move firmware into subfolder

Signed-off-by: Peter Siegmund <mars3142@users.noreply.github.com>

firmware/.clang-format

@@ -0,0 +1,2 @@
+---
+BasedOnStyle: Microsoft

firmware/.clangd

@@ -0,0 +1,17 @@
+CompileFlags:
+    Add: 
+        - -Wno-unknown-warning-option
+        - -Wno-format
+    Remove: 
+        - -mword-relocations
+
+Diagnostics:
+    ClangTidy:
+        FastCheckFilter: None
+
+---
+
+If:
+    PathMatch: .*\.h
+Diagnostics:
+    UnusedIncludes: None

firmware/.gitignore

@@ -0,0 +1,9 @@
+build/**
+managed_components/**
+sdkconfig
+sdkconfig.old
+.vscode/settings.json
+.espidf.*.json
+*.svd
+*.lock
+build-release/

firmware/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(lighthouses)

firmware/CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+- Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+warnemuende.lighthouses@mars3142.org.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

firmware/LICENSE.md

@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2025 Peter Siegmund
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

firmware/Makefile

@@ -0,0 +1,2 @@
+release:
+	idf.py -B build-release -DSDKCONFIG_DEFAULTS="sdkconfig.defaults;sdkconfig.release" fullclean build

firmware/README.md

@@ -0,0 +1,6 @@
+| Supported Targets | ESP32 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S3 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- |
+
+# Warnemuende Lighthouse
+
+You can find more about it on [my wiki](https://wiki.mars3142.dev/project/maerklin/warnemuende/lighthouse/start).

firmware/components/light/CMakeLists.txt

@@ -0,0 +1,8 @@
+idf_component_register(SRCS 
+                        "beacon.c"
+                        "light.c"
+                        "outdoor.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        esp_driver_gptimer
+)

firmware/components/light/beacon.c

@@ -0,0 +1,155 @@
+#include "beacon.h"
+
+#include "driver/gptimer.h"
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "led_strip.h"
+#include "light.h"
+#include "sdkconfig.h"
+#include "semaphore.h"
+
+static const char *TAG = "beacon";
+
+static SemaphoreHandle_t timer_semaphore;
+gptimer_handle_t gptimer = NULL;
+
+static const uint32_t value = 200;
+
+static bool IRAM_ATTR beacon_timer_callback(gptimer_handle_t timer, const gptimer_alarm_event_data_t *edata,
+                                            void *userCtx)
+{
+    BaseType_t high_task_wakeup = pdFALSE;
+    xSemaphoreGiveFromISR(timer_semaphore, &high_task_wakeup);
+    if (high_task_wakeup)
+    {
+        portYIELD_FROM_ISR();
+    }
+    return true;
+}
+
+static void beacon_timer_event_task(void *arg)
+{
+    while (true)
+    {
+        if (xSemaphoreTake(timer_semaphore, portMAX_DELAY))
+        {
+            LedMatrix_t led_matrix = get_led_matrix();
+
+            static bool level = false;
+            level = !level;
+            if (led_matrix.led_strip)
+            {
+                for (uint32_t i = 0; i < led_matrix.size; i++)
+                {
+                    led_strip_set_pixel(led_matrix.led_strip, i, 0, (level) ? value : 0, 0);
+                }
+                led_strip_refresh(led_matrix.led_strip);
+            }
+            ESP_LOGD(TAG, "Timer Event, LED now %s", level ? "ON" : "OFF");
+        }
+    }
+}
+
+esp_err_t beacon_start(void)
+{
+    if (gptimer == NULL)
+    {
+        ESP_LOGE(TAG, "GPTimer not initialized");
+        return ESP_ERR_INVALID_STATE;
+    }
+    esp_err_t ret = gptimer_start(gptimer);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to start gptimer: %s", esp_err_to_name(ret));
+    }
+    else
+    {
+        ESP_LOGI(TAG, "GPTimer started.");
+    }
+    return ret;
+}
+
+esp_err_t beacon_stop(void)
+{
+    if (gptimer == NULL)
+    {
+        ESP_LOGE(TAG, "GPTimer not initialized");
+        return ESP_ERR_INVALID_STATE;
+    }
+    esp_err_t ret = gptimer_stop(gptimer);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to stop gptimer: %s", esp_err_to_name(ret));
+    }
+    else
+    {
+        ESP_LOGI(TAG, "GPTimer stopped.");
+    }
+    return ret;
+}
+
+esp_err_t beacon_init(void)
+{
+    esp_err_t ret = ESP_OK;
+
+    timer_semaphore = xSemaphoreCreateBinary();
+
+    gptimer_config_t timer_config = {
+        .clk_src = GPTIMER_CLK_SRC_DEFAULT, .direction = GPTIMER_COUNT_UP, .resolution_hz = 1000000};
+    ret = gptimer_new_timer(&timer_config, &gptimer);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to create new gptimer: %s", esp_err_to_name(ret));
+        goto exit;
+    }
+
+    gptimer_event_callbacks_t callbacks = {.on_alarm = beacon_timer_callback};
+    ret = gptimer_register_event_callbacks(gptimer, &callbacks, NULL);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to register timer callbacks: %s", esp_err_to_name(ret));
+        goto cleanupTimer;
+    }
+
+    ret = gptimer_enable(gptimer);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to enable gptimer: %s", esp_err_to_name(ret));
+        goto cleanupTimer;
+    }
+
+    gptimer_alarm_config_t alarm_config = {
+        .alarm_count = 2000000, .reload_count = 0, .flags.auto_reload_on_alarm = true};
+    ret = gptimer_set_alarm_action(gptimer, &alarm_config);
+    if (ret != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to set gptimer alarm action: %s", esp_err_to_name(ret));
+        goto cleanupEnabledTimer;
+    }
+
+    BaseType_t task_created = xTaskCreate(beacon_timer_event_task, "beacon_timer_event_task", 4096, NULL, 10, NULL);
+    if (task_created != pdPASS)
+    {
+        ESP_LOGE(TAG, "Failed to create timer event task");
+        ret = ESP_ERR_NO_MEM;
+        goto cleanupEnabledTimer;
+    }
+
+    ESP_LOGI(TAG, "Beacon module initialized.");
+    goto exit;
+
+cleanupEnabledTimer:
+    if (gptimer)
+    {
+        gptimer_disable(gptimer);
+    }
+cleanupTimer:
+    if (gptimer)
+    {
+        gptimer_del_timer(gptimer);
+        gptimer = NULL;
+    }
+exit:
+    return ret;
+}

firmware/components/light/idf_component.yml

@@ -0,0 +1,17 @@
+## IDF Component Manager Manifest File
+dependencies:
+  ## Required IDF version
+  idf:
+    version: '>=5.4.0'
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true
+  espressif/led_strip: '~3.0.0'

firmware/components/light/include/beacon.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include "esp_err.h"
+
+/**
+ * @brief Initializes the beacon module.
+ *
+ * This function sets up the beacon module, configuring it for subsequent operations
+ * such as starting or stopping the broadcast functionality.
+ *
+ * @return
+ *     - ESP_OK: Initialization completed successfully.
+ *     - Error codes in case of failure, indicating the specific issue.
+ */
+esp_err_t beacon_init(void);
+
+/**
+ * @brief Starts the beacon functionality for broadcasting signals.
+ *
+ * This function initiates the process required for starting the beacon.
+ * It ensures the beacon is prepared to transmit signals effectively.
+ *
+ * @return
+ *     - ESP_OK: Beacon started successfully.
+ *     - Error codes in case of failure, indicating the specific issue.
+ */
+esp_err_t beacon_start(void);
+
+/**
+ * @brief Stops the beacon broadcasting functionality.
+ *
+ * This function terminates the ongoing broadcasting process of the beacon
+ * and releases any resources allocated during the operation.
+ *
+ * @return
+ *     - ESP_OK: Broadcasting stopped successfully.
+ *     - Error codes in case of failure, indicating the specific issue.
+ */
+esp_err_t beacon_stop(void);

firmware/components/light/include/light.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "beacon.h"
+#include "led_strip.h"
+#include "outdoor.h"
+
+#include "esp_err.h"
+
+typedef struct
+{
+    led_strip_handle_t led_strip;
+    uint32_t size;
+} LedMatrix_t;
+
+LedMatrix_t get_led_matrix(void);
+
+/**
+ * @brief Initializes the WLED module.
+ *
+ * This function configures the WLED module for operation, preparing it for subsequent
+ * usage such as enabling lighting effects or communication.
+ *
+ * @return
+ *     - ESP_OK: Initialization completed successfully.
+ *     - Error codes in case of failure, indicating the specific issue.
+ */
+esp_err_t wled_init(void);

firmware/components/light/include/outdoor.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "esp_err.h"
+
+esp_err_t outdoor_init(void);
+
+esp_err_t outdoor_start(void);
+
+esp_err_t outdoor_stop(void);

firmware/components/light/light.c

@@ -0,0 +1,38 @@
+#include "light.h"
+
+#include "sdkconfig.h"
+
+static LedMatrix_t led_matrix = {.size = 1};
+
+LedMatrix_t get_led_matrix(void)
+{
+    return led_matrix;
+}
+
+esp_err_t wled_init(void)
+{
+    led_strip_config_t strip_config = {.strip_gpio_num = CONFIG_WLED_DIN_PIN,
+                                       .max_leds = led_matrix.size,
+                                       .led_model = LED_MODEL_WS2812,
+                                       .color_component_format = LED_STRIP_COLOR_COMPONENT_FMT_GRB,
+                                       .flags = {
+                                           .invert_out = false,
+                                       }};
+
+    led_strip_rmt_config_t rmt_config = {.clk_src = RMT_CLK_SRC_DEFAULT,
+                                         .resolution_hz = 0,
+                                         .mem_block_symbols = 0,
+                                         .flags = {
+                                             .with_dma = CONFIG_WLED_DMA_USAGE,
+                                         }};
+
+    ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_config, &led_matrix.led_strip));
+
+    for (uint32_t i = 0; i < led_matrix.size; i++)
+    {
+        led_strip_set_pixel(led_matrix.led_strip, i, 0, 0, 0);
+    }
+    led_strip_refresh(led_matrix.led_strip);
+
+    return ESP_OK;
+}

firmware/components/light/outdoor.c

@@ -0,0 +1,16 @@
+#include "outdoor.h"
+
+esp_err_t outdoor_init(void)
+{
+    return ESP_OK;
+}
+
+esp_err_t outdoor_start(void)
+{
+    return ESP_OK;
+}
+
+esp_err_t outdoor_stop(void)
+{
+    return ESP_OK;
+}

firmware/components/persistence/CMakeLists.txt

@@ -0,0 +1,5 @@
+idf_component_register(SRCS "persistence.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        nvs_flash
+)

firmware/components/persistence/include/persistence.h

@@ -0,0 +1,12 @@
+#pragma once
+
+typedef enum
+{
+    VALUE_TYPE_STRING,
+    VALUE_TYPE_INT32,
+} persistence_value_type_t;
+
+void persistence_init(const char *namespace_name);
+void persistence_save(persistence_value_type_t value_type, const char *key, const void *value);
+void *persistence_load(persistence_value_type_t value_type, const char *key, void *out);
+void persistence_deinit();

firmware/components/persistence/persistence.c

@@ -0,0 +1,114 @@
+#include "persistence.h"
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp_mac.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "nvs_flash.h"
+
+static const char *TAG = "persistence";
+
+static nvs_handle_t persistence_handle;
+static SemaphoreHandle_t persistence_mutex;
+
+void persistence_init(const char *namespace_name)
+{
+    esp_err_t ret = nvs_flash_init();
+    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND)
+    {
+        ESP_ERROR_CHECK(nvs_flash_erase());
+        ret = nvs_flash_init();
+    }
+    ESP_ERROR_CHECK(ret);
+
+    ESP_ERROR_CHECK(nvs_open(namespace_name, NVS_READWRITE, &persistence_handle));
+
+    persistence_mutex = xSemaphoreCreateMutex();
+    if (persistence_mutex == NULL)
+    {
+        ESP_LOGE(TAG, "Failed to create mutex");
+    }
+}
+
+void persistence_save(persistence_value_type_t value_type, const char *key, const void *value)
+{
+    if (persistence_mutex != NULL)
+    {
+        if (xSemaphoreTake(persistence_mutex, portMAX_DELAY) == pdTRUE)
+        {
+            esp_err_t err = ESP_ERR_INVALID_ARG;
+
+            switch (value_type)
+            {
+            case VALUE_TYPE_STRING:
+                err = nvs_set_str(persistence_handle, key, (char *)value);
+                break;
+
+            case VALUE_TYPE_INT32:
+                err = nvs_set_i32(persistence_handle, key, *(int32_t *)value);
+                break;
+
+            default:
+                ESP_LOGE(TAG, "Unsupported value type");
+                break;
+            }
+
+            if (err == ESP_OK)
+            {
+                ESP_ERROR_CHECK(nvs_commit(persistence_handle));
+            }
+            else
+            {
+                ESP_LOGE(TAG, "Error saving key %s: %s", key, esp_err_to_name(err));
+            }
+
+            xSemaphoreGive(persistence_mutex);
+        }
+    }
+}
+
+void *persistence_load(persistence_value_type_t value_type, const char *key, void *out)
+{
+    if (persistence_mutex != NULL)
+    {
+        if (xSemaphoreTake(persistence_mutex, portMAX_DELAY) == pdTRUE)
+        {
+            esp_err_t err = ESP_ERR_INVALID_ARG;
+
+            switch (value_type)
+            {
+            case VALUE_TYPE_STRING:
+                err = nvs_get_str(persistence_handle, key, (char *)out, NULL);
+                break;
+
+            case VALUE_TYPE_INT32:
+                err = nvs_get_i32(persistence_handle, key, (int32_t *)out);
+                break;
+
+            default:
+                ESP_LOGE(TAG, "Unsupported value type");
+                break;
+            }
+
+            if (err != ESP_OK)
+            {
+                ESP_LOGE(TAG, "Error loading key %s: %s", key, esp_err_to_name(err));
+            }
+
+            xSemaphoreGive(persistence_mutex);
+        }
+    }
+
+    return out;
+}
+
+void persistence_deinit()
+{
+    if (persistence_mutex != NULL)
+    {
+        vSemaphoreDelete(persistence_mutex);
+        persistence_mutex = NULL;
+    }
+
+    nvs_close(persistence_handle);
+}

firmware/components/remote_control/CMakeLists.txt

@@ -0,0 +1,11 @@
+idf_component_register(SRCS 
+                        "capability_service.c"
+                        "device_service.c"
+                        "led_service.c"
+                        "remote_control.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        bt
+                        esp_app_format
+                        storage
+)

firmware/components/remote_control/capability_service.c

@@ -0,0 +1,156 @@
+#include "capability_service.h"
+#include "esp_log.h"
+#include "storage.h"
+#include <string.h>
+#include <stdlib.h>           // For malloc, free
+#include "host/ble_hs.h"      // For ble_hs_mbuf_from_flat, ble_att_mtu
+#include "host/ble_uuid.h"    // For BLE_ATT_MTU_DFLT (often included via ble_hs.h)
+#include "nimble/nimble_port.h" // For os_mbuf related functions
+
+static const char *TAG_CS = "capability_service";
+
+#define CAPA_READ_CHUNK_SIZE 200 // Maximale Bytes pro Lesevorgang aus dem Storage
+
+int capa_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    esp_err_t storage_status = storage_init();
+    if (storage_status != ESP_OK)
+    {
+        ESP_LOGE(TAG_CS, "Failed to initialize storage: %s", esp_err_to_name(storage_status));
+        const char *err_msg = "Error: Storage init failed";
+        os_mbuf_append(ctxt->om, err_msg, strlen(err_msg));
+        // storage_uninit() sollte hier nicht aufgerufen werden, da die Initialisierung fehlschlug.
+        return 0;
+    }
+
+    char *content = "";
+    os_mbuf_append(ctxt->om, content, strlen(content));
+    const char *filename = "/storage/capability.json"; // Die zu lesende Datei
+    char read_buffer[CAPA_READ_CHUNK_SIZE];
+    ssize_t bytes_read;
+    int os_err;
+
+    ESP_LOGI(TAG_CS, "Reading capabilities from %s", filename);
+
+    // Schleife, um die Datei in Chunks zu lesen und an den mbuf anzuhängen
+    while ((bytes_read = storage_read(filename, read_buffer, sizeof(read_buffer))) > 0)
+    {
+        ESP_LOGD(TAG_CS, "Read %zd bytes from storage", bytes_read);
+        // Den gelesenen Chunk an den BLE-Antwortpuffer anhängen
+        os_err = os_mbuf_append(ctxt->om, read_buffer, bytes_read);
+        if (os_err != 0)
+        {
+            ESP_LOGE(TAG_CS, "Failed to append to mbuf (error %d). May be out of space.", os_err);
+            // Der mbuf könnte voll sein. Stoppe das Anhängen.
+            // Bereits angehängte Daten werden gesendet.
+            break;
+        }
+    }
+
+    // Fehlerbehandlung oder EOF
+    if (bytes_read < 0)
+    {
+        ESP_LOGE(TAG_CS, "Error reading from storage (file: %s, error_code: %zd)", filename, bytes_read);
+        // Wenn noch nichts angehängt wurde, sende eine Fehlermeldung.
+        if (ctxt->om->om_len == 0)
+        {
+            const char *err_msg = "Error: Failed to read capability data";
+            // Hier könnten spezifischere Fehlermeldungen basierend auf bytes_read eingefügt werden
+            os_mbuf_append(ctxt->om, err_msg, strlen(err_msg));
+        }
+    }
+    else
+    { // bytes_read == 0, bedeutet EOF (Ende der Datei)
+        ESP_LOGI(TAG_CS, "Successfully read and appended all data from %s to mbuf.", filename);
+    }
+
+    storage_uninit();
+    return 0;
+}
+
+int capa_char_1979_user_desc(uint16_t con_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    const char *desc = "Capabilities of the device";
+    os_mbuf_append(ctxt->om, desc, strlen(desc));
+    return 0;
+}
+
+void capa_notify_data(uint16_t conn_handle, uint16_t char_val_handle)
+{
+    esp_err_t storage_status = storage_init();
+    if (storage_status != ESP_OK)
+    {
+        ESP_LOGE(TAG_CS, "Notify: Failed to initialize storage: %s", esp_err_to_name(storage_status));
+        return;
+    }
+
+    const char *filename = "/storage/capability.json";
+
+    uint16_t mtu = ble_att_mtu(conn_handle);
+    if (mtu == 0) { // Should not happen for an active connection, fallback
+        ESP_LOGW(TAG_CS, "Notify: ble_att_mtu returned 0, using default MTU %d.", BLE_ATT_MTU_DFLT);
+        mtu = BLE_ATT_MTU_DFLT;
+    }
+
+    // Max payload for notification is MTU - 3 (1 byte opcode for Notification, 2 bytes attribute handle)
+    size_t notify_chunk_size = (mtu > 3) ? (mtu - 3) : (BLE_ATT_MTU_DFLT - 3); // Ensure mtu > 3
+
+    // Further cap by CAPA_READ_CHUNK_SIZE if it's smaller and meant as an upper limit for any single read op
+    if (notify_chunk_size > CAPA_READ_CHUNK_SIZE) {
+        notify_chunk_size = CAPA_READ_CHUNK_SIZE;
+    }
+
+    if (notify_chunk_size == 0) { // Safety check
+        ESP_LOGE(TAG_CS, "Notify: Calculated notify_chunk_size is 0. Aborting.");
+        storage_uninit();
+        return;
+    }
+
+    char *read_buffer = malloc(notify_chunk_size);
+    if (!read_buffer)
+    {
+        ESP_LOGE(TAG_CS, "Notify: Failed to allocate read_buffer (%zu bytes)", notify_chunk_size);
+        storage_uninit();
+        return;
+    }
+
+    ESP_LOGI(TAG_CS, "Notify: Reading capabilities from %s to notify conn %u, attr %u (chunk size %zu, MTU %u)",
+             filename, conn_handle, char_val_handle, notify_chunk_size, mtu);
+
+    FILE *fp = fopen(filename, "r");
+    if (!fp)
+    {
+        ESP_LOGE(TAG_CS, "Notify: Failed to open %s for reading.", filename);
+        free(read_buffer);
+        storage_uninit();
+        return;
+    }
+
+    ssize_t bytes_read;
+    while ((bytes_read = fread(read_buffer, 1, notify_chunk_size, fp)) > 0)
+    {
+        ESP_LOGD(TAG_CS, "Notify: Read %zd bytes from storage for notification", bytes_read);
+
+        struct os_mbuf *om = ble_hs_mbuf_from_flat(read_buffer, bytes_read);
+        if (!om) {
+            ESP_LOGE(TAG_CS, "Notify: Failed to allocate mbuf for notification. Stopping.");
+            break; // Stop sending if mbuf allocation fails
+        }
+
+        int rc = ble_gatts_notify_custom(conn_handle, char_val_handle, om);
+        if (rc != 0) {
+            ESP_LOGE(TAG_CS, "Notify: Error sending notification (rc=%d). Stopping.", rc);
+            // ble_gatts_notify_custom frees 'om' on success or if it takes ownership even on some errors.
+            // If it returns an error where 'om' is not freed, we might need os_mbuf_free_chain(om);
+            // For now, assume NimBLE handles 'om' correctly in error cases like BLE_HS_ENOMEM.
+            break; // Stop if notification fails
+        }
+        ESP_LOGD(TAG_CS, "Notify: Sent %zd bytes successfully.", bytes_read);
+    }
+
+    if (ferror(fp)) { ESP_LOGE(TAG_CS, "Notify: File read error from %s.", filename); }
+    fclose(fp);
+    free(read_buffer);
+    storage_uninit();
+    ESP_LOGI(TAG_CS, "Notify: Finished sending capability data for conn %u.", conn_handle);
+}

firmware/components/remote_control/device_service.c

@@ -0,0 +1,29 @@
+#include "include/device_service.h"
+#include "esp_app_desc.h"
+#include <stdio.h>
+#include <string.h>
+
+int device_model_number_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    char model_number_str[65];
+    const esp_app_desc_t *app_desc = esp_app_get_description();
+
+    if (app_desc->project_name[0] != '\0' && app_desc->version[0] != '\0')
+    {
+        snprintf(model_number_str, sizeof(model_number_str), "%s v%s", app_desc->project_name, app_desc->version);
+    }
+    else
+    {
+        snprintf(model_number_str, sizeof(model_number_str), "undefined");
+    }
+
+    os_mbuf_append(ctxt->om, model_number_str, strlen(model_number_str));
+    return 0;
+}
+
+int device_manufacturer_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    char *manufacturer = "mars3142";
+    os_mbuf_append(ctxt->om, manufacturer, strlen(manufacturer));
+    return 0;
+}

firmware/components/remote_control/include/capability_service.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "host/ble_hs.h"
+#include <stdio.h>
+
+/// Service Characteristics Callback
+int capa_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
+void capa_notify_data(uint16_t conn_handle, uint16_t char_val_handle);
+
+/// Service Characteristics User Description
+int capa_char_1979_user_desc(uint16_t con_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);

firmware/components/remote_control/include/device_service.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "host/ble_hs.h"
+#include <stdio.h>
+
+int device_model_number_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
+int device_manufacturer_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);

firmware/components/remote_control/include/led_service.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "host/ble_hs.h"
+#include <stdio.h>
+
+/// LED Service Characteristic Callbacks
+int led_write(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
+int led_capabilities_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
+
+/// LED Service Characteristic User Description
+int led_char_a000_user_desc(uint16_t con_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);
+int led_char_dead_user_desc(uint16_t con_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg);

firmware/components/remote_control/include/remote_control.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void remote_control_init(void);

firmware/components/remote_control/led_service.c

@@ -0,0 +1,75 @@
+#include "include/led_service.h"
+
+static const char *TAG = "led_service";
+
+/// Capabilities of Device
+int led_capabilities_read(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    char *data = "To be implemented later";
+    os_mbuf_append(ctxt->om, data, strlen(data));
+    return 0;
+}
+
+// Write data to ESP32 defined as server
+int led_write(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    const char *received_payload = (const char *)ctxt->om->om_data;
+    uint16_t payload_len = ctxt->om->om_len;
+
+    // Define command strings
+    const char CMD_LIGHT_ON[] = "LIGHT ON";
+    const char CMD_LIGHT_OFF[] = "LIGHT OFF";
+    const char CMD_FAN_ON[] = "FAN ON";
+    const char CMD_FAN_OFF[] = "FAN OFF";
+
+    if (payload_len == (sizeof(CMD_LIGHT_ON) - 1) && strncmp(received_payload, CMD_LIGHT_ON, payload_len) == 0)
+    {
+        ESP_LOGI(TAG, "LIGHT ON");
+        // for (int i = 0; i < led_matrix_get_size(); i++)
+        {
+            // led_matrix_set_pixel(i, 10, 10, 0);
+        }
+    }
+    else if (payload_len == (sizeof(CMD_LIGHT_OFF) - 1) && strncmp(received_payload, CMD_LIGHT_OFF, payload_len) == 0)
+    {
+        ESP_LOGI(TAG, "LIGHT OFF");
+        // for (int i = 0; i < led_matrix_get_size(); i++)
+        {
+            // led_matrix_set_pixel(i, 0, 0, 0);
+        }
+    }
+    else if (payload_len == (sizeof(CMD_FAN_ON) - 1) && strncmp(received_payload, CMD_FAN_ON, payload_len) == 0)
+    {
+        ESP_LOGI(TAG, "FAN ON");
+        // TODO: Implement action for FAN ON
+    }
+    else if (payload_len == (sizeof(CMD_FAN_OFF) - 1) && strncmp(received_payload, CMD_FAN_OFF, payload_len) == 0)
+    {
+        ESP_LOGI(TAG, "FAN OFF");
+        // TODO: Implement action for FAN OFF
+    }
+    else
+    {
+        char temp_buffer[payload_len + 1];
+        memcpy(temp_buffer, received_payload, payload_len);
+        temp_buffer[payload_len] = '\0';
+
+        ESP_LOGI(TAG, "Unknown command from client: %s", temp_buffer);
+    }
+
+    return 0;
+}
+
+int led_char_a000_user_desc(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    const char *desc = "Capabilities of Device";
+    os_mbuf_append(ctxt->om, desc, strlen(desc));
+    return 0;
+}
+
+int led_char_dead_user_desc(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt *ctxt, void *arg)
+{
+    const char *desc = "Readable Data from Server";
+    os_mbuf_append(ctxt->om, desc, strlen(desc));
+    return 0;
+}

firmware/components/remote_control/remote_control.c

@@ -0,0 +1,251 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "capability_service.h"
+#include "esp_event.h"
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "host/ble_hs.h"
+#include "host/ble_sm.h"
+#include "host/ble_uuid.h"
+#include "include/device_service.h"
+#include "include/led_service.h"
+#include "nimble/nimble_port.h"
+#include "nimble/nimble_port_freertos.h"
+#include "sdkconfig.h"
+#include "services/gap/ble_svc_gap.h"
+#include "services/gatt/ble_svc_gatt.h"
+
+static const char *TAG = "remote_control";
+
+static const ble_uuid16_t device_service_uuid = BLE_UUID16_INIT(0x180A);
+static const ble_uuid128_t capability_service_uuid =
+    BLE_UUID128_INIT(0x91, 0xB6, 0xCA, 0x95, 0xB2, 0xC6, 0x7B, 0x90, 0x31, 0x45, 0x77, 0xE6, 0x67, 0x10, 0x68, 0xB9);
+static const ble_uuid16_t led_service_uuid = BLE_UUID16_INIT(0x1007);
+
+uint8_t ble_addr_type;
+
+// Handle for the capability characteristic value
+static uint16_t g_capa_char_val_handle;
+
+static void ble_app_advertise(void);
+
+static struct ble_gatt_dsc_def char_0xA000_descs[] = {{
+                                                          .uuid = BLE_UUID16_DECLARE(0x2901),
+                                                          .att_flags = BLE_ATT_F_READ,
+                                                          .access_cb = led_char_a000_user_desc,
+                                                      },
+                                                      {0}};
+
+static struct ble_gatt_dsc_def char_0xDEAD_descs[] = {{
+                                                          .uuid = BLE_UUID16_DECLARE(0x2901),
+                                                          .att_flags = BLE_ATT_F_WRITE,
+                                                          .access_cb = led_char_dead_user_desc,
+                                                      },
+                                                      {0}};
+
+static struct ble_gatt_dsc_def char_0x1979_desc[] = {{
+                                                         .uuid = BLE_UUID16_DECLARE(0x2901),
+                                                         .att_flags = BLE_ATT_F_READ,
+                                                         .access_cb = capa_char_1979_user_desc,
+                                                     },
+                                                     {0}};
+
+// Array of pointers to other service definitions
+static const struct ble_gatt_svc_def gatt_svcs[] = {
+    {
+        .type = BLE_GATT_SVC_TYPE_PRIMARY,
+        .uuid = &device_service_uuid.u,
+        .characteristics = (struct ble_gatt_chr_def[]){{.uuid = BLE_UUID16_DECLARE(0x2A24),
+                                                        .flags = BLE_GATT_CHR_F_READ,
+                                                        .access_cb = device_model_number_read},
+                                                       {.uuid = BLE_UUID16_DECLARE(0x2A29),
+                                                        .flags = BLE_GATT_CHR_F_READ,
+                                                        .access_cb = device_manufacturer_read},
+                                                       {0}},
+    },
+    {
+        .type = BLE_GATT_SVC_TYPE_PRIMARY,
+        .uuid = &capability_service_uuid.u,
+        .characteristics = (struct ble_gatt_chr_def[]){{
+                                                           .uuid = BLE_UUID16_DECLARE(0x1979),
+                                                           .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                                                           .access_cb = capa_read,
+                                                           .val_handle = &g_capa_char_val_handle,
+                                                           .descriptors = char_0x1979_desc,
+                                                       },
+                                                       {0}},
+    },
+    {
+        .type = BLE_GATT_SVC_TYPE_PRIMARY,
+        .uuid = &led_service_uuid.u,
+        .characteristics = (struct ble_gatt_chr_def[]){{
+                                                           .uuid = BLE_UUID16_DECLARE(0xA000),
+                                                           .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_NOTIFY,
+                                                           .access_cb = led_capabilities_read,
+                                                           .descriptors = char_0xA000_descs,
+                                                       },
+                                                       {
+                                                           .uuid = BLE_UUID16_DECLARE(0xDEAD),
+                                                           .flags = BLE_GATT_CHR_F_WRITE,
+                                                           .access_cb = led_write,
+                                                           .descriptors = char_0xDEAD_descs,
+                                                       },
+                                                       {0}},
+    },
+    {0}};
+
+// BLE event handling
+static int ble_gap_event(struct ble_gap_event *event, void *arg)
+{
+    switch (event->type)
+    {
+    case BLE_GAP_EVENT_CONNECT:
+        ESP_LOGI(TAG, "BLE GAP EVENT CONNECT %s", event->connect.status == 0 ? "OK!" : "FAILED!");
+        if (event->connect.status != 0)
+        {
+            // Re-advertise if connection failed
+            ble_app_advertise();
+        }
+        break;
+
+    case BLE_GAP_EVENT_DISCONNECT:
+        ESP_LOGI(TAG, "BLE GAP EVENT DISCONNECTED");
+        // Re-advertise after disconnection
+        ble_app_advertise();
+        break;
+
+    case BLE_GAP_EVENT_ADV_COMPLETE:
+        ESP_LOGI(TAG, "BLE GAP EVENT ADV COMPLETE");
+        // Re-advertise to continue accepting new clients
+        ble_app_advertise();
+        break;
+
+    case BLE_GAP_EVENT_SUBSCRIBE:
+        ESP_LOGI(TAG,
+                 "BLE GAP EVENT SUBSCRIBE conn_handle=%d attr_handle=%d reason=%d "
+                 "prev_notify=%d cur_notify=%d prev_indicate=%d cur_indicate=%d",
+                 event->subscribe.conn_handle, event->subscribe.attr_handle, event->subscribe.reason,
+                 event->subscribe.prev_notify, event->subscribe.cur_notify, event->subscribe.prev_indicate,
+                 event->subscribe.cur_indicate);
+
+        // Check if subscription is for the capability characteristic's CCCD.
+        // The CCCD handle is typically the characteristic value handle + 1.
+        // g_capa_char_val_handle stores the handle of the characteristic value itself.
+        if (event->subscribe.attr_handle == g_capa_char_val_handle + 1)
+        {
+            if (event->subscribe.cur_notify)
+            {
+                ESP_LOGI(TAG, "Client subscribed to capability notifications. Sending data...");
+                // Call the function to send capability data via notifications
+                capa_notify_data(event->subscribe.conn_handle, g_capa_char_val_handle);
+            }
+            else
+            {
+                ESP_LOGI(TAG, "Client unsubscribed from capability notifications.");
+            }
+        }
+        break;
+
+    default:
+        break;
+    }
+    return 0;
+}
+
+// Define the BLE connection
+static void ble_app_advertise(void)
+{
+    int ret;
+
+    // GAP - advertising definition
+    struct ble_hs_adv_fields fields;
+    memset(&fields, 0, sizeof(fields));
+    fields.flags = BLE_HS_ADV_F_DISC_GEN | BLE_HS_ADV_F_BREDR_UNSUP;
+    fields.uuids128 = (ble_uuid128_t[]){capability_service_uuid};
+    fields.num_uuids128 = 1;
+    fields.uuids128_is_complete = 1;
+
+    ret = ble_gap_adv_set_fields(&fields);
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "Failed to set advertising data (err: %d)", ret);
+        return;
+    }
+
+    // GAP - device connectivity definition
+    struct ble_gap_adv_params adv_params;
+    memset(&adv_params, 0, sizeof(adv_params));
+    adv_params.conn_mode = BLE_GAP_CONN_MODE_UND; // connectable or non-connectable
+    adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN; // discoverable or non-discoverable
+    ret = ble_gap_adv_start(ble_addr_type, NULL, BLE_HS_FOREVER, &adv_params, ble_gap_event, NULL);
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "Advertising failed to start (err %d)", ret);
+        return;
+    }
+
+    // --- Configure Scan Response Data (SCAN_RSP) ---
+    struct ble_hs_adv_fields scan_rsp_fields;
+    memset(&scan_rsp_fields, 0, sizeof(scan_rsp_fields));
+
+    // Get the device name
+    const char *device_name;
+    device_name = ble_svc_gap_device_name();
+    scan_rsp_fields.name = (uint8_t *)device_name;
+    scan_rsp_fields.name_len = strlen(device_name);
+    scan_rsp_fields.name_is_complete = 1;
+
+    // Optionally, add TX power level to scan response
+    scan_rsp_fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
+    scan_rsp_fields.tx_pwr_lvl_is_present = 1;
+
+    ret = ble_gap_adv_rsp_set_fields(&scan_rsp_fields);
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "Error setting scan response data; rc=%d", ret);
+        return;
+    }
+}
+
+// The application
+static void ble_app_on_sync(void)
+{
+    uint8_t ble_addr[6] = {0};
+    int ret = ble_hs_id_copy_addr(BLE_ADDR_PUBLIC, ble_addr, NULL);
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "Failed to get BLE MAC address (err: %d)", ret);
+        return;
+    }
+
+    char formatted_name[32];
+    snprintf(formatted_name, sizeof(formatted_name), "Lighthouse %02X%02X", ble_addr[4], ble_addr[5]);
+    ble_svc_gap_device_name_set(formatted_name);
+
+    // Start Advertising
+    ble_hs_id_infer_auto(0, &ble_addr_type); // Determines the best address type automatically
+    ble_app_advertise();
+}
+
+// The infinite task
+static void host_task(void *param)
+{
+    nimble_port_run(); // This function will return only when nimble_port_stop() is executed
+}
+
+void remote_control_init(void)
+{
+    nimble_port_init();
+    ble_svc_gap_init();
+    ble_svc_gatt_init();
+    ble_gatts_count_cfg(gatt_svcs);
+    ble_gatts_add_svcs(gatt_svcs);
+
+    // Callback für Synchronisation
+    ble_hs_cfg.sync_cb = ble_app_on_sync;
+
+    nimble_port_freertos_init(host_task); // Start BLE-Host-Task
+}

firmware/components/storage/CMakeLists.txt

@@ -0,0 +1,6 @@
+idf_component_register(SRCS 
+                        "storage.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        spiffs
+)

firmware/components/storage/include/storage.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "esp_err.h"
+#include <sys/types.h> // For ssize_t
+
+/**
+ * @brief Initializes the SPIFFS filesystem.
+ * This function should be called once before any file operations.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t storage_init(void);
+
+/**
+ * @brief Unregisters the SPIFFS filesystem.
+ * This function should be called once when file operations are finished.
+ */
+void storage_uninit(void);
+
+/**
+ * @brief Reads a chunk of data from a file on SPIFFS.
+ * This function maintains internal state (file pointer) to allow reading
+ * the same file chunk by chunk across multiple calls.
+ *
+ * @param filename The path to the file to read (e.g., "/storage/my_file.txt").
+ *                 Must be the same filename for consecutive calls to read the same file.
+ * @param buffer   Buffer to store the read data. Must be large enough for max_bytes.
+ * @param max_bytes The maximum number of bytes to read in this call. Must be > 0.
+ * @return The number of bytes read on success (>= 0).
+ *         Returns 0 when the end of the file is reached.
+ *         Returns a negative value on error:
+ *         -1: Invalid input parameters (filename, buffer is NULL, or max_bytes is 0).
+ *         -2: Failed to open the file (first call for this filename).
+ *         -3: Filename mismatch with the currently open file (subsequent call).
+ *         -4: Read error occurred.
+ */
+ssize_t storage_read(const char *filename, char *buffer, size_t max_bytes);
+
+/**
+ * @brief Reads a chunk of data from a file on SPIFFS, starting at a specific offset.
+ * This function is stateless regarding an internally managed file pointer for sequential reads;
+ * it opens, seeks, reads, and closes the file on each call.
+ *
+ * @param filename The path to the file to read (e.g., "/storage/my_file.txt").
+ * @param buffer   Buffer to store the read data. Must be large enough for nbytes.
+ * @param offset   The offset in the file to start reading from.
+ * @param nbytes   The maximum number of bytes to read in this call. Must be > 0.
+ * @return The number of bytes read on success (>= 0).
+ *         Returns 0 when the end of the file is reached from the given offset.
+ *         Returns a negative value on error:
+ *         -1: Invalid input parameters (filename, buffer is NULL, nbytes is 0, or offset is negative).
+ *         -2: Failed to open the file.
+ *         -5: Seek error occurred.
+ *         -4: Read error occurred.
+ */
+ssize_t storage_read_at(const char *filename, char *buffer, off_t offset, size_t nbytes);

firmware/components/storage/storage.c

@@ -0,0 +1,139 @@
+#include "storage.h"
+
+#include "esp_log.h"
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "esp_spiffs.h"
+
+static const char *TAG = "storage";
+
+static FILE *s_current_file = NULL;
+static char s_current_filename[256] = {0}; // Buffer to store the current filename
+
+esp_err_t storage_init(void)
+{
+    ESP_LOGI(TAG, "Initializing Storage");
+
+    esp_vfs_spiffs_conf_t conf = {
+        .base_path = "/storage",       // Path where the filesystem will be mounted
+        .partition_label = "storage",  // Partition label (must match partitions.csv)
+        .max_files = 5,                // Maximum number of files that can be open at the same time
+        .format_if_mount_failed = true // Format partition if mount fails
+    };
+
+    // Initialize and mount SPIFFS
+    esp_err_t ret = esp_vfs_spiffs_register(&conf);
+
+    if (ret != ESP_OK)
+    {
+        if (ret == ESP_FAIL)
+        {
+            ESP_LOGE(TAG, "Failed to mount or format filesystem");
+        }
+        else if (ret == ESP_ERR_NOT_FOUND)
+        {
+            ESP_LOGE(TAG, "Failed to find SPIFFS partition");
+        }
+        else
+        {
+            ESP_LOGE(TAG, "Failed to initialize SPIFFS (%s)", esp_err_to_name(ret));
+        }
+        return ret;
+    }
+
+    ESP_LOGI(TAG, "SPIFFS mounted");
+    return ESP_OK;
+}
+
+void storage_uninit(void)
+{
+    if (s_current_file != NULL)
+    {
+        // Log before clearing s_current_filename, using its value.
+        ESP_LOGW(TAG, "File '%s' was still open during uninit. Closing it.", s_current_filename);
+        fclose(s_current_file); // Close the file
+        s_current_file = NULL;
+        s_current_filename[0] = '\0';
+    }
+    esp_vfs_spiffs_unregister("storage");
+    ESP_LOGI(TAG, "SPIFFS unmounted");
+}
+
+ssize_t storage_read(const char *filename, char *buffer, size_t max_bytes)
+{
+    // Input validation
+    if (filename == NULL || filename[0] == '\0' || buffer == NULL || max_bytes == 0)
+    {
+        ESP_LOGE(TAG, "Invalid input parameters for storage_read");
+        return -1;
+    }
+
+    // If no file is currently open, open the requested one
+    if (s_current_file == NULL)
+    {
+        s_current_file = fopen(filename, "r");
+        if (s_current_file == NULL)
+        {
+            ESP_LOGE(TAG, "Failed to open file for reading: %s", filename);
+            s_current_filename[0] = '\0'; // Clear filename as open failed
+            return -2;                    // Failed to open file
+        }
+        // Store the filename for subsequent calls
+        strncpy(s_current_filename, filename, sizeof(s_current_filename) - 1);
+        s_current_filename[sizeof(s_current_filename) - 1] = '\0';
+        ESP_LOGI(TAG, "Opened file: %s", s_current_filename);
+    }
+    else
+    {
+        // If a file is open, ensure it's the same file requested
+        if (strcmp(filename, s_current_filename) != 0)
+        {
+            ESP_LOGE(TAG, "Filename mismatch. Expected '%s', got '%s'. Close the current file first.",
+                     s_current_filename, filename);
+            // Note: File remains open. Caller might need a separate close function
+            // or ensure read loop finishes (returns 0 or error) before changing filename.
+            return -3; // Filename mismatch
+        }
+    }
+
+    // Read a chunk
+    size_t bytes_read = fread(buffer, 1, max_bytes, s_current_file);
+
+    // Check for read errors
+    if (ferror(s_current_file))
+    {
+        ESP_LOGE(TAG, "Error reading file: %s", s_current_filename);
+        fclose(s_current_file);
+        s_current_file = NULL;
+        s_current_filename[0] = '\0';
+        return -4; // Read error
+    }
+
+    // If fread returns 0 and it's not an error, it means EOF or an empty file.
+    // The file should be closed only when no more bytes can be read (i.e., bytes_read == 0).
+    if (bytes_read == 0) // Indicates EOF or empty file (and no ferror)
+    {
+        // Log before clearing s_current_filename.
+        // feof(s_current_file) should be true if end of file was actually reached.
+        if (feof(s_current_file))
+        {
+            ESP_LOGI(TAG, "EOF reached for file: %s. Closing file.", s_current_filename);
+        }
+        else
+        {
+            ESP_LOGI(TAG, "Read 0 bytes from file: %s (possibly empty or already at EOF). Closing file.",
+                     s_current_filename);
+        }
+        fclose(s_current_file);
+        s_current_file = NULL;
+        s_current_filename[0] = '\0';
+        // Return 0 as per contract: "Returns 0 when the end of the file is reached."
+    }
+    // If bytes_read > 0, return the number of bytes read.
+    // The file remains open (even if EOF was hit during this read and bytes_read < max_bytes).
+    // The next call to storage_read for this file will then result in fread returning 0,
+    // which will then hit the (bytes_read == 0) condition above and close the file.
+    return bytes_read;
+}

firmware/data/capability.json

@@ -0,0 +1,47 @@
+{
+    "module": "Lighthouse",
+    "capabilities": [
+        {
+            "id": 0,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 1,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 2,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 3,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 4,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 5,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        },
+        {
+            "id": 6,
+            "type": "toggle",
+            "default": "0",
+            "label": "L8"
+        }
+    ]
+}

firmware/main/CMakeLists.txt

@@ -0,0 +1,5 @@
+idf_component_register(SRCS 
+                        "main.c"
+                    INCLUDE_DIRS "."
+)
+spiffs_create_partition_image(storage ../data FLASH_IN_PROJECT)

firmware/main/Kconfig.projbuild

@@ -0,0 +1,40 @@
+menu "Warnemuende Lighthouse"
+    config WLED_DIN_PIN
+        int "WLED Data In Pin"
+        default 8
+        help
+            The number of the WLED data in pin.
+
+    config WLED_USE_DMA
+        bool "Use DMA for WLED"
+        default n
+        help
+            Use DMA to drive the WLED strip. This is more efficient and allows for smoother animations.
+
+    config WLED_DMA_USAGE
+        int
+        default 1 if WLED_USE_DMA
+        default 0 if !WLED_USE_DMA
+
+    choice LIGHT_CHARACTERISTIC_CHOICE
+        prompt "Light characteristic"
+        default LIGHT_CHARACTERISTIC_GREEN
+        help
+            The color of the main WLED light.
+
+        config LIGHT_CHARACTERISTIC_GREEN
+            bool "Green flashing light"
+            help
+                The light will be flashing green.
+
+        config LIGHT_CHARACTERISTIC_RED
+            bool "Red flashing light"
+            help
+                The light will be flashing red.
+    endchoice
+
+    config LIGHT_CHARACTERISTIC_VALUE
+        int
+        default 1 if LIGHT_CHARACTERISTIC_GREEN
+        default 2 if LIGHT_CHARACTERISTIC_RED
+endmenu

firmware/main/idf_component.yml

@@ -0,0 +1,16 @@
+## IDF Component Manager Manifest File
+dependencies:
+  ## Required IDF version
+  idf:
+    version: '>=5.4.0'
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true

firmware/main/main.c

@@ -0,0 +1,43 @@
+#include "light.h"
+#include "persistence.h"
+#include "remote_control.h"
+
+void app_main(void)
+{
+    /// init persistence
+    persistence_init("lighthouse");
+
+    /// init WLED
+    if (wled_init() != ESP_OK)
+    {
+        printf("Failed to initialize WLED");
+        return;
+    }
+
+    /// start beacon service
+    if (beacon_init() != ESP_OK)
+    {
+        printf("Failed to initialize beacon");
+        return;
+    }
+    if (beacon_start() != ESP_OK)
+    {
+        printf("Failed to start beacon");
+        return;
+    }
+
+    /// start outdoor light service
+    if (outdoor_init() != ESP_OK)
+    {
+        printf("Failed to initialize outdoor");
+        return;
+    }
+    if (outdoor_start() != ESP_OK)
+    {
+        printf("Failed to start outdoor");
+        return;
+    }
+
+    /// activate BLE functions
+    remote_control_init();
+}

firmware/partitions.csv

@@ -0,0 +1,7 @@
+# Name   , Type , SubType  , Offset  , Size  , Flags
+nvs      , data , nvs      , 0x9000  ,   20k ,
+otadata  , data , ota      , 0xe000  ,    8k ,
+app0     , app  , ota_0    , 0x10000 , 1024k ,
+app1     , app  , ota_1    ,         , 1024k ,
+storage  , data , spiffs   ,         , 1536k ,
+coredump , data , coredump ,         ,   64k ,

firmware/sdkconfig.defaults

@@ -0,0 +1,23 @@
+# activate Bluetooth Low Energy (BLE)
+CONFIG_BT_ENABLED=y
+CONFIG_BT_NIMBLE_ENABLED=y
+
+# NimBLE Options
+CONFIG_BT_NIMBLE_SECURITY_ENABLE=n
+CONFIG_BT_NIMBLE_SVC_GAP_DEVICE_NAME="lighthouse"
+
+# Logging
+CONFIG_LOG_DEFAULT_LEVEL_INFO=y
+CONFIG_LOG_DEFAULT_LEVEL=3
+CONFIG_LOG_MAXIMUM_LEVEL=3
+
+# Flash Size
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+
+# Partitions
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+
+# ESP System Settings
+CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_80=y

firmware/sdkconfig.defaults.esp32

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32"

firmware/sdkconfig.defaults.esp32c3

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32c3"

firmware/sdkconfig.defaults.esp32c5

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32c5"

firmware/sdkconfig.defaults.esp32c6

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32c6"

firmware/sdkconfig.defaults.esp32h2

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32h2"

firmware/sdkconfig.defaults.esp32p4

@@ -0,0 +1,2 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32p4"

firmware/sdkconfig.defaults.esp32s3

@@ -0,0 +1,3 @@
+# default ESP target
+CONFIG_IDF_TARGET="esp32s3"
+CONFIG_WLED_USE_DMA=y

firmware/version.txt

@@ -0,0 +1 @@
+0.1.0