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0 votes
2 answers
88 views

How can i set up my owm serial communication between two Raspberrys?

i have following Problem: I have A raspberry Pi 3B+ with a Touchscreen, which uses every Single Pin on the 40Pin GPIO header. The only thing i have is a i2c breakout on my Touchscreen. But i have the ...
0 votes
1 answer
837 views

SIP Generator Error Installing ROS Melodic on Raspberry Pi 4

I've been attempting to install ROS Melodic on my Raspberry Pi 4 (running Raspbian Stretch) according to the instructions on this webpage: [https://www.instructables.com/id/ROS-Melodic-on-Raspberry-...
-2 votes
0 answers
14 views

How to capture and transfer images capture by raspberry pi camera to the laptop using python code?

I am working on project of user interface that automatically captures images from raspberry Pi and send it to laptop over ssh. I want to write python code on laptop that automatically ssh raspberry pi ...
10 votes
6 answers
12k views

Raspberry Pi 4: turn red LED off (via software)

I have an RPI 4 in my room. When I sleep the red light fills a big part of the room. I don't want to turn the pi off as I want 24/7 availability. Its ability to be quiet and always available is why I ...
1 vote
4 answers
3k views

Installing an executable or MicroPython script on a Pico to run without a computer attached

I've searched and not found an answer.. I'm proficient in C and Micro-python and developing and running programs is easy enough. However I can't figure out how I install a program I've written to ...
75 votes
12 answers
131k views

How can I remove the GUI from Raspbian/Debian?

I would like to know how to completely remove X.org and all GUI-related components from Raspbian or soft-float Debian. The most obvious solution would be sudo apt-get purge xorg, but I am afraid that ...
-2 votes
0 answers
28 views

WIFI wireless safety

I have an internet box with a wifi access point. I have a raspberry which is connected to this wifi access point. Everything works fine. But, at night, i want to stop wifi communications. I can't ...
0 votes
1 answer
9 views

I am using Raspberry pi 4b, when I try to connect with wifi a problem could not communicate with wpa_supplicant

I am using lite os (for using open media vault 5). Yesterday I use my wifi with my pi and it works fine. But after install OMV5 I tried to connect with my wifi but a problem occurred. It says Could ...
0 votes
1 answer
192 views

Changed router, now cant SSH into Pi: Connection refused

I used to be able to SSH into my pi on my home network on port 22 all the time. Worked fine. ssh pi@192.168.1.34 I changed my Vigor Draytek router to an ASUS TUF Gaming AX5400, which assigns a ...
0 votes
2 answers
40 views

Trouble connecting raspberry pi to laptop

I am new to raspberry pi, I am following this tutorial https://beebom.com/how-use-windows-laptop-as-monitor-raspberry-pi/#:~:text=Use%20the%20ethernet%20cable%20and,port%20as%20a%20power%20source. I ...
0 votes
1 answer
3k views

Libqtgui4 is not available (Has no installation candidate)

Trying to run this command: sudo apt-get install libqtgui4 libqtwebkit4 libqt4-test python3-pyqt5 Package libqtgui4 is not available, but is referred to by another package. E: Package 'libqtgui4' has ...
2 votes
1 answer
16k views

Turning off the blue status LED on the logitech C920 usb camera? [closed]

I am playing around with the logitech c920 connected to a Raspberry Pi 4 and being used as a baby monitor. Hence I would like to turn off the blue status light if possible; preferably via unix command ...
0 votes
2 answers
432 views

I think I fried my RPi

I am working on two stepper motors and trying to control them using RPi3(Ubuntu mate) with A4988 motor drivers. I successfully managed to drive the motors with external 12V battery source. After ...
0 votes
0 answers
10 views

Attribute: 'ModbusIOException' object has no attribute 'registers'

I try to follow exactly this video https://www.youtube.com/watch?v=ZlHqEOmvW6M You can have a look what I do : https://drive.google.com/file/d/1LenDiJVxT8wQUOlMbdDZ_VkIzqLvHmLJ/view?usp=sharing I will ...
0 votes
0 answers
26 views

How to open website with Python with 'sudo' permission?

I am writing a Python script to run on Raspbian that opens a webpage using webbrowser.open() and also writes to the GPIO pins to control some external LEDs. The problem is that writing the GPIO pins ...
0 votes
1 answer
76 views

Raspberry PI 4 gets stuck after few days of working

Could not find help for this issue in this nor any forums I have finally integrated system with desired few apps (HA over docker, Node-red and Grafana) and temperature/Power measurements using 1-wire ...
3 votes
3 answers
5k views

Controlling Raspberry Pi GPIO with c and Python

I was searching for C and Python Libraries which support Pi4.
0 votes
1 answer
22 views

whats the difference between systemd service and running app directly?

In what ways are things different when running an app directly as a user, vs running the same app as a service with systemd? I wrote an app to play audio cues on my RPI. It is working perfectly when I ...
0 votes
0 answers
10 views

How Can I modify Wifi Proxy manual in raspberry pi?

I can change proxy manual in my android phone But on raspberry pi There is no wifi settings so How can I change the proxy manual in my raspberry pi
0 votes
1 answer
24 views

Spi wrong voltage

Obviously, my spi is not happy. MISO and MOSI were idling around 1.5v instead of 3.3 so I added a 10k pull up, and that helped a bit, but as you can see, it's still not good. It idles around 2.8v ...
0 votes
1 answer
574 views

Raspberry pi screen rotation with OpenGL

As titled, in raspianLite, if I enable OpenGL (fake KMS) I'm unable to rotate the screen using the /boot/config.txt file i tried: display_hdmi_rotate=1 and display_rotate=1 with no success, any ...
0 votes
2 answers
24 views

How to create a data signal using pwm from a gpio output?

I'm a new member of the raspberry pi community and I have problems with starting my first project. I want to be able to create a data signal using pulse width modulation with the gpio headers. The ...
1 vote
1 answer
3k views

Rpi3b+ to Rpi3b+ jtag/SWD connection and OpenOCD

I'd like to hook together two Raspberry pi 3b+ to use jtag/SWD with OpenOCD. I learned it can be done, but implementing it has proven challenging. I have two questions: How to connect the Rpi's. If I'...
0 votes
1 answer
22 views

Can camera be placed in hermetic box

I want to use my Raspberry Zero camera OV5647 (with transistors on a wire) on air so I need to protect it from rain and corrosion. I want to place it in a hermetic waterproof plexiglass box but should ...
0 votes
1 answer
22 views

Autostart syncthing after reboot

I have installed syncthing on my Raspberry Pi but it does not start automatically. How can I run it automatically after a reboot?
0 votes
2 answers
339 views

RetroPie won’t start up after I manually shut it down

I just setup my RetroPie and tested out a game. I then shut it off using the power button. When I tried starting it up again it doesn’t go past this screen. I unplugged it for an hour and tried again ...
2 votes
1 answer
262 views

RPi 4 second HDMI port does not seem to support CEC

When using the cec-utils on a Pi-4 with 2 HDMI devices connected, the one connected to HDMI1 does not respond to commands or show up in a scan. Running cec-client -l only shows 1 device. Is there ...
0 votes
1 answer
72 views

Share internet connection from a pi 4 to a pi 0 non W via USB

I connected a raspberry pi 0 to a raspberry pi 4b+ via USB and i would like to know how can i share the internet connection. The pi4 is connected to the internet via the ethernet port. P.S.: I did all ...
0 votes
0 answers
33 views

How to create small SD Card Images?

The builtin SD Card Copier tool can create copies smaller than the system sd card, so it can be used for cloning the system into smaller cards. Is there a similar tool (running on any os) for creating ...
0 votes
0 answers
21 views

Why VGA VSYNC and HSYNC need 47 Ohm resistors in this schematic?

In Chapter 3 in this document there is a schematic showing a connection to VGA: https://datasheets.raspberrypi.com/rp2040/hardware-design-with-rp2040.pdf Why is there a 47 Ohm resistor connected to ...
0 votes
1 answer
2k views

Make wifi onboard as an access point and wifi dongle as a client

I want to turn my raspberry pi 3 witch installed Raspbian OS to access point and client to access wifi and bridge these two each other (in this question it's better to skip this bridge part). Exactly, ...
0 votes
0 answers
18 views

dhcpcd creates and deletes veth* interfaces in thousands

I run a RPi4 (4GB) with Raspbian 10 (buster) from a SSD. It's running docker containters with nginx, nextcloud, pihole and some others. The RPi crashes from time to time. I found out it runs out of ...
0 votes
0 answers
13 views

RasPi Kubernetes Cluster and USB devices

I plan to cluster 4 raspberry pi 3b systems. If I use the USB in one of the non controllers will the controller acknowledge the device i.e. wifi. I created a cluster using kubernetes. I am new to ...
0 votes
2 answers
776 views

Cannot install pi-apps

So I've recently tried to install pi-apps using: git clone https://github.com/Botspot/pi-apps and it cloned, but when I used: /home/pi/pi-apps/install it gave me this error: The command 'sudo apt ...
0 votes
1 answer
50 views

/dev/i2c is not showing Raspberry Pi4 running on Android

I am using AOSP android 11 in the RPi4. I have enabled the i2c in config.txt using the param dtparam=i2c_arm=on. The i2c is showing in the /sys/bus/i2c/devices/i2c-1 but /dev/i2c is not listing in the ...
11 votes
2 answers
121k views

How to open a port?

I need to open the 25 TCP port on my Raspberry Pi 3, I watched videos on the internet (iptables) nothing works, if you have a solution, using iptables or another method, that would be great. If you ...
0 votes
1 answer
40 views

Programmatically check if a VNC client is connected

I want to be able to check from with a python script whether a VNC client is connected. VNC Connect knows this and changes the colour of the VNC icon on the desktop. I want to capture this status ...
2 votes
3 answers
5k views

Wifi after upgrade to bullseye is blocked by rfkill

I recently updated my RPi-3B to bullseye. Since then I am not able to connect it to my wifi. It shows the following message when I login Wi-Fi is currently blocked by rfkill. Use raspi-config to set ...
1 vote
1 answer
36 views

Bluetooth Ignition need help smoothing out functionality

Hello I have been working on a Bluetooth authorized push to start ignition in my truck. Right now its installed and working but I would like to change the function of the button and shorten the time ...
0 votes
0 answers
9 views

Can a RPi be network booted with an NFS other than NFSv3?

Please excuse me if I am asking this question in the wrong place: I'm trying to network boot Ubuntu 22.04 on a Raspberry Pi 4B, and I'm not entirely clear where Raspberry ends and Ubuntu begins :-) ...
0 votes
0 answers
16 views

Different UART behavior between ttyS0 and ttyAMA0

I'm using serial to communicate with this board (Serial-CAN-Board) on a RPi4. UART is enabled with enable_uart=1 Console over serial has been disabled with raspi-config and I am using SSH over ...
292 votes
6 answers
1.3m views

How do I set up networking/WiFi/static IP address on Raspbian/Raspberry Pi OS?

I have followed (any one of hundreds) tutorial, and it does not work. How do I set up networking/WiFi/static IP address on the Raspberry Pi? After the Foundation introduced the dhcpcd networking ...
0 votes
1 answer
142 views

PI 3 B+ boots, shows welcome screen then screen fades to white

I am using the 7" official Raspberry pi touchscreen. I have checked all of the connections. When I plug the pi into an HDMI screen it works fine, but if I connect the 7" screen via the ...
0 votes
1 answer
304 views

Communication between Raspberry pi and Android studio Application

I've created a mobile application using android studio to control some leds, sensors, and locks. So I'd want to connect my mobile application to my raspberry pi to send and receive data, how could I ...
0 votes
1 answer
36 views

Heatbed module control with Raspberry Pi 3+

I want to control a nichrome wire with the PWM signal from a Raspberry Pi. The MOSFET modules that can be found on the net for the combination with a Raspberry became much too hot. So I decided to try ...
-1 votes
1 answer
140 views

How to pair internet over usb (win10) on PiZero?

I've done it before on PiZero and was working being able to ping websites. I've reinstalled Rasberian Jessie on my SD done the same steps but now when I ping I get: pi@raspberrypi:~ $ sudo ping www....
0 votes
0 answers
13 views

How to get an Adafruit 16x2 Character LCD kit to print information at startup running in headless mode [closed]

I'm using the following kit to print to an LCD: https://learn.adafruit.com/adafruit-16x2-character-lcd-plus-keypad-for-raspberry-pi and the associated python classes / library the webpage lists. I've ...
0 votes
3 answers
375 views

Possible to Power RPi 3 & Touchscreen with Old Intercom Wires?

So this question could be a dumb one, as I have little to no experience with electricity. Anyways, here it is: My current project is using the RPi Official Touchscreen (7 inches), along with a RPi3 ...
0 votes
1 answer
97 views

PXE Boot, how to make it default to pxelinux.cfg/default?

I am transitioning a Centos Mini PC acting as a kickstart server to a freed up Pi4b. I am running Raspberry OS 10. The problem I have is it is trying to boot the MAC address sequence under pxelinux....
0 votes
2 answers
45 views

Raspberry Pi: Unable to reboot (unable to mount root fs on unknown-block(179,2) - on brand new sdcard/image

I got some new Sandisk 32gb Ultra sdcards installed Pi OS on them etc - but when booting the Pi they gave the error in the title - all the same.

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