# GPS and TCP/IP **URL:** \ **Category:** Legacy AirPrime modules\ **Created:** [June 17, 2008, 9:47am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252 "2008-06-17T09:47:34Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Agathe\_N](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@Agathe\_N](https://forum.sierrawireless.com/u/Agathe_N)\ **Post date:** [June 17, 2008, 9:47am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/1 "2008-06-17T09:47:34Z")
Hello, I need to developp a program on the WMP100 development kit with the GPS plug-in development kit. This program has to read informations from the GPS (latitude, longitude, time) and send this informations to a server using UDP protocol. The problem is I’m a beginner in Open AT and I have difficulties to understand how does it work! For now, I can send messages to the server but only using the exemple program. I can’t send when I want in an other program. And I have got problems with my GPS too because when I execute exemple programs the fix is never obtained and the NMEA frames contains only 0 or non significant numbers. If somebody has some informations it can help me very much! Thank you ---
**Author:** ![trthaithong](https://avatars.discourse-cdn.com/v4/letter/t/22d042/32.png) [@trthaithong](https://forum.sierrawireless.com/u/trthaithong)\ **Post date:** [June 19, 2008, 9:35am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/2 "2008-06-19T09:35:44Z")
Hi Agathe N, > [@](#): > > For now, I can send messages to the server but only using the exemple program. I can’t send when I want in an other program. → You can develop your own appl base on sample program to get and process PVT data. Of-course, firstly you must to understand sample code thoroughly. > [@](#): > > And I have got problems with my GPS too because when I execute exemple programs the fix is never obtained and the NMEA frames contains only 0 or non significant numbers. → Do you enable antenna, or test at over clear sky? ttt ---
**Author:** ![Agathe\_N](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@Agathe\_N](https://forum.sierrawireless.com/u/Agathe_N)\ **Post date:** [June 19, 2008, 9:58am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/3 "2008-06-19T09:58:13Z")
Thank you for your answer. I realise a program in wich I can communicate with a sever in UDP so that point is good! However about the GPS I have the same problem. I contacted my provider but he didn’t explain to me how to enable antenna. Can you explain? What I checked is that the UART1 and 2 are enable. But I don’t now about the antenna. Thank you. ---
**Author:** ![trthaithong](https://avatars.discourse-cdn.com/v4/letter/t/22d042/32.png) [@trthaithong](https://forum.sierrawireless.com/u/trthaithong)\ **Post date:** [June 20, 2008, 6:31am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/4 "2008-06-20T06:31:26Z")
Hi, I have tested on Fastrack Supreme 20 (Query Application Sample) following steps: Config one time after download firmware or the first time run modem: AT+WOPEN=0 AT+WOPEN=3 AT+WDWL … Download Embedded appli AT+CFUN=1 > > AT+WOPEN=1 > > AT+WHCNF=0,0 > > AT+WIOM=8,1,0 > > AT+WIOW=8,0 To debug: AT+NMEA=1 (or = 0) AT+CGPS = 2 AT+CONFIG=1 (To save and run always run appl) (Can send SMS for PVT obtaining: INFO:“Password”:“Phonenumber” ) {Exp: INFO:CGPS[:telephone number]} To change debug: AT+CONFIG=0 AT+WOPEN=0 AT+WOPEN=1 … Same these above debug steps. Hope can help you, ttt ---
**Author:** ![Agathe\_N](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@Agathe\_N](https://forum.sierrawireless.com/u/Agathe_N)\ **Post date:** [June 20, 2008, 7:06am UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/5 "2008-06-20T07:06:42Z")
Hi, I execute the command you wrote but I obtained that : AT+WHCNF=0,0 OK AT+WIOM=8,1,0 +CME ERROR: 3 AT+WIOW=8,0 +CME ERROR: 501 And the NMEA frames are the same. I think it’s because I use a WMP100 and my provider confirmed to me that the antenna is automatically activate and no command is nedded to activate it. So the problem still exist! ---
**Author:** ![Agathe\_N](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@Agathe\_N](https://forum.sierrawireless.com/u/Agathe_N)\ **Post date:** [June 20, 2008, 2:47pm UTC](https://forum.sierrawireless.com/t/gps-and-tcp-ip/2252/6 "2008-06-20T14:47:12Z")
I resolve the problem and it was so stupid! The antenna connector was not connected to the board! The welding didn’t exist. I did it and now it work very well! Thank you for your help.