Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

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1500 questions
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3 answers

How can I lower my boot time more?

After removing most of the services that I don't need, it still takes about 28 seconds to boot, take a picture and shut down. I would like to lower this even more, and I did a systemd-analyze blame and got the following: 7.476s…
Radu
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Raspberry Pi and realtime audio effects / digital signal processing?

I'm trying to understand if it would be possible (and, in case, what is the best approach) to build an "effect box" which could take an analog signal (from a guitar or a microphone), change it in realtime in order to apply some "audio effects" (from…
Luke
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Entrusted Certificates installation

I have a very noob problem with my Raspberry Pi 3b (all updated to latest stable version available). I want to use it to automate some scripts I've written in R that run smoothly on my Win10 machine under R 3.4.3 within RStudio. As I move to the…
Ceschi
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3 answers

BCM2835 on an RPi 3?

I recently purchased a Raspberry Pi 3, which I understand to have the BCM2837 chip. When I purchased a codec from raspberrypi.com, I was asked to run: cat /proc/cpuinfo I was surprised to see the following output at the bottom: Hardware :…
D. MacGrouther
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2 answers

The File "etc/network/interfaces" is basically empty

I've been trying to setup the Pi as a WiFi AP, so that I can use it in Hotels to allow multiple devices to use the same WiFi connection. On the net there are multiple tutorials on how to do this. Such as: Pi 3 as a Wi-Fi Repeater All works well up…
Chris
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11
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What is the difference between rpi-update and sudo-apt upgrade?

I'm wondering what the difference is between running the git-hub obtained program rpi-update and using sudo apt-get update followed by sudo apt-get upgrade. I've checked around and cannot find the differences listed anywhere. Is one preferred over…
Huntrods
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11
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1 answer

How to use Raspberry Pi 3 as a USB gadget

How can I use Raspberry Pi 3 as a USB gadget. Is there any way? How can I enable the USB gadget mode on Raspberry Pi?
Naveen
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11
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4 answers

Auto-refresh for Midori

I'm using Raspberry Pi to create a non-interactive web kiosk - a specific webpage (measurements from a remote monitoring station) to be displayed on a screen in full screen mode, content refreshed frequently through AJAX. Now there are quite a few…
SF.
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Self destruct: self erase all data on SD card using shred, dd or some other method

I will be using a Raspberry Pi as an air-gapped computer to make secure encrypted transactions on the Ethereum BlockChain. Once in awhile I will want to update the software I am using which will mean taking the SD card out of the Pi and inserting…
John Shearing
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4 answers

How to keep watchdog timer running during reboot/shutdown

In my research so far I've noticed there are two approaches to activating a watchdog timer on raspberry: using systemd or installing watchdog. It's all explained well here: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=147501# And I've…
Duje
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11
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2 answers

Loop doesn't work unless I use 'print'

This code does not turn the led on and off. import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(21,GPIO.OUT) for number in range(0,10): GPIO.output(21,GPIO.LOW) time.sleep(1) …
tazboy
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11
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2 answers

How to change a password

I'm trying to change the password on my RPi 3. I've tried sudo passwd and it gets me to the screen where I can enter a new password, but then the terminal stops letting me type. Does anyone know how to work around this? I've also tried sudo…
user67265
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11
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1 answer

Using additional GPIOs as digital I/O?

hopefully this question is rather simple but my quick googling did not find the answer. I know that the RPi has several GPIOs that I can use as well as specialized GPIOs (SPI, I2C, UART, etc). In my project I am actually running out of the regular…
Andrew Corsini
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11
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3 answers

Auto mount USB stick on plug-in without UUID

So, I'm making a media center. I need the Pi to auto mount ANY USB stick I plug in. No mater what filesystem (vfat,NTFS,ext). I searched everywhere, and couldn't find anything that works. Well, usbmount partially works. I can't get it to mount NTFS…
pauliucxz
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11
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Is Linuxbrew available on Raspberry Pi, and if yes, how do I install it?

I need Linuxbrew for a certain application, and how can I acquire Linuxbrew?
Human
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