diff --git a/src/SmsGateway/Sender/FileSender.php b/src/SmsGateway/Sender/FileSender.php
index 3c6f96a..6c8f9a8 100644
--- a/src/SmsGateway/Sender/FileSender.php
+++ b/src/SmsGateway/Sender/FileSender.php
@@ -51,7 +51,7 @@ class FileSender implements SenderInterface
         return $this->logger;
     }
 
-    public function send($username, $recipient, $message, $passwordLocations)
+    public function send($username, $recipient, $message, array $passwordLocations)
     {
         $rcptDir = $this->messageDir . '/' . $recipient;
 
diff --git a/src/SmsGateway/Sender/GnokiiSender.php b/src/SmsGateway/Sender/GnokiiSender.php
index 04a7eb7..e852d79 100644
--- a/src/SmsGateway/Sender/GnokiiSender.php
+++ b/src/SmsGateway/Sender/GnokiiSender.php
@@ -2,21 +2,70 @@
 namespace SmsGateway\Sender;
 
 use SmsGateway\SenderInterface;
+use SmsGateway\LoggerInterface;
 
 class GnokiiSender implements SenderInterface
 {
+    /**
+     *
+     * @var SmsGateway\LoggerInterface $logger
+     */
+    private $logger;
+
     private $gnokiiPath;
 
     public function __construct($gnokiiPath)
     {
-        $this->gnokiiPath = $gnokiiPath;
-
         if (!is_executable($this->gnokiiPath)) {
             throw new \Exception('Specified Gnokii executable is not executable by me!');
+        }
+
+        $this->gnokiiPath = $gnokiiPath;
     }
 
-    public function send($recipient, $message)
+    public function send($username, $recipient, $message, array $passwordLocations)
     {
+        if ($this->logger === null) {
+            throw new \LogicException('Logger is not defined!');
+        }
+
+        $descriptors = array(
+            0 => array('pipe', 'r'),
+            1 => array('pipe', 'w'),
+            2 => array('pipe', 'w'),
+        );
+        $cmd = escapeshellcmd($this->gnokiiPath . ' --sendsms ' . escapeshellarg($recipient));
+        $pipes = array();
+        $process = proc_open($cmd, $descriptors, $pipes, null, array('LANG' => 'en_US.UTF-8'));
+        if (is_resource($process)) {
+            fwrite($pipes[0], $message);
+            fclose($pipes[0]);
+
+            $stdout = stream_get_contents($pipes[1]);
+            $stderr = stream_get_contents($pipes[2]);
+            $returnValue = proc_close($process);
+
+            if ($returnValue != 0) {
+                throw new \RuntimeException('Unable to send SMS: ' . $stderr . '; ' . $stdout);
+            }
+
+            $this->logger->messageLog($username, $recipient, $message, $passwordLocations);
+        } else {
+            throw new \RuntimeException('Unable to start Gnokii.');
+        }
+
         return true;
     }
+
+    public function setLogger(LoggerInterface $logger) {
+        if ($logger === null) {
+            throw new \RuntimeException('A logger interface must be specified!');
+        }
+
+        $this->logger = $logger;
+    }
+
+    public function getLogger() {
+        return $this->logger;
+    }
 }
diff --git a/src/SmsGateway/SenderInterface.php b/src/SmsGateway/SenderInterface.php
index f595a1e..777f46a 100644
--- a/src/SmsGateway/SenderInterface.php
+++ b/src/SmsGateway/SenderInterface.php
@@ -15,5 +15,5 @@ interface SenderInterface
      * @throws Exception         Upon sending error. Gnokii output will be
      *                           stored in $e->message
      */
-    public function send($username, $recipient, $message, $passwordLocations);
+    public function send($username, $recipient, $message, array $passwordLocations);
 }