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by topguy
Sat Apr 20, 2019 2:03 pm
Forum: Python
Topic: Triggering a PiCamera with an RFID reader
Replies: 1
Views: 41

Re: Triggering a PiCamera with an RFID reader

You should probably learn to use the "picamera" python module to start and stop recording like you want. I suggest you make a seperate test program for that to see if you are able to start recording, do something else and then stop the recording when you feel like it. Then you need to learn about "i...
by topguy
Sat Apr 20, 2019 1:57 pm
Forum: General discussion
Topic: C code not executing in the Pi using Xenomai
Replies: 1
Views: 78

Re: C code not executing in the Pi using Xenomai

Not sure its the correct way but you could try to run it with "sudo" to see if its trying to access priveliged functions/devices.
by topguy
Sat Apr 20, 2019 1:54 pm
Forum: Python
Topic: NFC trouble to reading
Replies: 1
Views: 23

Re: NFC trouble to reading

It will probably be helpful if you tell us what you think your program is supposed to do. Or if you have copied from somewhere. OSError: [Error 2] No such file or directory I'm guessing that this error refer to the file "/usr/bin/nfc-poll" If you can run "nfc-poll" from the commandline successfully ...
by topguy
Wed Apr 17, 2019 9:51 pm
Forum: Troubleshooting
Topic: Reading data from GNURadio and GPS module with the raspberry
Replies: 1
Views: 33

Re: Reading data from GNURadio and GPS module with the raspberry

If you can be specific about which physical interfaces the modules ( radio and GPS ) have then I guess it will be easier to answer those questions.
Links to datasheets are particularely helpful.
by topguy
Wed Apr 17, 2019 2:04 pm
Forum: Python
Topic: How to save GPS Data to a text file?
Replies: 11
Views: 170

Re: How to save GPS Data to a text file?

Actually, I wants to save every gps (latitude and longitude) First you need to parse the raw GPS data into longitude and latitude values. There are some NMEA parsing libraries you can use for that.( maybe even some examples from adafruit how to use them too ) I wants to save it to .txt file which I...
by topguy
Wed Apr 17, 2019 9:25 am
Forum: Python
Topic: How to save GPS Data to a text file?
Replies: 11
Views: 170

Re: How to save GPS Data to a text file?

Do you have a GPS ? Do you know how it connects to the Pi ?
What is the purpose of the text file ? Who or what should read the file later ? Should it contain raw GPS data or only serve as a log of positions ?
How well do you know Python ?
by topguy
Tue Apr 16, 2019 4:06 pm
Forum: C/C++
Topic: Document hunt for Bluetooth C++ API
Replies: 1
Views: 72

Re: Document hunt for Bluetooth C++ API

Why is there so little programmer documentation for Bluetooth BR/EDR—which was released more than a decade ago? Becasue most people just use Bluez to set up (pair) the BT communication between the PC and the device. And then you dont care anymore about bluetooth. You now either have a new sound dev...
by topguy
Mon Apr 15, 2019 11:09 am
Forum: General discussion
Topic: How much power Supply is generated at USB port in Raspberry pi 3b+?
Replies: 4
Views: 142

Re: How much power Supply is generated at USB port in Raspberry pi 3b+?

The speakerphone probable should be working, but speaker elements should not be connected to the Pi without an amplifier, and 2.5W is probably not what that speaker is meant for.
by topguy
Mon Apr 15, 2019 10:21 am
Forum: Networking and servers
Topic: Server for live video streaming
Replies: 3
Views: 111

Re: Server for live video streaming

May I know what server does the Raspberry Pi used for live video streaming ? Do you mean what server you would be running on the Pi or what kind of server would you be streaming to ? If the video server would be running on the Pi, every connection would have to share the 4G network link. You can pr...
by topguy
Sun Apr 14, 2019 12:07 am
Forum: Automation, sensing and robotics
Topic: show the same video on 2 different display
Replies: 2
Views: 81

Re: show the same video on 2 different display

What connection is Wifi not Ethernet ?

I would normally suggest a HDMI splitter.
by topguy
Fri Apr 12, 2019 2:32 pm
Forum: Off topic discussion
Topic: I know this sounds like something from a Spy novel or makes me sound a like a crazy person but...
Replies: 26
Views: 613

Re: I know this sounds like something from a Spy novel or makes me sound a like a crazy person but...

A remote management tool is by definition a backdoor, a very useful backdoor when your server on the other side of the globe ( or disc if you are a flatearther :lol: ) is acting up. But if we continue this discussion with the assumption that none of these features are designed with the intent of bei...
by topguy
Fri Apr 12, 2019 2:15 pm
Forum: C/C++
Topic: Missing sharing libraries
Replies: 3
Views: 126

Re: Missing sharing libraries

It is relevant if this application was built with the standard Qt installation on Pi or not. ...but you can try this: export LD_LIBRARY_PATH=/opt/vc/lib You do this in the shell before trying to start the Qt application. You should also check if the file exists in the "/opt/vc/lib" directory. You mi...
by topguy
Fri Apr 12, 2019 1:39 pm
Forum: Gaming
Topic: Liberal Crime Squad: XML parsing problem
Replies: 2
Views: 94

Re: Liberal Crime Squad: XML parsing problem

I think only one that understand how the XML files is used to produce the text on the screen can really understand what is failing. - Maybe looking at the differences in the "configure" logs on the desktop build and the raspberry build of the same version can give some hints. - Maybe the build error...
by topguy
Fri Apr 12, 2019 12:08 pm
Forum: General discussion
Topic: Image SD but not working
Replies: 6
Views: 182

Re: Image SD but not working

Please provide link to any guide you might be following or else its impossible for us to understand what you are talking about and what you have done.
We are nerds, not psychics.
the problems referes to the SD and the write image process.
Describing those problems is also a good idea.
by topguy
Fri Apr 12, 2019 12:04 pm
Forum: Troubleshooting
Topic: PATH OK (I think) but ldconfig missing?
Replies: 2
Views: 69

Re: PATH OK (I think) but ldconfig missing?

Its very helpful if you show us what command you tried before you got the error. [email protected]:/etc/init$ which ldconfig /sbin/ldconfig [email protected]:/etc/init$ dpkg -S ldconfig manpages: /usr/share/man/man8/ldconfig.8.gz libc-bin: /sbin/ldconfig.real libc-bin: /sbin/ldconfig This is a direct link to the libc...
by topguy
Thu Apr 11, 2019 11:16 am
Forum: Beginners
Topic: Installation steps for clang on Rpi3 for std::thread with c++11 program
Replies: 1
Views: 90

Re: Installation steps for clang on Rpi3 for std::thread with c++11 program

Those entries for apt that fails belongs to even older version of Raspbian, Wheezy.. so they can be safely removed from your "/etc/apt/sources.list". I dont think they prevent normal updates.. and I still will suggest that you start from scratch with a Raspbian Stretch image. Any up-to-date guide yo...
by topguy
Wed Apr 10, 2019 4:27 pm
Forum: C/C++
Topic: std::thread not working with clang in rpi3
Replies: 3
Views: 156

Re: std::thread not working with clang in rpi3

Since its CLang 3.5 it matches my Raspbian Jessie installation. Raspbian stretch should have CLang 3.8 and 4.0 so maybe an upgrade to the newest Raspbian version helps.. ( I dont have a way to test that, but someone else might have. )
by topguy
Wed Apr 10, 2019 2:28 pm
Forum: General discussion
Topic: MiniDLNA and the USBs
Replies: 9
Views: 193

Re: MiniDLNA and the USBs

but when I am going to use a USB...
Maybe tell us "how" you use the USB...
by topguy
Wed Apr 10, 2019 2:25 pm
Forum: Beginners
Topic: [Solved] How to turn off Raspberry with a keyboard ?
Replies: 9
Views: 391

Re: How to turn off Raspberry with a keyboard ?

It looks like "Fn+Enter" gives you a CTRL+ALT-DEL which under normal setup should reboot the pi. [email protected]:/etc/init$ ls -l /lib/systemd/system/ctrl-alt-del.target lrwxrwxrwx 1 root root 13 Jan 23 12:59 /lib/systemd/system/ctrl-alt-del.target -> reboot.target Under systemd this behaviour is controlle...
by topguy
Wed Apr 10, 2019 2:14 pm
Forum: General discussion
Topic: Universal TV and AC IR Remote Library
Replies: 5
Views: 106

Re: Universal TV and AC IR Remote Library

Where can we get more info about "MI" tvs ? Its not unheard of that many companies uses overlapping codes, maybe MI buy their electronics from Samsung so they use the same codes. You can enter your TV model and the word "lirc" in google and hope you get lucky. Also you can attach a an Ir receiver an...
by topguy
Wed Apr 10, 2019 1:49 pm
Forum: General discussion
Topic: Universal TV and AC IR Remote Library
Replies: 5
Views: 106

Re: Universal TV and AC IR Remote Library

Raspberry Pi has Linux, Linux has LIRC.

http://www.lirc.org/
http://lirc.org/html/irsend.html
by topguy
Wed Apr 10, 2019 1:47 pm
Forum: Camera board
Topic: Pi Camera as Webcam
Replies: 3
Views: 153

Re: Pi Camera as Webcam

Just to clarify, the Chromium we are talking about is running on the Pi ? use Chromium to web chat online sites it doesn't even pick up the camera. The minimum you would need to do is to enable the V4L2 API for the camera. You do that by loading a particular kernel module. This post was a recent exa...
by topguy
Wed Apr 10, 2019 1:43 pm
Forum: Troubleshooting
Topic: Unable to open video device!!!
Replies: 13
Views: 277

Re: Unable to open video device!!!

You would need to explain more about what you mean by "recording slow".
by topguy
Mon Apr 08, 2019 11:49 am
Forum: Troubleshooting
Topic: New Raspberry PI 3b+ setup HDMI video is not working, never has.
Replies: 11
Views: 391

Re: New Raspberry PI 3b+ setup HDMI video is not working, never has.

Suggestions?
Forget about NOOBS and burn a Raspbian image directly on the card using the program on etcher.io.
That should give easier access to config.txt for the OS you are booting.

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