diff --git a/server/SHServ/Entities/Device.php b/server/SHServ/Entities/Device.php
index c68a1f7..681aade 100644
--- a/server/SHServ/Entities/Device.php
+++ b/server/SHServ/Entities/Device.php
@@ -4,6 +4,7 @@
 
 use \SHServ\Entities\DeviceAuth;
 use \SHServ\Tools\DeviceAPI\Base;
+use \SHServ\Tools\DeviceAPI\Relay;
 
 class Device extends \SHServ\Middleware\Entity {
 	public static $table_name = "devices";
@@ -13,8 +14,8 @@
 		"state", "description", "last_contact", "create_at", "update_at"
 	];
 
-	protected $device_auth;
-	protected $device_api;
+	protected $device_auth_instance;
+	protected $device_api_instance;
 
 	public function __construct(Int $id, Array $data = []){
 		parent::__construct(
@@ -29,9 +30,9 @@
 		return $this -> update();
 	}
 
-	public function get_auth(): DeviceAuth | null {
-		if($this -> device_auth) {
-			return $this -> device_auth;
+	public function auth(): DeviceAuth | null {
+		if($this -> device_auth_instance) {
+			return $this -> device_auth_instance;
 		}
 
 		$result = app() -> thin_builder -> select(
@@ -44,33 +45,39 @@
 			return null;
 		}
 
-		$this -> device_auth = new DeviceAuth($result[0]["id"], $result[0]);
+		$this -> device_auth_instance = new DeviceAuth($result[0]["id"], $result[0]);
 
-		return $this -> device_auth ?? null;
+		return $this -> device_auth_instance ?? null;
 	}
 
-	public function get_device_api(): Base | null {
-		if($this -> device_api) {
-			return $this -> device_api;
+	public function device_api(): Base | null {
+		if($this -> device_api_instance) {
+			return $this -> device_api_instance;
 		}
 
-		$this -> device_api = new Base($this -> device_ip);
-
-		if($this -> get_auth()) {
-			$this -> device_api -> set_local_token($this -> get_auth() -> device_token);
+		switch($this -> device_type) {
+			case "relay": 
+				$this -> device_api_instance = new Relay($this -> device_ip);
+				break;
+			default: 
+				$this -> device_api_instance = new Base($this -> device_ip);
 		}
 
-		return $this -> device_api ?? null;
+		if($this -> auth()) {
+			$this -> device_api_instance -> set_local_token($this -> auth() -> device_token);
+		}
+
+		return $this -> device_api_instance ?? null;
 	}
 
 	public function set_device_token(String $token) {
-		$this -> get_device_api() -> remote_set_token($token);
-		if(!$this -> get_auth()) 
+		$this -> device_api() -> remote_set_token($token);
+		if(!$this -> auth()) 
 			return false;
 
 
-		$this -> get_auth() -> device_token = $token;
-		$this -> device_api -> set_local_token($token);
-		return $this -> get_auth() -> update();
+		$this -> auth() -> device_token = $token;
+		$this -> device_api_instance -> set_local_token($token);
+		return $this -> auth() -> update();
 	}
 }
\ No newline at end of file
diff --git a/server/SHServ/Models/Devices.php b/server/SHServ/Models/Devices.php
index c2cacc8..6448bb0 100644
--- a/server/SHServ/Models/Devices.php
+++ b/server/SHServ/Models/Devices.php
@@ -85,13 +85,13 @@
 
 		// reset device
 		
-		if(!$device -> get_device_api() -> reset()) {
+		if(!$device -> device_api() -> reset()) {
 			return false;
 		}
 		
 		// state killed in device_auth table
 		
-		$device_auth = $device -> get_auth();
+		$device_auth = $device -> auth();
 		if(!$device_auth) {
 			return false;
 		}
diff --git a/server/SHServ/Tools/DeviceAPI/Relay.php b/server/SHServ/Tools/DeviceAPI/Relay.php
new file mode 100644
index 0000000..f88b788
--- /dev/null
+++ b/server/SHServ/Tools/DeviceAPI/Relay.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace SHServ\Tools\DeviceAPI;
+
+class Relay extends Base {
+	public function toggle_channel(int $channel_id = 0) {
+		return $this -> post_action("toggle_channel", [
+			"channel" => $channel_id
+		]);
+	}
+
+	public function set_state(bool $state) {
+		return $this -> post_action("set_state", [
+			"state" => $state ? "on" : "off"
+		]);
+	}
+
+	public function set_channel_state(bool $state, int $channel_id) {
+		return $this -> post_action("set_channel_state", [
+			"state" => $state ? "on" : "off",
+			"channel" => $channel_id
+		]);
+	}
+}
\ No newline at end of file