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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2nd ssd installation in NTFS [closed]

I added on my PI2 a 2nd SSD that I want to use to store WINDOWS documents so NTFS partition I declared it in primary Device Boot Start End Sectors Size Id Type / dev / sdb1 2048 1000215215 1000213168 ...
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2answers
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Access 192.168.2.x from 192.168.0.x

My Rpi-2 is connected to my home router which assigns an IP address 192.168.0.x to all its clients. I have created a network bridge on this rpi so that it shares the main routers connection with the ...
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1answer
54 views

RPi will not boot to command line [closed]

My RPi 2 (jessie) still boots to desktop, if I configure CLI in raspi-config. I also tried what was recommended here: sudo systemctl set-default multi-user.target sudo ln -fs /lib/systemd/system/getty@...
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MySql backup database every night

I have service and MySql database on my Raspberry Pi 2B. Yesterday, my SD card in my phone died. I started thinking about database backup on my Raspberry Pi. Anybody have any experience with this? I ...
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Load cell changing over time

I'm using a 1kg load cell beam (see example at bottom) connected to a HX711 board then connected to the Raspberry GPIO. I'm running this Python3 code: https://github.com/gandalf15/HX711/blob/master/...
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I see two Octopi instances on my Raspberry Pi - why, and how can I stop this?

I installed Octopi on a brand new R Pi straight out of the box, connected it to my Wireless network and to my Ender3D and all went well for a few days, until I started having odd symptoms, such as ...
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1answer
35 views

Update file to text file on webpage [closed]

(If this is the wrong stack please let me know) Consider the following: I have a nodejs file called stbot.js. This file I code on my laptop and transfer to my pi via github. However it kinda annoying ...
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1answer
28 views

How to connect raspberry pi to cellphone tower and communicate with it by Android phone [closed]

I need to communicate to my raspberry pi with my android phone via cellphone tower. For example,a raspberry pi is connected to nearest base station, if i enter into that base station's range i want to ...
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Audio output is changing after I exit the ssh session

My RPi2 has both HDMI and jack output audios. I would like to use always only the jack output. If I connect via SSH to the pi and select the output in alsamixer (using F6), I can activate the audio ...
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3answers
96 views

Cannot reach Internet after assigning fixed IP address in dhcpcd.conf

Hardware: Pi 2 OS: Raspberry Pi OS 32-bit No firewall. Running over ethernet (no WiFi card) I am following a tutorial to set up a Pi as a file server for home. For this, I need to install Samba. ...
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25 views

JAVA development environment for Raspberry Pi 2 or perhaps from the command line?

Hi I'm new to Raspberry (Pi 2) and would like to know (1) if it's feasible to develop simple JAVA apps in a development environment (Eclipse? Others?) or failing that from the command line. (2) a ...
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Change the read-only to write [closed]

I don't know why suddenly the following message has started to appear. -bash: cannot create temp file for here-document: Read-only file system I can't write files, only read, can't use tab to end ...
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1answer
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playing music from stream [closed]

I have a raspberry pi 2 model B and a raspberry pi 1 (I think, it doesn't have any version number on it and I have had it for a long time and I don't quite remember exactly the version). I think the ...
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1answer
44 views

Installing fresh image of operating system on Raspberry Pi 2

I have an older Raspberry Pi 2 that I'd like to put the latest compatible OS on. The specs of my Raspberry Pi: Raspberry Pi 2 Model B 1 GB from Canakit.com It came with a 8 GB SD card. I bought it ...
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Raspberry Piv2 Camera NoIR displays pink colors in video feed!

I want to ask that I have a piv2 NoIR camera that gives pink colors in a camera stream running live on my Jetson Nano, So I want my piv2 camera to display normal colors then what can I do? Do i need ...
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1answer
39 views

Raspberry Pi 2B missing RAM

weird thing here. I noticed my Pi model 2B is reporting a smaller amount of available RAM than before (~700Mb vs 1Gb). [root@raspberry ~]# free -m total used free ...
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1answer
54 views

Raspberry Pi & Motor Control [closed]

I am looking to use raspberry pi to control a motor that has multiple speeds but want all speed and timing to be controlled on the pi. Would the proper setup be a breadboard with a servo motor ...
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2answers
85 views

Using PWM with RPi.GPIO in Python

Scenario: I want to control a PC fan using the Raspberry Pi. The 4-wire-fan (MGT9212UR-W25) has its own power supply (12V) and can be controled via PWM. I would like to control it with a Python script ...
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2answers
27 views

Unable to upgrade my model 2B Pi running Jessie

I am trying to update all of the software on my model b pi. I have cleared as much space as possible - then did df -h Filesystem Size Used Avail Use% Mounted on /dev/root 6.0G 5.2G 450M ...
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1answer
35 views

Can Rpi GPIO pins be used to drive a DC motor? [closed]

I tried to GPIO pin to high and I cannot see output voltage. I try every solution but no one works for me. import RPi.GPIO as g g.setmode(g.BOARD) g.setup(16, g.OUT) g.output(16, g.HIGH) I look GPIO ...
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1answer
41 views

Reconfigure pi GPIO default states

The default states (right on boot), on my pi are: +-----+-----+---------+------+---+---Pi 2---+---+------+---------+-----+-----+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi ...
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2answers
162 views

How to turn off relay when RPi shuts down

I have connected a relay to BCM 14 and by setting its output to HIGH I can turn it on, making a 220V bulb to turn on. I use for that the following python instructions: GPIO.setmode(GPIO.BCM) GPIO....
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17 views

RPI2 with two WiFis works ok for single requests, browsing is impossible

I want like to create a simple WiFi booster with Raspberry PI. So I have RPI2 with two dongles: Ralink (rt2800usb) and Edimax (rtl8812au). pi@raspberrypi:~ $ lsusb Bus 001 Device 005: ID 148f:5370 ...
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Problem I2C when using BH1750 photoresistor

(Raspberry Pi 2, model B, V1.1 - buster OS - all updated / upgraded - smbus loaded on) Hi, I am quite new to the Raspberry Pi and recently I have hit a brick wall. I am trying to link the Raspberry ...
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3answers
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connect multiple temperature sensors to rpi

I need to connect multiple temperature sensors to my RPI. can you, please, elaborate whether/how can this be done with this or this unit? or can you suggest other unit? I need to measure temp on the ...
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1answer
120 views

Can I upgrade my Python version with miniconda on Stretch or do I need to upgrade OS?

Need some advice here. I have an old RPI 2B with ARMv7 Processor rev 5 (v7l) running Raspbian GNU/Linux 9 (stretch). At the moment it's got python 3.4.3 and a lot of other packages installed with ...
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1answer
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Raspbian Crashing on RPi2 | full screen goes to one (somewhat random) color when web browser loads heavy page

I've had this strange problem with my Raspberry Pi 2 for a long time now. I have it set up as a sort of third monitor for my main computer. I've installed Synergy and Redshift, then set the screen to ...
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19 views

lxde with debian 8 on pi-2

On the old wheezy OS, lxde was provided for the desk top. When you were looking through folders, you had a choice of how to view the files in the folder. (list,small icon,large icon,thumbnails, etc.). ...
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1answer
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RPi 3B (not +) image on RPI 2

I have OctoPrint running on my Pi 3 Ok withou any issues. Should I be able to boot the same image on a Pi 2? David
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108 views

Getting a NRF24L01 module running with Java

I'm currently trying to make a NRF24L01 module work by using Java. I found this library that makes use of the JNI, but I can't get it to work. When I try to run the provided example code the ...
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32 views

Connecting 3 ultrasonic sr04 sensors, 4 infrared avoidance module to picon zero mounted on raspberry pi 4

Im begginer to raspberry pi, can you help me please? Im trying to connect 3 ultrasonic sensors + 4 infrared avoidance module to picon zero mounted on raspberry pi 4. Currently I have picon zero ...
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37 views

OMV on RaspberryPi 4 or Pi 2B+

Am new with raspberry pi and i try to make a nas with my pi using omv, i have both pi4 and p2b+. This are the step that i follow: Format SD Card with SD Card Formatter Download Raspbian Buster Lite ...
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1answer
278 views

How to Install TP-Link TL-WN823N V2 on Rasperry Pi 2?

I've got a Raspberry Pi 2 I'm trying to install a TP-Link TL-WN823N V2 onto. pi@raspberrypi:~ $ iwconfig eth0 no wireless extensions. lo no wireless extensions. pi@raspberrypi:~ $ ...
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1answer
44 views

Creating a network extender

Today I was hoping to setup a network extender. I want it to connect to my router via ethernet, and then share out that connection via WiFi, and stay on the same network. All of the tutorials I looked ...
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1answer
31 views

RFID and LED Script disables RFID reader until reboot

I have two simple scripts, which work individually. One simply lights an LED, the other reads RFID. Now I want to put them together, but seem to fail. Once this runs, I can't read RFID anymore until ...
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0answers
35 views

Can powering a DC motor through the USB ports of my Raspberry Pi Damage the Pi?

I'm working on a project that contains two DC motors and a Raspberry Pi, I do not have other components like Relay, Motor Drivers, transistors etc. I am aware that powering a motor directly from an ...
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1answer
81 views

Minecraft server not working

I want to run a Minecraft server from a Raspberry Pi 2. I already tried the 1.8.9 and the 1.15.2 versions. Both of them started, as expected. On my computer I tried to connect, but after a while, it ...
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2answers
178 views

is there an equivalent to the dkms tool in raspbian buster?

I am installing a wifi dongle on an RP2B and the only instructions I can find were for Linux Mint using: sudo dkms add ./rtl8188fu I get a command not found. How is this done in Raspian?
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Create website to control RaspberryPi remotely [closed]

I wanted to home automation for a long time. Basically what I want is a website through which I can control my raspberry pi GPIO pins and also read and display data from them on my website. I will ...
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1answer
394 views

How do I add a new source to /etc/apt/sources.list?

Doing $ sudo apt-get update gives E: Some index files failed to download. They have been ignored, or old ones used instead.. After doing some digging i found this Cannot connect to mirrordirector....
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1answer
40 views

Use Raspberry with two devices that require 3.3v pin

I'm planning a project with an RFID reader that connects to the GPIO pins on a RPi2 and will use the 3.3v pin. Additionally I wanted to add an active buzzer, which also would require an 3.3v pin. Is ...
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43 views

Connect Raspberry Pi with Official Arduino TFT Screen

I've been owning for a few years now this useful LCD screen from Arduino https://www.arduino.cc/en/Guide/TFT and I wanted to ask if it was possible to connect it to the Raspberry Pi 2. The official ...
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KNN Model, cannot import from Windows. What to do for Raspberry pi with Low RAM

I have a raspberry pi 2b with 1 GB of RAM. I want to train an ML model with about 6k images. I followed https://github.com/kevinzakka/blog-code/blob/master/knn/knn.py and I have a model that works ...
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103 views

Hardware PWM on Raspberry Pi 2 using .NET Core 3.1

I would like to use hardware PWM on a GPIO port to generate RC-5 IR codes with an IR LED. I read that .NET Core now has PWM support and that the Pi has at least one PWM-enabled GPIO pin, but I can ...
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0answers
62 views

Raspberry Pi requirement for water outflow detection from pump and switch off motor if no water coming

I have gone through this answer before i post question here, https://www.hackster.io/ben-eagan/raspberry-pi-automated-plant-watering-with-website-8af2dc https://mtlynch.io/greenpithumb/ https://www....
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0answers
23 views

Music player for my raspberry pi2

Is there a easy to use music player for a raspberry pi 2? I tried to download one on Google play, but all it did was highlight the install button. going to youtube and searching all the time takes a ...
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1answer
224 views

RPi 2: Could not communicate with wpa-supplicant

Like the title, I updated the Raspbian from Jessie to Buster, and when I restarted my Pi 2 Model B, wlan0 suddenly not associated, I noticed that could be my Wifi dongle problem. But when I get to ...
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0answers
19 views

Printer keeps printing the same document

I have an HP OfficeJet 8710 printer installed on my Raspberry Pi 4b on Ubuntu 19.10.1. Documents sent to the printer keep reprinting until I cancel them with cups on localhost:631. The same networked ...
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2answers
59 views

Multiple Wifi networks - can't connect with VNC

I'm using a Raspberry Pi 2 Model B with a wireless USB adapter, Raspbian jessie. Until today I only had the raspy connected to my home network, everything was fine. Now I have the necessity to bring ...
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0answers
63 views

Loopback SPI interface not working

I'm trying to do the loopback test for the SPI interface on my raspberrypi model 2 B V1.1, by following the intruction on this website : https://www.raspberrypi.org/documentation/hardware/raspberrypi/...

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