Update README.md

Author: ostaquet

README.md

@@ -1,5 +1,5 @@
 # Arduino-SIM800L-driver
-Arduino driver for GSM/GPRS module SIMCom SIM800L
+Arduino driver for GSM/GPRS module SIMCom SIM800L to make HTTP/S connections with GET and POST methods
 
 This is a comprehensive Arduino library to make HTTP or HTTPS communication through the SIMCom SIM800L module. The library supports the HTTP, the HTTPS, GET method, POST method, GPRS setup, power mode and network registration. The library has been designed to limit the memory usage by working with the same shared buffer all the time.