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by topguy
Mon Dec 05, 2022 11:26 am
Forum: Graphics, sound and multimedia
Topic: Upgrade to Webcamoid 9.0?
Replies: 1
Views: 168

Re: Upgrade to Webcamoid 9.0?

Neither their web-page or github contain pre-compiled packages for ARM/Raspbian as far as I can see.
by topguy
Wed Nov 30, 2022 12:37 pm
Forum: Networking and servers
Topic: What 4G or 5G modems or chip sets to use?
Replies: 8
Views: 382

Re: What 4G or 5G modems or chip sets to use?

In my experience its a good idea to mention which country you are in.
Do you have requirements to physical size or enviromental factors ?
by topguy
Tue Nov 22, 2022 10:31 am
Forum: Beginners
Topic: Tensorflow Installation issue Raspberry Pi
Replies: 1
Views: 74

Re: Tensorflow Installation issue Raspberry Pi

We would need a link to a guide you followed or for you to show *how* you installed everything. Python is a bit tricky since it matters if you install the modules as system modules or just for a specific user or if you are using virtual environments or not. Typical errror like using "pip" ...
by topguy
Mon Oct 24, 2022 12:33 pm
Forum: Python
Topic: RFID RC522 and "pi-rc522"
Replies: 5
Views: 407

Re: RFID RC522 and "pi-rc522"

Using an Android smartphone app ( NXP TagInfo ) to identify what kind of tags work which don't, would be helpful.
by topguy
Wed Oct 05, 2022 10:21 am
Forum: Beginners
Topic: Using a raspberry pi as an external monitor
Replies: 13
Views: 670

Re: Using a raspberry pi as an external monitor

But what kind of machine is it going to be an external monitor to ? Does that machine have its own display ? Do you want the "external monitor" to show a copy of what is showing on the other screen or behave as an extended desktop. Not many systems I know that would support such a thing ( ...
by topguy
Wed Oct 05, 2022 10:11 am
Forum: Beginners
Topic: Stuck in Recalbox
Replies: 1
Views: 84

Re: Stuck in Recalbox

Why would there be a Chromium desktop on your Pi ?
I dont remember there being a chromium desktop as part of RecalBox.. but its been a while since I tested it..
You change the SD card to change the OS.
by topguy
Wed Sep 28, 2022 8:51 am
Forum: Advanced users
Topic: Make system image on another device
Replies: 10
Views: 519

Re: Make system image on another device

In my opinion "dd" is still usable for your scenario, but you will have to wait for the copy of the whole 64GB regardless of how much data is in the partition. You have the option to shrink the partition on the "from" stick before dd'ing just enough data ( using "bs" an...
by topguy
Mon Sep 19, 2022 12:31 pm
Forum: Troubleshooting
Topic: Shutdows Raspberry Pi when USB Flash Drive is Inserted
Replies: 2
Views: 261

Re: Shutdows Raspberry Pi when USB Flash Drive is Inserted

I gave it the name "shutdown". What exactly do you mean by "gave it the name" ? Did you label the filesystem on the drive ? Anything on the driver is not part of the USB information available to udev. To list USB information you use "lsusb -v" example using a random me...
by topguy
Wed Sep 14, 2022 10:04 am
Forum: Networking and servers
Topic: Adding custom cable network adapter
Replies: 1
Views: 382

Re: Adding custom cable network adapter

This is a very old guide, but maybe it still works or can give you hints about what to google....

https://stackoverflow.com/questions/442 ... vice-match
by topguy
Mon Sep 05, 2022 9:30 am
Forum: Troubleshooting
Topic: Desktop oversized on CRT TV
Replies: 10
Views: 415

Re: Desktop oversized on CRT TV

The concept of "overscan" comes from CRT displays and how much overscan it has varies a *lot*. Some TVs had service menus where you could manipulate this. Have you tested uncommenting these lines: #overscan_left=16 #overscan_right=16 #overscan_top=16 #overscan_bottom=16 I would consider en...
by topguy
Thu Sep 01, 2022 10:13 am
Forum: Graphics, sound and multimedia
Topic: building Blender 2.79 / install
Replies: 2
Views: 440

Re: building Blender 2.79 / install

Which model of Pi is your Pi ?
Are your OS up to date ?

There is no ARM/Linux build of blender in that link you posted.

An earlier thread:
viewtopic.php?t=290509

I would suggest trying the standard install first:

Code: Select all

sudo apt install blender
by topguy
Tue Aug 23, 2022 2:16 pm
Forum: Beginners
Topic: How to add icon in GUI on Raspbian OS
Replies: 3
Views: 150

Re: How to add icon in GUI on Raspbian OS

Do you mean:
How to set the icon of application on the start-bar at the bottom ?
or
How to set the icon of a shortcut on the desktop that you click to start the application ?
by topguy
Tue Aug 23, 2022 9:36 am
Forum: Graphics, sound and multimedia
Topic: ALSA warnings / errors with PyAudio script
Replies: 1
Views: 394

Re: ALSA warnings / errors with PyAudio script

In general Linux audio is a mess.. There are usually multiple sound APIs to choose from but not all of them might be configured correctly.. I can see pyAudio going trough "ALSA", "PulseAudio" and "Jack" looking for some audio hardware and that is what is causing all the...
by topguy
Thu Aug 18, 2022 9:38 am
Forum: Camera board
Topic: error trying to stream libcamera
Replies: 4
Views: 590

Re: error trying to stream libcamera

Can you provide a link to the guide you are following ? libcamera-vid: symbol lookup error: /lib/arm-linux-gnueabihf/libcamera_app.so: undefined symbol: _ZNK9libcamera11ControlList8containsERKNS_9ControlIdE Does the application exit after printing this error ? Its weird if you have a mismatch betwee...
by topguy
Thu Aug 18, 2022 9:17 am
Forum: Troubleshooting
Topic: vlc/cvlc on bullseye doesn't display JPG files
Replies: 4
Views: 301

Re: vlc/cvlc on bullseye doesn't display JPG files

Meanwhile I found out: Older photos in JPG format have no problems. They are displayed as expected. It is probably due to the resolution. My old photos have a resolution of 2.4 mega pixels, the new ones of 20 mega pixels. Is there anything I can do to the Raspi's settings to cope with the higher re...
by topguy
Wed Aug 17, 2022 11:11 am
Forum: SDK
Topic: Improve Serial USB Speed
Replies: 5
Views: 861

Re: Improve Serial USB Speed

Is there an alternative to printf in C?
write()
by topguy
Mon Aug 15, 2022 10:01 am
Forum: Graphics, sound and multimedia
Topic: Post Photos to HTML with PI Webcam
Replies: 3
Views: 248

Re: Post Photos to HTML with PI Webcam

HTML/CSS/Javascript all run on the client side. Grabbing the picture from the camera needs to happen on the server side so you need code that runs there. There are commonly two methods for that, CGI and PHP. ( https://httpd.apache.org/docs/2.4/howto/cgi.html ) CGI programs/scripts can be written in ...
by topguy
Tue Jul 19, 2022 1:22 pm
Forum: Graphics, sound and multimedia
Topic: Frame rate question (blurry image)
Replies: 6
Views: 469

Re: Frame rate question (blurry image)

If the camera has a 1/30s shutter speed and screen refresh is 60fps and game is running > 60fps the camera will be exposed to *two* frames.

But maybe the screen just has really bad LCD refresh times ( I mean it says LG ;-) ), is it a Monitor or really a TV ?
by topguy
Mon Jul 18, 2022 5:27 pm
Forum: Graphics, sound and multimedia
Topic: Frame rate question (blurry image)
Replies: 6
Views: 469

Re: Frame rate question (blurry image)

Having FPS higher than screen refresh rate should normally give tearing and not ghosting..
may be worth checking what resolution and refreshrate Ubuntu thinks your screen have..

Test on different display.
by topguy
Mon Jul 18, 2022 2:20 pm
Forum: Troubleshooting
Topic: GPG error
Replies: 1
Views: 194

Re: GPG error

None of those sources are official ones, they have been manually added to your system... Also "jessie" ( Debian 8 ) was originally released in 2015 and is getting pretty old.. support might be dropped.. You can just remove those entries from the registered apt-sources and the errors should...
by topguy
Mon Jul 18, 2022 2:08 pm
Forum: Troubleshooting
Topic: Error "Unable to detect a usable serial port"
Replies: 1
Views: 138

Re: Error "Unable to detect a usable serial port"

- test with a powered and maybe also an unpowered USB hub..
- buy a new modem..
by topguy
Mon Jul 11, 2022 12:55 pm
Forum: Other programming languages
Topic: Raspberrypi connect to Meta Quest 2 using Bluetooth
Replies: 4
Views: 772

Re: Raspberrypi connect to Meta Quest 2 using Bluetooth

I have already succeeded in connecting Rasberrypi to Quest 2.
Which protocol/profile did you use for this connection. ( https://en.wikipedia.org/wiki/List_of_B ... h_profiles )
The serial-port profile seems very suitable for sending custom data..
by topguy
Fri Jul 08, 2022 1:15 pm
Forum: Other programming languages
Topic: Raspberrypi connect to Meta Quest 2 using Bluetooth
Replies: 4
Views: 772

Re: Raspberrypi connect to Meta Quest 2 using Bluetooth

The Meta Quest is basically an Android device. It supports BT keyboard/mouse in system, but I have never tried to pair some random BT device. But its quite possible you can do this connection inside your application. Some example library for Pi to Android Phone BT communication. https://bluedot.read...

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