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.
1,564
questions
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Raspi 2 v1.1 freezes randomly
I set up my old Raspi2 v1.1 a few days ago, but its behaving strange.
It freezes / hangs up after some time.
Things I've tried so far:
Swapped out my sdcard for a different one
Copied the os to an ...
0
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0answers
33 views
Raspberry PI and 8 module relay board
I have a raspberry pi 2 and an 8 module relay board (http://nettop.gr/index.php/en/hlektronika/relay/8-channel-5v-relay-module-with-light-coupling-5v.html).
Between the relay board and the raspberry I ...
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0answers
17 views
VPN working? or not? How do I know?
I have what appears to be a working VPN on my Pi2 with Raspbian which I can access from an Android mobile phone and a Nexus 7 using PureVPN
What I cannot determine is whether it is actually working ...
0
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1answer
27 views
Why here capacitors of 0.1uf and 100uf are used?
What is the use of these two capacitors here. The circuit is working just fine without them also.
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0answers
7 views
Yocto linux on rpi 3b+, bootup issue. mmc1 is not getting hardware interrupt
I tried to bootup rpi 3b+ with yocto-linux(kernel v4.19)(console image) but its not booting up. I suspect its something related to i2c or interrupt.
Note : I have taken care of device tree and overlay....
0
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1answer
110 views
DHT 11 sensor not found, check wiring
I am using raspberry pi 4 model b and sensor DHT 11 for checking the humidity and temperature. When I am using the code DHT.py, the result is:
1604263139.922 4 3 0.0 0.0
1604263142.192 4 3 0.0 0.0
...
0
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1answer
51 views
Using pi as router
What is the minimal config needed, to be able to specify some static route for network subset (eg 10.199.0.0/16), so that my raspberry redirects to internal PC?
LAPTOP (pink) is connecting via VPN to ...
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0answers
14 views
Is there an Arch derivative for Raspberry Pi 2 that has desktop environment preinstalled?
I have a Raspberry Pi 2B, and want to install an Arch based distro on it. Is there a derivative of Arch that supports Pi 2B and also comes with desktop environment preinstalled?
Arch Linux Arm ...
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0answers
24 views
How to install Lantern Pro for Raspberry Pi 4b? [duplicate]
I have a lantern pro account, I want to install and use it for my Raspberry Pi 4B
How to install Lantern Pro for Raspberry Pi 4b?
0
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1answer
34 views
Installing OpenCV fails for missing header files
I am trying to install opencv 3.0.0 on my raspberry pi 2b but I keep running into erros... currently, it complains about the following missing header files when I run the following cmake command:
...
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20 views
Cannot change display resolution from 640x480
I have a Raspberry Pi 2 Model B. which I use to auomate a couple of things in the house. I connected a relatively old Full HD display which has VGA input, by using a HDMI to VGA adaptor.
The display ...
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3answers
43 views
power supply specification
are there any public requirements (which I have not found) specifing power supply ramps / gradients
e.g. is there a spec like from 0 to 5V in 5ms or faster
also when turning of, is there any ...
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0answers
57 views
Installing php7.4 + MySql on Stretch with nginx
I want OwnCloud and I am trying to install PHP 7.4 on Raspbian GNU/Linux 9 (stretch) following @janw's tutorial but facing some errors:
E: Unable to locate package php7.4-… then I was able to solve ...
2
votes
2answers
60 views
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 ...
0
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1answer
75 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@...
2
votes
3answers
110 views
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 ...
0
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0answers
34 views
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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0answers
31 views
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 ...
0
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1answer
38 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 ...
0
votes
1answer
30 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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0answers
9 views
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 ...
2
votes
3answers
107 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. ...
0
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1answer
28 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 ...
0
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2answers
46 views
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 ...
0
votes
1answer
25 views
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 ...
1
vote
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 ...
0
votes
1answer
41 views
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 ...
1
vote
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 ...
-1
votes
1answer
65 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 ...
0
votes
2answers
179 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 ...
0
votes
2answers
28 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 ...
1
vote
1answer
44 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 ...
0
votes
1answer
64 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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vote
2answers
221 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....
0
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0answers
18 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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0answers
59 views
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 ...
2
votes
3answers
62 views
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 ...
0
votes
1answer
292 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 ...
1
vote
1answer
30 views
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 ...
0
votes
0answers
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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votes
1answer
15 views
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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vote
2answers
145 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 ...
0
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0answers
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 ...
0
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0answers
42 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 ...
1
vote
1answer
560 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:~ $ ...
2
votes
1answer
47 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 ...
0
votes
1answer
43 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 ...
2
votes
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 ...
0
votes
1answer
91 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 ...
2
votes
2answers
294 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?
