diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b615718..f4b6d51 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: v4.4.0
+    rev: v4.0.1
     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: 2.7.1
+    rev: 2.3.54
     hooks:
       - id: editorconfig-checker
         args:
@@ -35,19 +35,16 @@ repos:
       - id: flake8
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.2.0
+    rev: v0.910-1
     hooks:
       - id: mypy
-        args:
-          - "--install-types"
-          - "--non-interactive"
 
   - repo: https://github.com/psf/black
-    rev: 23.3.0
+    rev: 21.10b0
     hooks:
       - id: black
 
   - repo: https://github.com/PyCQA/isort
-    rev: 5.12.0
+    rev: 5.9.3
     hooks:
       - id: isort
diff --git a/Connector.md b/Connector.md
index 38562cb..a880051 100644
--- a/Connector.md
+++ b/Connector.md
@@ -1,8 +1,7 @@
 # Connector
 
-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.
+The connector is a RJ12 (6P6C, phone connector with all 6 positions populated)
+The interface uses RS-232 levels (±15V)
 
 ## Pinout
 
diff --git a/config-example.yaml b/config-example.yaml
deleted file mode 100644
index 7aca723..0000000
--- a/config-example.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-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
deleted file mode 100644
index 7ea6505..0000000
--- a/misc/test_serial.py
+++ /dev/null
@@ -1,29 +0,0 @@
-# -*- 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
deleted file mode 100644
index 3351171..0000000
--- a/misc/test_serial_loopback.py
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- 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 5a919f0..a12f1d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,3 @@ rrdtool
 bluepy
 libscrc
 paho-mqtt
-pyserial
-
-types-PyYAML
diff --git a/srnemqtt/__main__.py b/srnemqtt/__main__.py
index 38d8058..70cb669 100755
--- a/srnemqtt/__main__.py
+++ b/srnemqtt/__main__.py
@@ -5,34 +5,28 @@ import time
 from decimal import Decimal
 from typing import cast
 
-from bluepy.btle import BTLEDisconnectError
-from serial import SerialException
+from bluepy import btle
 
-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):
-    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 get_interface() as dev:
+                with BTLEUart(MAC, timeout=5) as dev:
                     log("Connected.")
 
                     # write(dev, construct_request(0, 32))
@@ -102,7 +96,7 @@ def main():
                     # else:
                     #    write(wd, CMD_ENABLE_LOAD)
 
-            except CommunicationError:
+            except btle.BTLEDisconnectError:
                 log("ERROR: Disconnected")
                 time.sleep(1)
 
diff --git a/srnemqtt/config.py b/srnemqtt/config.py
index 4b3a4c1..de435eb 100644
--- a/srnemqtt/config.py
+++ b/srnemqtt/config.py
@@ -6,8 +6,6 @@ from typing import Any, Dict, List, Optional, Type
 
 import yaml
 
-from srnemqtt.interfaces import BaseInterface
-
 from .consumers import BaseConsumer
 
 
@@ -54,30 +52,6 @@ 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
deleted file mode 100644
index e8ecc37..0000000
--- a/srnemqtt/interfaces/__init__.py
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- 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
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