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Author Topic: What is NMEA?  (Read 4375 times)

USG_TECH7

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What is NMEA?
« on: November 12, 2008, 04:45:29 pm »

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

;)
« Last Edit: November 12, 2008, 04:48:07 pm by USG_TECH7 »
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_Maxou_

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Re: What is NMEA?
« Reply #1 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!
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USG_TECH9

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Re: What is NMEA?
« Reply #2 on: June 29, 2009, 03:34:38 pm »

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!

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
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Brett

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Re: What is NMEA?
« Reply #3 on: August 18, 2010, 04:10:44 am »

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

Damon

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Re: What is NMEA?
« Reply #4 on: September 26, 2010, 11:31:00 pm »

hello guys...
thanks for sharing information..
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saim

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Re: What is NMEA?
« Reply #5 on: December 01, 2010, 02:04:01 am »

hey guys........
  NMEA 0183 (or NMEA for short) is a combined electrical and data specification for communication between marine electronic devices such as echo sounder, sonars, anemometer (wind speed and direction), gyrocompass, autopilot, GPS receivers and many other types of instruments. ...
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