nmea

How do I find broken NMEA log sentences with grep?

My GPS logger occassionally leaves "unfinished" lines at the end of the log files. I think they're only at the end, but I want to check all lines just in case. A sample complete sentence looks like: $GPRMC,005727.000,A,3751.9418,S,14502.2569,E,0.00,339.17,210808,,,A*76 The line should start with a $ sign, and end with an * and a tw...

C# open source NMEA parser

Am looking for C# open source NMEA parser. ...

Parsing GPS receiver output via regex in Python

I have a friend who is finishing up his masters degree in aerospace engineering. For his final project, he is on a small team tasked with writing a program for tracking weather balloons, rockets and satellites. The program receives input from a GPS device, does calculations with the data, and uses the results of those calculations to con...

GPS Time synchronisation

I'm parsing NMEA GPS data from a device which sends timestamps without milliseconds. As far as I heard, these devices will use a specific trigger point on when they send the sentence with the .000 timestamp - afaik the $ in the GGA sentence. So I'm parsing the GGA sentence, and take the timestamp when the $ is received (I compensate for...

Roll your own NMEA parser or use an open source GPS parser?

I do a lot of location aware computing, often incorporating GPS. I have my own little simple NMEA parser that doesn't do anything special - just transforms the GPS specific sentences into usable numbers, flags, and so forth. However, there is a lot of active development done on projects such as GPSD and Gypsy. If GPS were a simple mat...

How to get NMEA from the GPS Device ?

Hi there.im trying to read the current position of GPS Device...using N95 from Nokia. I read tht i will need my device to return the NMEA lines to the serialport and then i will parse/split it to get things I want but all along I dont know what to write to the serialport to make device return the NMEA ? Like There are other commands of ...

read NMEA sentences from GPS

I have a Mio P550 device, which has a GPS included. I try to use SerialPort to get NMEA sentences, by simply use SerialPort.Read(). Data is returned in some weird encoding. GPS should return NMEA sentences in ASCII, but it doesn't. Here is my code for reading: dataLength = this.serialPort.Read(buffor, 0, Gps.BUFFOR_LENGT...

How to send/receive nmea string over tcpip/udp

Hi there! I have a gps receiver, which can send data (using gprs connection) to the server www.example.com. Now I need something to receive this data (gps nmea string) from www.example.com (probably, to listen to certain port..), parse this information and store it to my database. I have some knowledge of php and mysql. So, the questi...

Trouble parsing NMEA data from Serial Port.

I'm retrieving NMEA sentences from a serial GPS. Then string are coming across like I would expect. The problem is that when parsing a sentence like this: $GPRMC,040302.663,A,3939.7,N,10506.6,W,0.27,358.86,200804,,*1A I use a simple bit of code to make sure I have the right sentect: string[] Words = sBuffer.Split(','); ...

GPS Signal Strength Calculation

I want to display a signal bar for a GPS device using .NET CF. I'm able to read NMEA data and get the SNR signals. But they are a number of satellites with some active and some inactive with various SNRs. I thought about getting average of total SNR but it won't give a accurate value as three strong signal satellite is enough for GPS fix...

how do i get nmea sentences on android when the API method does not work

Hi, I have the same problem related here on a Samsung galaxy spica and i tried all suggestions but i still don't get the nmea sentences in my application. So is there a other way to get the nmea sentences ? Is someone else facing this issue with the same device ? Thanks. ...

Odd ASCII characters in NMEA 0813 data stream

Hello, i have been trying to read the NMEA data stream from my GPS receiver connected to a bluetooth module BlueNiceCom3 using various terminal programs (HTerm, MTTTY) but what i received was always like this: C O"i „ $GPGGA,0i „ 85649.99i „ 9,4900.1i „ 692,N,01i „ 205.7215i „ ,E,0,00,i „ 0.0,433.i „ 7,M,0.0,i „ M,,0000*i „ 67 $GPGi „ ...