Send HTTP get request from GSM SIM800c and Arduino
You haven't instructed the module to make a request yet.
With the AT+HTTPPARA command, you are just configuring the request you want to make. In your case, you just specified the URL you want to call.
Next, you have to send
AT+HTTPACTION=1 

to make the actual request using the HTTP GET method, and then you can read the HTTP response using
AT+HTTPREAD 

Keep in mind that after AT+HTTPACTION you will receive an unsolicited result code in the format
+HTTPACTION: &lt;Method&gt;,&lt;StatusCode&gt;,&lt;DataLen&gt;

this will happen after the module will actually do the request and will have the response.