diff --git a/config-example.yaml b/config-example.yaml
deleted file mode 100644
index cc72de9..0000000
--- a/config-example.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-consumers:
-  stdio.StdoutConsumer: {}
-interface:
-  name: serial.SerialInterface
-  params:
-    device: /dev/ttyUSB0
-    baudrate: 9600
-    timeout: 2
-#  name: feasycom.FeasycomInterface
-#  params:
-#    mac: DC:0D:30:9C:61:BA
-#    timeout: 5
diff --git a/srnemqtt/__main__.py b/srnemqtt/__main__.py
index 38d8058..4470d7b 100755
--- a/srnemqtt/__main__.py
+++ b/srnemqtt/__main__.py
@@ -8,13 +8,15 @@ from typing import cast
 from bluepy.btle import BTLEDisconnectError
 from serial import SerialException
 
-from .config import get_config, get_consumers, get_interface
+from .config import get_config, get_consumers
+from .constants import MAC
+from .lib.feasycom_ble import BTLEUart
 from .protocol import parse_battery_state, parse_historical_entry, try_read_parse
 from .solar_types import DataName
 from .util import Periodical, log
 
 
-class CommunicationError(BTLEDisconnectError, SerialException, IOError):
+class CommunicationError(BTLEDisconnectError, SerialException):
     pass
 
 
@@ -32,7 +34,7 @@ def main():
         while True:
             try:
                 log("Connecting...")
-                with get_interface() as dev:
+                with BTLEUart(MAC, timeout=5) as dev:
                     log("Connected.")
 
                     # write(dev, construct_request(0, 32))
diff --git a/srnemqtt/config.py b/srnemqtt/config.py
index c9c95d4..2b680a7 100644
--- a/srnemqtt/config.py
+++ b/srnemqtt/config.py
@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 import importlib
 import os
+from io import RawIOBase
 from time import sleep
 from typing import Any, Dict, List, Optional, Type
 
 import yaml
 
-from srnemqtt.interfaces import BaseInterface
-
 from .consumers import BaseConsumer
 
 
@@ -54,28 +53,21 @@ def get_consumers(conf: Optional[Dict[str, Any]] = None) -> List[BaseConsumer]:
     return consumers
 
 
-def _get_interface(name: str) -> Type[BaseInterface]:
-    mod_name, cls_name = name.rsplit(".", 1)
-
-    mod = importlib.import_module(f".consumers.{mod_name}", package=__package__)
-
-    res = getattr(mod, cls_name)
-    assert issubclass(res, BaseConsumer)
-
-    return res
-
-
-def get_interface(conf: Optional[Dict[str, Any]] = None) -> BaseInterface:
+def get_producers(conf: Optional[Dict[str, Any]] = None) -> List[RawIOBase]:
+    raise NotImplementedError
     if conf is None:
         conf = get_config()
 
-    name = conf["interface"]["name"]
-    params = conf["interface"].get("params", {})
+    consumers = []
+    for name, consumer_config in conf["consumers"].items():
+        # print(name, consumer_config)
+        mod = get_consumer(name)
+        if mod:
+            # print(mod)
+            consumers.append(mod(consumer_config))
 
-    mod = _get_interface(name)
-    assert mod
-
-    return mod(**params)
+    write_config(conf)
+    return consumers
 
 
 if __name__ == "__main__":
diff --git a/srnemqtt/interfaces/feasycom.py b/srnemqtt/interfaces/feasycom.py
deleted file mode 100644
index 82a1172..0000000
--- a/srnemqtt/interfaces/feasycom.py
+++ /dev/null
@@ -1,10 +0,0 @@
-# -*- coding: utf-8 -*-
-from ..lib.feasycom_ble import BTLEUart
-from . import BaseInterface
-
-
-class FeasycomInterface(BTLEUart, BaseInterface):
-    pass
-
-
-# BTLEUart(mac=MAC, timeout=5)
diff --git a/srnemqtt/interfaces/serial.py b/srnemqtt/interfaces/serial.py
deleted file mode 100644
index bee3ff6..0000000
--- a/srnemqtt/interfaces/serial.py
+++ /dev/null
@@ -1,8 +0,0 @@
-# -*- coding: utf-8 -*-
-import serial
-
-from . import BaseInterface
-
-
-class SerialInterface(serial.Serial, BaseInterface):
-    pass
diff --git a/srnemqtt/interfaces/__init__.py b/srnemqtt/sources/__init__.py
similarity index 62%
rename from srnemqtt/interfaces/__init__.py
rename to srnemqtt/sources/__init__.py
index e8ecc37..5d697bc 100644
--- a/srnemqtt/interfaces/__init__.py
+++ b/srnemqtt/sources/__init__.py
@@ -3,5 +3,5 @@ from abc import ABCMeta
 from io import RawIOBase
 
 
-class BaseInterface(RawIOBase, metaclass=ABCMeta):
+class BaseSource(RawIOBase, metaclass=ABCMeta):
     pass
diff --git a/srnemqtt/sources/feasycom.py b/srnemqtt/sources/feasycom.py
new file mode 100644
index 0000000..c3c0859
--- /dev/null
+++ b/srnemqtt/sources/feasycom.py
@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+# from ..lib.feasycom_ble import BTLEUart
+from . import BaseSource
+
+
+class FeasycomSource(BaseSource):
+    pass
diff --git a/srnemqtt/sources/serial.py b/srnemqtt/sources/serial.py
new file mode 100644
index 0000000..7322a31
--- /dev/null
+++ b/srnemqtt/sources/serial.py
@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+# import serial
+
+from . import BaseSource
+
+
+class SerialSource(BaseSource):
+    pass