diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f4b6d51..b615718 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.0.1
+    rev: v4.4.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
@@ -23,7 +23,7 @@ repos:
       - id: detect-private-key
 
   - repo: https://github.com/editorconfig-checker/editorconfig-checker.python
-    rev: 2.3.54
+    rev: 2.7.1
     hooks:
       - id: editorconfig-checker
         args:
@@ -35,16 +35,19 @@ repos:
       - id: flake8
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.910-1
+    rev: v1.2.0
     hooks:
       - id: mypy
+        args:
+          - "--install-types"
+          - "--non-interactive"
 
   - repo: https://github.com/psf/black
-    rev: 21.10b0
+    rev: 23.3.0
     hooks:
       - id: black
 
   - repo: https://github.com/PyCQA/isort
-    rev: 5.9.3
+    rev: 5.12.0
     hooks:
       - id: isort
diff --git a/Connector.md b/Connector.md
index a880051..38562cb 100644
--- a/Connector.md
+++ b/Connector.md
@@ -1,7 +1,8 @@
 # Connector
 
-The connector is a RJ12 (6P6C, phone connector with all 6 positions populated)
-The interface uses RS-232 levels (±15V)
+The connector is a RJ12 (6P6C, phone connector with all 6 positions populated).
+The interface uses RS-232 levels (±5V), make sure your adaptor can handle this! (Some adaptors require higher voltages).
+TODO: Triple check RS-232 voltages.
 
 ## Pinout
 
diff --git a/config-example.yaml b/config-example.yaml
new file mode 100644
index 0000000..7aca723
--- /dev/null
+++ b/config-example.yaml
@@ -0,0 +1,12 @@
+consumers:
+  stdio.StdoutConsumer: {}
+interface:
+  name: serial.SerialInterface
+  params:
+    port: /dev/ttyUSB0
+    baudrate: 9600
+    timeout: 2
+#  name: feasycom.FeasycomInterface
+#  params:
+#    mac: DC:0D:30:9C:61:BA
+#    timeout: 5
diff --git a/misc/test_serial.py b/misc/test_serial.py
new file mode 100644
index 0000000..7ea6505
--- /dev/null
+++ b/misc/test_serial.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+import os
+import sys
+from time import sleep
+
+from serial import Serial
+
+print(sys.path)
+sys.path.insert(1, os.path.dirname(os.path.dirname(sys.argv[0])))
+# from srnemqtt.constants import MAC
+# from srnemqtt.lib.feasycom_ble import BTLEUart
+from srnemqtt.protocol import construct_request, write  # noqa: E402
+
+for rate in [1200, 2400, 4800, 9600, 115200]:
+    print(rate)
+    with Serial("/dev/ttyUSB0", baudrate=rate, timeout=2) as x:
+        sleep(2)
+
+        print(x)
+
+        write(x, construct_request(0x0E, words=3))
+        print(x.read(3))
+        print(x.read(6))
+        print(x.read(2))
+
+        # x.timeout = 2
+
+        # print(x.read())
+        # print(x.read(1))
diff --git a/misc/test_serial_loopback.py b/misc/test_serial_loopback.py
new file mode 100644
index 0000000..3351171
--- /dev/null
+++ b/misc/test_serial_loopback.py
@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from serial import Serial
+
+with Serial("/dev/ttyUSB0", baudrate=9600, timeout=2) as x:
+    x.write(b"Hello, World!")
+    print(x.read(13))
+    print(x.read(13))
diff --git a/requirements.txt b/requirements.txt
index a12f1d1..5a919f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,6 @@ rrdtool
 bluepy
 libscrc
 paho-mqtt
+pyserial
+
+types-PyYAML
diff --git a/srnemqtt/__main__.py b/srnemqtt/__main__.py
index 70cb669..38d8058 100755
--- a/srnemqtt/__main__.py
+++ b/srnemqtt/__main__.py
@@ -5,28 +5,34 @@ import time
 from decimal import Decimal
 from typing import cast
 
-from bluepy import btle
+from bluepy.btle import BTLEDisconnectError
+from serial import SerialException
 
-from .config import get_config, get_consumers
-from .constants import MAC
-from .lib.feasycom_ble import BTLEUart
+from .config import get_config, get_consumers, get_interface
 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):
+    pass
+
+
 def main():
     conf = get_config()
     consumers = get_consumers(conf)
 
     per_voltages = Periodical(interval=15)
     per_current_hist = Periodical(interval=60)
+    # import serial
+
+    # ser = serial.Serial()
 
     try:
         while True:
             try:
                 log("Connecting...")
-                with BTLEUart(MAC, timeout=5) as dev:
+                with get_interface() as dev:
                     log("Connected.")
 
                     # write(dev, construct_request(0, 32))
@@ -96,7 +102,7 @@ def main():
                     # else:
                     #    write(wd, CMD_ENABLE_LOAD)
 
-            except btle.BTLEDisconnectError:
+            except CommunicationError:
                 log("ERROR: Disconnected")
                 time.sleep(1)
 
diff --git a/srnemqtt/config.py b/srnemqtt/config.py
index de435eb..4b3a4c1 100644
--- a/srnemqtt/config.py
+++ b/srnemqtt/config.py
@@ -6,6 +6,8 @@ from typing import Any, Dict, List, Optional, Type
 
 import yaml
 
+from srnemqtt.interfaces import BaseInterface
+
 from .consumers import BaseConsumer
 
 
@@ -52,6 +54,30 @@ 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".interfaces.{mod_name}", package=__package__)
+
+    res = getattr(mod, cls_name)
+    assert issubclass(res, BaseInterface)
+
+    return res
+
+
+def get_interface(conf: Optional[Dict[str, Any]] = None) -> BaseInterface:
+    if conf is None:
+        conf = get_config()
+
+    name = conf["interface"]["name"]
+    params = conf["interface"].get("params", {})
+
+    mod = _get_interface(name)
+    assert mod
+
+    return mod(**params)
+
+
 if __name__ == "__main__":
     conf = get_config()
 
diff --git a/srnemqtt/interfaces/__init__.py b/srnemqtt/interfaces/__init__.py
new file mode 100644
index 0000000..e8ecc37
--- /dev/null
+++ b/srnemqtt/interfaces/__init__.py
@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from abc import ABCMeta
+from io import RawIOBase
+
+
+class BaseInterface(RawIOBase, metaclass=ABCMeta):
+    pass
diff --git a/srnemqtt/interfaces/feasycom.py b/srnemqtt/interfaces/feasycom.py
new file mode 100644
index 0000000..82a1172
--- /dev/null
+++ b/srnemqtt/interfaces/feasycom.py
@@ -0,0 +1,10 @@
+# -*- 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
new file mode 100644
index 0000000..bee3ff6
--- /dev/null
+++ b/srnemqtt/interfaces/serial.py
@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+import serial
+
+from . import BaseInterface
+
+
+class SerialInterface(serial.Serial, BaseInterface):
+    pass