Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [pi-3]

For questions that apply specifically to the Raspberry Pi Model 3 and not other/all models.

0
votes
0answers
20 views

spi/mcp3008 trouble with getting a reading from chip, all channels read 0 (zero)

Pi model: Pi 3 A+ Os: Raspbian GNU/Linux 9 (stretch) <- it's stretch lite SPI: On Loop back test: spi mode: 0x0 bits per word: 8 max speed: 500000 Hz (500 KHz) TX | FF FF FF FF FF FF 40 00 00 ...
0
votes
1answer
26 views

raspivid doesn't include b-frames

I'm streaming raw h264 using raspivid on Raspberry Pi 3 and PiCam v1 . However, even I set the h264 profile to main or high, stream only contains I and P frames. Here is the command that I use for ...
0
votes
0answers
21 views

Pi 3B, 2 Servos and 2 Ultrasonic sensors. Power Supply needed

So right now I have the following items in front of me: Raspberry Pi Model 3B The power cable / plug that comes with it 2x MG995 Servo motors (<- open short compact datasheet for voltage info) 2x ...
0
votes
1answer
42 views

Connecting Raspberry Pi 3 with Huawei Surfstick 372

I tried to connect my Raspberry Pi with the Huawei Surfstick. All the tutorials i watched so far didn't helped me. If i plug in the Surfstick the raspberry shows that it is associated with it and has ...
0
votes
1answer
16 views

Retropie boots to 640x480 resolution over HDMI

I flashed the latest Retropie image (4.4) and it boots with a resolution of 640x480 when connected over HDMI to my 4k TV. I used the correct Retropie image for my Pi 3. I confirmed the screen ...
0
votes
0answers
13 views

Raspberry Pi to Raspberry Pi (Host to Host) IPSec Tunnel

I neeed to create an IPSec tunnel from RPi1 to RPi2 as described in the diagram below: RPi1-------WLan0------Router(No internet connectivity - only LAN)------WLan0 ------RPi2 A few days ago I posted ...
1
vote
0answers
31 views

Run Raspberry Pi 3 as VPN access point with pi-hole

I've got my Raspberry Pi with Raspbian running as pi-hole, connected through Wi-Fi to OpenVPN with most of my devices, where it blocks ads. I'd like to set RPI as VPN access point without ...
0
votes
1answer
19 views

Can i use 5v 3amp. in Raspberry Pi3 B+ [duplicate]

i am using Raspberry Pi3 B+ and i am in a confusion that can i use 5 volt, 3 ampare adaptor in my Pi?
0
votes
1answer
30 views

Raspberry Pi 3 Prototyping Breadboard HAT

How do I get the pin connect on the board. I see how to plug it on top of my raspberry pi through the female pin connected that is attached to the hat. But how do I connect the raspberry pins to the ...
0
votes
0answers
9 views

Multiple delayed output from pi camera

I’m trying to create up to 4 delayed outputs from the pi camera. The length of the delay needs to be varied 15-60 seconds. Is there a way to buffer the cameras feed and use the same buffer for all the ...
0
votes
1answer
85 views

Is there a good simulator for Raspberry Pi

Sorry to ask this kind of question. Is there any good simulator for Raspberry Pi? because I need to learn more about the raspberry pi but my problem that I can't buy all the sensors such as ...
-1
votes
0answers
21 views

switch raspberry pi from client mode to access point mode without rebooting

i use this https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md tutorial to turn raspberry pi3 to an access point and also i write a script to hide the ssid and another ...
0
votes
0answers
11 views

RPi 3 can't find Windows PC hotspot

I am studying abroad for a month and need to be able to ssh into my pi. The hotel's WiFi won't allow my PC to ssh over their network, so I am trying to turn my laptop into a hotspot and connect the pi ...
1
vote
2answers
12 views

Fix boot to console from boot to desktop

I accidentally set it to boot to desktop (gui) instead of boot to console while fiddling with the settings. I don't have a gui installed. Now I cant access the pi over ssh to revert the settings on ...
0
votes
0answers
14 views

Thermal imaging

I was wondering if anyone knows of a thermal imaging app for either iOS or android, just purchased an p3 b+ and just trying to get a few things clarified befor I start her up, also any info on a ...
-1
votes
0answers
13 views

KNACRO 4-Channel DC 5V Relay Module - What is the 'com' that is on the GPIO side?

KNACRO 4-Channel DC 5V Relay Module 30A DC 30V/AC 250V connected to a Raspberry PI 3 B+. 3 channels will work but 1 won't. I'm assuming is a 3.3 vs 5v issue. It doesn't matter which 3 I use they all ...
0
votes
1answer
31 views

Cluster as individual Pi's

I have built a Pi cluster (4 boards) rather than using them as a "super computer" can I use the cluster as four individual boards? e.g. one as an Internet Dropout, one as a mail server, etc? Thanks ...
0
votes
0answers
20 views

My rotary encoder is missing pulses - what are some potential solutions?

I have a rotary encoder with a very high resolution (5000 pulses per rotation). I used what I believe to be a fairly optimized rotary pulse counter program written in C found here but the faster I ...
0
votes
0answers
19 views

How to auto power on SIM900A module with raspberry pi? [closed]

I have a SIM900A module .It is having a powerkey this needs to be pressed for 1 second to turn on i need to automate this process but I am not been able to find the power key pin in my evaluation ...
1
vote
3answers
64 views

How to choose a suitable display for pi 3 B+?

I'm currently looking for a display 5 inches or less for my PI, but there are a lot of information and since I'm quite new to the world of raspberry I'm looking for some help and guidance on where ...
0
votes
0answers
33 views

Cloned Raspi Zero W boots into Emergency Mode

I have a Raspi (3+) that for whatever reason I need to clone to use as a temporary backup for downtime later on. After realising the effort needed to recreate it from scratch, I cloned its entire SD ...
1
vote
1answer
24 views

Rapidly-fluctuating output when using rotary encoders with Raspberry Pi + Processing

I'm using a Raspberry Pi 3 with some Cylewet KY-040 rotary encoders that I bought from Amazon to set up an art installation with Processing 3. Pi is just running the stock Raspbian NOOBS. Right now, ...
0
votes
0answers
27 views

Just started with raspberry pi. Any help about where to start? [duplicate]

I just got two Raspberry pi's working today, (I installed raspian), and I really don't know where to learn. I bought a few books, but they only suggest projects, and not how to use the pi. Any help?
0
votes
0answers
41 views

The AM2302 Temp/Humidity Sensor return none value in Raspberry Pi 3 B+

I am using the AM2302 Temp/Humidity Sensor. I start with sudo apt-get update && sudo apt-get -y install git python-dev git clone https://github.com/adafruit/Adafruit_Python_DHT.git cd ...
-4
votes
0answers
33 views

I need help coding a toggle button for led? [duplicate]

I have hooked up my circuit and it works as a hold button to turn light on. Then when I let go of button light turns off but I have found no way to make a toggle button for led. If somebody were so ...
0
votes
1answer
61 views

trying to run 6 USB cameras simultaneously on a single Raspberry Pi 3B+ with add-on 4 port USB hub with external power

We are trying to simultaneously run 6 cameras on a Raspberry Pi 3B+ with an add-on 4 port USB hub that has an external power supply. The cameras are set at 15 FPS with a colour image size of 640 X 480....
0
votes
0answers
24 views

Raspberry Pi Green LED Always On

I was not able to find out why this error happens (repeatedly), please help me diagnose it. I have a Raspberry Pi 3 Model B, running Raspbian Stretch Lite (2018-11-13). It boots successfully. I can ...
0
votes
0answers
19 views

Cannot install install tensor flow on raspberry pi 3b

i am running into an error when i try to install tensor flow using pip on my raspberry pi 3b+. here is the error message: Command "/usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/...
0
votes
2answers
53 views

How to make a button toggle a led?

I have some code which turns an led on when I hold the button. But only when I am pressing it. Could somebody help me so when I press the button then the light stays on and if I press it again the led ...
0
votes
0answers
16 views

Pi3 won't boot Assertion 'str' failed at ../src/basic/utf8.c:195

I have an raspberry pI 3 that won't boot. The problem is probably the sd card since it works when I switch to another sd. During the boot screen the PI give me "Assertion 'str' failed at ../src/...
0
votes
2answers
32 views

Weird resolution

So, im new to the raspberry pi. When i first started it and installed the raspian os with noobs, it had fine resolution. But then i rebooted, and for some reason the noobs menu was in alright ...
0
votes
1answer
20 views

Need help blinking a led continuously?

I'm new to Python and just go this Raspberry Pi, and need help blinking this led. I have got it to where the LED will blink once( Turn on for a second, then turn off). I need some help so when I hit ...
0
votes
1answer
29 views

Ripped off display connector, raspberry not working anymore?

i am using a Raspi 3b v1.2. I ripped parts of my display connector off by accident and then removed the whole thing with pliers, because i will never use it anyways. Now my raspberry won't boot. Is a ...
0
votes
2answers
37 views

Is this Solenoid Connection Correct?

I'm new to this Raspberry Pi. I'm trying to build this project: https://www.hackster.io/hitherejoe/braillebox-braille-news-reader-e86060 But the circuit diagram in it: https://hackster.imgix.net/...
0
votes
0answers
30 views

installing openvpn on raspberry pi3

i try to create a free vpn client of raspberry pi 3 to hide my ip address when i connect to the internet.to do that i install an openvpn from vpnbook.com on my rasbian stretch OS. this is what i do: ...
0
votes
0answers
18 views

Disconnect RTC from systemd-timesyncd.service

I have an RPI3 with an added external RTC (Adafruit PiRTC - PCF8523). My system does not have consistent access to the internet, occasionally loses power, and is remote (in the field), so physical ...
1
vote
0answers
17 views

Setting up paging in raspberry pi 3 model B in 32 bit mode

I am trying to setup paging in rpi 3b in 32 bit mode. First of all I am aiming for identity mapping all kernel code, so I started with short descriptor format using 1 MB sections. Identity mapping ...
1
vote
1answer
36 views

How to start a systemd service as a non-root user?

I've been using qbittorrent-nox on a headless Raspberry Pi 3 B+. The setup was a breeze. But then I wanted to autostart qbittorrent after boot, so I wrote a systemd service unit and enabled it. It ...
3
votes
1answer
43 views

How can I install Mosquitto on a Raspberry Pi 3?

I have a Raspberry Pi 3 and I am struggling with installing Mosquitto. It seems to be caused by a bad mosquitto-jessie.list file: deb https://repo.mosquitto.org/debian jessie main It could not ...
0
votes
1answer
20 views

random reading by analog inputs of mcp3008

i ran the simpletest.py program for testing the mcp3008 and it is returning random values with 0 value at intervals to the pins left open and also to the pin getting input from MQ-9 sensor... can ...
0
votes
0answers
21 views

Raspberry pi randomly disconnects my wlan0 but keeps working through eth0 and even wlan1

I have a raspberry pi 3 which will randomly disconnect from my wifi network. If I do ifconfig I can see that wlan0 has no IP address anymore. However, eth0 still has and my wifi dongle in wlan1 also ...
2
votes
1answer
27 views

Raspberry GPIO button sysfs

I am trying to connect a button to my raspberry pi 3 (model B). I want to do it via the sysfs approach. Here is a picture or my small circuit: It cannot be simpler: the black wire is connected to a ...
0
votes
0answers
38 views

Getting low FPS while using x11grab ffmpeg

Question : Why I am getting ~7 FPS even I have specified 30 ? I am using raspberry pi 3 and compiled latest soruce code from the GIT and still getting low fps(~7) while using below ffmpeg command ...
-1
votes
2answers
59 views

how to build simple interface for Gps project using neo-6m gps module

Hello, you may have heard this like thousand times. So i'm new to raspberry pi. And i just recently bought a raspberry pi 3 for my final year project. I bought this module also which is neo-6m GPS ...
0
votes
1answer
38 views

GPIO causes random input on room light switch / EMP?

I am building a simple application with a switch on the rasperry pi 3 b+. I have connected GPIO pin 18/32 through a 56k resistor to 3.3v (tried pin 1 and 17) to have it pulled up. The switch closes ...
0
votes
2answers
36 views

very odd problem - installation split over two usb drives

I installed raspian 3 on my new pi3b+ and something went weirdly wrong - twice. I used an 8GB micro in the micro usb bay on the pi3 and loaded the installation files on an 8GB Sandisk Cruzer memory ...
0
votes
0answers
14 views

Are There any MFRC522 Compatible Libraries for AndroidThings?

I am building a program that reads and writes to RFID tags. Are there any libraries that let me read and write to RFID tags? I have checked Galarzaa90's RC522 library, but I don't think RFID tags can ...
0
votes
0answers
33 views

Raspberry Pi 3 & L298N - Motor not turning

I bought two DROK L298 H-Bridges to control my DC motor (one for backup). I've connected it up to my Raspberry Pi 3 with BCM 12 as my PWM and 16 and 19 as my IN1 and IN2. Below is my code to test if ...
1
vote
0answers
36 views

Display slideshow of Images and Videos over SSH

Device: 3 B Plus I am trying to create a slideshow of videos / images. The user can select which files he wants to put in the slideshow and this will be shown on a TV. (As an addition, I would also ...
0
votes
0answers
15 views

PI can't save in desire encoding

If I change the local setting in the PI to Hebrew , and then open a text file I have an option to save the text as CP1255 \ ISO-8859-15 When I change the local back to English: 1. I can't see what I ...