diff --git a/frontend/lib/constants.dart b/frontend/lib/constants.dart
new file mode 100644
index 0000000..5cdd1ca
--- /dev/null
+++ b/frontend/lib/constants.dart
@@ -0,0 +1,4 @@
+class Constants {
+  static const String BASE_URL = "http://127.0.0.1:8062";
+// static const String BASE_URL = "http://smart.gavania.de";
+}
diff --git a/frontend/lib/devices.dart b/frontend/lib/devices.dart
index 604d621..22eb5c5 100644
--- a/frontend/lib/devices.dart
+++ b/frontend/lib/devices.dart
@@ -4,14 +4,16 @@ import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
 
+import 'constants.dart';
+
 class Category {
   Category(this.name) : devices = [];
 
   final String name;
   List<Device> devices;
 
-  static Future<List<Category>> fetch(String base_url) async {
-    final response = await http.get(Uri.parse("http://$base_url/devices"));
+  static Future<List<Category>> fetch() async {
+    final response = await http.get(Uri.parse("${Constants.BASE_URL}/devices"));
 
     if (response.statusCode != 200) {
       throw Exception("Failed to fetch devices");
@@ -32,8 +34,8 @@ class Category {
         final String? device_descriptor = device_info['desc'];
         final bool power_control = device_info['toggle'];
 
-        final response =
-            await http.get(Uri.parse("http://$base_url/plug_state/$device_id"));
+        final response = await http
+            .get(Uri.parse("${Constants.BASE_URL}/plug_state/$device_id"));
 
         if (response.statusCode != 200) {
           throw Exception("Failed to fetch plug_state for $device_id");
@@ -77,18 +79,12 @@ class CategoryWidget extends StatelessWidget {
               Text(
                   textAlign: TextAlign.center,
                   device.device_descriptor ?? device.device_id),
-              TextButton(
-                child: Text(
-                    textAlign: TextAlign.center,
-                    device.led_state ? 'On' : 'Off'),
-                onPressed: () {},
-              ),
-              TextButton(
-                child: Text(
-                    textAlign: TextAlign.center,
-                    device.power_state ? 'On' : 'Off'),
-                onPressed: () {},
-              ),
+              DeviceLed(
+                  device_id: device.device_id, led_state: device.led_state),
+              DevicePower(
+                  device_id: device.device_id,
+                  power_state: device.power_state,
+                  power_control: device.power_control),
               Text(textAlign: TextAlign.center, "${device.power_draw} W")
             ]))
         .toList();
@@ -142,3 +138,123 @@ class Device {
   Device(this.device_id, this.device_descriptor, this.led_state,
       this.power_state, this.power_draw, this.power_control);
 }
+
+class DeviceLed extends StatefulWidget {
+  final String device_id;
+  final bool led_state;
+
+  DeviceLed({super.key, required this.device_id, required this.led_state});
+
+  @override
+  State<DeviceLed> createState() => DeviceLedState(device_id, led_state);
+}
+
+class DeviceLedState extends State<DeviceLed> {
+  final String device_id;
+  bool led_state;
+  String _led_state_info;
+
+  DeviceLedState(this.device_id, this.led_state)
+      : this._led_state_info = led_state ? "On" : "Off";
+
+  void _toggle_led_state() {
+    String target_state;
+
+    if (led_state) {
+      target_state = "off";
+    } else {
+      target_state = "on";
+    }
+
+    change_plug_state(device_id, "led", target_state).then((device_state) {
+      led_state = device_state["led"];
+
+      setState(() {
+        _led_state_info = led_state ? "On" : "Off";
+      });
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return TextButton(
+        onPressed: _toggle_led_state,
+        child: Text(textAlign: TextAlign.center, _led_state_info));
+  }
+}
+
+class DevicePower extends StatefulWidget {
+  final String device_id;
+  final bool power_state;
+  final bool power_control;
+
+  DevicePower(
+      {super.key,
+      required this.device_id,
+      required this.power_state,
+      required this.power_control});
+
+  @override
+  State<DevicePower> createState() =>
+      DevicePowerState(device_id, power_state, power_control);
+}
+
+class DevicePowerState extends State<DevicePower> {
+  final String device_id;
+  bool power_state;
+  String _power_state_info;
+  bool power_control;
+
+  DevicePowerState(this.device_id, this.power_state, this.power_control)
+      : this._power_state_info = power_state ? "On" : "Off";
+
+  void _toggle_power_state() {
+    String target_state;
+
+    if (power_state) {
+      target_state = "off";
+    } else {
+      target_state = "on";
+    }
+
+    change_plug_state(device_id, "power", target_state).then((device_state) {
+      power_state = device_state["power"];
+
+      power_control = device_state["power_draw"] < 15;
+
+      setState(() {
+        _power_state_info = power_state ? "On" : "Off";
+      });
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (power_control) {
+      return TextButton(
+          onPressed: _toggle_power_state,
+          child: Text(textAlign: TextAlign.center, _power_state_info));
+    } else {
+      return Text(_power_state_info, textAlign: TextAlign.center);
+    }
+  }
+}
+
+Future<Map<String, dynamic>> change_plug_state(
+    String device_id, String module, String state) async {
+  var response = await http.post(
+      Uri.parse("${Constants.BASE_URL}/plug/$device_id/${module}_$state"));
+
+  if (response.statusCode != 200) {
+    throw Exception("Failed to post new state");
+  }
+
+  response =
+      await http.get(Uri.parse("${Constants.BASE_URL}/plug_state/$device_id"));
+
+  if (response.statusCode != 200) {
+    throw Exception("Failed to fetch plug_state for $device_id");
+  }
+
+  return Map.castFrom(jsonDecode(jsonDecode(response.body)));
+}
diff --git a/frontend/lib/main.dart b/frontend/lib/main.dart
index 97b332b..8af3c60 100644
--- a/frontend/lib/main.dart
+++ b/frontend/lib/main.dart
@@ -36,8 +36,7 @@ class _MyHomePageState extends State<MyHomePage> {
   @override
   Widget build(BuildContext context) {
     return FutureBuilder<List<Category>>(
-        // future: Category.fetch("smart.gavania.de"),
-        future: Category.fetch("127.0.0.1:8062"),
+        future: Category.fetch(),
         builder: (context, AsyncSnapshot<List<Category>> categories) {
           if (!categories.hasData) {
             return const Text("still loading");