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2answers
72 views

How to calculate pull-down resistor resistance

I have a 12V input which I am using a 100k and 20k resistor as R1 and R2 respectively as a voltage divider to feed into a Raspberry Pi GPIO pin. When the 12V signal is switched off, I would like to ...
1
vote
2answers
43 views

Reset predictable Network Interface Names

I have a RPi 4 8GB with the latest Raspberry Pi OS. I have two Wifi-Interfaces: Onboard wifi (first wlan0 -> now wlan1) usb wifi (predictable name wlx00c0cXXXXX) The Onboard wifi named wlan0 till ...
1
vote
0answers
14 views

Cannot change individiual core frequency on Raspberry with cpufreq-set

I used to use cpufreq-set to change the cores' frequency individually on my RPi 3B+, but I noticed that recently I cannot do it anymore. The effect of: sudo cpufreq-set -c 2 -f 1400000 is the change ...
0
votes
0answers
23 views

Pi Zero W resets Arduino Due during power up

I have a setup where my Pi Zero W (Pi0W) is connected to an Arduino Due via OTG cable adaptor. My Pi0W seems to reset the Due again when it's about to finish starting up (around 30-40sec mark). The ...
0
votes
0answers
23 views

How to keep audio in sync with raspivid on a live stream

Raspberry Pi 4 trying to stream live to youtube using an external USB mic and the raspberry camera. The audio slowly gets out of sync (ahead of the video). Here is my command. Any suggestions on ...
1
vote
2answers
39 views

Mounting USB on boot causes error on boot

I am attempting to mount a usb drive to a specific directory at boot time so that it's mapped to the same directory each time. I read this article, Automounting USB drive on boot, that says to add it ...
0
votes
0answers
57 views

Can you setup both Pi-Hole and PfSense on one Raspberry Pi?

I am using a Raspberry Pi 3B+ and I would like to setup PfSense and Pi-Hole on the same device. Is that possible? Any guidelines would be appreciated.
0
votes
1answer
23 views

Can I setup a pir sensor to turn on and off 2 monitors on raspberry pi4?

I am building a raspberry pi 4 system with 2 monitors and would like to know how to turn on and off the 2 monitors with a pir sensor. I am quite a noobie with Raspberry pi so would require a clear and ...
1
vote
2answers
26 views

Broadcast a message from a background job so that it appears on all sessions including the login screen

I'm running a python program as a background job, started by systemd on boot. From this background job, I would like to print messages to the login screen (the screen that's visible on the HDMI output ...
0
votes
1answer
41 views

Turning off and on ad hoc mode on raspberry pi

I setup an ad hoc network between my computer and a pi for a project which works perfectly but when I have the ad-hoc on I have no access to the internet on the pi. There are times I am going to need ...
-1
votes
1answer
36 views

Is it possible to enable 1 Gbit ethernet on RPi 2, 3, 4? [closed]

By default, it seems that the ethernet port on RPi 2 is 100 Mbit. Is there a way (via software) to enable 1000 Mbit ethernet? I also have the same question for RPi 3, and RPi 4.
0
votes
0answers
14 views

What does the iptables related operation in step 11 and 7 of this tutorial do?

this tutorial: https://calap.co/blog/how-to-use-raspberry-pi-as-a-vpn-access-point--2018-10-27.html shows how to turn an raspberry pi into a VPN hotspot. I find the iptable configs at step 7 and 11 ...
1
vote
1answer
16 views

cec controlling other cec enabled device (not TV) - controlling Fire TV from pi

I have a pi connected to the TV and can successfully power on, power off, and change sources on tv with: echo "on 0" | cec-client -s #turn off echo "standby 0" | cec-client -s #...
0
votes
0answers
28 views

Retropie that works fine on a computer monitor but shows no signal in a car

For the same Retropie (4.7.1) on a Pi 3B+ and the same HDMI cable, the Pi works fine on a computer monitor but shows no signal on the display of a car's rear entertainment system. This is an Acura MDX ...
2
votes
0answers
60 views

Using a Kindle Paperwhite screen with raspberry

I recently broke the screen of my Kindle Paperwhite, basically almost 1/3 of the bottom screen is still with the cover image and doesnt get updated. So instead of throwing it away, I was wondering if ...
0
votes
0answers
19 views

Configuring PiTFT with Pi 4 / buster

I've gotten the PiTFT 2.8" capacitive touchscreen to display the console on my Pi 4, using the instructions at that link. However, I can't get it to mirror the HDMI output. I used the buster lite ...
1
vote
3answers
47 views

Control the Raspberry Pi from my Desktop to play music

So I have a not-so-modern audio system (no Bluetooth or something, but AUX entrance), a desktop computer running Linux on the other side of the room, and a Raspberry Pi which I never used lying around....
0
votes
1answer
102 views

Minecraft 1.16.4 on Raspberry Pi 4 fais to launch with errors

I'm getting an error trying to launch 1.16.4. Here are the steps I've done so far: Got Minecraft 1.16.1 with Optifine working on my RPI4 following the steps on the How to setup Minecraft 1.16.1 on ...
1
vote
0answers
55 views

PCA9685 Raspberry pi4B i2c errors

I am trying to get a raspberry pi 4 model B working with across IC2 to a PCA9685 servo motor controller board. I have followed various tutorials e.g: PCA9685 Tutorial Using the libraray : ...
0
votes
0answers
18 views

Redirect Rpi Audio/Mic to Sim module

Raspberry Model: Zero W. External Modules: SIM800L Image Adafruit I2S MEMS Microphone Breakout Small Audio Speaker I'm aiming to make phone calls with the sim800L and 'bind' them with the RPI and I'...
0
votes
1answer
38 views

Using a mobile phone image sensor with a raspberry pi

There is the Raspberry-Pi HQ camera with a very limited number of lenses. I know that there are mounting adapters, but with the 5.5x full frame equivalent of the sensor, finding a wide angle lens is a ...
0
votes
1answer
39 views

Got new router and raspi4 will not connect to wifi

I have a 3d printer hooked to a raspi4 and octopi and everything has been working fine for about 4 months. I just got a new spectrum router and modem. Its still all the same cable internet just new ...
0
votes
1answer
21 views

Stuck in matchbox window

I used nodm and matchbox-window-manager to boot my raspberry pi into a Java application without desktop being shown but I am now stuck in matchbox window and I need access to the terminal. How can I ...
0
votes
1answer
28 views

Get servo position using pigpio

I'm currently developping (improving) an Octoprint plugin that is used to control servo motors with the pigpio library. I always thought that I had to initialize the servos at the start of the code by ...
0
votes
0answers
43 views

how do I set the recording volume using alsa

Is there a guide somewhere on how to use the pi sound system? It would be good to have something definitive as there is lots of stuff out there that contradicts, and it is not like I want to do ...
3
votes
2answers
119 views

How safe is it to connect a Seagate 2TB Expansion Drive to Raspberry Pi 4B?

I wish to build myself a NAS and I figured that a 32GB SDHC (on which the Arch Linux ARM is installed) won't quite cut it. I would very much want to connect my 2TB Seagate Expansion Drive but how safe ...
0
votes
4answers
81 views

What is the proper way to debounce a GPIO input?

I have a project that involves using a Raspberry Pi to sense the state of a mechanical switch (actually, a relay, part of this light beam sensor). When the switch is closed, I want to sound a doorbell....
0
votes
0answers
16 views

Real time treshold crossing on slow signal

I need to acquire an analog signal at a slow sample rate (~100 Hz) with ADC connected to Raspberry pi4 with SPI protocol. I've written a Python routine which should detect a real time treshold ...
1
vote
2answers
44 views

How Do I Keep a CLI Script Running When I Close SSH Session

I am working on Martin F. O'Connor's internet connection monitor (https://github.com/mfoc/monitor-internet-connection), which records Internet Outages. The script runs from the command line ($python3 -...
1
vote
1answer
128 views

Audio not working with Chromium Web Browser but works with VLC

I have a Raspberry Pi 4 with raspbian buster desktop installed which I am using since 1 year to consume media over internet. I am using bluetooth to connect with the speakers and everything was ...
0
votes
1answer
32 views

Real time + High frequency ADC data reading with Raspberry Pi 4

I need to acquire a signal at a minimum sample rate of 10 kHz and processing it real-time using a Python code. Since Raspberry Pi only reads digital signals I get an ADC (High Precision AD/DA Board ...
0
votes
0answers
9 views

What causes problems with multiple USB audio devices on Raspberry Pi 3B?

I wanted to use a Raspberry Pi 3B (rev a02082) to record noise pollution in my neighborhood. This requires multiple microphones, but each one needs only 800 kbps while recording. So I thought that one ...
0
votes
0answers
23 views

Raspberry Pi asking for Username and Password GUI and Pi folder been removed

I installed OpenVPN on my raspberry pi 3b+, I had some problems while trying to connect to the VPN server I tried some solutions after that the terminal on the raspberry pi changed its name. I reboot ...
0
votes
0answers
18 views

Playing from audio from udp using ffplay returning error [Could not initialize SDL - No available video device]

Ive been attempting to play audio from a udp connection using ffplay (pi4 ubuntu) and have been receving Could not initialize SDL - No available video device (Did you set the DISPLAY variable?) as an ...
1
vote
1answer
21 views

Blank desktop problem

On Raspbian, I installed a different desktop environment and selected the wrong one in the terminal and when I rebooted, I went to the MATE desktop environment even though it's not installed. I tried ...
0
votes
0answers
41 views

Can i run Counter Strike 1.6 on Raspberry pi 3b+

I really enjoy fps games and would love to play CS 1.6 but i don't know if it's possible to install on a Raspberry pi. Anyone got any tips?
0
votes
1answer
26 views

Where to put local movie files for Kodi on Retropie?

I have Retropie on a Raspberry 3B+ and Kodi installed on top of Retropie. Both are latest as of Nov 12 2020. The SD card (64GB) has plenty of extra space, so I would like to put some movies in there ...
0
votes
0answers
15 views

My pi keeps disassociating with my wifi

My Raspberry pi 3 keeps disassociating with my WiFi at random and i don't know why. I have tried rebooting the pi and updating it but the issue keeps occurring.
0
votes
0answers
17 views

1-wire setup on PI-4 not working [closed]

The sensor is working on a Zero-W. All connected with a 40 pole connector. So a connection foul is out of the question. After configuration the map 28-...... is not there. it reports 00-.0000000000 ...
1
vote
0answers
20 views

How can I speed up capturing stills with camera module v2 and picamera?

Using some very simple code with no bells and whistles I capture shots of a specimen in between rotations of a motor camera = PiCamera(sensor_mode=2) camera.exposure_mode = 'sports' camera.resolution =...
-4
votes
1answer
57 views

Can I somehow install an OS on my Raspberry Pi rather than “burning it onto the card”? [closed]

I have experimented a lot with my Raspberry Pi over the years since I got it. Mostly, however, it has spent its time collecting dust in the wardrobe, because I always run into show-stopping issues ...
1
vote
1answer
52 views

Is it possible to make a WIFI to LAN Bridge with the RaspberryPi3b and Bridge Utils?

I am currently trying to make a bridge between the Wifi and Lan on the Raspberry Pi 3b with Raspberry Pi Os Lite for an Assignment. The Task is to connect the Raspberry to the Wifi and then Bridge it ...
0
votes
0answers
27 views

How to configure eth0 as point to point

I'm porting a software from Windows to Linux and I must connect my RPi4 to a microcontroller via ethernet. These are the connection parameters: IP Address: 10.10.20.1 Subnet Mask: 255.240.0.0 Gateway: ...
0
votes
0answers
13 views

Raspberry Pi3B is new. I am using it as a companion computer for my ROV together with my FC

on my second test while testing the pi with a usb camera, HDMI connected, ethernet cable linked to my laptop and micro USB hooked up for power which is similar to my other ROV setup. On this boot up i ...
0
votes
1answer
45 views

capture a single value from an analog joystick

I am attempting to trigger an event with a particular value of an analog joystick y axis in a while loop. I have used in an if statement ==, >, <, <>, >= . Because the readout (print ...
1
vote
1answer
31 views

problem with wlan0 on a rpi4 with raspbian + kodi

not sure if this is where i should be posting this, I've been using rpi 4 for a year now, and lately, it looks like wifi is disconnecting randomly (like a month ago i moved and now the raspberry is ...
0
votes
1answer
47 views

Monitor the power consumption in real-time (in Ampere or Watt)

I'd like to monitor in real-time the power consumption of a RPi. (0.5A, 1A, 2A, etc.) I know this can be done with a multimeter in ammeter mode in series, but I thought maybe there is an easier method,...
1
vote
0answers
33 views

I2C device detected on arduino and raspberry pi 3 but not on raspberry pi 4

I have a fresh installation of raspbian (Linux raspberrypi 5.4.51-v7l+ #1333 SMP Mon Aug 10 16:51:40 BST 2020 armv7l GNU/Linux) on a raspberry pi 4. I have enabled i2c and nothing else. I have ...
0
votes
0answers
27 views

Connect to wifi on book

I have a relatively fresh install of RetroPie that won't connect to wifi on boot. (I'm copying these configs by hand) /etc/wpa_supplicant/wpa_supplicant.conf country=US ctrl_interface=DIR=/var/run/...
0
votes
0answers
57 views

RTSP streaming works in VLC media player but not in Python OpenCV

I have Logitech C920 USB webcam connected to my rPi 4 4GB model. I want to stream the video feed through rtsp. The following command runs on the pi: cvlc -v v4l2:///dev/video0:chroma=mp2v --v4l2-width ...

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