[FL-2514] Port iButton application to C (#1198)

* Initial C iButton app setup
* Add more scenes
* Add even more scenes
* Add even more scenes again
* More scenes...
* Add key info scene
* Add delete success scene
* Use scene state to store internal data
* Add parameter parsing
* Add emulate scene
* Add write scene
* Add write success scene
* Add Read scene
* Add read success scene
* Add exit confirm scene
* Add retry confirm scene
* Add CRC error scene
* Add not key scene
* Add read key menu scene
* Rename some scenes
* Refactor conditionals
* Remove unneeded custom events
* Remove the old iButton app
* Correct formatting
* Remove rogue comments and function prototypes
* iButton: cleanup merge artifacts and fix warnings

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/ibutton/scenes/ibutton_scene.c

@@ -0,0 +1,30 @@
+#include "ibutton_scene.h"
+
+// Generate scene on_enter handlers array
+#define ADD_SCENE(prefix, name, id) prefix##_scene_##name##_on_enter,
+void (*const ibutton_on_enter_handlers[])(void*) = {
+#include "ibutton_scene_config.h"
+};
+#undef ADD_SCENE
+
+// Generate scene on_event handlers array
+#define ADD_SCENE(prefix, name, id) prefix##_scene_##name##_on_event,
+bool (*const ibutton_on_event_handlers[])(void* context, SceneManagerEvent event) = {
+#include "ibutton_scene_config.h"
+};
+#undef ADD_SCENE
+
+// Generate scene on_exit handlers array
+#define ADD_SCENE(prefix, name, id) prefix##_scene_##name##_on_exit,
+void (*const ibutton_on_exit_handlers[])(void* context) = {
+#include "ibutton_scene_config.h"
+};
+#undef ADD_SCENE
+
+// Initialize scene handlers configuration structure
+const SceneManagerHandlers ibutton_scene_handlers = {
+    .on_enter_handlers = ibutton_on_enter_handlers,
+    .on_event_handlers = ibutton_on_event_handlers,
+    .on_exit_handlers = ibutton_on_exit_handlers,
+    .scene_num = iButtonSceneNum,
+};

applications/ibutton/scenes/ibutton_scene.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <gui/scene_manager.h>
+
+// Generate scene id and total number
+#define ADD_SCENE(prefix, name, id) iButtonScene##id,
+typedef enum {
+#include "ibutton_scene_config.h"
+    iButtonSceneNum,
+} iButtonScene;
+#undef ADD_SCENE
+
+extern const SceneManagerHandlers ibutton_scene_handlers;
+
+// Generate scene on_enter handlers declaration
+#define ADD_SCENE(prefix, name, id) void prefix##_scene_##name##_on_enter(void*);
+#include "ibutton_scene_config.h"
+#undef ADD_SCENE
+
+// Generate scene on_event handlers declaration
+#define ADD_SCENE(prefix, name, id) \
+    bool prefix##_scene_##name##_on_event(void* context, SceneManagerEvent event);
+#include "ibutton_scene_config.h"
+#undef ADD_SCENE
+
+// Generate scene on_exit handlers declaration
+#define ADD_SCENE(prefix, name, id) void prefix##_scene_##name##_on_exit(void* context);
+#include "ibutton_scene_config.h"
+#undef ADD_SCENE

applications/ibutton/scenes/ibutton_scene_add_type.c

@@ -0,0 +1,58 @@
+#include "../ibutton_i.h"
+
+enum SubmenuIndex {
+    SubmenuIndexCyfral,
+    SubmenuIndexDallas,
+    SubmenuIndexMetakom,
+};
+
+void ibutton_scene_add_type_submenu_callback(void* context, uint32_t index) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, index);
+}
+
+void ibutton_scene_add_type_on_enter(void* context) {
+    iButton* ibutton = context;
+    Submenu* submenu = ibutton->submenu;
+
+    submenu_add_item(
+        submenu, "Cyfral", SubmenuIndexCyfral, ibutton_scene_add_type_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu, "Dallas", SubmenuIndexDallas, ibutton_scene_add_type_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu, "Metakom", SubmenuIndexMetakom, ibutton_scene_add_type_submenu_callback, ibutton);
+
+    submenu_set_selected_item(submenu, SubmenuIndexCyfral);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewSubmenu);
+}
+
+bool ibutton_scene_add_type_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    iButtonKey* key = ibutton->key;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == SubmenuIndexCyfral) {
+            ibutton_key_set_type(key, iButtonKeyCyfral);
+        } else if(event.event == SubmenuIndexDallas) {
+            ibutton_key_set_type(key, iButtonKeyDS1990);
+        } else if(event.event == SubmenuIndexMetakom) {
+            ibutton_key_set_type(key, iButtonKeyMetakom);
+        } else {
+            furi_crash("Unknown key type");
+        }
+
+        ibutton_key_set_name(key, "");
+        ibutton_key_clear_data(key);
+        scene_manager_next_scene(ibutton->scene_manager, iButtonSceneAddValue);
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_add_type_on_exit(void* context) {
+    iButton* ibutton = context;
+    submenu_reset(ibutton->submenu);
+}

applications/ibutton/scenes/ibutton_scene_add_value.c

@@ -0,0 +1,57 @@
+#include "../ibutton_i.h"
+
+#include <dolphin/dolphin.h>
+
+void ibutton_scene_add_type_byte_input_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventByteEditResult);
+}
+
+void ibutton_scene_add_value_on_enter(void* context) {
+    iButton* ibutton = context;
+    iButtonKey* key = ibutton->key;
+    uint8_t* new_key_data = malloc(IBUTTON_KEY_DATA_SIZE);
+
+    scene_manager_set_scene_state(
+        ibutton->scene_manager, iButtonSceneAddValue, (uint32_t)new_key_data);
+    memcpy(new_key_data, ibutton_key_get_data_p(key), ibutton_key_get_data_size(key));
+
+    byte_input_set_result_callback(
+        ibutton->byte_input,
+        ibutton_scene_add_type_byte_input_callback,
+        NULL,
+        ibutton,
+        new_key_data,
+        ibutton_key_get_data_size(key));
+
+    byte_input_set_header_text(ibutton->byte_input, "Enter the key");
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewByteInput);
+}
+
+bool ibutton_scene_add_value_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    uint8_t* new_key_data =
+        (uint8_t*)scene_manager_get_scene_state(ibutton->scene_manager, iButtonSceneAddValue);
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventByteEditResult) {
+            ibutton_key_set_data(ibutton->key, new_key_data, IBUTTON_KEY_DATA_SIZE);
+            DOLPHIN_DEED(DolphinDeedIbuttonAdd);
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSaveName);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_add_value_on_exit(void* context) {
+    iButton* ibutton = context;
+    uint8_t* new_key_data =
+        (uint8_t*)scene_manager_get_scene_state(ibutton->scene_manager, iButtonSceneAddValue);
+
+    byte_input_set_result_callback(ibutton->byte_input, NULL, NULL, NULL, NULL, 0);
+    byte_input_set_header_text(ibutton->byte_input, NULL);
+    free(new_key_data);
+}

applications/ibutton/scenes/ibutton_scene_config.h

@@ -0,0 +1,20 @@
+ADD_SCENE(ibutton, start, Start)
+ADD_SCENE(ibutton, emulate, Emulate)
+ADD_SCENE(ibutton, write, Write)
+ADD_SCENE(ibutton, write_success, WriteSuccess)
+ADD_SCENE(ibutton, info, Info)
+ADD_SCENE(ibutton, read, Read)
+ADD_SCENE(ibutton, read_key_menu, ReadKeyMenu)
+ADD_SCENE(ibutton, read_success, ReadSuccess)
+ADD_SCENE(ibutton, read_crc_error, ReadCRCError)
+ADD_SCENE(ibutton, read_not_key_error, ReadNotKeyError)
+ADD_SCENE(ibutton, select_key, SelectKey)
+ADD_SCENE(ibutton, add_type, AddType)
+ADD_SCENE(ibutton, add_value, AddValue)
+ADD_SCENE(ibutton, saved_key_menu, SavedKeyMenu)
+ADD_SCENE(ibutton, save_name, SaveName)
+ADD_SCENE(ibutton, save_success, SaveSuccess)
+ADD_SCENE(ibutton, delete_confirm, DeleteConfirm)
+ADD_SCENE(ibutton, delete_success, DeleteSuccess)
+ADD_SCENE(ibutton, retry_confirm, RetryConfirm)
+ADD_SCENE(ibutton, exit_confirm, ExitConfirm)

applications/ibutton/scenes/ibutton_scene_delete_confirm.c

@@ -0,0 +1,91 @@
+#include "../ibutton_i.h"
+
+static void ibutton_scene_delete_confirm_widget_callback(
+    GuiButtonType result,
+    InputType type,
+    void* context) {
+    iButton* ibutton = context;
+    if(type == InputTypeShort) {
+        view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+    }
+}
+
+void ibutton_scene_delete_confirm_on_enter(void* context) {
+    iButton* ibutton = context;
+    Widget* widget = ibutton->widget;
+    iButtonKey* key = ibutton->key;
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+
+    ibutton_text_store_set(ibutton, "\e#Delete %s?\e#", ibutton_key_get_name_p(key));
+    widget_add_text_box_element(
+        widget, 0, 0, 128, 27, AlignCenter, AlignCenter, ibutton->text_store, false);
+    widget_add_button_element(
+        widget, GuiButtonTypeLeft, "Cancel", ibutton_scene_delete_confirm_widget_callback, ibutton);
+    widget_add_button_element(
+        widget,
+        GuiButtonTypeRight,
+        "Delete",
+        ibutton_scene_delete_confirm_widget_callback,
+        ibutton);
+
+    switch(ibutton_key_get_type(key)) {
+    case iButtonKeyDS1990:
+        ibutton_text_store_set(
+            ibutton,
+            "%02X %02X %02X %02X %02X %02X %02X %02X",
+            key_data[0],
+            key_data[1],
+            key_data[2],
+            key_data[3],
+            key_data[4],
+            key_data[5],
+            key_data[6],
+            key_data[7]);
+        widget_add_string_element(
+            widget, 64, 45, AlignCenter, AlignBottom, FontSecondary, "Dallas");
+        break;
+
+    case iButtonKeyCyfral:
+        ibutton_text_store_set(ibutton, "%02X %02X", key_data[0], key_data[1]);
+        widget_add_string_element(
+            widget, 64, 45, AlignCenter, AlignBottom, FontSecondary, "Cyfral");
+        break;
+
+    case iButtonKeyMetakom:
+        ibutton_text_store_set(
+            ibutton, "%02X %02X %02X %02X", key_data[0], key_data[1], key_data[2], key_data[3]);
+        widget_add_string_element(
+            widget, 64, 45, AlignCenter, AlignBottom, FontSecondary, "Metakom");
+        break;
+    }
+    widget_add_string_element(
+        widget, 64, 33, AlignCenter, AlignBottom, FontSecondary, ibutton->text_store);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewWidget);
+}
+
+bool ibutton_scene_delete_confirm_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == GuiButtonTypeRight) {
+            if(ibutton_delete_key(ibutton)) {
+                scene_manager_next_scene(scene_manager, iButtonSceneDeleteSuccess);
+            }
+            //TODO: What if the key could not be deleted?
+        } else if(event.event == GuiButtonTypeLeft) {
+            scene_manager_previous_scene(scene_manager);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_delete_confirm_on_exit(void* context) {
+    iButton* ibutton = context;
+    ibutton_text_store_clear(ibutton);
+    widget_reset(ibutton->widget);
+}

applications/ibutton/scenes/ibutton_scene_delete_success.c

@@ -0,0 +1,48 @@
+#include "../ibutton_i.h"
+
+static void ibutton_scene_delete_success_popup_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventBack);
+}
+
+void ibutton_scene_delete_success_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+
+    popup_set_icon(popup, 0, 2, &I_DolphinMafia_115x62);
+    popup_set_header(popup, "Deleted", 83, 19, AlignLeft, AlignBottom);
+
+    popup_set_callback(popup, ibutton_scene_delete_success_popup_callback);
+    popup_set_context(popup, ibutton);
+    popup_set_timeout(popup, 1500);
+    popup_enable_timeout(popup);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+}
+
+bool ibutton_scene_delete_success_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventBack) {
+            scene_manager_search_and_switch_to_previous_scene(
+                ibutton->scene_manager, iButtonSceneSelectKey);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_delete_success_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+
+    popup_disable_timeout(popup);
+    popup_set_context(popup, NULL);
+    popup_set_callback(popup, NULL);
+}

applications/ibutton/scenes/ibutton_scene_emulate.c

@@ -0,0 +1,106 @@
+#include "../ibutton_i.h"
+#include <dolphin/dolphin.h>
+
+static void ibutton_scene_emulate_callback(void* context, bool emulated) {
+    iButton* ibutton = context;
+    if(emulated) {
+        view_dispatcher_send_custom_event(
+            ibutton->view_dispatcher, iButtonCustomEventWorkerEmulated);
+    }
+}
+
+void ibutton_scene_emulate_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    iButtonKey* key = ibutton->key;
+
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+    const char* key_name = ibutton_key_get_name_p(key);
+
+    uint8_t line_count = 2;
+    DOLPHIN_DEED(DolphinDeedIbuttonEmulate);
+
+    // check that stored key has name
+    if(strcmp(key_name, "") != 0) {
+        ibutton_text_store_set(ibutton, "emulating\n%s", key_name);
+        line_count = 2;
+    } else {
+        // if not, show key data
+        switch(ibutton_key_get_type(key)) {
+        case iButtonKeyDS1990:
+            ibutton_text_store_set(
+                ibutton,
+                "emulating\n%02X %02X %02X %02X\n%02X %02X %02X %02X",
+                key_data[0],
+                key_data[1],
+                key_data[2],
+                key_data[3],
+                key_data[4],
+                key_data[5],
+                key_data[6],
+                key_data[7]);
+            line_count = 3;
+            break;
+        case iButtonKeyCyfral:
+            ibutton_text_store_set(ibutton, "emulating\n%02X %02X", key_data[0], key_data[1]);
+            line_count = 2;
+            break;
+        case iButtonKeyMetakom:
+            ibutton_text_store_set(
+                ibutton,
+                "emulating\n%02X %02X %02X %02X",
+                key_data[0],
+                key_data[1],
+                key_data[2],
+                key_data[3]);
+            line_count = 2;
+            break;
+        }
+    }
+
+    switch(line_count) {
+    case 3:
+        popup_set_header(popup, "iButton", 82, 18, AlignCenter, AlignBottom);
+        popup_set_text(popup, ibutton->text_store, 82, 22, AlignCenter, AlignTop);
+        break;
+
+    default:
+        popup_set_header(popup, "iButton", 82, 24, AlignCenter, AlignBottom);
+        popup_set_text(popup, ibutton->text_store, 82, 28, AlignCenter, AlignTop);
+        break;
+    }
+
+    popup_set_icon(popup, 2, 10, &I_iButtonKey_49x44);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+
+    ibutton_worker_emulate_set_callback(
+        ibutton->key_worker, ibutton_scene_emulate_callback, ibutton);
+    ibutton_worker_emulate_start(ibutton->key_worker, key);
+}
+
+bool ibutton_scene_emulate_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeTick) {
+        consumed = true;
+        ibutton_notification_message(ibutton, iButtonNotificationMessageEmulate);
+    } else if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventWorkerEmulated) {
+            ibutton_notification_message(ibutton, iButtonNotificationMessageYellowBlink);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_emulate_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    ibutton_worker_stop(ibutton->key_worker);
+    popup_set_header(popup, NULL, 0, 0, AlignCenter, AlignBottom);
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+}

applications/ibutton/scenes/ibutton_scene_exit_confirm.c

@@ -0,0 +1,51 @@
+#include "../ibutton_i.h"
+
+static void ibutton_scene_exit_confirm_widget_callback(
+    GuiButtonType result,
+    InputType type,
+    void* context) {
+    iButton* ibutton = context;
+    if(type == InputTypeShort) {
+        view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+    }
+}
+
+void ibutton_scene_exit_confirm_on_enter(void* context) {
+    iButton* ibutton = context;
+    Widget* widget = ibutton->widget;
+
+    widget_add_button_element(
+        widget, GuiButtonTypeLeft, "Exit", ibutton_scene_exit_confirm_widget_callback, ibutton);
+    widget_add_button_element(
+        widget, GuiButtonTypeRight, "Stay", ibutton_scene_exit_confirm_widget_callback, ibutton);
+    widget_add_string_element(
+        widget, 64, 19, AlignCenter, AlignBottom, FontPrimary, "Exit to iButton menu");
+    widget_add_string_element(
+        widget, 64, 29, AlignCenter, AlignBottom, FontSecondary, "All unsaved data will be lost");
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewWidget);
+}
+
+bool ibutton_scene_exit_confirm_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeBack) {
+        consumed = true; // Ignore Back button presses
+    } else if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == GuiButtonTypeLeft) {
+            scene_manager_search_and_switch_to_previous_scene(scene_manager, iButtonSceneStart);
+        } else if(event.event == GuiButtonTypeRight) {
+            scene_manager_previous_scene(scene_manager);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_exit_confirm_on_exit(void* context) {
+    iButton* ibutton = context;
+    widget_reset(ibutton->widget);
+}

applications/ibutton/scenes/ibutton_scene_info.c

@@ -0,0 +1,61 @@
+#include "../ibutton_i.h"
+
+void ibutton_scene_info_on_enter(void* context) {
+    iButton* ibutton = context;
+    Widget* widget = ibutton->widget;
+    iButtonKey* key = ibutton->key;
+
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+
+    ibutton_text_store_set(ibutton, "%s", ibutton_key_get_name_p(key));
+    widget_add_text_box_element(
+        widget, 0, 0, 128, 28, AlignCenter, AlignCenter, ibutton->text_store, false);
+
+    switch(ibutton_key_get_type(key)) {
+    case iButtonKeyDS1990:
+        ibutton_text_store_set(
+            ibutton,
+            "%02X %02X %02X %02X %02X %02X %02X %02X",
+            key_data[0],
+            key_data[1],
+            key_data[2],
+            key_data[3],
+            key_data[4],
+            key_data[5],
+            key_data[6],
+            key_data[7]);
+        widget_add_string_element(
+            widget, 64, 51, AlignCenter, AlignBottom, FontSecondary, "Dallas");
+        break;
+
+    case iButtonKeyMetakom:
+        ibutton_text_store_set(
+            ibutton, "%02X %02X %02X %02X", key_data[0], key_data[1], key_data[2], key_data[3]);
+        widget_add_string_element(
+            widget, 64, 51, AlignCenter, AlignBottom, FontSecondary, "Metakom");
+        break;
+
+    case iButtonKeyCyfral:
+        ibutton_text_store_set(ibutton, "%02X %02X", key_data[0], key_data[1]);
+        widget_add_string_element(
+            widget, 64, 51, AlignCenter, AlignBottom, FontSecondary, "Cyfral");
+        break;
+    }
+
+    widget_add_string_element(
+        widget, 64, 35, AlignCenter, AlignBottom, FontPrimary, ibutton->text_store);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewWidget);
+}
+
+bool ibutton_scene_info_on_event(void* context, SceneManagerEvent event) {
+    UNUSED(context);
+    UNUSED(event);
+    return false;
+}
+
+void ibutton_scene_info_on_exit(void* context) {
+    iButton* ibutton = context;
+    ibutton_text_store_clear(ibutton);
+    widget_reset(ibutton->widget);
+}

applications/ibutton/scenes/ibutton_scene_read.c

@@ -0,0 +1,72 @@
+#include "../ibutton_i.h"
+#include <dolphin/dolphin.h>
+
+static void ibutton_scene_read_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventWorkerRead);
+}
+
+void ibutton_scene_read_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    iButtonKey* key = ibutton->key;
+    iButtonWorker* worker = ibutton->key_worker;
+    DOLPHIN_DEED(DolphinDeedIbuttonRead);
+
+    popup_set_header(popup, "iButton", 95, 26, AlignCenter, AlignBottom);
+    popup_set_text(popup, "waiting\nfor key ...", 95, 30, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 5, &I_DolphinWait_61x59);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+    ibutton_key_set_name(key, "");
+
+    ibutton_worker_read_set_callback(worker, ibutton_scene_read_callback, ibutton);
+    ibutton_worker_read_start(worker, key);
+}
+
+bool ibutton_scene_read_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeTick) {
+        consumed = true;
+        ibutton_notification_message(ibutton, iButtonNotificationMessageRead);
+    } else if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventWorkerRead) {
+            bool success = false;
+            iButtonKey* key = ibutton->key;
+
+            if(ibutton_key_get_type(key) == iButtonKeyDS1990) {
+                if(!ibutton_key_dallas_crc_is_valid(key)) {
+                    scene_manager_next_scene(scene_manager, iButtonSceneReadCRCError);
+                } else if(!ibutton_key_dallas_is_1990_key(key)) {
+                    scene_manager_next_scene(scene_manager, iButtonSceneReadNotKeyError);
+                } else {
+                    success = true;
+                }
+            } else {
+                success = true;
+            }
+
+            if(success) {
+                ibutton_notification_message(ibutton, iButtonNotificationMessageSuccess);
+                ibutton_notification_message(ibutton, iButtonNotificationMessageGreenOn);
+                DOLPHIN_DEED(DolphinDeedIbuttonReadSuccess);
+                scene_manager_next_scene(scene_manager, iButtonSceneReadSuccess);
+            }
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_read_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    ibutton_worker_stop(ibutton->key_worker);
+    popup_set_header(popup, NULL, 0, 0, AlignCenter, AlignBottom);
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+}

applications/ibutton/scenes/ibutton_scene_read_crc_error.c

@@ -0,0 +1,71 @@
+#include "../ibutton_i.h"
+#include <one_wire/maxim_crc.h>
+
+static void ibutton_scene_read_crc_error_dialog_ex_callback(DialogExResult result, void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+}
+
+void ibutton_scene_read_crc_error_on_enter(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+    iButtonKey* key = ibutton->key;
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+
+    ibutton_text_store_set(
+        ibutton,
+        "%02X %02X %02X %02X %02X %02X %02X %02X\nExpected CRC: %X",
+        key_data[0],
+        key_data[1],
+        key_data[2],
+        key_data[3],
+        key_data[4],
+        key_data[5],
+        key_data[6],
+        key_data[7],
+        maxim_crc8(key_data, 7, MAXIM_CRC8_INIT));
+
+    dialog_ex_set_header(dialog_ex, "CRC ERROR", 64, 10, AlignCenter, AlignCenter);
+    dialog_ex_set_text(dialog_ex, ibutton->text_store, 64, 19, AlignCenter, AlignTop);
+    dialog_ex_set_left_button_text(dialog_ex, "Retry");
+    dialog_ex_set_right_button_text(dialog_ex, "More");
+    dialog_ex_set_result_callback(dialog_ex, ibutton_scene_read_crc_error_dialog_ex_callback);
+    dialog_ex_set_context(dialog_ex, ibutton);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewDialogEx);
+
+    ibutton_notification_message(ibutton, iButtonNotificationMessageError);
+    ibutton_notification_message(ibutton, iButtonNotificationMessageRedOn);
+}
+
+bool ibutton_scene_read_crc_error_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == DialogExResultRight) {
+            scene_manager_next_scene(scene_manager, iButtonSceneReadKeyMenu);
+        } else if(event.event == DialogExResultLeft) {
+            scene_manager_previous_scene(scene_manager);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_read_crc_error_on_exit(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+
+    ibutton_text_store_clear(ibutton);
+
+    dialog_ex_set_header(dialog_ex, NULL, 0, 0, AlignCenter, AlignCenter);
+    dialog_ex_set_text(dialog_ex, NULL, 0, 0, AlignCenter, AlignTop);
+    dialog_ex_set_left_button_text(dialog_ex, NULL);
+    dialog_ex_set_result_callback(dialog_ex, NULL);
+    dialog_ex_set_context(dialog_ex, NULL);
+
+    ibutton_notification_message(ibutton, iButtonNotificationMessageRedOff);
+}

applications/ibutton/scenes/ibutton_scene_read_key_menu.c

@@ -0,0 +1,61 @@
+#include "../ibutton_i.h"
+
+typedef enum {
+    SubmenuIndexSave,
+    SubmenuIndexEmulate,
+    SubmenuIndexWrite,
+} SubmenuIndex;
+
+void ibutton_scene_read_key_menu_submenu_callback(void* context, uint32_t index) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, index);
+}
+
+void ibutton_scene_read_key_menu_on_enter(void* context) {
+    iButton* ibutton = context;
+    Submenu* submenu = ibutton->submenu;
+
+    submenu_add_item(
+        submenu, "Save", SubmenuIndexSave, ibutton_scene_read_key_menu_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu,
+        "Emulate",
+        SubmenuIndexEmulate,
+        ibutton_scene_read_key_menu_submenu_callback,
+        ibutton);
+    if(ibutton_key_get_type(ibutton->key) == iButtonKeyDS1990) {
+        submenu_add_item(
+            submenu,
+            "Write",
+            SubmenuIndexWrite,
+            ibutton_scene_read_key_menu_submenu_callback,
+            ibutton);
+    }
+
+    submenu_set_selected_item(submenu, SubmenuIndexSave);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewSubmenu);
+}
+
+bool ibutton_scene_read_key_menu_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == SubmenuIndexSave) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSaveName);
+        } else if(event.event == SubmenuIndexEmulate) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneEmulate);
+        } else if(event.event == SubmenuIndexWrite) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneWrite);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_read_key_menu_on_exit(void* context) {
+    iButton* ibutton = context;
+    submenu_reset(ibutton->submenu);
+}

applications/ibutton/scenes/ibutton_scene_read_not_key_error.c

@@ -0,0 +1,72 @@
+#include "../ibutton_i.h"
+#include <one_wire/maxim_crc.h>
+
+static void
+    ibutton_scene_read_not_key_error_dialog_ex_callback(DialogExResult result, void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+}
+
+void ibutton_scene_read_not_key_error_on_enter(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+    iButtonKey* key = ibutton->key;
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+
+    ibutton_text_store_set(
+        ibutton,
+        "THIS IS NOT A KEY\n%02X %02X %02X %02X %02X %02X %02X %02X",
+        key_data[0],
+        key_data[1],
+        key_data[2],
+        key_data[3],
+        key_data[4],
+        key_data[5],
+        key_data[6],
+        key_data[7],
+        maxim_crc8(key_data, 7, MAXIM_CRC8_INIT));
+
+    dialog_ex_set_header(dialog_ex, "CRC ERROR", 64, 10, AlignCenter, AlignCenter);
+    dialog_ex_set_text(dialog_ex, ibutton->text_store, 64, 19, AlignCenter, AlignTop);
+    dialog_ex_set_left_button_text(dialog_ex, "Retry");
+    dialog_ex_set_right_button_text(dialog_ex, "More");
+    dialog_ex_set_result_callback(dialog_ex, ibutton_scene_read_not_key_error_dialog_ex_callback);
+    dialog_ex_set_context(dialog_ex, ibutton);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewDialogEx);
+
+    ibutton_notification_message(ibutton, iButtonNotificationMessageError);
+    ibutton_notification_message(ibutton, iButtonNotificationMessageRedOn);
+}
+
+bool ibutton_scene_read_not_key_error_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == DialogExResultRight) {
+            scene_manager_next_scene(scene_manager, iButtonSceneReadKeyMenu);
+        } else if(event.event == DialogExResultLeft) {
+            scene_manager_previous_scene(scene_manager);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_read_not_key_error_on_exit(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+
+    ibutton_text_store_clear(ibutton);
+
+    dialog_ex_set_header(dialog_ex, NULL, 0, 0, AlignCenter, AlignCenter);
+    dialog_ex_set_text(dialog_ex, NULL, 0, 0, AlignCenter, AlignTop);
+    dialog_ex_set_left_button_text(dialog_ex, NULL);
+    dialog_ex_set_result_callback(dialog_ex, NULL);
+    dialog_ex_set_context(dialog_ex, NULL);
+
+    ibutton_notification_message(ibutton, iButtonNotificationMessageRedOff);
+}

applications/ibutton/scenes/ibutton_scene_read_success.c

@@ -0,0 +1,87 @@
+#include "../ibutton_i.h"
+#include <dolphin/dolphin.h>
+
+static void ibutton_scene_read_success_dialog_ex_callback(DialogExResult result, void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+}
+
+void ibutton_scene_read_success_on_enter(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+    iButtonKey* key = ibutton->key;
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+
+    switch(ibutton_key_get_type(key)) {
+    case iButtonKeyDS1990:
+        ibutton_text_store_set(
+            ibutton,
+            "Dallas\n%02X %02X %02X %02X\n%02X %02X %02X %02X",
+            key_data[0],
+            key_data[1],
+            key_data[2],
+            key_data[3],
+            key_data[4],
+            key_data[5],
+            key_data[6],
+            key_data[7]);
+        break;
+    case iButtonKeyCyfral:
+        ibutton_text_store_set(ibutton, "Cyfral\n%02X %02X", key_data[0], key_data[1]);
+        break;
+    case iButtonKeyMetakom:
+        ibutton_text_store_set(
+            ibutton,
+            "Metakom\n%02X %02X %02X %02X",
+            key_data[0],
+            key_data[1],
+            key_data[2],
+            key_data[3]);
+        break;
+    }
+
+    dialog_ex_set_text(dialog_ex, ibutton->text_store, 95, 30, AlignCenter, AlignCenter);
+    dialog_ex_set_left_button_text(dialog_ex, "Retry");
+    dialog_ex_set_right_button_text(dialog_ex, "More");
+    dialog_ex_set_icon(dialog_ex, 0, 1, &I_DolphinReadingSuccess_59x63);
+    dialog_ex_set_result_callback(dialog_ex, ibutton_scene_read_success_dialog_ex_callback);
+    dialog_ex_set_context(dialog_ex, ibutton);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewDialogEx);
+}
+
+bool ibutton_scene_read_success_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeBack) {
+        consumed = true;
+        scene_manager_next_scene(scene_manager, iButtonSceneExitConfirm);
+    } else if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == DialogExResultRight) {
+            scene_manager_next_scene(scene_manager, iButtonSceneReadKeyMenu);
+        } else if(event.event == DialogExResultLeft) {
+            scene_manager_next_scene(scene_manager, iButtonSceneRetryConfirm);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_read_success_on_exit(void* context) {
+    iButton* ibutton = context;
+    DialogEx* dialog_ex = ibutton->dialog_ex;
+
+    ibutton_text_store_clear(ibutton);
+
+    dialog_ex_set_text(dialog_ex, NULL, 0, 0, AlignCenter, AlignTop);
+    dialog_ex_set_left_button_text(dialog_ex, NULL);
+    dialog_ex_set_right_button_text(dialog_ex, NULL);
+    dialog_ex_set_result_callback(dialog_ex, NULL);
+    dialog_ex_set_context(dialog_ex, NULL);
+    dialog_ex_set_icon(dialog_ex, 0, 0, NULL);
+
+    ibutton_notification_message(ibutton, iButtonNotificationMessageGreenOff);
+}

applications/ibutton/scenes/ibutton_scene_retry_confirm.c

@@ -0,0 +1,51 @@
+#include "../ibutton_i.h"
+
+static void ibutton_scene_retry_confirm_widget_callback(
+    GuiButtonType result,
+    InputType type,
+    void* context) {
+    iButton* ibutton = context;
+    if(type == InputTypeShort) {
+        view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+    }
+}
+
+void ibutton_scene_retry_confirm_on_enter(void* context) {
+    iButton* ibutton = context;
+    Widget* widget = ibutton->widget;
+
+    widget_add_button_element(
+        widget, GuiButtonTypeLeft, "Exit", ibutton_scene_retry_confirm_widget_callback, ibutton);
+    widget_add_button_element(
+        widget, GuiButtonTypeRight, "Stay", ibutton_scene_retry_confirm_widget_callback, ibutton);
+    widget_add_string_element(
+        widget, 64, 19, AlignCenter, AlignBottom, FontPrimary, "Return to reading?");
+    widget_add_string_element(
+        widget, 64, 29, AlignCenter, AlignBottom, FontSecondary, "All unsaved data will be lost");
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewWidget);
+}
+
+bool ibutton_scene_retry_confirm_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeBack) {
+        consumed = true; // Ignore Back button presses
+    } else if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == GuiButtonTypeLeft) {
+            scene_manager_search_and_switch_to_previous_scene(scene_manager, iButtonSceneRead);
+        } else if(event.event == GuiButtonTypeRight) {
+            scene_manager_previous_scene(scene_manager);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_retry_confirm_on_exit(void* context) {
+    iButton* ibutton = context;
+    widget_reset(ibutton->widget);
+}

applications/ibutton/scenes/ibutton_scene_save_name.c

@@ -0,0 +1,68 @@
+#include "../ibutton_i.h"
+#include <lib/toolbox/random_name.h>
+
+static void ibutton_scene_save_name_text_input_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventTextEditResult);
+}
+
+void ibutton_scene_save_name_on_enter(void* context) {
+    iButton* ibutton = context;
+    TextInput* text_input = ibutton->text_input;
+
+    const char* key_name = ibutton_key_get_name_p(ibutton->key);
+    const bool key_name_is_empty = !strcmp(key_name, "");
+
+    if(key_name_is_empty) {
+        set_random_name(ibutton->text_store, IBUTTON_TEXT_STORE_SIZE);
+    } else {
+        ibutton_text_store_set(ibutton, "%s", key_name);
+    }
+
+    text_input_set_header_text(text_input, "Name the key");
+    text_input_set_result_callback(
+        text_input,
+        ibutton_scene_save_name_text_input_callback,
+        ibutton,
+        ibutton->text_store,
+        IBUTTON_KEY_NAME_SIZE,
+        key_name_is_empty);
+
+    ValidatorIsFile* validator_is_file =
+        validator_is_file_alloc_init(IBUTTON_APP_FOLDER, IBUTTON_APP_EXTENSION, key_name);
+    text_input_set_validator(text_input, validator_is_file_callback, validator_is_file);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewTextInput);
+}
+
+bool ibutton_scene_save_name_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventTextEditResult) {
+            if(ibutton_save_key(ibutton, ibutton->text_store)) {
+                scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSaveSuccess);
+            } else {
+                const uint32_t possible_scenes[] = {
+                    iButtonSceneReadKeyMenu, iButtonSceneSavedKeyMenu, iButtonSceneAddType};
+                ibutton_switch_to_previous_scene_one_of(
+                    ibutton, possible_scenes, sizeof(possible_scenes) / sizeof(uint32_t));
+            }
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_save_name_on_exit(void* context) {
+    iButton* ibutton = context;
+    TextInput* text_input = ibutton->text_input;
+
+    void* validator_context = text_input_get_validator_callback_context(text_input);
+    text_input_set_validator(text_input, NULL, NULL);
+    validator_is_file_free((ValidatorIsFile*)validator_context);
+
+    text_input_reset(text_input);
+}

applications/ibutton/scenes/ibutton_scene_save_success.c

@@ -0,0 +1,52 @@
+#include "../ibutton_i.h"
+#include <dolphin/dolphin.h>
+
+static void ibutton_scene_save_success_popup_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventBack);
+}
+
+void ibutton_scene_save_success_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    DOLPHIN_DEED(DolphinDeedIbuttonSave);
+
+    popup_set_icon(popup, 32, 5, &I_DolphinNice_96x59);
+    popup_set_header(popup, "Saved!", 5, 7, AlignLeft, AlignTop);
+
+    popup_set_callback(popup, ibutton_scene_save_success_popup_callback);
+    popup_set_context(popup, ibutton);
+    popup_set_timeout(popup, 1500);
+    popup_enable_timeout(popup);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+}
+
+bool ibutton_scene_save_success_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventBack) {
+            const uint32_t possible_scenes[] = {
+                iButtonSceneReadKeyMenu, iButtonSceneSavedKeyMenu, iButtonSceneAddType};
+            ibutton_switch_to_previous_scene_one_of(
+                ibutton, possible_scenes, sizeof(possible_scenes) / sizeof(uint32_t));
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_save_success_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+
+    popup_disable_timeout(popup);
+    popup_set_context(popup, NULL);
+    popup_set_callback(popup, NULL);
+}

applications/ibutton/scenes/ibutton_scene_saved_key_menu.c

@@ -0,0 +1,75 @@
+#include "../ibutton_i.h"
+
+enum SubmenuIndex {
+    SubmenuIndexEmulate,
+    SubmenuIndexWrite,
+    SubmenuIndexEdit,
+    SubmenuIndexDelete,
+    SubmenuIndexInfo,
+};
+
+void ibutton_scene_saved_key_menu_submenu_callback(void* context, uint32_t index) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, index);
+}
+
+void ibutton_scene_saved_key_menu_on_enter(void* context) {
+    iButton* ibutton = context;
+    Submenu* submenu = ibutton->submenu;
+
+    submenu_add_item(
+        submenu,
+        "Emulate",
+        SubmenuIndexEmulate,
+        ibutton_scene_saved_key_menu_submenu_callback,
+        ibutton);
+    if(ibutton_key_get_type(ibutton->key) == iButtonKeyDS1990) {
+        submenu_add_item(
+            submenu,
+            "Write",
+            SubmenuIndexWrite,
+            ibutton_scene_saved_key_menu_submenu_callback,
+            ibutton);
+    }
+    submenu_add_item(
+        submenu, "Edit", SubmenuIndexEdit, ibutton_scene_saved_key_menu_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu,
+        "Delete",
+        SubmenuIndexDelete,
+        ibutton_scene_saved_key_menu_submenu_callback,
+        ibutton);
+    submenu_add_item(
+        submenu, "Info", SubmenuIndexInfo, ibutton_scene_saved_key_menu_submenu_callback, ibutton);
+
+    submenu_set_selected_item(submenu, SubmenuIndexEmulate);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewSubmenu);
+}
+
+bool ibutton_scene_saved_key_menu_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == SubmenuIndexEmulate) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneEmulate);
+        } else if(event.event == SubmenuIndexWrite) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneWrite);
+        } else if(event.event == SubmenuIndexEdit) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneAddValue);
+        } else if(event.event == SubmenuIndexDelete) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneDeleteConfirm);
+        } else if(event.event == SubmenuIndexInfo) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneInfo);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_saved_key_menu_on_exit(void* context) {
+    iButton* ibutton = context;
+    submenu_reset(ibutton->submenu);
+}

applications/ibutton/scenes/ibutton_scene_select_key.c

@@ -0,0 +1,22 @@
+#include "../ibutton_i.h"
+
+void ibutton_scene_select_key_on_enter(void* context) {
+    iButton* ibutton = context;
+
+    if(!ibutton_file_select(ibutton)) {
+        scene_manager_search_and_switch_to_previous_scene(
+            ibutton->scene_manager, iButtonSceneStart);
+    } else {
+        scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSavedKeyMenu);
+    }
+}
+
+bool ibutton_scene_select_key_on_event(void* context, SceneManagerEvent event) {
+    UNUSED(context);
+    UNUSED(event);
+    return false;
+}
+
+void ibutton_scene_select_key_on_exit(void* context) {
+    UNUSED(context);
+}

applications/ibutton/scenes/ibutton_scene_start.c

@@ -0,0 +1,51 @@
+#include "../ibutton_i.h"
+
+enum SubmenuIndex {
+    SubmenuIndexRead,
+    SubmenuIndexSaved,
+    SubmenuIndexAdd,
+};
+
+void ibutton_scene_start_submenu_callback(void* context, uint32_t index) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, index);
+}
+
+void ibutton_scene_start_on_enter(void* context) {
+    iButton* ibutton = context;
+    Submenu* submenu = ibutton->submenu;
+
+    submenu_add_item(
+        submenu, "Read", SubmenuIndexRead, ibutton_scene_start_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu, "Saved", SubmenuIndexSaved, ibutton_scene_start_submenu_callback, ibutton);
+    submenu_add_item(
+        submenu, "Add Manually", SubmenuIndexAdd, ibutton_scene_start_submenu_callback, ibutton);
+
+    submenu_set_selected_item(submenu, SubmenuIndexRead);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewSubmenu);
+}
+
+bool ibutton_scene_start_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == SubmenuIndexRead) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneRead);
+        } else if(event.event == SubmenuIndexSaved) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSelectKey);
+        } else if(event.event == SubmenuIndexAdd) {
+            scene_manager_next_scene(ibutton->scene_manager, iButtonSceneAddType);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_start_on_exit(void* context) {
+    iButton* ibutton = context;
+    submenu_reset(ibutton->submenu);
+}

applications/ibutton/scenes/ibutton_scene_write.c

@@ -0,0 +1,121 @@
+#include "../ibutton_i.h"
+
+typedef enum {
+    iButtonSceneWriteStateDefault,
+    iButtonSceneWriteStateBlinkYellow,
+} iButtonSceneWriteState;
+
+static void ibutton_scene_write_callback(void* context, iButtonWorkerWriteResult result) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, result);
+}
+
+void ibutton_scene_write_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    iButtonKey* key = ibutton->key;
+    iButtonWorker* worker = ibutton->key_worker;
+
+    const uint8_t* key_data = ibutton_key_get_data_p(key);
+    const char* key_name = ibutton_key_get_name_p(key);
+
+    uint8_t line_count = 2;
+
+    // check that stored key has name
+    if(strcmp(key_name, "") != 0) {
+        ibutton_text_store_set(ibutton, "writing\n%s", key_name);
+        line_count = 2;
+    } else {
+        // if not, show key data
+        switch(ibutton_key_get_type(key)) {
+        case iButtonKeyDS1990:
+            ibutton_text_store_set(
+                ibutton,
+                "writing\n%02X %02X %02X %02X\n%02X %02X %02X %02X",
+                key_data[0],
+                key_data[1],
+                key_data[2],
+                key_data[3],
+                key_data[4],
+                key_data[5],
+                key_data[6],
+                key_data[7]);
+            line_count = 3;
+            break;
+        case iButtonKeyCyfral:
+            ibutton_text_store_set(ibutton, "writing\n%02X %02X", key_data[0], key_data[1]);
+            line_count = 2;
+            break;
+        case iButtonKeyMetakom:
+            ibutton_text_store_set(
+                ibutton,
+                "writing\n%02X %02X %02X %02X",
+                key_data[0],
+                key_data[1],
+                key_data[2],
+                key_data[3]);
+            line_count = 2;
+            break;
+        }
+    }
+
+    switch(line_count) {
+    case 3:
+        popup_set_header(popup, "iButton", 82, 18, AlignCenter, AlignBottom);
+        popup_set_text(popup, ibutton->text_store, 82, 22, AlignCenter, AlignTop);
+        break;
+
+    default:
+        popup_set_header(popup, "iButton", 82, 24, AlignCenter, AlignBottom);
+        popup_set_text(popup, ibutton->text_store, 82, 28, AlignCenter, AlignTop);
+        break;
+    }
+
+    popup_set_icon(popup, 2, 10, &I_iButtonKey_49x44);
+
+    scene_manager_set_scene_state(
+        ibutton->scene_manager, iButtonSceneWrite, iButtonSceneWriteStateDefault);
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+
+    ibutton_worker_write_set_callback(worker, ibutton_scene_write_callback, ibutton);
+    ibutton_worker_write_start(worker, key);
+}
+
+bool ibutton_scene_write_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    SceneManager* scene_manager = ibutton->scene_manager;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if((event.event == iButtonWorkerWriteOK) || (event.event == iButtonWorkerWriteSameKey)) {
+            scene_manager_next_scene(scene_manager, iButtonSceneWriteSuccess);
+        } else if(event.event == iButtonWorkerWriteNoDetect) {
+            scene_manager_set_scene_state(
+                scene_manager, iButtonSceneWrite, iButtonSceneWriteStateDefault);
+        } else if(event.event == iButtonWorkerWriteCannotWrite) {
+            scene_manager_set_scene_state(
+                scene_manager, iButtonSceneWrite, iButtonSceneWriteStateBlinkYellow);
+        }
+
+    } else if(event.type == SceneManagerEventTypeTick) {
+        consumed = true;
+        if(scene_manager_get_scene_state(scene_manager, iButtonSceneWrite) ==
+           iButtonSceneWriteStateBlinkYellow) {
+            ibutton_notification_message(ibutton, iButtonNotificationMessageYellowBlink);
+        } else {
+            ibutton_notification_message(ibutton, iButtonNotificationMessageEmulate);
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_write_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+    ibutton_worker_stop(ibutton->key_worker);
+    popup_set_header(popup, NULL, 0, 0, AlignCenter, AlignBottom);
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+}

applications/ibutton/scenes/ibutton_scene_write_success.c

@@ -0,0 +1,52 @@
+#include "../ibutton_i.h"
+
+static void ibutton_scene_write_success_popup_callback(void* context) {
+    iButton* ibutton = context;
+    view_dispatcher_send_custom_event(ibutton->view_dispatcher, iButtonCustomEventBack);
+    ibutton_notification_message(ibutton, iButtonNotificationMessageGreenOff);
+}
+
+void ibutton_scene_write_success_on_enter(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+
+    popup_set_icon(popup, 0, 12, &I_iButtonDolphinVerySuccess_108x52);
+    popup_set_text(popup, "Successfully written!", 40, 12, AlignLeft, AlignBottom);
+
+    popup_set_callback(popup, ibutton_scene_write_success_popup_callback);
+    popup_set_context(popup, ibutton);
+    popup_set_timeout(popup, 1500);
+    popup_enable_timeout(popup);
+
+    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewPopup);
+    ibutton_notification_message(ibutton, iButtonNotificationMessageSuccess);
+    ibutton_notification_message(ibutton, iButtonNotificationMessageGreenOn);
+}
+
+bool ibutton_scene_write_success_on_event(void* context, SceneManagerEvent event) {
+    iButton* ibutton = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        consumed = true;
+        if(event.event == iButtonCustomEventBack) {
+            const uint32_t possible_scenes[] = {iButtonSceneReadKeyMenu, iButtonSceneStart};
+            ibutton_switch_to_previous_scene_one_of(
+                ibutton, possible_scenes, sizeof(possible_scenes) / sizeof(uint32_t));
+        }
+    }
+
+    return consumed;
+}
+
+void ibutton_scene_write_success_on_exit(void* context) {
+    iButton* ibutton = context;
+    Popup* popup = ibutton->popup;
+
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+
+    popup_disable_timeout(popup);
+    popup_set_context(popup, NULL);
+    popup_set_callback(popup, NULL);
+}