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What is NMEA?

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USG_TECH7:
Welcome everyone!!!
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You ask yourself ...what is NMEA?
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NMEA is a standard protocol, used by GPS receivers to transmit data. NMEA output is EIA-422A but for most purposes you can consider it RS-232 compatible. Use 9600 BPS, 8 data bits, no parity and one stop bit (8N1). NMEA 0183 sentences are all ASCII. Each sentence begins with a dollar sign ($) and ends with a carriage return linefeed (<CR><LF>). Data is comma delimited. All commas must be included as they act as markers. Some GPS do not send some of the fields. A checksum is optionally added (in a few cases it is mandatory). Following the $ is the address field aaccc. aa is the device ID. GP is used to identify GPS data. Transmission of the device ID is usually optional. ccc is the sentence formatter, otherwise known as the sentence name.
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More on this topic can be found at http://www.usglobalsat.com/t-nmea.aspx 
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For a downloadble copy visit http://www.usglobalsat.com/downloads/NMEA_commands.pdf

;)

_Maxou_:
Hi,
I'm currently making an app that uses a BC-337 device. I can read and write commands to the device without problems. I would like to use the waas for a better precision. What is the command to enable/disable the WAAS?? Can someone help me?

Thank You!

USG_TECH9:

--- Quote from: _Maxou_ on June 10, 2009, 08:21:00 am ---Hi,
I'm currently making an app that uses a BC-337 device. I can read and write commands to the device without problems. I would like to use the waas for a better precision. What is the command to enable/disable the WAAS?? Can someone help me?

Thank You!

--- End quote ---

Hello Maxou,

Insert the NMEA command of SiRFstarIII.
It is a comment after a semicolon(;).

$PSRF151,<DGPSSource>*CKSUM<CR><LF>
DGPS source define
NONE = 00
SBAS(WAAS/EGNOS) = 01
Serial(RTCM-DGPS) = 02
$PSRF151,01*0F ;WAAS/EGNOS/MTSAT On

Brett:
CHECK THIS LINK FOR BETTER INFO ON NMEA .
www.gpsinformation.org/dale/nmea.htm#intro

Damon:
hello guys...
thanks for sharing information..

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