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  I want to use the RTL2821U DVB Stick for TV/ Radio
Posted by: Alpenskipper - 05-04-2016, 11:24 AM - Forum: How do I...? - Replies (3)


How can I use the (unmodified) DVB stick for watching TV?

I installed Kodi - runnig fine with media files
I installed TVHeadEnd - running, I can access the Web configuration site

But the DVB stick does not show up in TvHeadEnd.

In Openplotter, I can see the waterfall runnig, so I guess the stick is recognized by raspbian.

Is it possible, that Openplotter "occipies" the stick?
The driver for RTL2832U is integrated in the Openplotter image?

Thanks for help,


  edit NMEA setting
Posted by: SkipperEarly - 05-04-2016, 11:06 AM - Forum: Feature Requests - No Replies

If I wish to change e.g. the IP setting in the NMEA connections it is  currently required to delete a connection and then add it again with the new address. 
Would be nice if a double click on a selected connection opens the entry form with the current values already filled and ready for correction.


  [SOLVED] Openplotter window cut off on Raspidisplay 7''
Posted by: Alpenskipper - 05-04-2016, 01:27 AM - Forum: Bug Reports - Replies (3)

Due to the low resolution (800x480) of the original 7' Raspberry display, the openplotter window is cut off.


  signalK 1.0.0 to be release
Posted by: davidec - 05-03-2016, 10:36 AM - Forum: General discussion - Replies (1)

Hi all,
the new SignalK major release will be released on few weeks.
There are any plan to import this version the near future?

From signalK ML:

Quote:"We are at a very important milestone in the Signal K development....the release of Version 1.0.0.
The intent is to update and freeze the Spec,  website, demo servers, docs and anything else we can think of at Version 1.0.0 so that developers, hardware manufacturers and end users have a clear, stable and well documented Signal K version 1.0.0 to use this season.
If anyone has any questions or concerns about this proposed release strategy, please speak up, as our goal is to finalise everything this week so that V1.0.0 is released before the middle of May.

Posted by: SkipperEarly - 05-02-2016, 05:56 AM - Forum: Bug Reports - Replies (2)

        Have just updated/cloned newest version of OP 0.8.beta
Work with tightVNC and therefore have sometimes response delays on screen.

1. There is a strange text (le33?) on the Humidity header line
2. when I configure subplots the opening windows has tk#2 etc in the header and having impatiently pressed the several times the configure subplot button many tk#nnn windows are opened. 
3. cannot save the new subplot setting, so next time I open Temp/Pres/Hum-graph std defaults are used again.

Its all not a big deal just wanted to bring it to the attention of the developer.


  My Openplotter installation Blog
Posted by: Alpenskipper - 05-01-2016, 11:41 PM - Forum: How I did it - Replies (22)


In the following I will post the evolution of my Openplotter installation on board.

Yesterday I started with a new mahagoni board for the navigation corner. With a cnc router I cut the hole for the 7" screen.

[Image: 26670447152_40f6d852a1_b.jpg]Alle Fotos-890 von -sirius_310ds-

[Image: 26160357033_27faafe1ff_b.jpg]Alle Fotos-891 von -sirius_310ds-

[Image: 26738681796_5e3b1547e5_b.jpg]Alle Fotos-892 von -sirius_310ds-

[Image: 26158296964_3e51230115_t.jpg]Alle Fotos-889 von -sirius_310ds-

  "SOLVED" BT gps antenna AMTEC
Posted by: cepicscepics - 04-30-2016, 12:03 PM - Forum: How do I...? - Replies (19)

I all,
this is my first time on this forum..
I've installed a gps BT antenna AMTEC on a RPI3 with BLUEZ on openPlotter 0.7.1, but no gps data in OpenCpn

some idea??

best regards

Attached Files Thumbnail(s)

  Switching off devices when voltage drops
Posted by: SkipperEarly - 04-29-2016, 02:41 PM - Forum: How do I...? - Replies (7)

There was discussion in another thread that it is important to have reliable power supply for OP to work without surprises.
I made the same experience! - its the first thing I check once something isn't behaving as expected Smile

This leads me to the question/idea if I could switch off selectively e.g 2nd USB WIfi, or AIS dongle when voltages drops.
eG I leave the vessel unattended, so I may only need some sensors/switches working, not the whole SingnalK stuff.
Having this nice trigger/switch settings in OP I was thinking about set there a priority of switching off suppliers - get informed by SMS and so on.  

Any ideas if this can be done?

  Twin wifi dongles - thought it was an AP issue, but appears to be power...
Posted by: Myles7 - 04-29-2016, 08:24 AM - Forum: General discussion - Replies (2)

I was about to document issues I've been having since trying to add a second wifi dongle to my fledgling system...

I've been having serious AP stability issues - despite having both units plugged in to a powered hub.

As a last resort, I removed the gps and DVB-t dongles - and Lo! the wireless dongles both started performing properly and the AP came up just fine Smile

So, despite having a supposedly-powered hub, it's clearly not up to the job. It was one of the PiHut ones - I'll try another to see if I can narrow the issue down.

Anyway, glad to say that OP seems to be working well!

  User defined (in OP tabs) COEFFICIENT for calibration of analog inputs
Posted by: Didier B - 04-29-2016, 05:07 AM - Forum: Feature Requests - Replies (3)

Hi Sailoog and team !
What about associating to each analog input a user defined (in OP tabs) coefficient to calibrate the measuring chain (errors due to either the sensor or distortions due to the hardware linking the sensor to the RPi).
 -For 1W sensors, the reading of my 2 BMP180 have more than one degree difference. I know an error of 2°C is meaningless in the coolant temperature, but it is quite significant in sea temp. when going for a swim ...
- Same for I2C sensors (pressure, temperature, humidity)
 -For SPI interface, as the input value range of MPC3008 is 0 to 3.3 (or 3.2 ?) V, for a battery voltage supervision (10- 14 V) a divider bridge is required, bringing in more distortion to the reading. To monitor a battery current via a shunt (30 to 50 mV) an amplifier will be needed whose gain will depend on the precision of  a couple of resistors ... Of course for an MPC3008 8 coefficients would be reqired.

Of course the HW used to connect a sensor to an input has to adapt the sensor range to the input range, but a SW coefficient would make the calibration process a breeze. Smile