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by matt.b
Thu Feb 20, 2014 9:12 am
Forum: Python
Topic: Playing several MP3-Files at the same time?
Replies: 0
Views: 324

Playing several MP3-Files at the same time?

Dear all, i'm trying to write a program which can play several (let's say 4 files) MP3s at the same time. Therefore i tried to use pygame. By using pygame.mixer.Sound() i already worte program to run several WAV-Files at the same time. But i would like to use MP3s. By using pygame.mixer.music i coul...
by matt.b
Sun Nov 24, 2013 7:14 pm
Forum: Graphics, sound and multimedia
Topic: Help with building and installing snd-aloop
Replies: 1
Views: 2013

Help with building and installing snd-aloop

Dear all, i want to install snd-aloop on my Raspberry. On http://confoundedtech.blogspot.de/2012/08/building-installing-alsa-loopback.html i found a tutorial for Ubuntu. With this tutorial i tried to install it on wheezy. On Step 8 i run the config sudo ./configure --with-cards=bcm2835,loopback,hrti...
by matt.b
Fri Nov 01, 2013 4:21 pm
Forum: Other projects
Topic: [HOWTO] Decoding pager transmissions with a Pi and rtl-sdr
Replies: 57
Views: 121157

Re: [HOWTO] Decoding pager transmissions with a Pi and rtl-s

No ideas about my problem described in the last post?
by matt.b
Fri Oct 25, 2013 4:25 pm
Forum: Other projects
Topic: [HOWTO] Decoding pager transmissions with a Pi and rtl-sdr
Replies: 57
Views: 121157

Re: [HOWTO] Decoding pager transmissions with a Pi and rtl-s

Hi, i tried again to get rtl and multimon working. Finally both is running. But multimon doesn't show any decoded message... To confirm that rtl is working, i ran rtl_tcp and connected SDR# from my Windows machine. In this configuration everything works. To run rtl and multimon i'm using the followi...
by matt.b
Wed Oct 23, 2013 1:41 pm
Forum: Graphics, sound and multimedia
Topic: 2.2" Serial SPI Color TFT
Replies: 1
Views: 3768

2.2" Serial SPI Color TFT

Hi,
has somebody already tried to connect this display to the Raspberry?

http://www.ebay.de/itm/2-2-Serial-SPI-T ... 2ec8b7b394

I would like to show some data on this display.

Thanks
matt
by matt.b
Tue Oct 08, 2013 12:14 pm
Forum: Graphics, sound and multimedia
Topic: arecord creates lot of characerts instead vu-meter
Replies: 2
Views: 2297

Re: arecord creates lot of characerts instead vu-meter

Problem solved!

The command has to look like this:

Code: Select all

arecod -vv -D plughw:1,0 /dev/null
by matt.b
Fri Oct 04, 2013 6:55 am
Forum: Graphics, sound and multimedia
Topic: arecord creates lot of characerts instead vu-meter
Replies: 2
Views: 2297

arecord creates lot of characerts instead vu-meter

Dear all, a few months ago i often uses arecord to show a vu-meter of a sound input of an externen usb sound card. Yesterday i wanted to do the same by use the command: arecord -vv -D plughw:1,0 But it doesn't really show the vu-meter. Please have a look on the attached screenshot (sorry for the bad...
by matt.b
Wed Jul 17, 2013 5:18 pm
Forum: Graphics, sound and multimedia
Topic: Logilink USB 2.0 Video Grabber at Raspberry Pi
Replies: 2
Views: 2301

Re: Logilink USB 2.0 Video Grabber at Raspberry Pi

Hi,

i don't want to take a picture of the raspberrys screen. I have a camera with an analoge output (the yellow cinch connector). From that i want to take frequently pictures, maybe every 10 seconds. Therefore i need such a grabber.
by matt.b
Wed Jul 17, 2013 5:08 pm
Forum: Graphics, sound and multimedia
Topic: Logilink USB 2.0 Video Grabber at Raspberry Pi
Replies: 2
Views: 2301

Logilink USB 2.0 Video Grabber at Raspberry Pi

Dear all, has anyone tried to connect a Logilink USB 2.0 Video Grabber to the Raspberry Pi? http://www.reichelt.de/Videokarten/LOGILINK-VG0001/3//index.html?ACTION=3&GROUPID=740&ARTICLE=132720&SHOW=1&START=0&OFFSET=16& Especially to take pictures from the video input? Which software will i need to t...
by matt.b
Tue Jul 16, 2013 5:35 pm
Forum: Other projects
Topic: [HOWTO] Decoding pager transmissions with a Pi and rtl-sdr
Replies: 57
Views: 121157

Re: [HOWTO] Decoding pager transmissions with a Pi and rtl-s

Dear all,

since i have tested the same combination of Noxon DAB USB stick and antenna on my windows computer i don't think that i have to change something on the hardware side.

Has anyone already decoded some pocsag messages with this components?

Thanks
by matt.b
Fri Jul 12, 2013 6:01 pm
Forum: Troubleshooting
Topic: 3,3V short circuit?
Replies: 1
Views: 421

3,3V short circuit?

Hi, one of my Raspberry was about half a year out of use. Now i wanted to use it in a little project. When i connect the powered USB Hub the red LED shines just a little bit. Connected to another power supply i saw that the 5V supply voltage drops to around 2,3V while the current is around 1A (curre...
by matt.b
Fri Jul 12, 2013 7:17 am
Forum: Other projects
Topic: [HOWTO] Decoding pager transmissions with a Pi and rtl-sdr
Replies: 57
Views: 121157

Re: [HOWTO] Decoding pager transmissions with a Pi and rtl-s

Hi bouni, thanks. That solves my problem. I tried to decode some transmissions. To find the correct frequency i checked the spectrum with SDR# on my windows pc. Then plugged the stick on the raspberry and started the programm using the code rtl_fm -f [my frequenc] -s 22050 | multimon-ng -t raw -a PO...
by matt.b
Thu Jul 11, 2013 8:43 pm
Forum: Other projects
Topic: [HOWTO] Decoding pager transmissions with a Pi and rtl-sdr
Replies: 57
Views: 121157

Re: [HOWTO] Decoding pager transmissions with a Pi and rtl-s

Dear all, thanks for the tutorial! I tried to run my Noxon DAB USB dongle on the Pi. It is connected via one powered usb hub. But when i start the sdr server by using the command rtl_tcp -a 192.168.X.X i get the message usb_claim_interface error -6 Failed to open rtlsdr device #0. Does someone has a...
by matt.b
Fri Jul 05, 2013 8:46 am
Forum: Deutsch
Topic: Raspbian bootet nach Spannungsweg & HDMI eingesteckt nicht
Replies: 2
Views: 852

Raspbian bootet nach Spannungsweg & HDMI eingesteckt nicht

Hallo, ich habe folgendes beobachtet: Wenn ich den Raspberry herunterfahre ("sudo halt"), die Spannung wegnehme, (HDMI-Stecker bleibt dran) kurz warte, Spannung wieder dran, bootet Raspbian nicht richtig. Die Ausgabe auf dem Bildschirm endet einfach. Eingaben sind mit der Tastatur möglich. Zudem ist...
by matt.b
Wed Jul 03, 2013 4:24 pm
Forum: General discussion
Topic: Setup the pull up resistor in the shell?
Replies: 19
Views: 13796

Re: Setup the pull up resistor in the shell?

Thanks for all your help. I already know wiringPi. But i want to make a programm which doesn't need any other librarys or programms additionally. I just saw the C example how to control the pull ups on http://elinux.org/RPi_Low-level_peripherals#GPIO_Pull_Up.2FPull_Down_Register_Example. To check th...
by matt.b
Wed Jul 03, 2013 3:39 pm
Forum: Deutsch
Topic: Pull Up Widerstände in der Shell steuern?
Replies: 7
Views: 2507

Re: Pull Up Widerstände in der Shell steuern?

Um den Befehl

Code: Select all

gpio -g mode 17 up
benutzen zu können muss wiringPi installiert sein. Das will ich eigentlich vermeiden.

Trotzdem danke!
by matt.b
Wed Jul 03, 2013 2:34 pm
Forum: Deutsch
Topic: Pull Up Widerstände in der Shell steuern?
Replies: 7
Views: 2507

Re: Pull Up Widerstände in der Shell steuern?

Bei den I2C-Pins ist das so. Bei den restlichen Pins sind im Chip Pull-Up Widerstände eingebaut. Und ich würde diese gerne über die Shell steuern. Leider habe ich noch überhaupt gar nichts in der Richtung gefunden.
by matt.b
Wed Jul 03, 2013 1:17 pm
Forum: General discussion
Topic: Setup the pull up resistor in the shell?
Replies: 19
Views: 13796

Re: Setup the pull up resistor in the shell?

Thanks,

but i can't find a hint how to setup the pull up resistors!?
Here's the description how to use the pins:
http://elinux.org/RPi_Low-level_periphe ... ing_system
But i want to use the resistors additionally.

Thanks
by matt.b
Wed Jul 03, 2013 1:06 pm
Forum: General discussion
Topic: Setup the pull up resistor in the shell?
Replies: 19
Views: 13796

Setup the pull up resistor in the shell?

Hi,

is there any possibility to setup the pull pu resistor of a gpio pin using the shell? Maybe the same way like changing a pins value.

Thanks
matt
by matt.b
Wed Jul 03, 2013 1:03 pm
Forum: Deutsch
Topic: Pull Up Widerstände in der Shell steuern?
Replies: 7
Views: 2507

Re: Pull Up Widerstände in der Shell steuern?

Hallo mline,

deine Idee habe ich gerade gecheckt. Funktioniert aber leider nicht.

Gruss
matt
by matt.b
Tue Jul 02, 2013 8:27 am
Forum: Deutsch
Topic: Pull Up Widerstände in der Shell steuern?
Replies: 7
Views: 2507

Pull Up Widerstände in der Shell steuern?

Hallo,

wie man in der Shell die GPIO-Pins steuern ist mir bekannt (echo "2" > /sys/class/gpio/export, usw.).
Kann man mit so einem Befehl auch die Pull-Up-Widerstände der Eingänge steuern?
Konnte bisland noch nichts finden.

Gruss
matt
by matt.b
Mon Jul 01, 2013 8:09 am
Forum: Deutsch
Topic: Navilock NL-507ETTL GPS-Modul an UART
Replies: 2
Views: 2464

Re: Navilock NL-507ETTL GPS-Modul an UART

Hallo, @ghp: danke für deine Tipps. Ich habe just for fun ein kleines C#-Programm geschrieben, das mit die Namen aller verfügbaren seriellen Ports ausgibt. Wenn ich den USB->TTL-UART-Adapter nicht angeschlossen habe bekomme ich alle Namen aufgelistet, die ich in /dev/ finde (/dev/tty*). Schliesse ic...
by matt.b
Mon Jul 01, 2013 7:21 am
Forum: Deutsch
Topic: Hinweis auf Gewinnspiel für Raspberry Pi Shop
Replies: 2
Views: 1060

Re: Hinweis auf Gewinnspiel für Raspberry Pi Shop

Danke für den Tipp!

Gruss
matt
by matt.b
Sun Jun 30, 2013 3:02 pm
Forum: Deutsch
Topic: MP3 mit Python abspielen
Replies: 5
Views: 10358

Re: MP3 mit Python abspielen

Hallo Hiswif,

genau das ist die Lösung!
Vielen Dank

Gruss
matt
by matt.b
Sun Jun 30, 2013 1:31 pm
Forum: Deutsch
Topic: MP3 mit Python abspielen
Replies: 5
Views: 10358

Re: MP3 mit Python abspielen

Hallo, wie ich schon geschrieben habe verwende ich mpg321 für das Abspielen der Lieder. MPG321 will ich aus einem Python-Skript heraus starten. Mit der Codezeile subprocess.Popen(["mpg321", "lied1.mp3"]) funktioniert das auch ganz gut. Allerdings will ich eine Playlist damit öffnen. Deswegen habe ic...

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