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by ghans
Tue Jun 25, 2019 5:08 am
Forum: Graphics, sound and multimedia
Topic: [Advice needed] live HDMI in + dynamic text => HDMI out, w/textual overlay
Replies: 2
Views: 71

Re: [Advice needed] live HDMI in + dynamic text => HDMI out, w/textual overlay

How much latency is acceptable to your buddys father ? 400 ms ? 100 ms ? Less ?

ghans
by ghans
Sat Jun 22, 2019 6:35 am
Forum: Deutsch
Topic: Backup Raspberry SD Karte
Replies: 7
Views: 261

Re: Backup Raspberry SD Karte

Warum nicht gleich rsync verwenden ? Vorrausgesetzt, das NAS unterstützt dies (d.h. es läuft ein frei zugängliches Linux auf dem NAS)

ghans
by ghans
Fri Jun 14, 2019 4:02 pm
Forum: Beginners
Topic: How would I only boot into one program and not a full blown OS
Replies: 13
Views: 409

Re: How would I only boot into one program and not a full blown OS

The startup manager on Raspbian is called systemd. You probably want to write a "systemd unit" file to start your program in a fast yet controlled manner (after network is up etc.)

ghans
by ghans
Mon Jun 10, 2019 8:47 pm
Forum: Advanced users
Topic: Remote data access via RPi
Replies: 3
Views: 213

Re: Remote data access via RPi

The name and model number of the logger would be interesting, along with a description of the cable(s) used to connect it to laptops/PCs.

ghans
by ghans
Sat Jun 08, 2019 7:08 am
Forum: Raspbian
Topic: Is Rasbpian legal in the USA?
Replies: 16
Views: 803

Re: Is Rasbpian legal in the USA?

The Raspberry Pi includes a h.264 hardware codec, with appropriate license from MPEG-LA included in the base price. Users can buy additional licenses for MPEG2 and/or VC-1 via a dedicated webshop run by Raspberry Pi. Raspbian is based on Debian, which has followed (still follows ?) a relatively cons...
by ghans
Fri May 31, 2019 4:48 am
Forum: General discussion
Topic: Extend display from WinCE6 via Raspberry and VNC
Replies: 5
Views: 254

Re: Extend display from WinCE6 via Raspberry and VNC

Which VNC server did you install on Windows CE ? Do you have a link ?

ghans
by ghans
Tue May 21, 2019 8:55 am
Forum: Troubleshooting
Topic: [Solved] Suspicious Network Activity?
Replies: 14
Views: 593

Re: Suspicious Network Activity?

You did change the default password, didn't you ? Otherwise SSH bots will own in minutes, literally.

ghans
by ghans
Fri May 10, 2019 7:30 pm
Forum: General discussion
Topic: [SOLVED] How do I run a Raspbian virtual desktop inside Raspbian?
Replies: 24
Views: 1101

Re: How do I run a Raspbian virtual desktop inside Raspbian?

I would rather not use QEMU, mainly because it is meant to simulate non-native machines and CPU architectures. Since I do not wish to simulate a entirely different machine, I see no reason to use QEMU. Please understand the difference between QEMUs TCG "accelerator" and QEMU with KVM acceleration. ...
by ghans
Fri May 10, 2019 7:31 am
Forum: General discussion
Topic: [SOLVED] How do I run a Raspbian virtual desktop inside Raspbian?
Replies: 24
Views: 1101

Re: Can I have a Raspbian virtual machine on Raspbian?

QEMU supports KVM acceleration. This way, you can run Raspbian or Windows 10 Pro (AARCH64) "inside" Gentoo.

For perfomance reasons, you should only try it on the Raspberry Model 3B+. Search for the posts of forum member "sakaki".

ghans
by ghans
Wed May 08, 2019 10:41 am
Forum: General discussion
Topic: Another litecoin mining question.
Replies: 2
Views: 167

Re: Another litecoin mining question.

Use "tmux" or "screen". Start tmux or screen, and then start your mining software inside the new session. You can now "detach" from this screen/tmux session and "reattach" at any later time. Even if your Internet connection gets lost, the session will continue to run uninterrupted allowing you to ma...
by ghans
Mon May 06, 2019 9:21 am
Forum: Beginners
Topic: Home networking
Replies: 3
Views: 332

Re: Home networking

Without detailed information on the CCTV system i can't help you. But i believe in your current situation you will need one Raspberry per TV, not one for both.

ghans
by ghans
Fri May 03, 2019 6:42 am
Forum: Beginners
Topic: Home networking
Replies: 3
Views: 332

Re: Home networking

Please answer following questions: 1) How many TVs are "Smart TVs" ? 2) How many TVs are in close cable "proximity" to the switch (current wiring + future wiring) ? 3) How many TVs are in close proximity to the switch when connected wirelessly ? 4) What is the manufacturer, model name and spec sheet...
by ghans
Fri May 03, 2019 6:26 am
Forum: General programming discussion
Topic: I want to do this, what programming languages and libraries do I need to know?
Replies: 10
Views: 978

Re: I want to do this, what programming languages and libraries do I need to know?

If you do not know any programming language, Python is a good start. If you actually are fluent in any other programming language, why don't you use it on the Pi ? Chances are it works already.

ghans
by ghans
Tue Apr 30, 2019 1:56 pm
Forum: Bare metal, Assembly language
Topic: Run Raspbian on 3 cores, Arduino-ish on fourth core?
Replies: 13
Views: 1142

Re: Run Raspbian on 3 cores, Arduino-ish on fourth core?

The most advanced Raspberry/Pseudoduino project i remember is this one: https://github.com/me-no-dev/RasPiArduino BUT it does NOT run on bare metal - it runs on top of Linux ! I believe what you want is probably impossible without writing a "Raspberry Pseudoduino" "standard library" from scratch. Ho...
by ghans
Wed Apr 24, 2019 10:52 am
Forum: Raspbian
Topic: Future of the Raspberry Desktop
Replies: 13
Views: 841

Re: Future of the Raspberry Desktop

The work on the "proper" DRM/Mesa3D stack was started in 2014 - that means accelerated desktop environments were dysfunctional for quite some time and are just now starting to work out-of-the-box. Just choose "Enable/Disable experimental desktop GL driver" in raspi-config. Any accelerated desktop en...
by ghans
Fri Mar 29, 2019 8:53 am
Forum: Other
Topic: Running two different OS at the same time
Replies: 19
Views: 3278

Re: Running two different OS at the same time

QEMU+KVM should make this possible.

https://github.com/sakaki-/gentoo-on-rp ... -under-KVM

ghans
by ghans
Thu Mar 14, 2019 5:37 pm
Forum: Advanced users
Topic: Is it reliable to backup Raspi from remote?
Replies: 23
Views: 1230

Re: Is it reliable to backup Raspi from remote?

The official SD Card Copier does not use dd because of this exact issue. It uses "cp" instead. In line with this, i would suggest using rsync to backup your Pi. rsync can transfer data over network by itself and also can be used over SSH for convenience. Obviously, i can't guarantee it works if both...
by ghans
Mon Mar 11, 2019 6:21 am
Forum: Raspbian
Topic: Large partition sizes, Raspbian and Windows
Replies: 50
Views: 3130

Re: Large partition sizes, Raspbian and Windows

Buy an USB SD card reader and a second SD card. Plug both into your running Pi.
Use the SD card copier. Use gparted to increase the size of the first partition.

Now you can use the second SD card on Windows and Linux.

ghans
by ghans
Tue Feb 26, 2019 6:23 am
Forum: Beginners
Topic: Raspberry Pi ADC Sampling Rate
Replies: 6
Views: 426

Re: Raspberry Pi ADC Sampling Rate

Inserting print statements into a tight loop is a universally bad idea. It will always lead to slowdown, but of course using Python + Raspberry Pi isn't going to help.

ghans
by ghans
Tue Feb 26, 2019 6:16 am
Forum: Device Tree
Topic: How to safely exit my program before KEY_POWER shutdown?
Replies: 6
Views: 915

Re: How to safely exit my program before KEY_POWER shutdown?

You need to write a signal handler for your program. SIGTERM is the one you should take care of first.

ghans
by ghans
Mon Feb 25, 2019 1:08 pm
Forum: Graphics, sound and multimedia
Topic: Read Audio Jack Output
Replies: 3
Views: 835

Re: Read Audio Jack Output

1) Use ALSA. I think you need to configure a plugin/module called "loopback". 2) Use PulseAudio, which is built on top of ALSA. I think you want to add a "null sink" and record from it. PulseAudio is supposedly more powerful - never had to configure it by hand, so cannot confirm or deny. Configuring...
by ghans
Sun Feb 17, 2019 9:57 am
Forum: Advanced users
Topic: Which Rasp for "pro" project?
Replies: 14
Views: 1099

Re: Which Rasp for "pro" project?

You're supposed to design the motherboard yourself. The final size depends on your
skills and/or budget.

You can also order completely custom Raspberry Pis from element14. But their minimum order quantity is 3000-5000 units plus NRE costs.

ghans
by ghans
Tue Feb 12, 2019 8:05 am
Forum: General programming discussion
Topic: Controlling 100 LED's over TCP/IP between two Pi's
Replies: 8
Views: 1089

Re: Controlling 100 LED's over TCP/IP between two Pi's

pigpio already supports remote control over a network. That might be easier than writing network code yourself.

ghans

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