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Wegmatt dAISy Owner's Manual

Ais receiver
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WEGMATT
LLC
1 Contents
2
Disclaimer ..................................................................................................................................2
3
Connecting dAISy to a computer .................................................................................................2
3.1
Windows 7, Vista and XP .............................................................................................................. 2
3.2
Windows 8 .................................................................................................................................... 2
3.3
Windows 10 .................................................................................................................................. 3
3.4
Mac OS X ....................................................................................................................................... 3
3.5
Linux .............................................................................................................................................. 3
3.6
Configuration of OpenCPN ............................................................................................................ 4
3.7
Connecting dAISy with other software ......................................................................................... 5
4
Using dAISy ................................................................................................................................6
4.1
Interpreting the status LED ........................................................................................................... 6
4.2
Configuration and debug menu .................................................................................................... 6
5
Using the NMEA 0183 adapter ....................................................................................................9
6
Tips for good AIS reception ....................................................................................................... 10
6.1
Antenna ....................................................................................................................................... 10
6.2
Location, location, location ......................................................................................................... 10
6.3
Radio noise .................................................................................................................................. 11
7
Troubleshooting ....................................................................................................................... 12
8
Source code and schematics...................................................................................................... 13
9
Contact .................................................................................................................................... 13
Wegmatt LLC
th
6356 138
Ave NE #212
Redmond, WA
United States of America
http://www.wegmatt.com
dAISy AIS Receiver
Designed and assembled in USA

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Summary of Contents for Wegmatt dAISy

  • Page 1: Table Of Contents

    Windows 10 ..........................3 Mac OS X ............................3 Linux .............................. 3 Configuration of OpenCPN ......................4 Connecting dAISy with other software ..................5 Using dAISy ..........................6 Interpreting the status LED ......................6 Configuration and debug menu ....................6 Using the NMEA 0183 adapter ....................9 Tips for good AIS reception .......................

  • Page 2: Disclaimer

    2 Disclaimer dAISy is a reliable, single-channel AIS Receiver. However, under no circumstances it should be solely relied on for collision avoidance or navigation. It’s the user’s responsibility to use the product prudently. Neither Wegmatt LLC nor its dealers accept responsibility or liability to the product user or their estate for any accident, loss, injury or damage whatsoever arising out of the use of this product.

  • Page 3: Windows 10

    OpenCPN below for more information. 3.5 Linux No driver is required for Linux. When plugged into the computer, dAISy will show up as a USB CDC device on /dev/ttyACM0. Detailed instructions for Linux can be found here: https://mvcesc.wordpress.com/2015/04/28/opencpn-...

  • Page 4: Configuration Of Opencpn

    You can learn more about OpenCPN and download it on the OpenCPN web page: http://opencpn.org To use dAISy with OpenCPN, go to the Options dialog, select the Connections icon and add a new connection. Set Properties to Serial. Enter or select the Dataport under which dAISy presents itself (see OS-specific chapters above to determine the correct port).

  • Page 5: Connecting Daisy With Other Software

    38400 Data bits Parity None Stop bits Flow control None Depending on the software dAISy is used with, some or all of these parameters have to be configured. For details, please refer to the instruction manual of the respective application.

  • Page 6: Using Daisy

    4 Using dAISy Using dAISy is as simple as connecting it with an antenna and a PC and powering up your AIS capable application of choice. When plugged in, dAISy automatically starts to listen for AIS transmissions. 4.1 Interpreting the status LED dAISy has a single, two-color status LED, giving us some indication about how it’s feeling.
  • Page 7 N: Keep pressed to get an idea of the current noise level. -120 to -100 dBm is normal. dAISy will only be able to receive valid packets roughly 15 dBm above that level, consistent reception 25+ dBm above noise.
  • Page 8 A and B. R: Turn RSSI Detect on or off. When RSSI detect is on, dAISy will ignore signals that are too weak for reliable communication. This may increase the number of local messages received, but it will also reduce the maximum range.

  • Page 9: Using The Nmea 0183 Adapter

    NMEA connection two-wire NMEA connection By default, dAISy is configured to output at 38400 Baud (NMEA high speed). This can be changed to other baud rates in the configuration and debug menu. You also need to check the configuration of your chartplotter.

  • Page 10: Tips For Good Ais Reception

    6 Tips for good AIS reception dAISy is not the most sensitive AIS receiver out there. But you we can help it to excel with some basic measures. 6.1 Antenna If everything else is optimal, almost any antenna tuned to the VHF band will do. I used a simple wire cut to length for my first prototypes.

  • Page 11: Radio Noise

    (taxi radios). dAISy has an integrated 12 MHz wide bandpass filter to reduce the impact of radio noise outside the 162 MHz target frequency. However, to keep cost and size down, the integrated filter is rather simple. A very narrow-band antenna or an external bandpass filter can improve reception.

  • Page 12: Troubleshooting

    After some time, dAISy indicates a device error Sometimes the device is not properly initialized (fast blinking red LED) when the connected computer wakes up from sleep mode. Unplug dAISy and plug in again to resolve the error. If a problem persists, don’t hesitate to contact us.

  • Page 13: Source Code And Schematics

    The core of dAISy, how the Si4362 radio IC is programmed to receive AIS, is available on Github. While the project does not include all the functionality of dAISy as sold, I do backport any bug fixes that are relevant to the task of receiving AIS.

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