diff --git a/CMakeLists.txt b/CMakeLists.txt
index 11653e5..485cc7b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ set(SRCS "src/configulator.c")
 
 if(${ESP_PLATFORM})
   list(APPEND REQUIRES nvs_flash)
-  list(APPEND SRCS "src/cfglr_nvs.c")
+  list(APPEND SRCS src/cfglr_nvs.c src/cfglr_signal_idf_event.c)
 endif()
 
 idf_component_register(
diff --git a/include/cfglr_log.h b/include/cfglr_log.h
index 5a3defd..7457f54 100644
--- a/include/cfglr_log.h
+++ b/include/cfglr_log.h
@@ -6,9 +6,11 @@
 #include "cfglr_nvs.h"
 
 #define CFGLR_LOGI(TAG, STR, ...) ESP_LOGI(TAG, STR, ##__VA_ARGS__)
+#define CFGLR_LOGD(TAG, STR, ...) ESP_LOGD(TAG, STR, ##__VA_ARGS__)
 
 #else
 #define CFGLR_LOGI(TAG, STR, ...) print(TAG); printf(STR, ##__VA_ARGS__);
+#define CFGLR_LOGD(TAG, STR, ...) print(TAG); printf(STR, ##__VA_ARGS__);
 #endif
 
 #endif
diff --git a/include/cfglr_nvs.h b/include/cfglr_nvs.h
index 1772812..8e6e07d 100644
--- a/include/cfglr_nvs.h
+++ b/include/cfglr_nvs.h
@@ -6,8 +6,10 @@
 
 void cfglr_backend_nvs_open(cfglr_backend_t *backend, cfglr_handle_t *handle);
 void cfglr_backend_nvs_close(cfglr_backend_t *backend, cfglr_handle_t *handle);
+uint16_t cfglr_backend_nvs_get(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
+uint16_t cfglr_backend_nvs_set(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
 
-#define CFGLR_BACKEND_NVS() CFGLR_BACKEND(&cfglr_backend_nvs_open, &cfglr_backend_nvs_close) 
+#define CFGLR_BACKEND_NVS() CFGLR_BACKEND(&cfglr_backend_nvs_open, &cfglr_backend_nvs_close, &cfglr_backend_nvs_get, cfglr_backend_nvs_set)
 
 #endif
 #endif
diff --git a/include/cfglr_signaler_idf_event.h b/include/cfglr_signaler_idf_event.h
new file mode 100644
index 0000000..30faadc
--- /dev/null
+++ b/include/cfglr_signaler_idf_event.h
@@ -0,0 +1,13 @@
+#ifndef __IDF_EVENT_H__
+#define __IDF_EVENT_H__
+
+#include "configulator.h"
+
+uint8_t cfglr_signaler_idf_init(cfglr_signaler_t *signaler, cfglr_handle_t *handle);
+uint8_t cfglr_signaler_idf_dispatch(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig);
+
+#define CFGLR_SIGNALER_IDF_EVENT() {\
+  .dispatch = &cfglr_signaler_idf_dispatch,\
+}
+
+#endif
diff --git a/include/configulator.h b/include/configulator.h
index 33b27c1..398317d 100644
--- a/include/configulator.h
+++ b/include/configulator.h
@@ -5,9 +5,16 @@
 
 #define CFGLR_BACKENDS_MAX  (04)
 #define CFGLR_ELEMENTS_MAX  (04)
+#define CFGLR_SIGNALERS_MAX (04)
 
 typedef enum {
-  CFGLR_DATATYPE_U8,
+  CFGLR_SIGNAL_LOADED = 0,
+  CFGLR_SIGNAL_CHANGE,
+  CFGLR_SIGNAL_DELETE,
+} cfglr_signal_e;
+
+typedef enum {
+  CFGLR_DATATYPE_U8 = 0,
   CFGLR_DATATYPE_I8,
   CFGLR_DATATYPE_U16,
   CFGLR_DATATYPE_I16,
@@ -19,53 +26,74 @@ typedef enum {
   CFGLR_DATATYPE_BIN,
 } cfglr_datatype_e;
 
-typedef void (*cfglr_read_callback)(const char *key, void *out);
-typedef void (*cfglr_write_callback)(const char *key, void *valoue, uint8_t length);
-
-typedef struct {
-  cfglr_read_callback read;
-  cfglr_write_callback write;
-} cfglr_data_handler_t;
+#define CFGLR_DATATYPE_COUNT (uint8_t)(CFGLR_DATATYPE_BIN - CFGLR_DATATYPE_U8)
 
 typedef struct {
   const char *key;
   uint8_t dirty;
   cfglr_datatype_e datatype;
-  void *default_data;
+  uint8_t datatype_size;
   void *data;
+  void *default_data;
 } cfglr_element_t;
 
-#define CFGLR_ELEMENT(KEY, TYPE, DEFAULT) (cfglr_element_t){\
+typedef struct cfglr_signaler cfglr_signaler_t;
+typedef struct cfglr_handle_struct cfglr_handle_t;
+
+typedef void (*cfglr_signaler_init_t)(cfglr_signaler_t *signaler, cfglr_handle_t *handle);
+typedef void (*cfglr_signaler_dispatch_t)(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig);
+
+struct cfglr_signaler {
+  cfglr_signaler_dispatch_t dispatch;
+  cfglr_signaler_init_t init;
+  void *handle;
+};
+
+#define CFGLR_ELEMENT(KEY, TYPE, DEFAULT, SIZE) (cfglr_element_t){\
   .key = KEY,\
   .dirty = 1,\
+  .datatype = TYPE,\
+  .datatype_size = SIZE,\
   .default_data = (void*)DEFAULT,\
-  .datatype = TYPE\
 }
 
-#define CFGLR_ELEMENT_U8(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_U8, DEFAULT)
+#define CFGLR_ELEMENT_U8(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_U8, DEFAULT, sizeof(uint8_t))
+#define CFGLR_ELEMENT_I8(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_I8, DEFAULT, sizeof(int8_t))
+
+#define CFGLR_ELEMENT_U64(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_U64, DEFAULT, sizeof(uint64_t))
+#define CFGLR_ELEMENT_I64(KEY, DEFAULT) CFGLR_ELEMENT(KEY, CFGLR_DATATYPE_I64, DEFAULT, sizeof(int64_t))
 
 typedef struct cfglr_backend cfglr_backend_t;
-typedef struct cfglr_handle_struct cfglr_handle_t;
 
 typedef void (*cfglr_backend_open_t)(cfglr_backend_t *backend, cfglr_handle_t *handle);
 typedef void (*cfglr_backend_close_t)(cfglr_backend_t *backend, cfglr_handle_t *handle);
-typedef void (*cfglr_backend_get_t)(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
+typedef uint16_t (*cfglr_backend_get_t)(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
+typedef uint16_t (*cfglr_backend_set_t)(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
+
+uint16_t cfglr_commit_data(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle);
 
 struct cfglr_backend {
   cfglr_backend_open_t open;
   cfglr_backend_close_t close;
   cfglr_backend_get_t get;
+  cfglr_backend_set_t set;
   void *handle;
 };
 
-#define CFGLR_BACKEND(OPEN, CLOSE) {\
+#define CFGLR_BACKEND(OPEN, CLOSE, GET, SET) {\
   .open = OPEN,\
   .close = CLOSE,\
+  .get = GET,\
+  .set = SET,\
 }
 
 struct cfglr_handle_struct {
   const char *namespace;
-  uint8_t store_defaults;
+  uint8_t store_default;
+  uint8_t backend_count;
+  uint8_t element_count;
+  uint8_t signaler_count;
+  cfglr_signaler_t signalers[CFGLR_SIGNALERS_MAX];
   cfglr_backend_t backends[CFGLR_BACKENDS_MAX];
   cfglr_element_t elements[CFGLR_ELEMENTS_MAX];
 };
@@ -74,5 +102,6 @@ uint8_t cfglr_init(cfglr_handle_t *handle);
 uint8_t cfglr_fetch_data(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handler);
 
 #include "cfglr_nvs.h"
+#include "cfglr_signaler_idf_event.h"
 
 #endif//__CONFIGULATOR_H__
diff --git a/src/cfglr_nvs.c b/src/cfglr_nvs.c
index 298bda7..e9cfd11 100644
--- a/src/cfglr_nvs.c
+++ b/src/cfglr_nvs.c
@@ -9,3 +9,112 @@ void cfglr_backend_nvs_open(cfglr_backend_t *backend, cfglr_handle_t *handle) {
 
 void cfglr_backend_nvs_close(cfglr_backend_t *backend, cfglr_handle_t *handle) {
 }
+
+
+uint16_t cfglr_backend_nvs_get(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle) {
+  esp_err_t err = ESP_OK;
+
+  if(element->datatype <= CFGLR_DATATYPE_I32) {
+    switch(element->datatype) {
+      case CFGLR_DATATYPE_U8:
+        err = nvs_get_u8((nvs_handle_t)backend->handle, element->key, (uint8_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_I8:
+        err = nvs_get_i8((nvs_handle_t)backend->handle, element->key, (int8_t*)element->data);
+      break;
+
+      /*
+      case CFGLR_DATATYPE_U16:
+        err = nvs_get_u16((nvs_handle_t)backend->handle, element->key, (uint16_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_I16:
+        err = nvs_get_i16((nvs_handle_t)backend->handle, element->key, (int16_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_U32:
+        err = nvs_get_u32((nvs_handle_t)backend->handle, element->key, (uint32_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_I32:
+        err = nvs_get_i32((nvs_handle_t)backend->handle, element->key, (int32_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_U64:
+        err = nvs_get_u64((nvs_handle_t)backend->handle, element->key, (uint64_t*)element->data);
+      break;
+
+      case CFGLR_DATATYPE_I64:
+        err = nvs_get_i64((nvs_handle_t)backend->handle, element->key, (int64_t*)element->data);
+      break;
+      */
+
+      default:
+        CFGLR_LOGI(TAG, "unhandlable datatype: %d", element->datatype);
+    }
+
+    if(err == ESP_ERR_NVS_NOT_FOUND) {
+    } else if(err != ESP_OK) {
+      ESP_ERROR_CHECK(err);
+    } else if(err == ESP_OK) {
+      element->dirty = 0;
+    }
+  } else {
+    // handle [UI]64, STR and BIN datatype
+  }
+
+  return err;
+}
+
+uint16_t cfglr_backend_nvs_set(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle) {
+  esp_err_t err = ESP_OK;
+
+  switch(element->datatype) {
+    case CFGLR_DATATYPE_U8:
+      err = nvs_set_u8((nvs_handle_t)backend->handle, element->key, (uint8_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_I8:
+      err = nvs_set_i8((nvs_handle_t)backend->handle, element->key, (int8_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_U16:
+      err = nvs_set_u16((nvs_handle_t)backend->handle, element->key, (uint16_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_I16:
+      err = nvs_set_i16((nvs_handle_t)backend->handle, element->key, (int16_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_U32:
+      err = nvs_set_u32((nvs_handle_t)backend->handle, element->key, (uint32_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_I32:
+      err = nvs_set_i32((nvs_handle_t)backend->handle, element->key, (int32_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_U64:
+      err = nvs_set_u64((nvs_handle_t)backend->handle, element->key, (uint64_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_I64:
+      err = nvs_set_i64((nvs_handle_t)backend->handle, element->key, (int64_t)element->data);
+    break;
+
+    case CFGLR_DATATYPE_STR:
+    case CFGLR_DATATYPE_BIN:
+      // determine length
+      // fetch data by length
+    break;
+
+    default:
+      CFGLR_LOGI(TAG, "unhandlable datatype: %d", element->datatype);
+  }
+
+  if(err == ESP_OK) {
+  }
+
+  return err;
+}
diff --git a/src/cfglr_signal_idf_event.c b/src/cfglr_signal_idf_event.c
new file mode 100644
index 0000000..3b116c2
--- /dev/null
+++ b/src/cfglr_signal_idf_event.c
@@ -0,0 +1,10 @@
+#include "cfglr_log.h"
+#include "cfglr_signaler_idf_event.h"
+
+#define TAG "CFGLR_SIG_IDF"
+
+uint8_t cfglr_signaler_idf_dispatch(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig) {
+  CFGLR_LOGI(TAG, "Dispatch!: %d", sig);
+
+  return 0;
+}
diff --git a/src/configulator.c b/src/configulator.c
index fd1fcd8..0dcf798 100644
--- a/src/configulator.c
+++ b/src/configulator.c
@@ -1,3 +1,4 @@
+#include "string.h"
 #include "configulator.h"
 #include "cfglr_log.h"
 
@@ -7,25 +8,74 @@ uint8_t cfglr_init(cfglr_handle_t *handle) {
   uint8_t tick = 0;
   cfglr_backend_t *backend;
   cfglr_element_t *element;
+  cfglr_signaler_t *signaler;
+
+  handle->backend_count = 0;
+  handle->element_count = 0;
+
+  CFGLR_LOGI(TAG, "initializing backends");
 
   while((backend = &handle->backends[tick])) {
     if(backend->open == NULL) break;
 
     backend->open(backend, handle);
+    // do error validation
 
+    ++handle->backend_count;
     ++tick;
   }
 
   tick = 0;
 
+  CFGLR_LOGI(TAG, "initializing signalers");
+
+  while((signaler = &handle->signalers[tick])) {
+    if(signaler->dispatch == NULL) break;
+
+    if(signaler->init != NULL) {
+      signaler->init(signaler, handle);
+    }
+
+    ++handle->signaler_count;
+    ++tick;
+  }
+
+  tick = 0;
+
+  CFGLR_LOGI(TAG, "initializing elements");
+
   while((element = &handle->elements[tick])) {
     if(element->key == NULL) break;
 
-    // all elements should start out dirty, =
-    // they should be fetched, or defaulted
-    if(element->dirty) {
-      backend->get(backend, element, handle);
+    CFGLR_LOGD(TAG, "Initializing element: %s", element->key);
+    CFGLR_LOGD(TAG, "size: %d", element->datatype_size);
+    CFGLR_LOGD(TAG, "default: %d", (int)element->default_data);
+
+    element->data = (void*)malloc(element->datatype_size);
+
+    for(uint8_t i = 0; i < handle->backend_count; i++) {
+      if(handle->backends[i].get(&handle->backends[i], element, handle) == 0) {
+        for(uint8_t j = 0; j < handle->signaler_count; j++) {
+          handle->signalers[i].dispatch(&handle->signalers[i], element, CFGLR_SIGNAL_LOADED);
+        }
+      }
     }
+
+    ++handle->element_count;
+    ++tick;
   }
+
   return 0;
 }
+
+uint16_t cfglr_commit_data(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handle) {
+  uint16_t ret = backend->set(backend, element, handle);
+
+  if(ret == 0) {
+    for(uint8_t i = 0; i < handle->signaler_count; i++) {
+      handle->signalers[i].dispatch(&handle->signalers[i], element, CFGLR_SIGNAL_CHANGE);
+    }
+  }
+
+  return ret;
+}