GSM_UBlox_Leon G100_SMS Demo

[Craig]

The UBlox G100 Is Using RS232 (Usart) To Communicate with the Micro controller. You can use UBlox's Tools For Free For testing the GSM Units, They are Beautifully set out
and can be downloaded from their website. This code can be modified to use on the SIM800 etc Just Check in the Relevant Data Sheet to See what the Correct AT Commands are to Do a Specific Task
For the Module that you are using.
Regards
Craig