diff --git a/LedD/controller.py b/LedD/controller.py
index d72b646..2f25a28 100644
--- a/LedD/controller.py
+++ b/LedD/controller.py
@@ -1,6 +1,9 @@
+from json import JSONEncoder
+
 import smbus
 from colour import Color
 
+
 PCA9685_SUBADR1 = 0x2
 PCA9685_SUBADR2 = 0x3
 PCA9685_SUBADR3 = 0x4
@@ -44,12 +47,12 @@ class Controller:
     def save_to_db(self):
         cur = self.db.cursor()
         if self.id == -1:
-            cur.execute("INSERT INTO controller (pwm_freq, channels, i2c_device, address) VALUES ()",
+            cur.execute("INSERT INTO controller (pwm_freq, channels, i2c_device, address) VALUES (?,?,?,?)",
                         (self.pwm_freq, self.channels, self.i2c_device, self.address))
             self.id = cur.lastrowid
         else:
             cur.execute("UPDATE controller SET pwm_freq=?, channels=?, i2c_device=?, address=? WHERE id = ?",
-                    (self.pwm_freq, self.channels, self.i2c_device, self.address, self.id))
+                        (self.pwm_freq, self.channels, self.i2c_device, self.address, self.id))
         cur.close()
         self.db.commit()
 
@@ -76,8 +79,9 @@ class Controller:
         return "<Controller stripes={} cid={}>".format(len(self.stripes), self.id)
 
     def set_channel(self, channel, val):
-        self.bus.write_word_data(self.address, LED0_OFF_L + 4 * channel, val * 4095)
-        self.bus.write_word_data(self.address, LED0_ON_L + 4 * channel, 0)
+        print(type(LED0_OFF_L + 4 * channel), type(val), channel, val, type(self.address))
+        self.bus.write_word_data(int(self.address, 16), LED0_OFF_L + 4 * channel, int(val * 4095))
+        self.bus.write_word_data(int(self.address, 16), LED0_ON_L + 4 * channel, 0)
 
     def get_channel(self, channel):
         return self.bus.read_word_data(self.address, LED0_OFF_L + 4 * channel)
@@ -131,3 +135,16 @@ class Stripe:
         return self._color
 
     color = property(get_color, set_color)
+
+
+class ControllerEncoder(JSONEncoder):
+    def default(self, o):
+        if isinstance(o, Controller):
+            return {
+                'id': o.id,
+                'pwm_freq': o.pwm_freq,
+                'channel': o.channels,
+                'address': o.address,
+                'stripes': o.stripes,
+                'i2c_device': o.i2c_device
+            }
diff --git a/LedD/daemon.py b/LedD/daemon.py
index dbffb65..65bb3f8 100644
--- a/LedD/daemon.py
+++ b/LedD/daemon.py
@@ -22,6 +22,8 @@ import sqlite3
 import os
 import sys
 import traceback
+import time
+
 from . import controller
 
 
@@ -104,6 +106,7 @@ class Daemon:
 
                     if "action" in json_decoded:
                         if json_decoded['action'] == "set_color":
+
                             # TODO: add adapter setting stripe with color here
                             print("recieved action: {}".format(json_decoded['action']))
                         elif json_decoded['action'] == "add_controller":
@@ -112,8 +115,9 @@ class Daemon:
                             try:
                                 ncontroller = controller.Controller(Daemon.instance.sqldb, json_decoded['channels'],
                                                                     json_decoded['i2c_dev'], json_decoded['address'])
-                            except OSError as e:
+                            except OSError:
                                 print("Error opening i2c device!")
+
                             self.send("{}\n".format(ncontroller.id).encode())
                             Daemon.instance.controllers.append(ncontroller)
                         elif json_decoded['action'] == "get_color":
@@ -124,10 +128,36 @@ class Daemon:
                                 for stripe in json_decoded['stripes']:
                                     # TODO: add stripe here
                                     print(len(json_decoded['stripes']))
+                        elif json_decoded['action'] == "get_controllers":
+                            rjson = {
+                                'status': 'success',
+                                'ccount': len(Daemon.instance.controllers),
+                                'controller': Daemon.instance.controllers
+                            }
+                            self.send("{}\n".format(json.dumps(rjson, cls=controller.ControllerEncoder)).encode())
+                        elif json_decoded['action'] == "connection_check":
+                            result = next(filter(lambda x: x.id == json_decoded['id'], Daemon.instance.controllers),
+                                          None)
+                            """ :type : Controller """
+
+                            if result is not None:
+                                print("we can do it!")
+                                for i in range(result.channels):
+                                    print("set channel {}={}".format(i, "1"))
+                                    result.set_channel(i, 1)
+                                    time.sleep(2)
+                                    result.set_channel(i, 0)
+
+                            rjson = {
+                                'status': 'success'
+                            }
+
+                            self.send("{}\n".format(json.dumps(rjson, cls=controller.ControllerEncoder)).encode())
                     else:
                         print("no action found, ignoring")
                 except TypeError as e:
                     print("No valid JSON found: {}".format(e))
+                    traceback.print_exc(file=sys.stdout)
                 except ValueError:
                     print("No valid JSON detected!")
                     traceback.print_exc(file=sys.stdout)