Display GPS speed from iPhone/iPad on Raymarine Instruments?? - SailNet Community
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post #1 of 7 Old 06-06-2019 Thread Starter
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Display GPS speed from iPhone/iPad on Raymarine Instruments??

OK...my Raymarine (TackTick) wireless instruments have a problem with the speed transducer and because my boat was designed so long ago the location of the original transducer (where the speed transducer was installed) does not allow me access to remove it without pulling the boat. So in the meantime I had a wild thought. Can my iPhone (or iPad) transmit the GPS speed via NMEA and display it on my boat instruments? I have the Raymarine super sail pack with the NMEA module and a Bidirectional Wifi NMEA Router system so I can see the boat data on the iPhone and iPad. On the iPhone I can run a GPS app and get the GPS speed. It will transmit GPS, compass, and all that info. Anyone know if the speed info can be displayed on the Raymarine displays? This would be a cheap way to get my speed data on the instruments until I can pull the boat and swap the transducer.

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post #2 of 7 Old 06-07-2019
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Re: Display GPS speed from iPhone/iPad on Raymarine Instruments??

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Originally Posted by NewportNewbie View Post
OK...my Raymarine (TackTick) wireless instruments have a problem with the speed transducer and because my boat was designed so long ago the location of the original transducer (where the speed transducer was installed) does not allow me access to remove it without pulling the boat. So in the meantime I had a wild thought. Can my iPhone (or iPad) transmit the GPS speed via NMEA and display it on my boat instruments? I have the Raymarine super sail pack with the NMEA module and a Bidirectional Wifi NMEA Router system so I can see the boat data on the iPhone and iPad. On the iPhone I can run a GPS app and get the GPS speed. It will transmit GPS, compass, and all that info. Anyone know if the speed info can be displayed on the Raymarine displays? This would be a cheap way to get my speed data on the instruments until I can pull the boat and swap the transducer.
Your transducer measures speed through the water.....the iPad speed is speed over ground....They are two different things
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I know that but SOG is better than the display reading 0.0. Like i said until i pull the boat its something. And if i can do it with a cost of zero its a win.
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Re: Display GPS speed from iPhone/iPad on Raymarine Instruments??

Is the NMEA bi-directional? I believe it gets its speed information from the wiring going into the hub. So it will send the speed info it is receiving via wires over the NMEA net, but I don't know that the hub will receive info wirelessly. Also, you might be running a phased out version of NMEA like 0183 and your Ipad might only read NMEA 2000.
Are you saying that the knot meter is not a removable plug? Even old versions were removable.

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Yes NMEA bidirectional. The NMEA wifi bridge is NMEA 0183. The speed screen is getting info from the transducer but there is a screen that has SOG and that is getting the info from NMEA GPS so if i get that on the NMEA data stream it SHOULD display on the instruments.

The speed transducer is in a place where this isnt enough room to access it from above.

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Last edited by NewportNewbie; 06-08-2019 at 03:16 AM.
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Re: Display GPS speed from iPhone/iPad on Raymarine Instruments??

Update....I didn't have the NMEA input wire connected from the NMEA Wifi interface. Once I connected that GPS information showed up on the displays! SOG, COG, HDG, tack degrees, longitude, latitude, etc. I used an old iPhone I had laying around running GPS2IP app. The app was $6 and it allows the native iPhone GPS to be transmitted over wifi to the NMEA stream.

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Re: Display GPS speed from iPhone/iPad on Raymarine Instruments??

Here are some pics....
https://www.sailnet.com/forums/attac...-img_2146.jpeg
https://www.sailnet.com/forums/attac...-img_2147.jpeg
https://www.sailnet.com/forums/attac...-img_2148.jpeg
Attached Thumbnails
IMG_2146.jpeg   IMG_2147.jpeg   IMG_2148.jpeg  

S/V Cuajota - 1975 WD Schock Santana 30

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