GPS Module

GPS/GNSS Development Boards
1

hi,

I am working on the GPS module.When i connected this with HyperTerminal of my laptop,i get a string of data.But,i am not able to decode this data.

I tried to get data on SiRF Demo software But No data is available.

pl help me to find a solution…

2

It probably uses standard NMEA format. You have to write a program to parse the data and extract the stuff you need, like longitude and latitude. It’s quite easy - look for $GPRMC, for instance, and put the following 70 (?) bytes into a buffer, then pick out the data you want.

3

Thanx for ur rply.Bt,i am not using any memory presently to store any program code.

Initially,I am using my own GPS module build by using JP7-T (SiRF protocol) and RS-232.

The data which i am getting on my Hyperterminal is the like the string pasted below:

p-46|}~r

j

2222:r**d[zZe

v

`222rp

X{"J\t#Pb:rtSpuY0|}2

&2br

"hY"2:P1njYj`

J}xpxppxpxppppppppxppp-46~}rr

j

0622Pr&y"2bLqndQ2bp

"hXx

X"J\t#Pb:rtSpu[2~}2

.d0|2222&28T1njYj`

Jpppppxppppppppppxppp-

2|}2p

pl help me out from this problem…

4

Have you selected the correct baud rate?

5

Can you set it for NMEA? You might be getting native binary data.

6

ya,i am using 9600 baud rate & also,i tried different baud rates.

how can i check that it is sending NMEA data or not???

I tried to check output on SiRF Demo software but i got no response.

Also,suggest me the way of testing my module???

7

You might try 4800 baud, since that’s the usual default rate for NMEA. The SiRF-based GPS I’ve seen data sheets for start out at 4800 baud, and would only emit SiRF binary data if you commanded them to.

8

k…i will try the 4800 baud rate. But,the data which i got on Hyperterminal is just garbage.The output is already posted by me in previous post.

->What is the format of SiRF data which we got from GPS???

->how can decode the SiRF binary data???

9

hello Everyone,

I tried a lot & finally got some output from my GPS receiver.But,the data is not readable,it seems garbage to me.

[The data was refreshing in 1 sec. which showed that GPS operates and refresh data in 1 sec]

pl help me to get the proper data.

10

Hello Mr.A

when you are looking for help online, you need to tell us as much about your problem as you can.

for example what module you are using, may be a circuit diagram, or picture of the setup, links to datasheets of the components etc. the more you tell the better answer you will get.

11

hii teekay_tk,

I have already mentioned about GPS module & its output on hyper-terminal. I agree with u but the circuit diagram is not available that why it is causing a lot of problem…

pl help me to solve this problem.

12

just draw on a piece of paper how you connected stuff up and take its pic and upload it here, i think that would be start of a circuit diagram :slight_smile: