Add NVS support for relay channel config persistence

- Introduced NVS configuration options in Kconfig.
- Implemented NVS initialization and deinitialization in relay_chn_core.
- Added functions for storing and retrieving relay channel direction and tilt sensitivity in NVS.
- Updated relay_chn_tilt and relay_chn_output to utilize NVS for state management.
- Created relay_chn_nvs.c and relay_chn_nvs.h for NVS-related functionalities.

Closes #1074.

CMakeLists.txt

@@ -15,7 +15,12 @@ else()
     list(APPEND srcs "src/relay_chn_ctl_single.c")
 endif()
 
+if(CONFIG_RELAY_CHN_NVS)
+    list(APPEND srcs "src/relay_chn_nvs.c")
+endif()
+
+
 idf_component_register(SRCS ${srcs}
                        INCLUDE_DIRS ${include_dirs}
                        PRIV_INCLUDE_DIRS ${priv_include_dirs}
-                       REQUIRES driver esp_timer esp_event)
+                       REQUIRES driver esp_timer esp_event nvs_flash)

Kconfig

@@ -26,4 +26,39 @@ menu "Relay Channel Driver Configuration"
             at a time. Tilting is specifically designed for controlling some
             types of curtains that need to be adjusted to let enter specific
             amount of day light.
+    
+    config RELAY_CHN_ENABLE_NVS
+        bool "Enable persistent NVS storage for relay channel"
+        default n
+        help
+            If enabled, relay channel configuration will be stored in NVS.
+
+endmenu
+
+menu "Relay Channel NVS Storage Configuration"
+    depends on RELAY_CHN_ENABLE_NVS
+
+    config RELAY_CHN_NVS_NAMESPACE
+        string "NVS namespace for relay channel storage"
+        default "relay_chn"
+        help
+            The NVS namespace used for storing relay channel configuration.
+            This should be unique to avoid conflicts with other components.
+
+    config RELAY_CHN_NVS_CUSTOM_PARTITION
+        bool "Use custom NVS partition for relay channel storage"
+        default n
+        help
+            If enabled, a custom NVS partition will be used for storing
+            relay channel configuration. If disabled, the default NVS
+            partition will be used.
+    
+    config RELAY_CHN_NVS_CUSTOM_PARTITION_NAME
+        string "Custom NVS partition name"
+        depends on RELAY_CHN_NVS_CUSTOM_PARTITION
+        default "app_data"
+        help
+            The name of the custom NVS partition used for storing relay channel
+            configuration. Make sure the name is exactly the same as label defined
+            in the relevant partition table.
 endmenu

include/relay_chn_defs.h

@@ -14,6 +14,15 @@ extern "C" {
 #define RELAY_CHN_OPPOSITE_INERTIA_MS CONFIG_RELAY_CHN_OPPOSITE_INERTIA_MS
 #define RELAY_CHN_COUNT CONFIG_RELAY_CHN_COUNT
 #define RELAY_CHN_ENABLE_TILTING CONFIG_RELAY_CHN_ENABLE_TILTING
+#define RELAY_CHN_ENABLE_NVS CONFIG_RELAY_CHN_ENABLE_NVS
+
+#if RELAY_CHN_ENABLE_NVS == 1
+#define RELAY_CHN_NVS_NAMESPACE CONFIG_RELAY_CHN_NVS_NAMESPACE
+#define RELAY_CHN_NVS_CUSTOM_PARTITION CONFIG_RELAY_CHN_NVS_CUSTOM_PARTITION
+#if RELAY_CHN_NVS_CUSTOM_PARTITION == 1
+#define RELAY_CHN_NVS_CUSTOM_PARTITION_NAME CONFIG_RELAY_CHN_NVS_CUSTOM_PARTITION_NAME
+#endif
+#endif
 
 #if RELAY_CHN_COUNT > 1
 #define RELAY_CHN_ID_ALL RELAY_CHN_COUNT /*!< Special ID to address all channels */

private_include/relay_chn_nvs.h

@@ -0,0 +1,106 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Kozmotronik Tech
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include "esp_err.h"
+#include "nvs_flash.h"
+#include "nvs.h"
+#include "relay_chn_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize NVS storage for relay channels.
+ * 
+ * @attention Before calling this function, make sure the NVS flash is initialised 
+ * using either the nvs_flash_init() function for the default NVS partition or the 
+ * nvs_flash_init_partition() function for a custom partition.
+ *
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_init(void);
+
+/**
+ * @brief Store relay channel direction in NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[in] direction Direction to store.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_set_direction(uint8_t ch, relay_chn_direction_t direction);
+
+/**
+ * @brief Retrieve relay channel direction from NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[out] direction Pointer to store retrieved direction.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_get_direction(uint8_t ch, relay_chn_direction_t *direction);
+
+#ifdef RELAY_CHN_ENABLE_TILTING
+/**
+ * @brief Store tilt sensitivity in NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[in] sensitivity Sensitivity value to store.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_set_tilt_sensitivity(uint8_t ch, uint8_t sensitivity);
+
+/**
+ * @brief Retrieve tilt sensitivity from NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[out] sensitivity Pointer to store retrieved sensitivity.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_get_tilt_sensitivity(uint8_t ch, uint8_t *sensitivity);
+
+/**
+ * @brief Store tilt counters in NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[in] forward_count Forward tilt counter value.
+ * @param[in] reverse_count Reverse tilt counter value.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_set_tilt_count(uint8_t ch, uint32_t forward_count, uint32_t reverse_count);
+
+/**
+ * @brief Retrieve tilt counters from NVS.
+ *
+ * @param[in] ch Channel number.
+ * @param[out] forward_count Pointer to store forward tilt counter.
+ * @param[out] reverse_count Pointer to store reverse tilt counter.
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_get_tilt_count(uint8_t ch, uint32_t *forward_count, uint32_t *reverse_count);
+#endif // RELAY_CHN_ENABLE_TILTING
+
+/**
+ * @brief Erase all keys in the NVS namespace.
+ *
+ * This function will erase all key-value pairs in the NVS namespace used by relay channels.
+ *
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_erase_all(void);
+
+/**
+ * @brief Deinitialize NVS storage for relay channels.
+ *
+ * @return ESP_OK on success, error code otherwise.
+ */
+esp_err_t relay_chn_nvs_deinit(void);
+
+#ifdef __cplusplus
+}
+#endif

src/relay_chn_core.c

@@ -11,9 +11,15 @@
 #include "relay_chn_output.h"
 #include "relay_chn_run_info.h"
 #include "relay_chn_ctl.h"
+
 #if RELAY_CHN_ENABLE_TILTING == 1
 #include "relay_chn_tilt.h"
 #endif
+
+#if RELAY_CHN_ENABLE_NVS == 1
+#include "relay_chn_nvs.h"
+#endif
+
 #include "relay_chn_core.h"
 
 
@@ -89,6 +95,11 @@ esp_err_t relay_chn_create(const uint8_t* gpio_map, uint8_t gpio_count)
     ESP_RETURN_ON_FALSE(gpio_map != NULL, ESP_ERR_INVALID_ARG, TAG, "gpio_map cannot be NULL");
 
     esp_err_t ret;
+#if RELAY_CHN_ENABLE_NVS == 1
+    ret = relay_chn_nvs_init();
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to initialize NVS for relay channel");
+#endif
+
     // Initialize the output
     ret = relay_chn_output_init(gpio_map, gpio_count);
     ESP_RETURN_ON_ERROR(ret, TAG, "Failed to initialize relay channel outputs");
@@ -137,6 +148,10 @@ void relay_chn_destroy(void)
     relay_chn_ctl_deinit();
     relay_chn_output_deinit();
 
+#if RELAY_CHN_ENABLE_NVS == 1
+    relay_chn_nvs_deinit();
+#endif
+
     // Destroy the event loop
     esp_event_loop_delete(relay_chn_event_loop);
     relay_chn_event_loop = NULL;

src/relay_chn_nvs.c

@@ -0,0 +1,125 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Kozmotronik Tech
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "esp_check.h"
+#include "relay_chn_nvs.h"
+
+#define RELAY_CHN_KEY_DIR          "dir"
+#ifdef RELAY_CHN_ENABLE_TILTING
+#define RELAY_CHN_KEY_SENS(ch)     "sens_%d"
+#define RELAY_CHN_KEY_TFWD(ch)     "tfwd_%d"
+#define RELAY_CHN_KEY_TREV(ch)     "trev_%d"
+#endif
+
+static const char *TAG = "RELAY_CHN_STORAGE_NVS";
+
+static nvs_handle_t relay_chn_nvs;
+
+esp_err_t relay_chn_nvs_init()
+{
+    esp_err_t ret;
+#if RELAY_CHN_NVS_CUSTOM_PARTITION == 1
+    ret = nvs_open_from_partition(RELAY_CHN_NVS_CUSTOM_PARTITION_NAME,
+                                  RELAY_CHN_NVS_NAMESPACE,
+                                  NVS_READWRITE,
+                                  &relay_chn_nvs);
+
+    ESP_RETURN_ON_ERROR(ret,
+                        TAG,
+                        "Failed to open NVS namespace '%s' from partition '%s' with error %s",
+                        RELAY_CHN_NVS_NAMESPACE,
+                        RELAY_CHN_NVS_CUSTOM_PARTITION_NAME,
+                        esp_err_to_name(ret));
+#else
+    ret = nvs_open(RELAY_CHN_NVS_NAMESPACE, NVS_READWRITE, &relay_chn_nvs);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to open NVS namespace '%s'", RELAY_CHN_NVS_NAMESPACE);
+#endif // RELAY_CHN_NVS_CUSTOM_PARTITION
+    return ESP_OK;
+}
+
+esp_err_t relay_chn_nvs_set_direction(uint8_t ch, relay_chn_direction_t direction)
+{
+    uint8_t direction_val;
+    esp_err_t ret = nvs_get_u8(relay_chn_nvs, RELAY_CHN_KEY_DIR, &direction_val);
+    if (ret == ESP_ERR_NVS_NOT_FOUND) {
+        // The key does not exist yet, set it to zero which is the default direction
+        direction_val = RELAY_CHN_DIRECTION_DEFAULT;
+    } else if (ret != ESP_OK) {
+        ESP_RETURN_ON_ERROR(ret, TAG, "Failed to get direction from NVS with error: %s", esp_err_to_name(ret));
+    }
+    direction_val &= ~(1 << ch); // Clear the bit for the channel
+    direction_val |= (((uint8_t) direction) << ch); // Set the new direction bit
+    ret = nvs_set_u8(relay_chn_nvs, RELAY_CHN_KEY_DIR, direction_val);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to set direction for channel %d", ch);
+    return nvs_commit(relay_chn_nvs);
+}
+
+esp_err_t relay_chn_nvs_get_direction(uint8_t ch, relay_chn_direction_t *direction)
+{
+    ESP_RETURN_ON_FALSE(direction != NULL, ESP_ERR_INVALID_ARG, TAG, "Direction pointer is NULL");
+
+    uint8_t direction_val;
+    esp_err_t ret = nvs_get_u8(relay_chn_nvs, RELAY_CHN_KEY_DIR, &direction_val);
+    if (ret != ESP_OK) {
+        return ret; // Return error if the key does not exist
+    }
+    *direction = (relay_chn_direction_t)((direction_val >> ch) & 0x01);
+    return ESP_OK;
+}
+
+#ifdef RELAY_CHN_ENABLE_TILTING
+esp_err_t relay_chn_nvs_set_tilt_sensitivity(uint8_t ch, uint8_t sensitivity)
+{
+    esp_err_t ret = nvs_set_u8(relay_chn_nvs, RELAY_CHN_KEY_SENS(ch), sensitivity);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to set tilt sensitivity for channel %d", ch);
+    return nvs_commit(relay_chn_nvs);
+}
+
+esp_err_t relay_chn_nvs_get_tilt_sensitivity(uint8_t ch, uint8_t *sensitivity)
+{
+    ESP_RETURN_ON_FALSE(sensitivity != NULL, ESP_ERR_INVALID_ARG, TAG, "Sensitivity pointer is NULL");
+
+    return nvs_get_u8(relay_chn_nvs, RELAY_CHN_KEY_SENS(ch), sensitivity);
+}
+
+esp_err_t relay_chn_nvs_set_tilt_count(uint8_t ch, uint32_t forward_count, uint32_t reverse_count)
+{
+    esp_err_t ret;
+    ret = nvs_set_u32(relay_chn_nvs, RELAY_CHN_KEY_TFWD(ch), forward_count);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to save forward_count tilt counter");
+    ret = nvs_set_u32(relay_chn_nvs, RELAY_CHN_KEY_TREV(ch), reverse_count);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to save reverse_count tilt counter");
+    return nvs_commit(relay_chn_nvs);
+}
+
+esp_err_t relay_chn_nvs_get_tilt_count(uint8_t ch, uint32_t *forward_count, uint32_t *reverse_count)
+{
+    ESP_RETURN_ON_FALSE(forward_count != NULL && reverse_count != NULL,
+                        ESP_ERR_INVALID_ARG, TAG, "Counter pointers are NULL");
+
+    esp_err_t ret = nvs_get_u32(relay_chn_nvs, RELAY_CHN_KEY_TFWD(ch), forward_count);
+    if (ret != ESP_OK) {
+        return ret; // Return error if the key does not exist
+    }
+    return nvs_get_u32(relay_chn_nvs, RELAY_CHN_KEY_TREV(ch), reverse_count);
+}
+#endif // RELAY_CHN_ENABLE_TILTING
+
+esp_err_t relay_chn_nvs_erase_all()
+{
+    // Erase all key-value pairs in the relay_chn NVS namespace
+    esp_err_t ret = nvs_erase_all(relay_chn_nvs);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to erase all keys in NVS namespace '%s'", RELAY_CHN_NVS_NAMESPACE);
+    
+    // Commit the changes
+    return nvs_commit(relay_chn_nvs);
+}
+
+esp_err_t relay_chn_nvs_deinit()
+{
+    nvs_close(relay_chn_nvs);
+    return ESP_OK;
+}

src/relay_chn_output.c

@@ -10,6 +10,10 @@
 #include "relay_chn_output.h"
 #include "relay_chn_core.h"
 
+#if RELAY_CHN_ENABLE_NVS == 1
+#include "relay_chn_nvs.h"
+#endif
+
 
 static const char *TAG = "RELAY_CHN_OUTPUT";
 
@@ -38,7 +42,10 @@ static esp_err_t relay_chn_output_check_gpio_capabilities(uint8_t gpio_count)
     return ESP_OK;
 }
 
-static esp_err_t relay_chn_output_ctl_init(relay_chn_output_t *output, gpio_num_t forward_pin, gpio_num_t reverse_pin)
+static esp_err_t relay_chn_output_ctl_init(relay_chn_output_t *output,
+                                           gpio_num_t forward_pin,
+                                           gpio_num_t reverse_pin,
+                                           relay_chn_direction_t direction)
 {
     ESP_RETURN_ON_FALSE(GPIO_IS_VALID_OUTPUT_GPIO(forward_pin), ESP_ERR_INVALID_ARG, TAG,
                         "Invalid GPIO pin number for forward_pin: %d", forward_pin);
@@ -60,12 +67,26 @@ static esp_err_t relay_chn_output_ctl_init(relay_chn_output_t *output, gpio_num_
     // Initialize the GPIOs
 
     // Initialize the relay channel output
-    output->forward_pin = forward_pin;
+    output->forward_pin = direction == RELAY_CHN_DIRECTION_DEFAULT ? forward_pin : reverse_pin;
-    output->reverse_pin = reverse_pin;
+    output->reverse_pin = direction == RELAY_CHN_DIRECTION_DEFAULT ? reverse_pin : forward_pin;
-    output->direction = RELAY_CHN_DIRECTION_DEFAULT;
+    output->direction = direction;
     return ESP_OK;
 }
 
+#if RELAY_CHN_ENABLE_NVS == 1
+static esp_err_t relay_chn_output_load_direction(uint8_t ch, relay_chn_direction_t *direction)
+{
+    esp_err_t ret = relay_chn_nvs_get_direction(ch, direction);
+    if (ret == ESP_ERR_NVS_NOT_FOUND) {
+        // If the key does not exist, use the default direction
+        *direction = RELAY_CHN_DIRECTION_DEFAULT;
+    } else if (ret != ESP_OK) {
+        ESP_RETURN_ON_ERROR(ret, TAG, "Failed to get direction from storage for channel %d: %s", ch, esp_err_to_name(ret));
+    }
+    return ESP_OK;
+}
+#endif
+
 esp_err_t relay_chn_output_init(const uint8_t* gpio_map, uint8_t gpio_count)
 {
     esp_err_t ret;
@@ -78,12 +99,24 @@ esp_err_t relay_chn_output_init(const uint8_t* gpio_map, uint8_t gpio_count)
         int gpio_index = i << 1; // gpio_index = i * 2
         gpio_num_t forward_pin = (gpio_num_t) gpio_map[gpio_index];
         gpio_num_t reverse_pin = (gpio_num_t) gpio_map[gpio_index + 1];
-        
+
-        ret = relay_chn_output_ctl_init(output, forward_pin, reverse_pin);
+        relay_chn_direction_t direction = RELAY_CHN_DIRECTION_DEFAULT;
+#if RELAY_CHN_ENABLE_NVS == 1
+        // If NVS storage is enabled, retrieve the direction from storage
+        ret = relay_chn_output_load_direction(i, &direction);
+        ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load direction from storage for channel %d", i);
+#endif
+        ret = relay_chn_output_ctl_init(output, forward_pin, reverse_pin, direction);
         ESP_RETURN_ON_ERROR(ret, TAG, "Failed to initialize relay channel %d", i);
     }
 #else
-    ret = relay_chn_output_ctl_init(&output, gpio_map[0], gpio_map[1]);
+    relay_chn_direction_t direction = RELAY_CHN_DIRECTION_DEFAULT;
+#if RELAY_CHN_ENABLE_NVS == 1
+    // If NVS storage is enabled, retrieve the direction from storage
+    ret = relay_chn_output_load_direction(0, &direction);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load direction from storage for channel %d", 0);
+#endif
+    ret = relay_chn_output_ctl_init(&output, gpio_map[0], gpio_map[1], direction);
     ESP_RETURN_ON_ERROR(ret, TAG, "Failed to initialize relay channel");
 #endif
     return ESP_OK;
@@ -160,6 +193,22 @@ void relay_chn_output_flip(relay_chn_output_t *output)
     output->direction = (output->direction == RELAY_CHN_DIRECTION_DEFAULT) 
                         ? RELAY_CHN_DIRECTION_FLIPPED 
                         : RELAY_CHN_DIRECTION_DEFAULT;
+
+#if RELAY_CHN_ENABLE_NVS == 1
+    uint8_t ch = 0;
+#if RELAY_CHN_COUNT > 1
+    for (uint8_t i = 0; i < RELAY_CHN_COUNT; i++) {
+        if (output == &outputs[i]) {
+            ch = i;
+            break;
+        }
+    }
+#endif
+    esp_err_t ret = relay_chn_nvs_set_direction(ch, output->direction);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to save flipped direction for channel %d: %s", ch, esp_err_to_name(ret));
+    }
+#endif
 }
 
 relay_chn_direction_t relay_chn_output_get_direction(relay_chn_output_t *output)

src/relay_chn_tilt.c

@@ -10,6 +10,12 @@
 #include "relay_chn_run_info.h"
 #include "relay_chn_tilt.h"
 
+#if RELAY_CHN_ENABLE_NVS == 1
+#include "relay_chn_nvs.h"
+
+#define RELAY_CHN_TILT_FLUSH_DEBOUNCE_MS 3000
+#endif
+
 
 static const char *TAG = "RELAY_CHN_TILT";
 
@@ -65,6 +71,9 @@ typedef struct relay_chn_tilt_ctl {
     relay_chn_tilt_timing_t tilt_timing;    /*!< Tilt timing structure */
     relay_chn_tilt_counter_t tilt_counter;  /*!< Tilt counter structure */
     esp_timer_handle_t tilt_timer;          /*!< Tilt timer handle */
+#if RELAY_CHN_ENABLE_NVS == 1
+    esp_timer_handle_t flush_timer;         /*!< Flush timer to avoid frequent write of tilt counters */
+#endif
 } relay_chn_tilt_ctl_t;
 
 
@@ -295,7 +304,7 @@ static void relay_chn_tilt_set_timing_values(relay_chn_tilt_timing_t *tilt_timin
     tilt_timing->pause_time_ms = pause_time_ms;
 }
 
-static void _relay_chn_tilt_sensitivity_set(relay_chn_tilt_ctl_t *tilt_ctl, uint8_t sensitivity)
+static void relay_chn_tilt_compute_set_sensitivity(relay_chn_tilt_ctl_t *tilt_ctl, uint8_t sensitivity)
 {
     if (sensitivity >= 100) {
         relay_chn_tilt_set_timing_values(&tilt_ctl->tilt_timing,
@@ -309,6 +318,12 @@ static void _relay_chn_tilt_sensitivity_set(relay_chn_tilt_ctl_t *tilt_ctl, uint
                                          RELAY_CHN_TILT_RUN_MIN_MS,
                                          RELAY_CHN_TILT_PAUSE_MIN_MS);
     }
+    else if (sensitivity == RELAY_CHN_TILT_DEFAULT_SENSITIVITY) {
+        relay_chn_tilt_set_timing_values(&tilt_ctl->tilt_timing,
+                                         sensitivity,
+                                         RELAY_CHN_TILT_DEFAULT_RUN_MS,
+                                         RELAY_CHN_TILT_DEFAULT_PAUSE_MS);
+    }
     else {
         // Compute the new timing values from the sensitivity percent value by using linear interpolation
         uint32_t tilt_run_time_ms = 0, tilt_pause_time_ms = 0;
@@ -331,12 +346,16 @@ void relay_chn_tilt_set_sensitivity(uint8_t chn_id, uint8_t sensitivity)
     
     if (chn_id == RELAY_CHN_ID_ALL) {
         for (int i = 0; i < RELAY_CHN_COUNT; i++) {
-            _relay_chn_tilt_sensitivity_set(&tilt_ctls[i], sensitivity);
+            relay_chn_tilt_compute_set_sensitivity(&tilt_ctls[i], sensitivity);
         }
     }
     else {
-        _relay_chn_tilt_sensitivity_set(&tilt_ctls[chn_id], sensitivity);
+        relay_chn_tilt_compute_set_sensitivity(&tilt_ctls[chn_id], sensitivity);
     }
+    
+#if RELAY_CHN_ENABLE_NVS == 1
+    relay_chn_nvs_set_tilt_sensitivity(chn_id, sensitivity);
+#endif // RELAY_CHN_ENABLE_NVS
 }
 
 esp_err_t relay_chn_tilt_get_sensitivity(uint8_t chn_id, uint8_t *sensitivity, size_t length)
@@ -367,7 +386,11 @@ esp_err_t relay_chn_tilt_get_sensitivity(uint8_t chn_id, uint8_t *sensitivity, s
 
 void relay_chn_tilt_set_sensitivity(uint8_t sensitivity)
 {
-    _relay_chn_tilt_sensitivity_set(&tilt_ctl, sensitivity);
+    relay_chn_tilt_compute_set_sensitivity(&tilt_ctl, sensitivity);
+    
+#if RELAY_CHN_ENABLE_NVS == 1
+    relay_chn_nvs_set_tilt_sensitivity(0, sensitivity);
+#endif // RELAY_CHN_ENABLE_NVS
 }
 
 uint8_t relay_chn_tilt_get_sensitivity()
@@ -380,6 +403,10 @@ void relay_chn_tilt_reset_count(relay_chn_tilt_ctl_t *tilt_ctl)
 {
     tilt_ctl->tilt_counter.tilt_forward_count = 0;
     tilt_ctl->tilt_counter.tilt_reverse_count = 0;
+
+#if RELAY_CHN_ENABLE_NVS == 1
+    esp_timer_stop(tilt_ctl->flush_timer);
+#endif
 }
 
 /**
@@ -449,6 +476,31 @@ static uint32_t relay_chn_tilt_count_update(relay_chn_tilt_ctl_t *tilt_ctl)
     return 0;
 }
 
+#if RELAY_CHN_ENABLE_NVS == 1
+static esp_err_t relay_chn_tilt_save_tilt_counter(relay_chn_tilt_ctl_t *tilt_ctl)
+{
+     // Save the tilt count to NVS storage
+    esp_err_t ret = relay_chn_nvs_set_tilt_count(tilt_ctl->chn_ctl->id,
+                                                         tilt_ctl->tilt_counter.tilt_forward_count,
+                                                         tilt_ctl->tilt_counter.tilt_reverse_count);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "relay_chn_tilt_execute_stop: Failed to save tilt count for channel #%d: %s", tilt_ctl->chn_ctl->id, esp_err_to_name(ret));
+    }
+    return ESP_OK;
+}
+
+static void relay_chn_tilt_flush_timer_cb(void *arg)
+{
+    relay_chn_tilt_ctl_t* tilt_ctl = (relay_chn_tilt_ctl_t*) arg;
+    ESP_RETURN_VOID_ON_FALSE(tilt_ctl != NULL, TAG, "relay_chn_tilt_flush_timer_cb: timer arg is NULL");
+    // Save the tilt count to storage
+    esp_err_t ret = relay_chn_tilt_save_tilt_counter(tilt_ctl);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "relay_chn_tilt_execute_stop: Failed to save tilt count for channel #%d: %s", tilt_ctl->chn_ctl->id, esp_err_to_name(ret));
+    }
+}
+#endif
+
 static void relay_chn_tilt_execute_stop(relay_chn_tilt_ctl_t *tilt_ctl)
 {
     // Stop the channel's timer if active
@@ -461,6 +513,11 @@ static void relay_chn_tilt_execute_stop(relay_chn_tilt_ctl_t *tilt_ctl)
         ESP_LOGE(TAG, "relay_chn_tilt_execute_stop: Failed to output stop for relay channel #%d!", tilt_ctl->chn_ctl->id);
     }
     relay_chn_dispatch_cmd(tilt_ctl->chn_ctl, RELAY_CHN_CMD_STOP);
+
+#if RELAY_CHN_ENABLE_NVS == 1
+    // Start the flush debounce timer
+    relay_chn_start_esp_timer_once(tilt_ctl->flush_timer, RELAY_CHN_TILT_FLUSH_DEBOUNCE_MS);
+#endif
 }
 
 static void relay_chn_tilt_execute_forward(relay_chn_tilt_ctl_t *tilt_ctl)
@@ -544,7 +601,7 @@ static void relay_chn_tilt_event_handler(void *handler_arg, esp_event_base_t eve
 static void relay_chn_tilt_timer_cb(void *arg)
 {
     relay_chn_tilt_ctl_t* tilt_ctl = (relay_chn_tilt_ctl_t*) arg;
-    ESP_RETURN_VOID_ON_FALSE(tilt_ctl != NULL, TAG, "relay_chn_tilt_timer_cb: event_data is NULL");
+    ESP_RETURN_VOID_ON_FALSE(tilt_ctl != NULL, TAG, "relay_chn_tilt_timer_cb: timer arg is NULL");
     
     switch (tilt_ctl->step)
     {
@@ -571,17 +628,44 @@ static void relay_chn_tilt_timer_cb(void *arg)
     }
 }
 
-esp_err_t relay_chn_tilt_ctl_init(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_ctl_t *chn_ctl)
+#if RELAY_CHN_ENABLE_NVS == 1
+static esp_err_t relay_chn_tilt_load_sensitivity(uint8_t ch, uint8_t *sensitivity)
+{
+    esp_err_t ret = relay_chn_nvs_get_tilt_sensitivity(ch, sensitivity);
+    if (ret == ESP_ERR_NVS_NOT_FOUND) {
+        *sensitivity = RELAY_CHN_TILT_DEFAULT_SENSITIVITY;
+        return ESP_OK;
+    }
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt sensitivity for channel %d", ch);
+    return ESP_OK;
+}
+
+static esp_err_t relay_chn_tilt_load_tilt_counter(uint8_t ch, relay_chn_tilt_counter_t *tilt_counter)
+{
+    esp_err_t ret = relay_chn_nvs_get_tilt_count(ch, &tilt_counter->tilt_forward_count, &tilt_counter->tilt_reverse_count);
+    if (ret == ESP_ERR_NVS_NOT_FOUND) {
+        ESP_LOGD(TAG, "relay_chn_tilt_load_tilt_counter: No tilt counters found in NVS for channel %d, initializing to zero", ch);
+        tilt_counter->tilt_forward_count = 0;
+        tilt_counter->tilt_reverse_count = 0;
+        return ESP_OK;
+    }
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt counters for channel %d", ch);
+    return ESP_OK;
+}
+#endif // RELAY_CHN_ENABLE_NVS
+
+static esp_err_t relay_chn_tilt_ctl_init(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_ctl_t *chn_ctl,
+                                         relay_chn_tilt_counter_t *tilt_counter, uint8_t sensitivity)
 {
     tilt_ctl->cmd = RELAY_CHN_TILT_CMD_NONE;
     tilt_ctl->step = RELAY_CHN_TILT_STEP_NONE;
-    tilt_ctl->tilt_timing.sensitivity = RELAY_CHN_TILT_DEFAULT_SENSITIVITY;
+    relay_chn_tilt_compute_set_sensitivity(tilt_ctl, sensitivity);
-    tilt_ctl->tilt_timing.move_time_ms = RELAY_CHN_TILT_DEFAULT_RUN_MS;
+    // Init tilt counters
-    tilt_ctl->tilt_timing.pause_time_ms = RELAY_CHN_TILT_DEFAULT_PAUSE_MS;
+    tilt_ctl->tilt_counter.tilt_forward_count = tilt_counter->tilt_forward_count;
-    relay_chn_tilt_reset_count(tilt_ctl);
+    tilt_ctl->tilt_counter.tilt_reverse_count = tilt_counter->tilt_reverse_count;
 
     tilt_ctl->chn_ctl = chn_ctl;
-    tilt_ctl->chn_ctl->tilt_ctl = tilt_ctl; // 
+    tilt_ctl->chn_ctl->tilt_ctl = tilt_ctl;
     
     // Create tilt timer for the channel
     char timer_name[32];
@@ -591,17 +675,50 @@ esp_err_t relay_chn_tilt_ctl_init(relay_chn_tilt_ctl_t *tilt_ctl, relay_chn_ctl_
         .arg = tilt_ctl,
         .name = timer_name
     };
-    return esp_timer_create(&timer_args, &tilt_ctl->tilt_timer);
+    esp_err_t ret = esp_timer_create(&timer_args, &tilt_ctl->tilt_timer);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to create tilt timer for channel %d", chn_ctl->id);
+
+#if RELAY_CHN_ENABLE_NVS == 1
+    // Create flush timer for the tilt counters
+    snprintf(timer_name, sizeof(timer_name), "relay_chn_%2d_tilt_flush_timer", chn_ctl->id);
+    timer_args.callback = relay_chn_tilt_flush_timer_cb;
+    timer_args.name = timer_name;
+    ret = esp_timer_create(&timer_args, &tilt_ctl->flush_timer);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to create tilt flush timer for channel %d", chn_ctl->id);
+#endif
+    return ESP_OK;
 }
 
 esp_err_t relay_chn_tilt_init(relay_chn_ctl_t *chn_ctls)
 {
+    uint8_t sensitivity;
+    relay_chn_tilt_counter_t tilt_counter;
+    
 #if RELAY_CHN_COUNT > 1
     for (int i = 0; i < RELAY_CHN_COUNT; i++) {
-        relay_chn_tilt_ctl_init(&tilt_ctls[i], &chn_ctls[i]);
+#if RELAY_CHN_ENABLE_NVS == 1
-    }
+        esp_err_t ret = relay_chn_tilt_load_sensitivity(i, &sensitivity);
+        ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt sensitivity for channel %d", i);
+        ret = relay_chn_tilt_load_tilt_counter(i, &tilt_counter);
+        ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt counters for channel %d", i);
 #else
-    relay_chn_tilt_ctl_init(&tilt_ctl, chn_ctls);
+        sensitivity = RELAY_CHN_TILT_DEFAULT_SENSITIVITY;
+        tilt_counter.tilt_forward_count = 0;
+        tilt_counter.tilt_reverse_count = 0;
+#endif // RELAY_CHN_ENABLE_NVS == 1
+relay_chn_tilt_ctl_init(&tilt_ctls[i], &chn_ctls[i], &tilt_counter, sensitivity);
+}
+#else
+    sensitivity = RELAY_CHN_TILT_DEFAULT_SENSITIVITY;
+    tilt_counter.tilt_forward_count = 0;
+    tilt_counter.tilt_reverse_count = 0;
+#if RELAY_CHN_ENABLE_NVS == 1
+    esp_err_t ret = relay_chn_tilt_load_sensitivity(0, &sensitivity);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt sensitivity for channel %d", 0);
+    ret = relay_chn_tilt_load_tilt_counter(0, &tilt_counter);
+    ESP_RETURN_ON_ERROR(ret, TAG, "Failed to load tilt counters for channel %d", 0);
+#endif // RELAY_CHN_ENABLE_NVS == 1
+    relay_chn_tilt_ctl_init(&tilt_ctl, chn_ctls, &tilt_counter, sensitivity);
 #endif // RELAY_CHN_COUNT > 1
 
     return esp_event_handler_register_with(relay_chn_event_loop, 
@@ -616,6 +733,12 @@ void relay_chn_tilt_ctl_deinit(relay_chn_tilt_ctl_t *tilt_ctl)
         esp_timer_delete(tilt_ctl->tilt_timer);
         tilt_ctl->tilt_timer = NULL;
     }
+#if RELAY_CHN_ENABLE_NVS == 1
+    if (tilt_ctl->flush_timer != NULL) {
+        esp_timer_delete(tilt_ctl->flush_timer);
+        tilt_ctl->flush_timer = NULL;
+    }
+#endif // RELAY_CHN_ENABLE_NVS == 1
 }
 
 void relay_chn_tilt_deinit()