• Announcements

    • Zapata

      Abbreviated rules   07/28/2017

      Underdawg did an excellent job of explaining the rules.  Here's the simplified version: Don't insinuate Pedo.  Warning and or timeout for a first offense.  PermaFlick for any subsequent offenses Don't out members.  See above for penalties.  Caveat:  if you have ever used your own real name or personal information here on the forums since, like, ever - it doesn't count and you are fair game. If you see spam posts, report it to the mods.  We do not hang out in every thread 24/7 If you see any of the above, report it to the mods by hitting the Report button in the offending post.   We do not take action for foul language, off-subject content, or abusive behavior unless it escalates to persistent stalking.  There may be times that we might warn someone or flick someone for something particularly egregious.  There is no standard, we will know it when we see it.  If you continually report things that do not fall into rules #1 or 2 above, you may very well get a timeout yourself for annoying the Mods with repeated whining.  Use your best judgement. Warnings, timeouts, suspensions and flicks are arbitrary and capricious.  Deal with it.  Welcome to anarchy.   If you are a newbie, there are unwritten rules to adhere to.  They will be explained to you soon enough.  

smartcomsoftware

Members
  • Content count

    42
  • Joined

  • Last visited

About smartcomsoftware

  • Rank
    Member
  • Birthday 12/12/1958

Contact Methods

  • Website URL
    http://www.smartcomsoftware.com
  • ICQ
    0

Profile Information

  • Location
    Nether Wallop, England

Recent Profile Visitors

1,063 profile views
  1. NMEA to Wi-Fi

    Just a nudge for those who are interested in our NMEA0183 to Wi-Fi device: Our Kickstarter campaign is ending on Wednesday 5th July at 15:45 UK time / 07:45 PDT / 10:45 EDT. Go to www.nmeatools.com or https://www.kickstarter.com/…/nmeawifi/nmea0183-wi-fi-device for more information and to get one for your boat.
  2. NMEA over Wi-Fi device coming up on Kickstarter

    Just to let people know that the project is going live on Kickstarter tomorrow (the 31st) at 0800PDT / 1100 EDT. There will be a limited number available for just £50/$65 each. As soon as it goes live there will be a link to the Kickstarter page from www.nmeatools.com Tim
  3. NMEA over Wi-Fi device coming up on Kickstarter

    Yes, we're working on that.Hardware is sorted and we're working towards NMEA type approval, though the inconsistencies in the "standard" and discrepancies between it and NMEA's approval test device is making the software harder work than it should be. Before we started, I though this would be an ideal case for test driven development, but if the tests are wrong then that isn't the case! The device will be quite configurable, so for most users it will work fine out of the box but there will be the ability to decide which N2K and 0183 sentences are processed and what they map to, and also the sample rate output to NMEA0183 to manage the low bandwidth. To ensure robustness and compatibility we decided to pay for the N2K docs. Their licence means you have to put the device up for their certification process, and you can't open source the code. However we're thinking about how we can use our learning curve to offer a service to other small developers in implementing N2K, within the licence constraints of NMEA. The aim is to have a t least a pre-production device ready for METS in November.
  4. NMEA over Wi-Fi device coming up on Kickstarter

    Moonduster, I agree - RS422 never has had a signal and a ground. I never said it did. For new devices the NMEA standard requires RS422 voltage levels, but if you look at section 3.5.3 of the spec it says: "For reasons of compatibility with equipment designed to earlier versions of this standard, it is noted that the "idle, marking, logical "1", OFF or stop bit state" had previously been defined to be in the range -15 to + 0.5 Volts. The "active, spacing, logical "0", ON or start bit state" was defined to be in the range +4.0 to +15 Volts while sourcing not less than 15 mA." RS422 is +/-6V We don't all have the privilege of being able to have the newest instruments.
  5. NMEA over Wi-Fi device coming up on Kickstarter

    Agreed. And there are quite a lot of high end devices that act as a router, do NMEA0183 muliplexing, NME0183/N2K conversion etc that suit some installations but you pay for what you get. We saw a need for a good quality simple, low cost device. Having worked on marine computing systems since we were putting Apple II's on race boats, and had an early Transit system that filled a berth and gave 3 or 4 fixes a day, I personally would rather stick to good old fashioned wire for primary connections of instruments, but then I'm from the school where a short offshore race set off on Friday afternoon and finished on Sunday afternoon, and if I wanted a short day race I'd go dinghy racing. If you are just having a sprint in a big boat, losing your instruments is less critical for safety, even if it does mess up your race results.
  6. NMEA over Wi-Fi device coming up on Kickstarter

    Many thanks
  7. NMEA over Wi-Fi device coming up on Kickstarter

    I haven't used the Vesper AIS, but I've looked at the info on the Vesper website for the WatchMate XB-8000. Obviously the Vesper has a lot of stuff that we don't, but just comparing the common areas of NMEA0183 and Wi-Fi the differences seem to be: - The Vesper only seems to support a specific number of NMEA0183 sentences for input and output, whereas we just chuck everything through - We support a couple more data rates for NMEA, e.g. some non-marine GPS devices use 9600bps which we support - The Vesper Wi-Fi is just TCP, and I'm not sure if the port number can be changed. We support simultaneous TCP and UDP, and everything is configurable. This is handy as some apps just support UDP, whereas others just support TCP. Please correct me if any of the above is wrong!
  8. NMEA over Wi-Fi device coming up on Kickstarter

    Shipmodule with Wi-Fi starts at €359 (about US$400) Our device outside of Kickstarter will be £99 (about $125), with the initial ones going for half that in Kickstarter. Yes, the Shipmodul does more, but it costs significantly more, and not everybody needs that.
  9. NMEA over Wi-Fi device coming up on Kickstarter

    NMEA0183 is close to, but not the same as RS422. The main differences are that the voltage ranges are different (with NMEA allowing a greater range than RS422), and NMEA also allows for single data wires (like Garmin kit) whereas RS422 always requires a signal and ground. Because NMEA allows single data wires, and also because in implementation quite a lot of 2 wire NMEA connections use ground for B, you can get ground loops and interference problems that you would not generally get with RS422. Also, quite often NMEA wiring is not shielded twisted pair, which again makes it more prone to interference.
  10. NMEA over Wi-Fi device coming up on Kickstarter

    It may do, but the main thing to note is that it is RS232, whereas NMEA is closer to (but not the same as) RS422. Also, there is no mention of it being opto-isolated - this will help eliminate any interference problems, as well as eliminating any ground loops (for these reasons it is required on the receive side in the NMEA spec). If you give it a go, put in an inline fuse as there s no mention of any internal fusing either. Tim
  11. People may be interested in a project coming up on Kickstarter for a new NMEA0183 to Wi-Fi gateway device. Have a look at www.nmeatools.com for more information.