OpenMarine
direct STW input and more - Printable Version

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direct STW input and more - manitu - 2016-05-17

Hi.  Thanks for the amazing work all of you, OpenPlotter is developing faster than I could imagine.
doing the SignalK/NMEA2000 bit before analog sensors makes perfectly sense , considering limitations on 0183 when naming and reading sensors.

I would love to have a standard STW sensor input! It has been done with an ardunio and I could just do that, but just dedicating a input on the analog interface would make it so much easier on the non tech-heads[/url]. [url=https://github.com/HomegrownMarine/better_speedo]https://github.com/HomegrownMarine/better_speedo

Waterproof control interfaces is hard to find at reasonable prices. Could GPIO's or analog inputs be used as mouse controls? then I could use off-the-shelf  joysticks and buttons.

Calculating polars would be great.

Does the radar plugins work with Openplotter? Anyone tried?


@Sailoog: Im planning to buy sensors for 3 pi's and I have a Q:

Do you plan to sell IMU's? if not, wich one is the recomended one (easiest to calibrate/most accurate) ?
will you get nmea0183 interfaces before you run out the nmea2000 ones ? need both.
In the webshop, what do you choose when you are from outside EU but inside europe? (Norway)
I guess I choose US to get the price without EU sales tax, but dont send my stuff to the US .

thanks again , keep up the great work!

  .manitu


RE: direct STW input and more - Sailoog - 2016-05-17

(2016-05-17, 05:55 PM)manitu Wrote: Hi.  Thanks for the amazing work all of you, OpenPlotter is developing faster than I could imagine.
doing the SignalK/NMEA2000 bit before analog sensors makes perfectly sense , considering limitations on 0183 when naming and reading sensors.

I would love to have a standard STW sensor input! It has been done with an ardunio and I could just do that, but just dedicating a input on the analog interface would make it so much easier on the non tech-heads[/url]. [url=https://github.com/HomegrownMarine/better_speedo]https://github.com/HomegrownMarine/better_speedo

Waterproof control interfaces is hard to find at reasonable prices. Could GPIO's or analog inputs be used as mouse controls? then I could use off-the-shelf  joysticks and buttons.

Calculating polars would be great.

Does the radar plugins work with Openplotter? Anyone tried?


@Sailoog: Im planning to buy sensors for 3 pi's and I have a Q:

Do you plan to sell IMU's? if not, wich one is the recomended one (easiest to calibrate/most accurate) ?
will you get nmea0183 interfaces before you run out the nmea2000 ones ? need both.
In the webshop, what do you choose when you are from outside EU but inside europe? (Norway)
I guess I choose US to get the price without EU sales tax, but dont send my stuff to the US .

thanks again , keep up the great work!

  .manitu

Hi manitu,

About STW sensors...
We are working on an OP module to simulate speedometers pulses with SOG from GPS. That means, if your speedometer gets dirty and is not working, OP converts SOG to pulses and sends them to your electronics through GPIO. Here is the info (sorry, in Spanish): http://foro.latabernadelpuerto.com/showpost.php?p=1900449&postcount=1653

But your question was not about transmitting pulses but receiving pulses and the answer is absolutely yes. We can "count" pulses from GPIO so in future versions of OP, there will be a new tab "Pulse sensors" that allow us to connect pulse sensors and measure water and fuel flow, engine rpm, anchor chain, wind... and accurate STW of course.

No feedback about radar plugins.

About the shop...
I would like to sell IMU's but I have not found a reliable provider yet. I have get the best results with the BerryIMU.
If you want I can reserve the N2K converters or whatever you want and notify you when the 0183 are here again. Let me know by PM what do you need.
Do not worry, the shop knows that some Europeans need special treatment Smile put your normal shipping address and if you are from Norway or Switzerland taxes are not applied.

Thanks to you for supporting this project.


RE: direct STW input and more - CVL - 2016-11-29

(2016-05-17, 07:50 PM)Sailoog Wrote:
(2016-05-17, 05:55 PM)manitu Wrote: I would love to have a standard STW sensor input! It has been done with an ardunio and I could just do that, but just dedicating a input on the analog interface would make it so much easier on the non tech-heads. https://github.com/HomegrownMarine/better_speedo
Hi manitu,

About STW sensors...
We are working on an OP module to simulate speedometers pulses with SOG from GPS. That means, if your speedometer gets dirty and is not working, OP converts SOG to pulses and sends them to your electronics through GPIO. Here is the info (sorry, in Spanish): http://foro.latabernadelpuerto.com/showpost.php?p=1900449&postcount=1653

But your question was not about transmitting pulses but receiving pulses and the answer is absolutely yes. We can "count" pulses from GPIO so in future versions of OP, there will be a new tab "Pulse sensors" that allow us to connect pulse sensors and measure water and fuel flow, engine rpm, anchor chain, wind... and accurate STW of course.
Hello

I managed to read out the pulses from my old VDO speedo, as the Display unit had broken down. I am reading the pulses via GPIO, and a "quick 'n dirty" python script calculates STW and passes the NMEA sentences to kplex via a FIFO. They are then shown in the cockpit by a NMEA display or wifi on a tablet. It works basically, I still have to calibrate the speed correctly, documentation how many pulses count for 1NM is difficult to find - next summer, when the boat is back in the water....
I am happy to share, if there is any interest.

Fair winds
Christian