Go to advanced search

by TideMan
Wed Sep 27, 2017 3:01 am
Forum: Networking and servers
Topic: Trying to understand networking and its capabilities
Replies: 8
Views: 953

Re: Trying to understand networking and its capabilities

Connect a separate HDMI cable from each RPi to separate ports on the smart TV, then use the TV's remote to switch between them. My Samsung smart TV then allows its remote to control each device. It does this using a facility called "anynet".
by TideMan
Thu Sep 21, 2017 11:32 pm
Forum: Beginners
Topic: Cmd to See Raspberry OS Version
Replies: 9
Views: 840

Re: Cmd to See Raspberry OS Version

The trouble with burning a new SD is that you then have to go through and re-install all the programs that were running fine before. Oftentimes, you don't remember until something doesn't work. Then you realise it's because xyz needs to be re-installed (or even built from the tar ball). What a PITA!!
by TideMan
Fri Sep 08, 2017 3:41 am
Forum: Automation, sensing and robotics
Topic: Controlling RPi 3 from (really) far
Replies: 4
Views: 575

Re: Controlling RPi 3 from (really) far

DougieLawson wrote:
Thu Sep 07, 2017 9:59 pm
RealVNC is simple.
Are you implying, Dougie, that one can use RealVNC to connect to a remote machine via the Internet? Without using weaved or similar? If so, how?
by TideMan
Thu Sep 07, 2017 4:52 am
Forum: Advanced users
Topic: Raspberry Pi 2 B+ Internet Surfing Extremely Slow
Replies: 3
Views: 655

Re: Raspberry Pi 2 B+ Internet Surfing Extremely Slow

Chromium, IceWeasel, Firefox, Epiphany. They're all hopelessly slow in my experience.
But text-based Lynx works OK, so it's probably a graphics issue.
by TideMan
Fri Aug 04, 2017 2:10 am
Forum: Automation, sensing and robotics
Topic: Connect rpi to matlab via wifi
Replies: 5
Views: 1297

Re: Connect rpi to matlab via wifi

Well, I bought a copy of Matlab for Windows on a PC because I use it for work, but on my RPis I use Octave, which is free.
Almost all Matlab scripts transfer seamlessly to Octave.
by TideMan
Mon Jun 12, 2017 10:03 am
Forum: Other programming languages
Topic: Why no PHP forum?
Replies: 20
Views: 2740

Re: Why no PHP forum?

Nor a Fortran forum, yet Fortran runs like a scalded cat on RPis, even an old 512 MB Model B.
by TideMan
Fri Jun 02, 2017 11:28 pm
Forum: Networking and servers
Topic: Wifi connection between Win 10 and Raspberry Pi3 [Solved]
Replies: 15
Views: 1157

Re: Wifi connection between Windows 10 and Raspberry Pi3

I use WinSCP running on my Win 10 machine for this.
It is a very elegant program.
And you can set it up on a schedule to sync automatically, either going from RPi to Win 10, or Win 10 to RPi, or both ways.
by TideMan
Fri Jun 02, 2017 11:14 pm
Forum: Beginners
Topic: KODI? OpenElec? Raspbian? etc. etc.
Replies: 3
Views: 2213

Re: KODI? OpenElec? Raspbian? etc. etc.

I endorse dom's post above. At home, I have OpenELEC running standalone on an RPi3 in the family room next to the TV. We use kodi more than broadcast TV these days. At our beach cottage, I have kodi running from Raspbian on an RPi3 that also runs a weather station (CumulusMX software) that posts a l...
by TideMan
Fri Apr 28, 2017 4:44 am
Forum: Python
Topic: How many versions do I need? !!!
Replies: 28
Views: 2567

Re: How many versions do I need? !!!

Whereas Fortran IV code from the 1960s will work fine with the latest gfortran compiler.
by TideMan
Thu Apr 27, 2017 9:54 am
Forum: Advanced users
Topic: Loading Pi3 data into matlab
Replies: 5
Views: 617

Re: Loading Pi3 data into matlab

AFAIK, you can simply save a .mat file on Linux, then load it on a PC:
save(matfile,'x','y') % in Matlab on RPi
then
xy=load(matfile); % in Matlab on PC
by TideMan
Sun Apr 23, 2017 11:11 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI driver for LTC2315 for FFT analysis
Replies: 4
Views: 710

Re: SPI driver for LTC2315 for FFT analysis

If you want fast processing on the RPi, I'd use Fortran for FFT in preference to either Python or Simulink. It's hard to beat compiled Fortran code for straightforward number crunching.
by TideMan
Wed Apr 12, 2017 8:21 pm
Forum: Graphics, sound and multimedia
Topic: Detect a specific Frequency from microphone input signal
Replies: 6
Views: 1304

Re: Detect a specific Frequency from microphone input signal

The trouble with using FFT for this is that your signal is non-stationary, i.e., it is transient. A stationary signal can be defined as having constant variance, no matter what window is chosen. Stationarity is a prerequisite for FFT. A better method is orthogonal wavelet decomposition which uses a ...
by TideMan
Sat Apr 08, 2017 9:22 pm
Forum: Beginners
Topic: Best method for transferring files from computer to RPi?
Replies: 7
Views: 2797

Re: Best method for transferring files from computer to RPi?

And I use WinSCP. It has a very nice GUI. All my RPis are stored there along with their userid/passwords and it just takes a click to connect. I believe it uses SSH.
by TideMan
Wed Mar 29, 2017 3:24 am
Forum: Automation, sensing and robotics
Topic: Upload data to external website
Replies: 4
Views: 730

Re: Upload data to external website

Run gnuplot on the RPi to produce a .png file, then ftp to the web server.
by TideMan
Sun Mar 26, 2017 9:56 pm
Forum: Python
Topic: Script Will Not Run Under CRON
Replies: 28
Views: 1782

Re: Script Will Not Run Under CRON

DirkS wrote:Try using the full path to the python executable.
I agree.
Just about every time I have a problem with cron, it comes down to this.
by TideMan
Wed Mar 22, 2017 10:55 pm
Forum: Beginners
Topic: Raspbian + Retropie + Kodi
Replies: 11
Views: 2341

Re: Raspbian + Retropie + Kodi

I'm not familiar with RetroPie, but in Kodi there is a usually is an Exit option in the power menu in the lower left corner of the home screen. But does it work? In mine, I have to reboot to get out of Kodi. This is the OP's problem. He's set it up so that after booting, Kodi is loaded automaticall...
by TideMan
Wed Mar 08, 2017 8:33 pm
Forum: Media centres
Topic: Kodi SD card Backup
Replies: 8
Views: 2186

Re: Kodi SD card Backup

Depending on which version of Raspbian you're using, you can simply go into Accessories/SD Card Copier and do it there.
I don't know if that's available in NOOB.
by TideMan
Tue Mar 07, 2017 7:33 pm
Forum: Troubleshooting
Topic: Kodi on preloaded micro SD card
Replies: 27
Views: 3985

Re: Kodi on preloaded micro SD card

Just to clarify what Fruit of the Loom is telling you: There are two ways to run Kodi on an RPi: 1. As a standalone system which has a cut-down version of the OS. You can only access the system using SSH and you can only use the RPi for Kodi. 2. As an add-on to the Jessie OS which you install using ...
by TideMan
Tue Feb 28, 2017 3:56 am
Forum: Off topic discussion
Topic: Impossibilities.
Replies: 23
Views: 2678

Re: Impossibilities.

Gavinmc42 wrote: First time Everest was climbed, did Hillary say "that was easy, why has it not been done before?".
What he said (to his friend George Lowe) was:
"Well, George, we knocked the bastard off".
by TideMan
Wed Feb 15, 2017 9:26 pm
Forum: General discussion
Topic: Cloning a SD Card
Replies: 17
Views: 3917

Re: Cloning a SD Card

With pixel, you can use Accessories/SD Card Copier for this.
by TideMan
Wed Feb 15, 2017 9:10 pm
Forum: General discussion
Topic: Looking for a small(ish) monitor for my Pi.
Replies: 8
Views: 1398

Re: Looking for a small(ish) monitor for my Pi.

There's Nexdock:
http://nexdock.com/our-story/
which is US$119.
I got one by entering the crowd funding project. It is a very elegant little unit.
But I see the next batch is not due until mid-2017.
by TideMan
Thu Dec 29, 2016 3:30 am
Forum: Graphics programming
Topic: choosing the graphics package
Replies: 6
Views: 1730

Re: choosing the graphics package

I like gnuplot, but there's a learning curve.....
Another option is Octave, but there's a learning curve.......
Another option is matplotlib in Python, but there's a learning curve.....

Get the picture?
by TideMan
Tue Dec 20, 2016 7:04 pm
Forum: General discussion
Topic: Standalone Kodi on RPi3: wifi issues
Replies: 4
Views: 1072

Re: Standalone Kodi on RPi3: wifi issues

liz wrote:If you've got a metal case or a case with a metal support or screw next to the WiFi adaptor (or an add-on board with a spacer or screw there), that could be the culprit. Have you tried it without the case?
No, it's in an "official" RPi 3 case (white and pink plastic)
by TideMan
Tue Dec 20, 2016 2:39 am
Forum: General discussion
Topic: Standalone Kodi on RPi3: wifi issues
Replies: 4
Views: 1072

Standalone Kodi on RPi3: wifi issues

I was running standalone Kodi on an RPi3 and having cutting out problems. Plugging in ethernet instead of using wireless solved the problem, so I concluded it must be the on board wifi adapter. So I plugged in a usb WLAN Adapter with aerial and suddenly everything worked without any cutting out! Can...
by TideMan
Thu Dec 15, 2016 7:44 pm
Forum: Off topic discussion
Topic: i is tired.
Replies: 76
Views: 10502

Re: i is tired.

i is sqrt(-1) in Matlab by default (so is j).
Using them for indexing is unwise if you're later going to do something like exp(i*x).

Go to advanced search