I am using EVK V3 USB board which having GM 862 Quad modem.I have issued a set of AT commands to communicate with www.google.com.But i got no carrier after some commands i issued.
GET/HTTP/1.1then pressed Enter after that i typed Host:www.google.combut this line overwrote on the firstline(GET/HT…) which i entered just before,then typed Connection:Keep-alivethen samething happened,over wrote on 2nd line like first line then
.After tat i waited for some while had got
Return :NO CARRIER
Also i have changed the Signal Strength by AT+CSQ,it returned 30.
Can any Suggest me where am i wrong ? Suggest me any solution
That's not a valid command for a web server. Try this:
```
GET / HTTP/1.1
```
Notice the two spaces I added. The line consists of three space-separated parameters: a command (GET), a pathname (/), and a protocol (HTTP/1.1).
Also note that “” is a common abbreviation for a carriage return (Control-M), and “” stands for line feed (Control-J) - you weren’t supposed to type those in literally. With many servers, you can just hit Enter instead, although that’s not technically correct.
Sorry, I can’t duplicate this problem when connecting to google.com via telnet (which should work just the same as via your GM862).
Are you typing the commands correctly on the first try? Keep in mind that there is no line editing once you’re connected to the server. For your testing, you may want to create a text file with the GET command and any following header lines, which can be sent without having to retype it all correctly each time.