diff --git a/examples/read_cache.py b/examples/read_cache.py
index 4595195..d94c4ff 100644
--- a/examples/read_cache.py
+++ b/examples/read_cache.py
@@ -2,7 +2,6 @@
 from os import listdir
 from os.path import isfile, join
 
-from velbusaio.const import CACHEDIR
 from velbusaio.helpers import get_cache_dir
 
 for fil in [f for f in listdir(get_cache_dir()) if isfile(join(get_cache_dir(), f))]:
diff --git a/tests/module_status_test.py b/tests/module_status_test.py
index 6f3d874..406ca0b 100644
--- a/tests/module_status_test.py
+++ b/tests/module_status_test.py
@@ -13,7 +13,6 @@
     CHANNEL_SELECTED_PROGRAM,
     NO_RTR,
     PRIORITY_LOW,
-    RTR,
 )
 from velbusaio.controller import Velbus
 from velbusaio.handler import PacketHandler
@@ -24,7 +23,6 @@
     ModuleStatusMessage2,
     ModuleStatusPirMessage,
 )
-from velbusaio.messages.select_program import SelectProgramMessage
 from velbusaio.module import Module
 
 # some modules to test
diff --git a/tests/thermostat_operating_mode_test.py b/tests/thermostat_operating_mode_test.py
index 71552f8..76cff2e 100644
--- a/tests/thermostat_operating_mode_test.py
+++ b/tests/thermostat_operating_mode_test.py
@@ -3,7 +3,6 @@
 sleep_timer values are correctly stored into the module's temperature channel.
 """
 
-import logging
 import pathlib
 
 import pytest
diff --git a/velbusaio/channels.py b/velbusaio/channels.py
index 2bb395d..114aa61 100644
--- a/velbusaio/channels.py
+++ b/velbusaio/channels.py
@@ -136,17 +136,8 @@ def __getstate__(self):
             if k != "_writer" and k != "_on_status_update" and k != "_name_parts"
         }
 
-    def to_json(self) -> dict:
-        d = self.__dict__
-        return {
-            k: d[k]
-            for k in d
-            if k != "_writer"
-            and k != "_on_status_update"
-            and k != "_name_parts"
-            and k != "_module"
-            and k != "__name__"
-        }
+    def to_cache(self) -> dict:
+        return {"name": self._name, "type": type(self).__name__}
 
     def __setstate__(self, state):
         self.__dict__.update(state)
diff --git a/velbusaio/controller.py b/velbusaio/controller.py
index 23d9d18..2a75b8c 100644
--- a/velbusaio/controller.py
+++ b/velbusaio/controller.py
@@ -7,7 +7,7 @@
 import asyncio
 import logging
 import pathlib
-import pickle
+import json
 import re
 import ssl
 from urllib.parse import urlparse
@@ -84,26 +84,19 @@ async def add_module(
         """
         Add a found module to the module cache
         """
-        mod = self._load_module_from_cache(self._cache_dir, addr)
-        if mod is not None:
-            self._log.info(f"Load module from CACHE: address:{addr}")
-            self._modules[addr] = mod
-            self._modules[addr].initialize(self.send)
-            await self._modules[addr].load(True)
-        else:
-            self._log.info(f"Load NEW module: type:{typ} address:{addr}")
-            self._modules[addr] = Module.factory(
-                addr,
-                typ,
-                data,
-                serial=serial,
-                build_year=build_year,
-                build_week=build_week,
-                memorymap=memorymap,
-                cache_dir=self._cache_dir,
-            )
-            self._modules[addr].initialize(self.send)
-            await self._modules[addr].load()
+        self._log.info(f"Load NEW module: type:{typ} address:{addr}")
+        self._modules[addr] = Module.factory(
+            addr,
+            typ,
+            data,
+            serial=serial,
+            build_year=build_year,
+            build_week=build_week,
+            memorymap=memorymap,
+            cache_dir=self._cache_dir,
+        )
+        self._modules[addr].initialize(self.send)
+        await self._modules[addr].load()
 
     async def add_submodules(self, addr: int, subList: dict[int, int]) -> None:
         for sub_num, sub_addr in subList.items():
@@ -114,17 +107,6 @@ async def add_submodules(self, addr: int, subList: dict[int, int]) -> None:
             self._modules[sub_addr] = self._modules[addr]
         self._modules[addr].cleanupSubChannels()
 
-    def _load_module_from_cache(self, cache_dir: str, address: int) -> None | Module:
-        try:
-            cfile = pathlib.Path(f"{cache_dir}/{address}.p")
-            with cfile.open("rb") as fl:
-                o = pickle.load(fl)
-                if isinstance(o, Module):
-                    return o
-        except OSError:
-            pass
-        return None
-
     def get_modules(self) -> dict:
         """
         Return the module cache
diff --git a/velbusaio/handler.py b/velbusaio/handler.py
index c454433..909b9f0 100644
--- a/velbusaio/handler.py
+++ b/velbusaio/handler.py
@@ -8,7 +8,6 @@
 import asyncio
 import json
 import logging
-import re
 from typing import TYPE_CHECKING, Awaitable, Callable
 import pkg_resources
 
@@ -107,14 +106,14 @@ async def handle(self, rawmsg: RawMessage) -> None:
                     "NOT FOUND IN command_registry: addr={} cmd={} packet={}".format(
                         address,
                         command_value,
-                        ":".join(format(str(x), "02x") for x in data),
+                        ":".join(format(x, "02x") for x in data),
                     )
                 )
         elif self._scan_complete:
             # this should only happen once the scan is complete, of its not complete suspended the error message
             self._log.warning(
                 "UNKNOWN module, you should initialize a full new velbus scan: packet={}, address={}, modules={}".format(
-                    ":".join(format(str(x), "02x") for x in data),
+                    ":".join(format(x, "02x") for x in data),
                     address,
                     self._velbus.get_modules().keys(),
                 )
diff --git a/velbusaio/helpers.py b/velbusaio/helpers.py
index a2ee1b2..031011a 100644
--- a/velbusaio/helpers.py
+++ b/velbusaio/helpers.py
@@ -6,7 +6,7 @@
 
 import os
 import re
-from typing import Any, Dict
+from typing import Any
 
 from velbusaio.const import CACHEDIR
 
diff --git a/velbusaio/message.py b/velbusaio/message.py
index de186d0..188f172 100644
--- a/velbusaio/message.py
+++ b/velbusaio/message.py
@@ -5,7 +5,6 @@
 from __future__ import annotations
 
 import json
-from typing import Optional
 
 from velbusaio.const import PRIORITY_FIRMWARE, PRIORITY_HIGH, PRIORITY_LOW
 
diff --git a/velbusaio/messages/__init__.py b/velbusaio/messages/__init__.py
index d87b310..e69de29 100644
--- a/velbusaio/messages/__init__.py
+++ b/velbusaio/messages/__init__.py
@@ -1,105 +0,0 @@
-"""
-:author: Thomas Delaet <thomas@delaet.org>
-"""
-
-from __future__ import annotations
-
-from velbusaio.messages.blind_status import BlindStatusMessage, BlindStatusNgMessage
-from velbusaio.messages.bus_active import BusActiveMessage
-from velbusaio.messages.bus_error_counter_status import BusErrorCounterStatusMessage
-from velbusaio.messages.bus_error_counter_status_request import (
-    BusErrorStatusRequestMessage,
-)
-from velbusaio.messages.bus_off import BusOffMessage
-from velbusaio.messages.channel_name_part1 import (
-    ChannelNamePart1Message,
-    ChannelNamePart1Message2,
-    ChannelNamePart1Message3,
-)
-from velbusaio.messages.channel_name_part2 import (
-    ChannelNamePart2Message,
-    ChannelNamePart2Message2,
-    ChannelNamePart2Message3,
-)
-from velbusaio.messages.channel_name_part3 import (
-    ChannelNamePart3Message,
-    ChannelNamePart3Message2,
-    ChannelNamePart3Message3,
-)
-from velbusaio.messages.channel_name_request import (
-    ChannelNameRequestMessage,
-    ChannelNameRequestMessage2,
-)
-from velbusaio.messages.clear_led import ClearLedMessage
-from velbusaio.messages.counter_status import CounterStatusMessage
-from velbusaio.messages.counter_status_request import CounterStatusRequestMessage
-from velbusaio.messages.cover_down import CoverDownMessage, CoverDownMessage2
-from velbusaio.messages.cover_off import CoverOffMessage, CoverOffMessage2
-from velbusaio.messages.cover_position import CoverPosMessage
-from velbusaio.messages.cover_up import CoverUpMessage, CoverUpMessage2
-from velbusaio.messages.dali_device_settings import DaliDeviceSettingMsg
-from velbusaio.messages.dimmer_channel_status import DimmerChannelStatusMessage
-from velbusaio.messages.dimmer_status import DimmerStatusMessage
-from velbusaio.messages.fast_blinking_led import FastBlinkingLedMessage
-from velbusaio.messages.forced_off import ForcedOff
-from velbusaio.messages.forced_on import ForcedOn
-from velbusaio.messages.interface_status_request import InterfaceStatusRequestMessage
-from velbusaio.messages.ir_receiver_status import IRReceiverStatusMessage
-from velbusaio.messages.kwh_status import KwhStatusMessage
-from velbusaio.messages.light_value_request import LightValueRequest
-from velbusaio.messages.memo_text import MemoTextMessage
-from velbusaio.messages.memory_data import MemoryDataMessage
-from velbusaio.messages.memory_data_block import MemoryDataBlockMessage
-from velbusaio.messages.memory_dump_request import MemoryDumpRequestMessage
-from velbusaio.messages.raw import MeteoRawMessage, SensorRawMessage
-from velbusaio.messages.module_status import ModuleStatusMessage, ModuleStatusMessage2
-from velbusaio.messages.module_status_request import ModuleStatusRequestMessage
-from velbusaio.messages.module_subtype import ModuleSubTypeMessage
-from velbusaio.messages.module_type import ModuleTypeMessage, ModuleType2Message
-from velbusaio.messages.module_type_request import ModuleTypeRequestMessage
-from velbusaio.messages.push_button_status import PushButtonStatusMessage
-from velbusaio.messages.read_data_block_from_memory import (
-    ReadDataBlockFromMemoryMessage,
-)
-from velbusaio.messages.read_data_from_memory import ReadDataFromMemoryMessage
-from velbusaio.messages.realtime_clock_status_request import RealtimeClockStatusRequest
-from velbusaio.messages.receive_buffer_full import ReceiveBufferFullMessage
-from velbusaio.messages.receive_ready import ReceiveReadyMessage
-from velbusaio.messages.relay_status import RelayStatusMessage
-from velbusaio.messages.restore_dimmer import RestoreDimmerMessage
-from velbusaio.messages.select_program import SelectProgramMessage
-from velbusaio.messages.sensor_temp_request import SensorTempRequest
-from velbusaio.messages.sensor_temperature import SensorTemperatureMessage
-from velbusaio.messages.set_date import SetDate
-from velbusaio.messages.set_daylight_saving import SetDaylightSaving
-from velbusaio.messages.set_dimmer import SetDimmerMessage
-from velbusaio.messages.set_led import SetLedMessage
-from velbusaio.messages.set_realtime_clock import SetRealtimeClock
-from velbusaio.messages.set_temperature import SetTemperatureMessage
-from velbusaio.messages.slider_status import SliderStatusMessage
-from velbusaio.messages.slow_blinking_led import SlowBlinkingLedMessage
-from velbusaio.messages.start_relay_blinking_timer import StartRelayBlinkingTimerMessage
-from velbusaio.messages.start_relay_timer import StartRelayTimerMessage
-from velbusaio.messages.switch_relay_off import SwitchRelayOffMessage
-from velbusaio.messages.switch_relay_on import SwitchRelayOnMessage
-from velbusaio.messages.switch_to_comfort import SwitchToComfortMessage
-from velbusaio.messages.switch_to_day import SwitchToDayMessage
-from velbusaio.messages.switch_to_night import SwitchToNightMessage
-from velbusaio.messages.switch_to_safe import SwitchToSafeMessage
-from velbusaio.messages.temp_sensor_settings_part1 import TempSensorSettingsPart1
-from velbusaio.messages.temp_sensor_settings_part2 import TempSensorSettingsPart2
-from velbusaio.messages.temp_sensor_settings_part3 import TempSensorSettingsPart3
-from velbusaio.messages.temp_sensor_settings_part4 import TempSensorSettingsPart4
-from velbusaio.messages.temp_sensor_settings_request import TempSensorSettingsRequest
-from velbusaio.messages.temp_sensor_status import TempSensorStatusMessage
-from velbusaio.messages.temp_set_cooling import TempSetCoolingMessage
-from velbusaio.messages.temp_set_heating import TempSetHeatingMessage
-from velbusaio.messages.update_led_status import UpdateLedStatusMessage
-from velbusaio.messages.very_fast_blinking_led import VeryFastBlinkingLedMessage
-from velbusaio.messages.write_data_to_memory import WriteDataToMemoryMessage
-from velbusaio.messages.write_memory_block import WriteMemoryBlockMessage
-from velbusaio.messages.write_module_address_and_serial_number import (
-    WriteModuleAddressAndSerialNumberMessage,
-)
-
-# pylint: disable-msg=C0301
diff --git a/velbusaio/messages/cover_off.py b/velbusaio/messages/cover_off.py
index 3a47338..6f27370 100644
--- a/velbusaio/messages/cover_off.py
+++ b/velbusaio/messages/cover_off.py
@@ -4,8 +4,6 @@
 
 from __future__ import annotations
 
-import struct
-
 from velbusaio.command_registry import register
 from velbusaio.message import Message
 
diff --git a/velbusaio/messages/cover_position.py b/velbusaio/messages/cover_position.py
index a8e1fab..7f81549 100644
--- a/velbusaio/messages/cover_position.py
+++ b/velbusaio/messages/cover_position.py
@@ -4,8 +4,6 @@
 
 from __future__ import annotations
 
-import struct
-
 from velbusaio.command_registry import register
 from velbusaio.message import Message
 
diff --git a/velbusaio/module.py b/velbusaio/module.py
index 6cb471f..ebdb90c 100644
--- a/velbusaio/module.py
+++ b/velbusaio/module.py
@@ -5,11 +5,10 @@
 from __future__ import annotations
 
 import logging
-import os
 import pathlib
-import pickle
 import struct
 import sys
+import json
 from typing import Awaitable, Callable
 
 from velbusaio.channels import (
@@ -37,7 +36,7 @@
 )
 from velbusaio.helpers import handle_match, keys_exists
 from velbusaio.message import Message
-from velbusaio.messages import DaliDeviceSettingMsg
+from velbusaio.messages.dali_device_settings import DaliDeviceSettingMsg
 from velbusaio.messages.blind_status import BlindStatusMessage, BlindStatusNgMessage
 from velbusaio.messages.channel_name_part1 import (
     ChannelNamePart1Message,
@@ -81,8 +80,6 @@
     ModuleStatusPirMessage,
 )
 from velbusaio.messages.module_status_request import ModuleStatusRequestMessage
-from velbusaio.messages.module_subtype import ModuleSubTypeMessage
-from velbusaio.messages.module_type import ModuleTypeMessage, ModuleType2Message
 from velbusaio.messages.push_button_status import PushButtonStatusMessage
 from velbusaio.messages.read_data_from_memory import ReadDataFromMemoryMessage
 from velbusaio.messages.relay_status import RelayStatusMessage, RelayStatusMessage2
@@ -188,9 +185,9 @@ def cleanupSubChannels(self) -> None:
                         del self._channels[i]
 
     def _cache(self) -> None:
-        cfile = pathlib.Path(f"{self._cache_dir}/{self._address}.p")
-        with cfile.open("wb") as fl:
-            pickle.dump(self, fl)
+        cfile = pathlib.Path(f"{self._cache_dir}/{self._address}.json")
+        with cfile.open("w") as fl:
+            json.dump(self.to_cache(), fl, indent=4)
 
     def __getstate__(self) -> dict:
         d = self.__dict__
@@ -201,18 +198,17 @@ def __setstate__(self, state: dict) -> None:
         self.__dict__ = state
 
     def __repr__(self) -> str:
-        return "<{}: address:{{{}}} type:{{{}}} loaded:{{{}}} loading:{{{}}} channels{{:{}}}>".format(
-            self._name,
-            self._type,
-            self._address,
-            self.loaded,
-            self._is_loading,
-            self._channels,
-        )
+        return f"<{self._name} type:{self._type} address:{self._address} loaded:{self.loaded} loading:{self._is_loading} channels: {self._channels}>"
 
     def __str__(self) -> str:
         return self.__repr__()
 
+    def to_cache(self) -> dict:
+        d = {"name": self._name, "channels": {}}
+        for num, chan in self._channels.items():
+            d["channels"][num] = chan.to_cache()
+        return d
+
     def get_addresses(self) -> list:
         """
         Get all addresses for this module
@@ -239,12 +235,7 @@ def get_name(self) -> str:
         return self._name
 
     def get_sw_version(self) -> str:
-        return "{}-{}.{}.{}".format(
-            self.serial,
-            self.memory_map_version,
-            self.build_year,
-            self.build_week,
-        )
+        return f"{self.serial}-{self.memory_map_version}.{self.build_year}.{self.build_week}"
 
     def calc_channel_offset(self, address: int) -> int:
         _channel_offset = 0
@@ -547,14 +538,26 @@ async def load(self, from_cache: bool = False) -> None:
         self._log.info("Load Module")
         # start the loading
         self._is_loading = True
+        # see if we have a cache
+        cfile = pathlib.Path(f"{self._cache_dir}/{self._address}.json")
+        with cfile.open("r") as fl:
+            cache = json.load(fl)
         # load default channels
         await self.__load_default_channels()
         # load the data from memory ( the stuff that we need)
-        await self.__load_memory()
+        if "name" in cache and cache["name"] != "":
+            self._name = cache["name"]
+        else:
+            await self.__load_memory()
         # load the module status
         await self._request_module_status()
         # load the channel names
-        await self._request_channel_name()
+        if "channels" in cache:
+            for num, chan in cache["channels"].items():
+                self._channels[int(num)]._name = chan["name"]
+                self._channels[int(num)]._is_loaded = True
+        else:
+            await self._request_channel_name()
         # load the module specific stuff
         self._load()
         # stop the loading
diff --git a/velbusaio/util.py b/velbusaio/util.py
index 6aa1f14..e360ec0 100644
--- a/velbusaio/util.py
+++ b/velbusaio/util.py
@@ -1,3 +1,7 @@
+"""
+Some common utils.
+"""
+
 from typing import Union
 
 from velbusaio.const import MAXIMUM_MESSAGE_SIZE, MINIMUM_MESSAGE_SIZE