Questions tagged [pi-3b+]

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

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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 ...
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  • 149
3 votes
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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-...
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  • 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 ...
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  • 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 ...
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  • 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 ...
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  • 31
3 votes
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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/...
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  • 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 ...
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  • 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 ...
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  • 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 ...
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  • 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 ...
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  • 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 ...
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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 ...
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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'...
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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 ...
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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, ...
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  • 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 ...
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  • 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 ...
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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 ...
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  • 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 ...
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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 ...
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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 ...
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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 ...
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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(...
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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 ...
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  • 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 ...
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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 ...
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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 ...
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  • 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 ...
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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 ...
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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 ...
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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....
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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 ...
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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-...
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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 ...
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  • 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 = ...
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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
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 ...
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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
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
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), ...
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  • 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 ...
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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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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 ...
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  • 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 ...
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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 ...
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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 ...
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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 ...
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  • 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 ...
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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 ...
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  • 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. ...
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