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Old 15-07-2017, 04:30   #1
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Nmea recording device needed

I need to find or make a very simple USB Nmea 0183 recorder that simply records and saves a new file with a date and time filename, every time it is tirned on, such that the entiren mea 0183 data stream is recorded and stored.

This should be very simple to use, requiring no screen, and very reliable.

It should work with artisense or any other nmea 0183 device with a Usb port.

The skipper will then record in the log book any ideal periods for polars, noting any slight currents, sea conditions, sails used and general AWA and AWS wind ranges.

The information in the log book will be extracted to make the polars for the boat.
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Old 15-07-2017, 04:35   #2
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Re: Nmea recording device needed

A Raspberry Pi running openplotter could do that, a little piece of node red code could save it all into one file or split different types of sentences into different files. I think you need a monitor to set up initially then it can all be done over wifi, either save to a drop box or transfer the files over wifi with something like filezilla. Pi3 has wifi built in.
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Old 15-07-2017, 04:46   #3
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Re: Nmea recording device needed

Conachair, of course using Opencpn or Navmonpc or some other program would work, but I want to make it really simple so that the program and nmea 0183 recording starts whenever the power to it is turned on or whenever a certain switch is switched on (until it is turned off and the file closed with datetime name) so no screen or software fiddling is required!
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Old 15-07-2017, 04:49   #4
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Re: Nmea recording device needed

It would be easiest to have the data saved to a usb stick that can be removed and transferred for polar analysis.
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Old 15-07-2017, 04:51   #5
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Re: Nmea recording device needed

This device could be used to record a race or cruise, or just daysails for optimal polar data collection, without wasting time getting the program setup.
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Old 15-07-2017, 04:52   #6
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Re: Nmea recording device needed

Yep, a pi will do that for you, short piece of node red will start recording every time it gets turned on, save a file with date/time name and parse out the data into csv if you want. I have most of the node red code already, wouldn't take long to stick something together.
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Old 15-07-2017, 04:52   #7
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Re: Nmea recording device needed

The skipper of this boat will want it to be very easy to do.
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Old 15-07-2017, 05:08   #8
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Re: Nmea recording device needed

Awesome. Can you help me? I would need rpi-3 for about $40 a box and power source off the 12vdc. What else?

I might make one for myself, but would want a small screen I think to setup and debug it before putting it on Summer Wind.
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Old 15-07-2017, 05:12   #9
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Re: Nmea recording device needed

I had been hoping it could simply be a usb key recording device with a turn on-off button and no other wires, but there are advantages/possibolities to having full opencpn running particularly if a wifi access point can be made for access to the data from a tablet/iphone.
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Old 15-07-2017, 05:50   #10
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Re: Nmea recording device needed

Have a look at this

http://www.yachtd.com/products/recorder.html
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Old 15-07-2017, 06:11   #11
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Re: Nmea recording device needed

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Originally Posted by hoppy View Post
It is an NMEA2000 device and not compatible with USB nor NMEA0183. It would require a $90 converter from Raymarine and some other bits and pieces. Even then it would probably be a bit fiddly to get it working.
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Old 15-07-2017, 06:21   #12
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Re: Nmea recording device needed

This could be done with an Arduino and attached SD-Card breakout board and real-time-clock. This can done in a smaller and cheaper package than the Raspberry PI (although not much cheaper). The Arduino can be powered by a 5VDC supply and there are numerous programming examples out there written in c++.
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Old 15-07-2017, 07:51   #13
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Re: Nmea recording device needed

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It is an NMEA2000 device and not compatible with USB nor NMEA0183. It would require a $90 converter from Raymarine and some other bits and pieces. Even then it would probably be a bit fiddly to get it working.
Whilst it's not exactly what the OP asks for, neither are the RasberryPi, Arduino or OpenCPn solutions
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Old 15-07-2017, 08:22   #14
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Re: Nmea recording device needed

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Originally Posted by hoppy View Post
Whilst it's not exactly what the OP asks for, neither are the RasberryPi, Arduino or OpenCPn solutions
The Pi can actually do exactly what the brief was, just needs a little bit of cut and paste with and tiny bit of editing to set up the port.
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Old 15-07-2017, 08:36   #15
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Re: Nmea recording device needed

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Originally Posted by rgleason View Post
Awesome. Can you help me? I would need rpi-3 for about $40 a box and power source off the 12vdc. What else?

I might make one for myself, but would want a small screen I think to setup and debug it before putting it on Summer Wind.
Love to help, node red doesn't seem to be known about much in many circles, for NMEA/opencpn etc fault finding it's wonderful so as well as posting how to set up a recorder it might be useful to others who don't mind digging a bit deeper than the on switch to have a taster of node red.

If the nmea 0183 device outputs to usb then a Pi3, case & power supply should do it probably, maybe a wifi dongle so you don't get locked out over wifi if you do something wrong with the access point. The Pi can be useful as a wifi repeater as well. A lot of the time I never use the Pi monitor but just VNC in through a laptop.

The last raspbian update seemed to break node red so i need to back track a bit, I'll make some notes/screen shots & post in here.
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