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
Join us in building a kind, collaborative learning community via our updated Code of Conduct.

This refers to the quad-core Raspberry Pi 2 (currently only available as a "B" model with Ethernet and four USB ports), with 1 gigabyte of RAM.

1
vote
2answers
44 views

Raspberry Pi DC Motor Not Working

So, I am attempting to control a DC motor using a RPi Model 2B. I am using a l293d motor driver to try to control the motor and a 4 AA battery holder. The diagram is supposed to look like this ...
0
votes
0answers
20 views

How to create installer files in Raspberry pi

I have created a program in Raspberry pi and I am running it using the command python myprogram.py . Is it possible to create the installer file of this program? that means after installing this ...
1
vote
2answers
29 views

Raspberry Pi Error: AttributeError: module 'l293d.driver' has no attribute to 'motor'

So, I am trying to use my RPi model 2B to control a DC motor with an l293d controller. I have moved onto the python3 script and imported the 'l293d' module. Here is my code... import l293d.driver ...
0
votes
0answers
21 views

Data transfer from Arduino to RPi through WiFi [closed]

Can anyone help me in transferring data from arduino to RPi which are connected through same WiFi? Can anyone suggest any WiFi module which best works with arduino?
0
votes
1answer
16 views

Connecting arduinos to RPi and sending data to cloud

Can I connect 9 arduinos to RPi,If connected then I want my arduinos to transfer data to RPi through WiFi and that data i want to transfer to Cloud, is that possible?
0
votes
1answer
28 views

Read GPIO pin on web page

I was able to control an led from a web page using the following code. when I call http://myip/pinon.php it will light up the LED and http://myip/pinoff.php will turn off the LED. pinon.php <?php ...
0
votes
1answer
34 views

Can I modify an RPi2 image to boot on an RPi3 B+?

I have a Raspberry Pi 3 B+, and none of the operating systems that usually work on the RPi 3 will boot. I've done a small bit of research, and I think this has something to do with an outdated ...
1
vote
0answers
19 views

hostapd.service not found

I am trying to make a Raspberry Pi 2 as a wifi access point in a standalone network. I followed this tutorial: https://docs.google.com/document/d/16hJS7fnPyKUwbvR33_nMku_b6XcYaBJXVpeCIMoJzcQ/pub At ...
2
votes
0answers
132 views

PI4J + Adafruit LCD with MCP23017

Got this device. Python example char_lcd_plate.py is working perfect. But I would like to manage it with Pi4J. I copied bits from python example LCD_PLATE_RS = 15 LCD_PLATE_RW ...
0
votes
0answers
12 views

Shown cursor in Chromium Kiosk

How can i display the cursor in Chromium Kiosk? Because my cursor is hidden. I can't do anything such as controlling the mouse. I use Raspberry Pi 2 running Rasbian.
0
votes
0answers
31 views

Raspberry pi 2 to Windows 10 SFTP/SSH

I am trying to connect my windows 10 pc with raspberry pi 2 using python script. What I want to do: I want to download the file from windows 10 machine with the help of python Script from raspberry pi....
1
vote
1answer
29 views

RaspberryPi 2 GPIO stopped working

I have RaspberryPI with Arch Linux and everything was going well, until this morning when I tried to do my usual work on it, it sounds like nothing happening at all, I have checked with pintest (I use ...
0
votes
0answers
52 views

Raspberry Pi Login Screen Change

I am pretty new to raspberry pi. I was trying to change the login screen of raspbian in my native language. Can anyone please suggest how can I do that? I already installed unicode library, installed ...
0
votes
0answers
16 views

log TTL event time along with frame timestamp using picamera python library

I am using picamera library to store the frame timestamp along with the video. Next, I am sending square TTL pulse to the raspberry pi GPIO pin with the following signature: 1 second ON, 1 second OFF, ...
0
votes
0answers
28 views

PPS ioctl failure in GPS

I am using U-Blox AG GPS in my Raspberry pi 3. My GPS had a fix and displayed all the data in a right way. After an hour of working, it is not getting a fix. So I checked the gpsd status. It displayed ...
0
votes
1answer
39 views

Reading Multiple bytes in Raspberry Pi over I2C using Wiring Pi library [closed]

0 down vote favorite I am trying to build one sensor interface using Raspberry Pi over I2C. I have installed WiringPi. I am seeing limitations of wiringPi library, that supports only 1 or 2 bytes I2C ...
0
votes
1answer
12 views

At what instances do we use the Board mode and BCN mode in Raspberry Pi?

I know about the two modes of working in Pi using python, Board and BCN. However, I am really confused as to the instances or situations where I should use them. An example demonstrating their use ...
0
votes
3answers
35 views

Raspberry Pi Random Turns Off

So, I was doing a project with PWM (Pulse-width modulation) but something unsual happens, my raspberry pi turns off. I am using a RPi model 2B, and my circuit looks as follows simulate this circuit &...
1
vote
2answers
40 views

Downgrade libc6 to resolve breaks?

I was near the end of the process of upgrading my pi from Wheezy to Stretch (which worked according to cat /etc/os-release, I was trying to clean out old packages after reboot). The following ...
0
votes
2answers
34 views

Will a Raspberry Pi 3 case fit a Raspberry Pi 2 B?

I've gotten a Raspberry Pi 2B as a gift, but without a case. I'm trying to buy me a case, but I mostly find Pi 3 cases being offered. So, I'm asking the opposite of this question: Is the Raspberry Pi ...
0
votes
1answer
15 views

Help using av jack on pi 2

Help please I have a portable DVD player with an audio/video input and it works with all devices except my raspberry pi 2. I also need it to fit in the DVD player case so I soldered the video cable to ...
0
votes
1answer
25 views

Pi screen freezing and board getting warm with LoRa

I have a Raspberry Pi 3 and a RPi 2 for testing these two LoRa modules. I'm having a couple issues... SEE BELOW FOR UPDATED ISSUE RPi screen freezes - Whenever I try to test the modules with example ...
0
votes
0answers
13 views

Problem after updating opencv

I am using raspberry pi 3 jessian I tried to update my opencv using Sudo pip install opencv-contrib -python Now i cant import cv2 in any program . Thanks in advance for any help. I am really in ...
1
vote
1answer
32 views

HDMI projector doesn't detect my PI

I have a Raspberry Pi 2 model B v1.1. I wanted to set It up for the first time. I loaded the Raspbian Lite .img file into my 4Gb micro SDHC class 10. I put It in Its slot. I connected It to an EPSON ...
-2
votes
1answer
47 views

How to upload data from raspberry pi to MySQL, geting errors [closed]

Basically I am trying to upload the data collected from my raspberry pi to MySQL, I have a table called DHT_data with columns 'datetime' using data type timestamp, 'temp' using data type numeric, 'hum'...
0
votes
0answers
7 views

How do I block USB & LAN Card in raspberry pi [duplicate]

The Problem block USB & LAN Card in raspberry pi What I Have Tried I added blacklist usb_storage or storage-usb in /etc/modprobe.d/raspi-blacklist.conf to block USB in raspberry pi but did not ...
0
votes
1answer
38 views

Which OS should I install on an old Raspberry Pi 2b [closed]

I have an old Raspberry Pi 2b. My SD went nuts, so I have to install OS again. I tried raspbian 9, but everything seem soooooo sloooooow. I would love kodi, but I can cope with just a media player (...
0
votes
1answer
25 views

How to send file from Web Application to Raspberry Pi?

I am working on a project which I have to send file from my Web Application(Node.js) to multiple Raspberry Pis. The problem I'm facing is that I don't know how to send file generated by the Web App ...
0
votes
1answer
37 views

Raspberry PI + OpenNI2 + OpenCV

I have opencv installed on RPi. Now I need to install OpenNi2 and I have this error: "error: array subscript is below array bound" I use: PLATFORM=Arm make gcc -v 6.3.0 How to solve the problem ...
0
votes
0answers
34 views

Missing L4 chip near HDMI port, not boot up and usb port no power output

My rpi work perfectly until I touch it, It not boot up then I found the L4 chip HDMI port is missing(I have touched HDMI port I think my fingernail pull it off...). I found that tiny chip in the box ...
0
votes
2answers
66 views

Raspberry Pi UPS - Thoughts for off shelf items

I've been looking at off the shelf raspberry pi UPS/shutdown controllers. I've come up with 4 and wanted somebody to weigh in on the choices. My use case is pretty strait forward. I want the pi to ...
0
votes
0answers
17 views

Raspberry pi not powering

I have a raspberry that I want to power with a battery (12V 7A) through a tension reducer (5V, max 3A). When I attach the board to the charger nothing happens. When I attach the same charger to a ...
0
votes
0answers
32 views

sd card write on Windows 10 Pro 64 failed

I try to write my RaspI SD Card on win10 using Etcher-Setup-1.4.4-x64.exe and 2018-04-18-raspbian-stretch-lite.img image. Write and verify looks good, but Raspi 2 Model B don't boot. I get no error. ...
0
votes
1answer
24 views

Three sites - three nginx conf files - all resolve to same directory

I recently tried one too many things and had to re-flash the SDCard in my Raspberry Pi. Started over with Raspbian Stretch Lite. Added nginx, PHP7.0-fpm and a self-hosted social media service (Pleroma)...
0
votes
3answers
136 views

Arduino-Raspberry Pi fast data communication through serial

I am trying to sample from two analog sensors at highest frequency possible (using and Arduino Uno, MPC3002 ADC), then send the data to raspberry pi to save them as binary file. Arduino and MCP3002 ...
0
votes
0answers
16 views

Trouble running RPi cmd commands in Java

To test my program, I was trying to run the shutdown command. I tried using a ProcessBuilder to just run the command: ProcessBuilder builder = new ProcessBuilder("shutdown"); builder....
0
votes
0answers
22 views

Pi not booting: Error on SD and only flashing cursor when booting

One day I started my Raspberry Pi and it crashed, so I flicked the power off. I restarted it and it booted like normal but I noticed an error avahi (SD issue). When it came to the desktop part it ...
-1
votes
1answer
47 views

How can capture many images using picamera and loop and different name? [closed]

Here's my current Python code: import picamera with picamera.piCamera() as camera: for i in range (10): camera.capture("/home/pi/Desktop/newfile/newimage.jpg")
1
vote
1answer
24 views

How do I get camera to connect to anyone's phone and let the phone take picture using the camera and get that picture back?

I have an idea but not sure if I can Raspberry Pi to do this. So I have this camera in public that anyone can use. Anyone can connect to the camera using their phone and take picture with it, and get ...
1
vote
2answers
64 views

Check relay module state

I found a few good answers and guides about how to control a relay module from the pi, however, I want to find a way to check its state/status from the pi, is there a way to determine if the relay is ...
0
votes
1answer
27 views

How do I connect my Debian 9 computer to my Raspberry pi 2 using the ethernet connection to share the pi2 wireless?

I have the recent version of Debian in my computer and a recent version of raspbian in my PI2. I want to connect Debian to Raspberry pi 2 using an ethernet cable, connecting my Debian to share ...
0
votes
1answer
51 views

How to wake and sleep pi using microcontroller

I am looking to put a raspberry pi to sleep using a uC to save power and to also wake it back up when the uC needs to unload processing requests. Unfortunately, I need an SBC of some sort with this ...
0
votes
0answers
13 views

how can I make a video from a specific folder of images?

import os import time FRAMES = 1000 FPS_IN = 10 FPS_OUT = 24 FILMLENGTH = float(FRAMES / FPS_IN) frameCount = 0 while frameCount < FRAMES: imageNumber = str(frameCount).zfill(7) os.system(...
0
votes
0answers
64 views

Raspbian Stretch not working on RPi 2 B

I downloaded the image for Raspbian Stretch and burnt it to my sd card which I put in my Raspberry Pi. But the Pi refuses to boot. No errors or anything, it just doesn't start up. There is no hardware ...
0
votes
2answers
119 views

How to format a corrupted SD Card

I was writing something to the SD card at one point and I disconnected. Unfortunately I am unable to boot into Raspbian now as it will simply boot loop and when I tried to use the tools Gparted ...
1
vote
1answer
41 views

How to prevent raspberry to connect with open wifi?

Actually i am working on a project. I want my raspberry to stay connected with my DSL wifi. But raspberry connect with a open wifi automatically . Thats why i lose connection. Please help me that how ...
0
votes
0answers
29 views

How do we connect a camera using a Raspberry Pi 2 to an iPhone?

How do we connect a camera to a raspberry pi 2 that connects to an iPhone over live video? We are willing to buy any camera that is necessary.
0
votes
0answers
20 views

How to convert Images from database(cloud) to timelapse video via raspberry pi?

hye, my project is about timelapse but we are not using the rpi camera to capture the images instead we are using DSLR camera for some reasons. once it captures, the images would be saved into the ...
3
votes
1answer
45 views

My PIR sensor seems alittle keen to sense things

Before you tell me answers for my issue already exist I'd like to mention that I have checked previous answers and where similar issues have occurred I have tried to use their approved answer. So far ...
0
votes
0answers
53 views

Cannot install libextutils-cbuilder-perl - “Unable to correct problems, you have held broken packages.”

I am trying to install sli3er engine on a Raspberry Pi using this document. However, when I install the dependencies, I got an error here; INSTALL COMMAND: sudo apt-get install libextutils-cbuilder-...