diff --git a/firmware/components/presets/src/presets_json_parser.cpp b/firmware/components/presets/src/presets_json_parser.cpp
deleted file mode 100644
index be3c30ed..00000000
--- a/firmware/components/presets/src/presets_json_parser.cpp
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Copyright 2022 Barabas Raffai
- *
- * This file is part of ShrapnelDSP.
- *
- * ShrapnelDSP is free software: you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free
- * Software Foundation, either version 3 of the License, or (at your option)
- * any later version.
- *
- * ShrapnelDSP is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * ShrapnelDSP. If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include "presets_json_parser.h"
-#include "esp_log.h"
-#include "presets.pb-c.h"
-#include "presets_message_type.h"
-#include <cppcodec/base64_rfc4648.hpp>
-#include <etl/map.h>
-#include <uuid.h>
-
-namespace shrapnel::presets {
-
-template <>
-std::optional<ParametersData> from_json(const rapidjson::Value &json)
-{
-    using base64_codec = cppcodec::base64_rfc4648;
-    if(!json.IsString())
-    {
-        return std::nullopt;
-    }
-
-    std::array<uint8_t, 100> buffer{};
-    if(base64_codec::decoded_max_size(json.GetStringLength()) > buffer.size())
-    {
-        return std::nullopt;
-    }
-
-    size_t decoded_size = 0;
-    auto error = base64_codec::decode(buffer.data(),
-                                      buffer.size(),
-                                      json.GetString(),
-                                      json.GetStringLength(),
-                                      decoded_size);
-
-    if(!std::holds_alternative<std::monostate>(error))
-    {
-        return std::nullopt;
-    }
-
-    auto unpacked =
-        preset_parameters__unpack(nullptr, decoded_size, buffer.data());
-    if(unpacked == nullptr)
-    {
-        return std::nullopt;
-    }
-
-    auto out = ParametersData{
-        .amp_gain = unpacked->amp_gain / 1000.f,
-        .amp_channel = unpacked->amp_channel / 1000.f,
-        .bass = unpacked->bass / 1000.f,
-        .middle = unpacked->middle / 1000.f,
-        .treble = unpacked->treble / 1000.f,
-        .contour = unpacked->contour / 1000.f,
-        .volume = unpacked->volume / 1000.f,
-        .noise_gate_threshold = unpacked->noise_gate_threshold / 1000.f,
-        .noise_gate_hysteresis = unpacked->noise_gate_hysteresis / 1000.f,
-        .noise_gate_attack = unpacked->noise_gate_attack / 1000.f,
-        .noise_gate_hold = unpacked->noise_gate_hold / 1000.f,
-        .noise_gate_release = unpacked->noise_gate_release / 1000.f,
-        .noise_gate_bypass = unpacked->noise_gate_bypass / 1000.f,
-        .chorus_rate = unpacked->chorus_rate / 1000.f,
-        .chorus_depth = unpacked->chorus_depth / 1000.f,
-        .chorus_mix = unpacked->chorus_mix / 1000.f,
-        .chorus_bypass = unpacked->chorus_bypass / 1000.f,
-        .wah_position = unpacked->wah_position / 1000.f,
-        .wah_vocal = unpacked->wah_vocal / 1000.f,
-        .wah_bypass = unpacked->wah_bypass / 1000.f,
-    };
-
-    preset_parameters__free_unpacked(unpacked, nullptr);
-    return out;
-}
-
-template <>
-std::optional<PresetData> from_json(const rapidjson::Value &json)
-{
-    auto name = json.FindMember("name");
-    if(name == json.MemberEnd() || !name->value.IsString())
-        return std::nullopt;
-
-    auto parameters_json = json.FindMember("parameters");
-    if(parameters_json == json.MemberEnd())
-        return std::nullopt;
-    auto parameters = from_json<ParametersData>(parameters_json->value);
-    if(!parameters.has_value())
-        return std::nullopt;
-
-    return {{
-        .name{name->value.GetString()},
-        .parameters{*parameters},
-    }};
-}
-
-template <>
-std::optional<Initialise> from_json(const rapidjson::Value &json)
-{
-    return Initialise();
-}
-
-template <>
-std::optional<Create> from_json(const rapidjson::Value &json)
-{
-    auto preset_json = json.FindMember("preset");
-    if(preset_json == json.MemberEnd())
-        return std::nullopt;
-
-    auto preset = from_json<PresetData>(preset_json->value);
-    if(!preset.has_value())
-        return std::nullopt;
-
-    return {{.preset = *preset}};
-}
-
-template <>
-std::optional<Update> from_json(const rapidjson::Value &json)
-{
-    auto id_json = json.FindMember("id");
-    if(id_json == json.MemberEnd())
-        return std::nullopt;
-    if(!id_json->value.IsUint())
-        return std::nullopt;
-
-    auto preset_json = json.FindMember("preset");
-    if(preset_json == json.MemberEnd())
-        return std::nullopt;
-    auto preset = from_json<PresetData>(preset_json->value);
-    if(!preset.has_value())
-        return std::nullopt;
-
-    return {{.id{id_json->value.GetUint()}, .preset = *preset}};
-}
-
-template <>
-std::optional<Delete> from_json(const rapidjson::Value &json)
-{
-    auto id_json = json.FindMember("id");
-    if(id_json == json.MemberEnd())
-        return std::nullopt;
-
-    if(!id_json->value.IsUint())
-        return std::nullopt;
-
-    return {{.id{id_json->value.GetUint()}}};
-}
-
-template <>
-std::optional<PresetsApiMessage> from_json(const rapidjson::Value &json)
-{
-    constexpr char TAG[] = "PresetsApiMessage from_json";
-
-    auto message_type_member = json.FindMember("messageType");
-    if(message_type_member == json.MemberEnd())
-    {
-        ESP_LOGE(TAG, "messageType is missing");
-        goto error;
-    }
-
-    if(!message_type_member->value.IsString())
-    {
-        ESP_LOGE(TAG, "messageType is not string");
-        goto error;
-    }
-
-    {
-        const etl::map<std::string,
-                       std::function<std::optional<PresetsApiMessage>()>,
-                       4>
-            lut{
-                {get_message_type<Initialise>(),
-                 [&] { return from_json<Initialise>(json); }},
-                {get_message_type<Create>(),
-                 [&] { return from_json<Create>(json); }},
-                {get_message_type<Update>(),
-                 [&] { return from_json<Update>(json); }},
-                {get_message_type<Delete>(),
-                 [&] { return from_json<Delete>(json); }},
-            };
-
-        const char *message_type = message_type_member->value.GetString();
-        if(auto f = lut.find(message_type); f != lut.end())
-        {
-            return f->second();
-        }
-    }
-
-error:
-    return std::nullopt;
-}
-
-} // namespace shrapnel::presets
diff --git a/firmware/components/presets/src/presets_message_type.h b/firmware/components/presets/src/presets_message_type.h
deleted file mode 100644
index b5b02fcf..00000000
--- a/firmware/components/presets/src/presets_message_type.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
-* Copyright 2022 Barabas Raffai
-*
-* This file is part of ShrapnelDSP.
-*
-* ShrapnelDSP is free software: you can redistribute it and/or modify it under
-* the terms of the GNU General Public License as published by the Free
-* Software Foundation, either version 3 of the License, or (at your option)
-* any later version.
-*
-* ShrapnelDSP is distributed in the hope that it will be useful, but WITHOUT
-* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-* more details.
-*
-* You should have received a copy of the GNU General Public License along with
-* ShrapnelDSP. If not, see <https://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#include "presets_message_type.h"
-
-namespace shrapnel::presets {
-
-template <typename T>
-constexpr const char *get_message_type();
-
-template <>
-constexpr const char *get_message_type<Initialise>()
-{
-    return "Presets::initialise";
-}
-
-template <>
-constexpr const char *get_message_type<Create>()
-{
-    return "Presets::create";
-}
-
-template <>
-constexpr const char *get_message_type<Notify>()
-{
-    return "Presets::notify";
-}
-
-template <>
-constexpr const char *get_message_type<Update>()
-{
-    return "Presets::update";
-}
-
-template <>
-constexpr const char *get_message_type<Delete>()
-{
-    return "Presets::delete";
-}
-
-} // namespace shrapnel::presets
diff --git a/firmware/components/presets/src/selected_preset_message_type.h b/firmware/components/presets/src/selected_preset_message_type.h
deleted file mode 100644
index 717fa307..00000000
--- a/firmware/components/presets/src/selected_preset_message_type.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
-* Copyright 2022 Barabas Raffai
-*
-* This file is part of ShrapnelDSP.
-*
-* ShrapnelDSP is free software: you can redistribute it and/or modify it under
-* the terms of the GNU General Public License as published by the Free
-* Software Foundation, either version 3 of the License, or (at your option)
-* any later version.
-*
-* ShrapnelDSP is distributed in the hope that it will be useful, but WITHOUT
-* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-* more details.
-*
-* You should have received a copy of the GNU General Public License along with
-* ShrapnelDSP. If not, see <https://www.gnu.org/licenses/>.
-*/
-
-#pragma once
-
-#include "selected_preset_api.h"
-
-namespace shrapnel::selected_preset {
-
-template <typename T>
-constexpr const char *get_message_type();
-
-template <>
-constexpr const char *get_message_type<Read>()
-{
-    return "SelectedPreset::read";
-}
-
-template <>
-constexpr const char *get_message_type<Notify>()
-{
-    return "SelectedPreset::notify";
-}
-
-template <>
-constexpr const char *get_message_type<Write>()
-{
-    return "SelectedPreset::write";
-}
-
-} // namespace shrapnel::selected_preset
diff --git a/frontend/lib/midi_mapping/model/models.dart b/frontend/lib/midi_mapping/model/models.dart
index 64de9300..b2f401dd 100644
--- a/frontend/lib/midi_mapping/model/models.dart
+++ b/frontend/lib/midi_mapping/model/models.dart
@@ -69,22 +69,6 @@ sealed class MidiMapping with _$MidiMapping {
   const MidiMapping._();
 }
 
-/// Midi mapping that is encodable to JSON. Used to communicate between the
-/// firmware and the frontend.
-// TODO remove if not needed any more
-@freezed
-class MidiMappingDto with _$MidiMappingDto {
-  const factory MidiMappingDto({
-    required int midiChannel,
-    required int ccNumber,
-    required String? parameterId,
-    required MidiMappingMode mode,
-    required int? presetId,
-  }) = _MidiMappingDto;
-
-  const MidiMappingDto._();
-}
-
 @freezed
 class MidiMappingEntry with _$MidiMappingEntry {
   const factory MidiMappingEntry({
diff --git a/test/.idea/misc.xml b/test/.idea/misc.xml
index 4c018bce..048657bc 100644
--- a/test/.idea/misc.xml
+++ b/test/.idea/misc.xml
@@ -13,6 +13,7 @@
     </libraryRoots>
     <excludeRoots>
       <file path="$PROJECT_DIR$/../effects/wah/dsp/.venv" />
+      <file path="$PROJECT_DIR$/../firmware/build" />
     </excludeRoots>
   </component>
 </project>
\ No newline at end of file