Questions tagged [pi-2]

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.

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RPI - Rainbow Screen after SSH reboot - Parrot Security ARMHF

I cant seem to find a definitive solution to my problem. I have learned now by this THIRD occasion that I cannot simply "reboot" from SSH without killing my RPI Parrot installation and having to ...
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Micro-Sd memory problem

i am using a 64gb micro-SD but after using etcher for kali (7 Gb), i have only 55 mb left! How can i solve? I tried to burn the .img again but the problem is everytime the same
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Pi Crashing - NTP Issue ?

I am running a Raspberry Pi 3 as a weather station at home, and it will crash every couple of days. When I restart, the only clue in syslog is: Apr 15 13:35:27 weather systemd[642]: Time has been ...
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Raspberry Pi Model 2B Hostapd installation error: Unable to locate package

So, I am trying to set up my raspberry pi model 2B as a wifi hotspot. All the articles recommended installing and using hostapd and dnsmasq. I was able to install the dnsmasq package without any ...
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323 views

How can I create a bootable disk/image for raspberry pi?

I want to to create a (kind of) preset image for raspberry that will include some application set up that I'm working on a project of mine. So, let's start with a simple problem so that from this ...
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911 views

Connect to Raspberry Pi Over the Air Without Internet

For a school project, my group and I have decided to make a weather buoy to put in the ocean. We have several parts available to make the buoy, including 2 Raspberry Pis (One version 2 model B, and ...
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50 views

Permanent & Safe Powering of Raspberry Pi in Confined Space

I have a small project that involves the automation of the lights in a room using a Raspberry Pi and a set of four relays. All of the software and hardware is operational, and it is ready to be ...
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309 views

Panel settings: System panels all aligned left

I mucked with my panel settings using a janky mouse, and somehow removed a setting that had my system (clock, wifi, sound, etc.) on the right, and the Menu + custom apps on the left. Now everything's ...
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Is it possible to use a mSATA SSD AND SATA HDD on the same Raspberry Pi 3 Model B+? (and/or a M.2 SATA)

I'm working on a setup for my new RPi 3 B+, and I was wondering if it's at all possible to use both mSATA SSD storage (attached via the mSATA SSD storage expansion board) in addition to another SATA ...
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1answer
753 views

Is it possible to connect multiple DHT11 modules to Raspberry Pi 3?

Can I read at least 3 DHT11 sensors using GPIO with a Raspberry Pi 3? And if yes, how? Now I only have 1 DHT11 connected to the Raspberry Pi, but I used a library and I don't know how to add more ...
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Disable ALL video outputs and USB Ports. Only remote access

I don't know if this is possible. I'm hosting a web farm on raspberry pi (for fun). And one of them is at friend's house. I can access the pi remotely using VNC. How can i prevent my friend from ...
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Using NFC chip PN532 on RPi 2 model B

First of all, please bear with me as I'm very new to electronics! I'm trying to scan NFC tags with my Raspberry Pi and use that (ideally) from a NodeJS project. The NFC chip I bought is this one (it'...
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2k views

Wanted - chat script for Huawei E8372

I've just acquired a "Huawei E8372" USB dongle. I'm trying to connect to Tesltra (Australia). I switched off the wifi function of the dongle. I've managed to get the dongle recognised as /dev/USB1 ...
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RPi 2 and 3.95 TFT

I have tried as per RPi 2 and 3.95 TFT ili9488 comment, But it is not working with my Raspberry Pi (Ubuntu Mate OS). What can i do to work my display with RPi 2 and 3.95 TFT with ubuntu Mate os??? ...
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602 views

Raspberry Pi Camera(8 MP) shows blur images in Android Things installed on Raspberry Pi

Raspberry Pi Camera(8 MP) shows blur images in Android Things installed on Raspberry Pi. I use the code from Google Sample -- Doorbell application and capture the image but Image is too blur (Camera ...
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452 views

Issue with multi-user NAS setup

I want to build a NAS server with multiple users. To test this I created 2 users, pi and pi2. The external drive is mounted in /media/pi. Here is the ls -al output: drwxrwx--x 4 pi nasusers 4096 ...
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My Rasberry Pi do not let me install software because I don't have permission to write

When I want to install a package or do an apt-get update, the system returns an error like (read-only file system) can you help me please. I have Raspbian Stretch Lite. I did not download other ...
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663 views

How to Read LDR Input with Raspberry Pi's GPIO Pins in C? [closed]

Using an LDR and the below circuit diagram, I am trying to read the amount of light that the LDR is receiving. My primary goal is to detect a change when an object passes over the LDR to trigger an ...
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258 views

Can't connect to Nginx webserver on LAN

I cant connect to my Nginx web server when on my LAN, I have tried using both the internal and external IP's to do this I keep getting told connection refused. By this I mean that if I try to connect ...
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1answer
24 views

Connecting a Compaq CQ56 screen to a raspberry Pi

I've got this laptop in pieces, a Compaq CQ56. I want to take the screen and connect it to a raspberry Pi to make a interactive mirror like so many tutorials show. On the back of the screen it has ...
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437 views

bridge wlan0 to wlan1 to act as repeater

I know, this has been asked many times, but I can't find any satisfying answer given. This is the idea, the circles around the devices are the wifi range: I have a raspberry pi 2 model B with 2 ...
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1answer
2k views

Windows 10 IoT for Raspberry Pi on Hyper-V - black screen

I want to run Windows 10 IoT Core for Raspberry Pi on virtual machine to check how it works before I will buy my first Raspberry Pi. To start I used this tutorial: https://github.com/agaboduarte/...
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794 views

How to make Raspberry shutdown when internet/lan disconnected

I've already seen this link How to make Raspberry shutdown when I unplug the ethernet cable, but this solution does not work on Raspbian stretch since its network interface file/folder structure is ...
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script not working when on reboot, but when I power off/on it's working fine

I wrote a script which is scheduled for a cron job at reboot. This script changes the wlan1 from Managed to Monitor mode. but when I reboot the pi, this script doesn't work and writes the error ...
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Using Ethereum puppeth in raspberry pi

I have installed geth(go ethereum) client on a Raspberry Pi 2 using the below steps. wget https://gethstore.blob.core.windows.net/builds/geth-linux-arm7-1.8.2-b8b9f7f4.tar.gz tar -xvf geth-linux-...
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1answer
641 views

Does Turning The GPIO Pins On/Off Without Any Circuits Connected Harm the Raspberry Pi?

So, i'm just getting into raspberry pi and I am yet to have my order of circuit parts such as LEDs and resistors arrive. My question is that if I turn the GPIO pins on without any circuits attached ...
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148 views

is there any way to fix this issue?

pi@raspberrypi:~ $ raspistill -o image.jpg mmal: mmal_vc_component_enable: failed to enable component: ENOSPC mmal: camera component couldn't be enabled mmal: main: Failed to create camera component ...
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1answer
51 views

how to setup micro phone to raspberry pi [closed]

i want to setup a microphone to raspberry pi and record a audio signal for 5 sec when baby starts cry. how the setup should be done? the microphone should record when baby starts crying.
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48 views

Power supply or pi card?

I have a pi sd card with raspbian on it. The version of the Raspberry Pi I am using is the Pi B 2 When I tried to boot it up with a normal power supply (micro-usb) it started to boot fine, but it got ...
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1answer
54 views

Raspberry Pi boot and work perfectly as server with Rainbow screen

I searched for an hour and every problem about the rainbow screen is related to a boot problem. Not for me, I have no boot problem! In my case, my raspberry pi 2 is working perfectly as a server, ...
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RabbitMQ Server Installation

I would like easy installation instructions for RabbitMQ Server on my Pi. I tried a lot of things from various sources and they just don't work. One source even said RabbitMQ Server is pre-installed ...
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1answer
2k views

Green image with rpi picamera

The following code generates a green image in raspberry pi with picamera. import picamera with picamera.PiCamera() as camera: camera.resolution = (1280,960) camera.exposure_mode = '...
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839 views

RPi as VPN Gateway

I have been trying to setup a Raspberry Pi as a "Gateway" to my VPN server, even though I am not a sysadmin, I am usually fine with setting up software such as NGiNX however this has taken a lot of ...
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Raspberry Pi SMBv2

I'm trying to setup an SMB folder share from a Raspberry Pi 2 Model B that I can access from Windows 10. When trying to connect from Windows, I'm getting the below. Obviously I could just enable SMB1 ...
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23k views

Accessing the system log on Raspbian

How do I access the system logs in current versions of Raspbian? Where are these logs stored?
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504 views

create exact number of pulses in raspberry pi with DMA library to control industrial Delta Servo Motor angel and rotation [closed]

i want to control exactly how mush my servo rotate through DMA like pigpio with raspberry pi so i need to create exact number of pulses for servo . is there anyway to create exact number of pulses ...
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1answer
106 views

Software for compressing files in Raspbian [closed]

I am trying to compress a folder of many files into a tar.xz format. Does anyone know of some good software that does this job in Raspbian on a Raspberry Pi 2 B?
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2answers
306 views

Connecting a USB to mSATA

I have recently purchased the Raspberry Pi Desktop kit which has an mSATA interface... However, as SSD's are quite expensive these days and it only operates with USB 2.0 speeds, it occured to me I'd ...
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2answers
268 views

Is pinMode necessary in wiringPi programming?

Why we need to mention the pin is for input or output via pinMode. Can I simply use digitalRead or digitalWrite without setup the pinMode in before? In other words, if I set a pin as the output, can I ...
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1answer
502 views

LIRC won't recognise IR commands

I want to control my RaspberryPi B+ 1.2 using a remote control. I did the steps according to several tutorials but I can't get mode2 -d /dev/lirc0 to output any pulses. /boot/config.txt [pi1] kernel=...
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1answer
80 views

Turn on display after reboot

I have a monitor connect to a Raspberry Pi via HDMI. When I turn on the Raspberry Pi with the monitor off, and then turn the monitor on, I don't get any output. The HDMI only comes on if the monitor ...
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441 views

Install rtl8192cu WLAN driver on android

I have a RPi2 and have installed Lineage OS 14.1 (Android 7.1.2) However my wifi adapter(0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter) which worked on Raspbian, doesn't seem ...
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1answer
779 views

Cannot connect to Pi VNC server configured with proxy

VNC Viewer cannot connect to a Pi 2 configured with a proxy address. I've modified /etc/environment to add my college's proxy so that I can access the Internet after connecting to my college's ...
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1answer
77 views

What is the meaning of this errors?

I downloaded the driver for LCD touch display (KeDei 3.5 inch SPI TFTLCD version 3.0 20015/12/1) from http://kedei.net/raspberry/v6_1/LCD_show_v6_1_3.tar.gz. Afterward I unpacked it tar -xzvf ...
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2answers
125 views

Turning motor on and off from webserver

I have Apache server running on my pi. I send a httprequest from my Java app to the server to turn the motor on and off by executing a pyhton script. PHP code on the server: <?php if(isset($_POST[...
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1answer
26 views

2.4G keyboard with rasbain on v pi 2 model b

I have a raspberry pi model b. I installed rasbain form here. it was the minimal option. when it booted everything was ok. I plugged in my normal USB cord keyboard and it did not see it. Also my 2.4G ...
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1answer
367 views

How can I configures my raspbian to show console in it's display?

I have a touch display (KeDei 3.5 inch SPI TFTLCD version 3.0 20015/12/1) and a raspberry pi 2 model B v 1.1. I downloaded the last Raspbian Stretch Lite image (https://www.raspberrypi.org/...
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1answer
340 views

Unable to connect wifi in Raspberry Pi 3 and os design for navio

The link below shows the images of the output error, i`ve been working this for hours I follow instructions from here but still doesnt work . Hoping that someone would help me figure out the problem , ...
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1answer
234 views

Is it dead? - Raspberry Pi 2 B

I was connecting the UART connections onto my Pi to try crack a Cisco Merkai. Unfortunately, the ground connection hit a 5 V GPIO (hit GPIO2 or 4). My Raspberry Pi 2 boots however it does not do ...
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1answer
201 views

Detecting Button Press and Lighting LED [closed]

Using the pigpio library, I wanted to detect when a button is pressed and turn on/off an LED. I am trying to use the gpioSetAlertFunc function to trigger the LED when the button is detected as pressed....

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