wrote a bit about usage

readme.md

@@ -13,4 +13,24 @@ and copy default configuration by invoking `$ php artisan vendor:publish` comman
 
 ## Usage
 
-To be continued...
+You can use the service pretty straightforward and inject dependency in your controller:
+
+```php
+<?php
+
+namespace App\Http\Controllers;
+
+class SmsController extends Controller
+{
+ public function send(SmppServiceInterface $smpp)
+ {
+ // One number
+ $this->smpp->sendOne(1234567890, 'Hi, this SMS was send via SMPP protocol');
+
+ // Multiple numbers
+ $this->smpp->sendBulk([1234567890, 0987654321], 'Hi!');
+ }
+}
+```
+
+However it is better to abstract your SMS sending service from the SMPP implementation by defining a SMPP-compatible service interface.