installed LXD using a snap package.
There's two LXC containers running on my machine. One is an nginx reverse proxy and the other is running pihole.
Both ...
- 121
2
votes
0
answers
632
views
Stream from USB webcam to rpi3+ hdmi screen
I'm looking for something I think should be simple, but haven't been able to find any resource that shows how to do it.
I have a USB webcam attached to my PI 3+. I also have a monitor attached to the ...
- 121
2
votes
0
answers
96
views
rPi 3B+ boots with no activity light or ethernet
I’ve been using a 3B+ headless for several months. Yesterday I rebooted like I normally do using sudo shutdown -r now. It shut down, but wouldn’t boot up again. I figured I had done something to the ...
- 185
2
votes
1
answer
2k
views
Pi Hole suddenly stopped working
I've been running pi hole on the raspberry pi 3 B+ continuously for a few weeks now. Everything worked great but all of a sudden it stops working.
My devices don't connect to the internet as if they'...
- 21
2
votes
0
answers
103
views
Raspberry Pi OpenVPN connects, but no internet access
I am trying to make a VPN to my Raspberry Pi 3 B. I followed this video and installed OpenVPN in order to do it. I did the dynamic DNS thing and also port forwarded port 443 because I chose TCP since ...
2
votes
0
answers
25
views
Button hardware for RPI
I have the following circuit:
I am wondering if this configuration will work if I'm trying to add buttons.
I wanted to set them up as GPIO=GPIO.PUD_DOWN and to have it activate on the rising edge, ...
- 99
2
votes
0
answers
242
views
Raspberry pi 3b+; buster touch events
I am a beginner with the raspberry pi and trying to get my hands dirty on RPi 3b+, OS- Buster, 7 inch HDMI- touch screen.
I am trying to build simple gui with one button and one label to display a ...
- 21
2
votes
0
answers
270
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 ...
- 405
2
votes
1
answer
1k
views
systemd-networkd: Bond Ethernet and Wifi (USB Dongle), AP with Raspi 3b+ on board Wifi
Raspbian Buster Lite, Raspi 3b+
I want to bond ethernet (eth0) and a USB wifi dongle (wlan1) for network/internet access. This part I've managed with success, dynamic failover works perfectly.
The ...
- 41
2
votes
0
answers
136
views
Touchscreen calibration: touchscreen does not cover full display
I have purchased an industrial touchscreen monitor that supports Linux through PenMount drivers. The VGA video output (via HDMI adapter) works perfectly, and the USB touchscreen is perfectly ...
- 21
2
votes
0
answers
65
views
Powwering Raspberry pi 3 with Li-ion battery
I use MT3608 boost converter in order to convert Li-ion voltage to 5V for RPI, but when I connect battery, RPI doesn't boot up. When I check output of MT3608 it is 5V but it can't tolerate peak ...
- 21
2
votes
0
answers
187
views
Configure AlexaPi to use bluetooth speaker connected to my Raspberry Pi 3B+
I am trying to clone Alexa on my RaspberryPi 3B+. Following are the links which I am following.
https://github.com/alexa-pi/AlexaPi
https://github.com/alexa-pi/AlexaPi/wiki/Installation
I have done ...
2
votes
0
answers
228
views
Dropped wifi packets from Pi Zero W to Pi 3B+
We're trying to build a system where a master Pi 3B+ controls a dozen (or more) Pi Zero W clients - all running the latest raspbian (as of 18:00 EDT today) - in an isolated WiFi island (no ...
- 21
2
votes
0
answers
111
views
Image rollback using Raspberry Pi Bootloader
I'm using Yocto framework based RPi build and have created My SD card partition as follows,
======================== SD card with 3 parts ========================
| 68MB(bootloader) | 4GB(...
- 21
2
votes
0
answers
5k
views
Raspberry Pi 3 B+ - Error: Driver 'sdhost-bcm2835 is already registered, aborting. What is that and how to solve it?
I have a Raspberry Pi 3 B+ and a microSD 64GB.
I am going trough the boot process following this video.
This is what I have:
MicroSD card 64Gb (it is working) formated to FAT32 using MiniTool ...
- 133
2
votes
0
answers
736
views
Install Windows 10 IoT on 3B+?
I bought a 3B+ a few months back and have been experimenting with it with Raspbian, but I recently discovered it is possible to run Windows 10 IoT on it and since I am mainly a C# developer, I want ...
- 121
2
votes
0
answers
2k
views
Disable mouse acceleration on Raspbian Stretch
I can't figure out how to change the mouse acceleration setting such that the change is persistent. Changing the value in the Preferences > Keyboard and mouse settings keeps resetting every time I ...
2
votes
0
answers
662
views
BLE Connect fails with page timeout
I've got a custom BLE 4.1 device and I'm trying to connect it to Raspberry PI 3 B+ using hcitool, gatttool, bluetoothctl, ..., without success.
The device is an NRF BLE chip with the Nordic UART ...
- 121
2
votes
0
answers
185
views
How can I force the Pi to wake a monitor
This question is not specifically a Pi question, but about how to FORCE the Pi hdmi to wake my monitor from sleep, which seems to be a seems to be specific to the Pi hardware, although it may be a ...
- 54.3k
2
votes
1
answer
1k
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 ...
- 31
1
vote
0
answers
23
views
Incorrect values coming from 4-20mA ADC receiver
This is what I have.
Raspberry Pi3
i2c shield. https://store.ncd.io/product/i2c-shield-for-raspberry-pi-3-pi2-with-outward-facing-i2c-port-terminates-over-hdmi-port/
1-Channel 4-20mA Current Loop ...
- 111
1
vote
0
answers
12
views
Can I use overlay filesystem on an expanded filesystem?
I've used raspi-config to activate overlay filesystem and made the boot partition read only. As I was running out of space I decided to use raspi-config to expand the filesystem to fill the entire SD....
- 11
1
vote
0
answers
45
views
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 ...
- 11
1
vote
0
answers
59
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-...
- 11
1
vote
2
answers
336
views
Controlling WS2812b LED strip produces inconsistent and uncontrollable output
Background
I'm trying to control a single WS2812b LED strip from a Raspberry Pi. I've followed this tutorial from raspberrypi.com (with the exception of Prep & Installation step 4, because I ...
- 121
1
vote
0
answers
42
views
heartbeat sensor for pi
i want to measure the heartbeat using the pulse sensor. i connected the pulse sensor to a mcp3008 adc and the pi.
this is the code i used
from pulsesensor import Pulsesensor
import time
p = ...
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 ...
- 108
1
vote
0
answers
302
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 ...
- 131
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:...
- 151
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 ...
- 11
1
vote
2
answers
538
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), ...
- 141
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 ...
- 31
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 ? ...
- 11
1
vote
0
answers
57
views
Can iptables be used to monitor a specific host and port without being a gateway or access point?
I have a Pi 3B+ that I want to use to monitor traffic forwarded from the router to another host (and a specific port) on the network.
I am currently using the ethernet interface on the Pi to connect ...
- 31
1
vote
0
answers
615
views
Connect LTE modem to RPi with systemd-networkd networking
I have a rpi3b+ running latest os as headless with everything up to date and I use systemd-networkd for networking on it. I'm trying to connect a LTE usb modem to it for wan access. For that I use ...
- 11
1
vote
0
answers
27
views
Cannot change individiual core frequency on Raspberry with cpufreq-set
I used to use cpufreq-set to change the cores' frequency individually on my RPi 3B+, but I noticed that recently I cannot do it anymore. The effect of:
sudo cpufreq-set -c 2 -f 1400000
is the change ...
- 11
1
vote
0
answers
62
views
Problems with Huawei me909u521 modem in Raspberry Pi 3 b+
I have the Huawei me909u521 modem attached to RPi 3 b+ via sixfab LTE hat (connected by GPIO).
The Rpi is detecting the modem:
pi@raspberrypi:~$ lsusb
Bus 001 Device 004: ID 12d1:1573 Huawei ...
- 111
1
vote
0
answers
360
views
pip install fbprophet
Can the facebook time series algorithm called prophet be installed on a rasp pi?
It requires pystan (I think its Cython) and my B+ pi upgraded to Buster fails on the install with pip
Im also noticing ...
- 215
1
vote
0
answers
184
views
DS18B20 stopped recently
I have read a few posts here on my issue, notably DS18B20 not detected by Raspberry Pi, but unfortunately none of the suggestions worked for my issue. I am seeking advice on additional troubleshooting ...
- 109
1
vote
0
answers
45
views
Access Point and NodeJS frontend
I have set up a wireless access point with my RPi 3 B+ as per the official instructions on the RapberryPi website, and that works well. I can connect to the internet via my RPi access point.
I would ...
- 111
1
vote
2
answers
2k
views
BlueZ BTGATT-client.py WriteValue
I had a successful attempts with BlueZ-5.50 > test > example-gatt-client.py with ESP32 set as HeartRate Sensor Server.I am able to read from ESP32 which i modified to suit the BlueZ example.
...
