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#11
posted to rec.boats.electronics
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Ethernet
On Tue, 11 Nov 2008 09:02:26 +0100, "Steve Lusardi"
wrote: If you know a source for the multi wire 16 ga cable, please let me know. http://www.multicable.com/request_info.asp |
#12
posted to rec.boats.electronics
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Ethernet
In article ,
Wayne.B wrote: On Tue, 11 Nov 2008 09:02:26 +0100, "Steve Lusardi" wrote: If you know a source for the multi wire 16 ga cable, please let me know. http://www.multicable.com/request_info.asp The Big Time Telco Wire Suppliers have such stuff. Sprint/North Supply is where I get my Telco Wire. -- Bruce in alaska add path after fast to reply |
#13
posted to rec.boats.electronics
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Ethernet
Hi group
Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Or what do you think? sincerely /Børge "Meindert Sprang" skrev i meddelelsen ... "Steve Lusardi" wrote in message ... Colin, I completely agree. There has been a recent thread in this NG on this very subject. See www.gridconnect.com Their serial to Ethernet gateway products should be just what you are looking for and they are DC powered. If I am correct, all of these products only offer a serial point to point connection over ethernet, which seems quite pointless to me when you want to distribute NMEA from instruments to ANY device on the net. None of these devices offer the possibility to *broadcast* NMEA data to any device on the net who wants to receive it. Oh and one other thing: on commercial vessels, including luxurious megayachts, you will not find standard cheap CAT5 cable because that will not pass any marine/industrial regulation. The sort of cable used is much more expensive and meets all sorts of requirements for mechanical, chemical and fire resistance not found in the usual PC/networking market. Meindert |
#14
posted to rec.boats.electronics
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Ethernet
"Børge Wedel Müller" wrote in message
... Hi group Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Yes, but only if you can configure the serial/ethernet gateway to send a frame when a CR/LF is received. This will result in an ethernet frame per NMEA sentence. If you don't do this, the gateway could collect as much NMEA data to fill a reasonably sized ethernet frame 1000-1500 bytes and then send it off. This would result in very irregular heading information. Meindert |
#15
posted to rec.boats.electronics
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Ethernet
"Meindert Sprang" wrote in
: "Børge Wedel Müller" wrote in message ... Hi group Just thinking. I good fluxgate compass is running at least 10HZ, directly to the wheel/autopilot. Most other NMEA devices need a similar update frekvens. Will at NMES/seriel to ethernet system, be able to be fast enough to colect all the data, forward them, and decode them into seriel again, in a "timely" matter (that is probaply sub 0.1sec??) Yes, but only if you can configure the serial/ethernet gateway to send a frame when a CR/LF is received. This will result in an ethernet frame per NMEA sentence. If you don't do this, the gateway could collect as much NMEA data to fill a reasonably sized ethernet frame 1000-1500 bytes and then send it off. This would result in very irregular heading information. Meindert http://www.i****chdogs.com/DataSheets/WF111803.pdf That's probably what ours does. I've never seen the data coming into The Cap'n through the virtual serial port on a Dell Latitude laptop balk over the wifi. The serial port on the webfoot is plugged into the serial port on a Noland NMEA multiplexer. The Webfoot ethernet port feeds a port on an old Netgear wifi router. The data is fast and smooth even at the other end of the dock! The Cap'n thinks it has COM4 hooked to it, when in reality its via wifi. Caused quite a stir the first time I took it into the yacht club bar running. Now you can even see the AIS plotted on it! |