This diploma thesis is based around SMS module for free e-commerce solution. Because of big amount of e-commerce platforms, this dissertation focuses on creating generic solution of SMS module, which will be easily modifiable across individual platforms. The SMS module is used to notify administrators or customers about order changes. Module also contains effective SMS marketing tool, which allows, for a low price, targeting ads in a form of SMS. Including a whole lot of other functions, like statistics, history of outcoming messages, optional language mutation and other settings requested by customers.