Questions tagged [pi-3]
For questions that apply specifically to the Raspberry Pi Model 3 and not other/all models.
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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
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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 ...
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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
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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
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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 ...
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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
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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
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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?
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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 ...
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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 ...
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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
...
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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 ...
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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 ...
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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 ...
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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
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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
...
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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 ...
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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 ...
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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
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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, ...
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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?
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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 ...
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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
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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....
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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 ...
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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/...
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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 ...
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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/...
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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
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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
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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 ...
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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/...
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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:
...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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
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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
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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 ...
