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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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Two WiFi adapters; one ad-hoc, the other normal DHCP

I've trawled the forums but not found an up to date answer to this. My apologies if I have missed it. Basic Setup I have a rPi 2B+ with two wifi adapters connected. wlan0 & wlan1 both show in ...
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2answers
18 views

Raspberry PI black screens on reboot after updating

Good Day All, I recently experienced an issue with my Raspberry-Pi 2B that caused it to boot into a black screen after using the following commands: sudo apt-get update && sudo apt-get ...
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0answers
17 views

MQ135 Sensor - Output ppm

So I am making a Mq135 sensor and the wiring can be found on: circuit.io/app?components=9443,200000,398790 It isn't shown but the AO is connected to channel0 via the breadboard the code is : #!/usr/...
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0answers
23 views

illegal instruction when importing opencv in python 3.5

illegal instruction when importing opencv into python compiled opencv3 for python 3 by using these commands $ cd ~/opencv-3.3.0/ $ mkdir build $ cd build $ cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D ...
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2answers
34 views

raspi-config network option not working

I am trying to turn on the network option in raspi-config, but when I do, I get this error: could not communicate with wpa_supplicant Then I hit enter to continue and I get this message There was ...
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1answer
33 views

Why is bme/bmp280 temperature and humidity sensor returning 0 value?

I'm having problems with bme/bmp280 temperature and humidity sensor on my raspberry pi 2. It does not give me feed back information. i have my ARM i2c protocols on and i wired it correctly but it ...
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1answer
20 views

IncrediblePBX will not boot on newer versions of Raspberry Pi

I have been running IncrediblePBX on an older version of Raspberry PI. I have made an image and copied to new micro SD card, but cannot get it to boot on newer versions of Raspberry Pi. I have ...
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1answer
24 views

Watchdog configuration Raspberry pi 3

My plan is to configure the file /etc/watchdog.conf to detect if the process that I want is down and reboot the system to run again. For example, I work on a Raspberry Pi 3 in Debian 9. I would like ...
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2answers
77 views

How to install updates without internet on Raspberry? [duplicate]

I want to calibrate my LCD screen, but i have no internet connection to my Raspberry Pi 2B. The terminal commands I would use with internet on the Raspberry Pi is cp LCD-show/xinput-calibrator_0.7.5-...
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1answer
52 views

Serial Communication from Raspbian using Python to Arduino

In Terminal its working but not working using python code. My Code: import serial from time import sleep ser = serial.Serial ("/dev/ttyS0") while True: received_data = ser.read() ...
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19 views

How to read voltage data from arduino nano (slave) using i2c communication

python code: import smbus import time bus = smbus.SMBus(1) SLAVE_ADDRESS = 0x10 def requestreading(): # try: # # b1 = data[0] # b2 = data[1] # b3 = data[2] # ...
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1answer
31 views

Connecting 4 HX711 to one Raspberry Pi

I have four individual scales that are each connected to a HX711, those HX711s are each connected to the Raspberry Pi. I'm a beginner in python as well as this Rasberry Pi. how do i properly code this ...
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27 views

Daily Deviation Picture Frame on RPi

This guide, Raspberry Pi - Daily Deviations Picture Frame, seems to be not working anymore. I tried different methods and it seems that the code in getting images from Deviantart daily deviations ...
2
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1answer
45 views

Android Things Wear in Raspberry Pi Zero

Can I install Android Things Wear OS in Raspberry Pi Zero? if not, what will be the microprocessor I can use?
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2answers
50 views

how can i start my project when Pi is Turn On or Plugged In -Raspberry pi 3b+

need to run my python file when raspberry PI is turned on or plugged in. I'm using Raspberry Pi 3B+ sudo nano /etc/rc.local this is not Working # rc.local # # This script is executed at the ...
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1answer
31 views

Raspberry Pi 2 B “No wireless interfaces found” error

i set up raspian os with recommended apps version on sdcard via noobs. it works on rpi successfully but without wireless connection. in rpi configuration window, set wifi country button is disabled. ...
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1answer
27 views

Cannot find wlan0 wifi dongle

I have tried multiple tutorials on how to setup wifi on my Raspberry Pi 2 but none have worked. New to Linux, hoping someone can help. When I highlight my network connection in the toolbar I see ...
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1answer
38 views

UFW Enabled, but not starting upon Pi reboot

I am running servers on several Pi's for VPN, OpenTTD, etc. I have installed ufw on all of them to try and keep them a little more secure. The server running the VPN is causing some issues as ufw ...
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1answer
52 views

How to transmit hand gesture data from a laptop to Raspberry-pi

I am making a hand gesture bot. In this hand gestures are detected from a laptop using image processing (used OpenCV & Python). I don't know how to transmit real-time output wirelessly of image ...
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0answers
28 views

PI2 and Ubuntu Core 18 kind of stuck

I just conect my PI2 that I purchased a few years ago. I could not install any of the Raspbian or what was on the micro sd card. So, I downloaded and installed ubuntu-core-18-armhf+raspi2.img.xz. ...
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2answers
53 views

Why would there be voltage on a GPIO Pin configured as Input

I have a Model 3 Pi, with a SIM800 GSM card attached. The GSM card needs to be powered up by applying a High pulse to a pin pin on the card for 1.2 seconds. I attached one of the Pi Pins to this pin, ...
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3answers
71 views

unable to ssh into raspberry pi

My raspberry pi 2 is connected to my home Wi-Fi. While I'm able to ssh pi@<ip address> into raspberry pi at home, I'm unable to do so from my office in school. When I connect my raspberry pi 2 ...
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3answers
40 views

Full backup of server [duplicate]

I am building a web server od Raspberry Pi 3. The system and the data will be on microSD card and I am curious if there's any way to automaticaly backup the whole card with data? I mean - if anything ...
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0answers
28 views

Running Opengl application on pi 2b, frame issues. Pi issues, or optimization problems?

Here is my application that I have managed to get running on my pi. import pygame import random from pygame.locals import * from OpenGL.GL import * from OpenGL.GLU import * vertices = ( ( 1, -1,...
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0answers
60 views

Why is my raspberry pi crashing? Reading DHT11 - Logging to text file with python

So, I'm pretty new to this. Want to play around with temperature & humidity sensors. I have a pi with 4x DHT11 sensors, on wires of ranging lengths hosted in different situations. I've written a ...
3
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1answer
35 views

Pi 2: External HDD Randomly goes into Read Only File System Mode

I've a raspberry pi 2bplus and I've installed the latest Raspbian strectch on it. I've connected External HardDrive to the pi. I'm running into a really weird problem that doesn't make sense to me ...
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2answers
34 views

Adduser command missing

I use rkhunter on all of my RPis, since some are used as dedicated servers, to try and ensure no rootkits or other malware are installed on them. When I did the check as usual today, I got the ...
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0answers
12 views

Is overclock a good thing to set to full, my sources say there is a risk of card damage

I love making things work on the Pi, I have a lot of things that involve overclock on full, VLCplayer, minetest, and some other apps. But i have heard there is a risk to what I am doing, can someone ...
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1answer
44 views

Illegal instruction when trying to update package on Raspbian-Lite

On Raspbian Lite I'm trying to run apt-get upgrade but running into following issue: Setting up libssl1.0.2:armhf (1.0.2r-1~deb9u1) ... dpkg: error processing package libssl1.0.2:armhf (--configure): ...
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1answer
43 views

{ [Error: , Remote I/O error] errno: 121, code: '', syscall: 'writeByte' } from raspberry pi to Azure

I tried to follow the instruction below to send sensor data from my raspberry pi 2 to Azure. Connect Raspberry Pi to Azure IoT Hub (Node.js) I connected the sensors to my pi device in a different ...
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1answer
10 views

DHT11, MQ-X at the same time

I'm wondering can I detect temperature, humidity and gas at the same time using DHT11, MQ-X sensors? If so, how? I can find numerous solutions using each of them separately, but not simultaneously.
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36 views

How to install Android on Raspberry Pi 2B?

I have tried following, but failed at some stage Emteria OS : knowing that this OS is for Raspberry Pi 3 model, anyway I tried to install it for experiment. Screen froze at Kernel Starting KitKat for ...
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0answers
29 views

Buffer speed way below theoretical speed on local network while watching a movie in Kodi

I am running a Kodi media center, more specifically OSMC, on a Rapsberry Pi 2 in my living room which sources its movies, shows etc. from another Pi thats located in another room (the rest of my home ...
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1answer
38 views

Light weight OS

Is there any light weight OS for RPi with GUI. All I have is an 8 GB micro SD card for boot so if I run any application on Raspbian OS such as chromium, it crashes
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0answers
15 views

Reusing old laptop speakers [duplicate]

The speakers are salvaged from an old Toshiba mini nb520 laptop. How could I go forward to use these speakers? Will I have to write my own drivers? Will it be worth the work? What electronic ...
2
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1answer
70 views

Use matplotlib on Raspbberrypi

Using The following Code for saving plot locally on raspberry: from numpy import genfromtxt import matplotlib.pyplot as plt import plotly.io as pio y = range(10) x = range(10) plt.title("Adc data") ...
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1answer
40 views

How to modularize module in make menuconfig

In the make menuconfig interface, I would like to modularize a module. I can set the module with a star (*). It's meaning the module will be compiled in core. I'm not able to set it with a M . I'm ...
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0answers
45 views

How to configure duplicate screen on a Pi?

I have a Raspberry Pi 2 connected with a TouchScreen. I also connect another external display via HDMI. Goal I've been trying to make my external display show as duplicate mirror the one on the ...
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1answer
58 views

How can I determine which model Raspberry Pi I am running? [duplicate]

I have several RPi's on my network. How do I figure out what model any given RPi is?
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1answer
90 views

how to use xrandr tool for dual screen

I'm working on Raspberry 2B with Raspbian Strech. I plugged a USB / DVI adaptator which is listed in the lsub command : pi@raspberrypi:~ $ lsusb .../... Bus 001 Device 006: ID 17e9:4301 ...
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1answer
37 views

Automation Project Relay Connection [closed]

How many Relays we can connect with one Respberry Pi? and can we connect two respberry devices with each other for home automation?
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0answers
25 views

adding a static route or iptables to block phone home Chromecast Google DNS 8.8.8.8 and 8.8.8.4.4

In my Pi 2 b, I've created a route and tried some masquerading via iptables, and I'm using pi-hole. The Arris cable modem does not have a feature to add any static routes nor CLI for iptables. This ...
0
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1answer
21 views

Raspberry pi ds1307 integration

I would like to integrate ds1307 clock module as a part of my 'garden automation project' to raspberry pi. The concept of the project is the servo will rotate in a specific time. So should I ...
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0answers
34 views

How to enable the mouse cursor when only usb mouse plugged in?

I have configured kiosk in raspberry pi with touch screen. And When I am using the USB mouse then cursor is not showing. I have followed https://medium.com/stories-from-upstatement/how-to-build-...
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2answers
79 views

How to connect to the internet using an Ethernet cable

I have an Ethernet cable which I use to connect to the internet on a desktop Windows machine. These are the IP settings I gave the Windows machine: IP adr. 172.18.14.19 subnet mask 255.255....
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1answer
27 views

Raspberry Pi 2 power consumption incorrectly

Before, i'd a problem about changing governor for my Pi (cpu always stays at 600Mhz in every mode), after doing some tweaking, i'd already make it up to 900Mhz. However, now i'm using a power-meter to ...
1
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1answer
23 views

Access NextCloud-Files within Host (Raspberry Pi)

When running a NextCloud server on a Raspberry Pi 2 with Raspbian, how do I access the the synchronised files on that Raspberry Pi without using the browser? The data folder of NextCloud returns that ...
0
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0answers
22 views

trying to rotate 28BYJ48 and 2 NEMA17 stepper motors simultaneously but the rpi reboots each time

I am trying to control a 28BYJ48 stepper(Driver ULN2003AN) and 2 stepper motors NEMA17(A4998). I wrote the code using python using PIGPIO but the rpi turns off every time I try to run the code. I ...
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0answers
46 views

“Performance” gorvernor doesn't change cpu frequency

When i tried to change the default governor of my Raspberry Pi 2 (currently at Powersave mode) to Performance mode which is expected to push my Pi's CPU freq up to its maximum number (900Mhz) by using ...
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0answers
53 views

Building PyQt5 on one raspberry pi 2 succeeds, but fails on another

I am building a solution for which I need a reproducible process for installing everything necessary. When its time to build and install PyQt5 I am succeeding on one device, but failing on another. ...