diff --git a/components/BLEh b/components/BLEh
index cb5fe57..544c26f 160000
--- a/components/BLEh
+++ b/components/BLEh
@@ -1 +1 @@
-Subproject commit cb5fe57c53034b9adcb4f89270373156b80153e5
+Subproject commit 544c26fdfda6d679f07192b2358de1cefc998859
diff --git a/main/Alim1000W.c b/main/Alim1000W.c
index 321e1a0..d6b2f6c 100644
--- a/main/Alim1000W.c
+++ b/main/Alim1000W.c
@@ -36,6 +36,9 @@ static uint8_t channel_index[ADC_IN_PIN_NUM];
 static uint32_t meas_res[ADC_IN_PIN_NUM];
 static uint32_t meas_nb[ADC_IN_PIN_NUM];
 
+static uint32_t switching_frequency = CONFIG_SW_FREQ;
+static uint32_t duty_cycle = 50000000;
+
 static bool IRAM_ATTR on_conv_done(adc_continuous_handle_t handle, const adc_continuous_evt_data_t *edata, void *user_data){
   adc_digi_output_data_t* res = (adc_digi_output_data_t*)edata->conv_frame_buffer;
   
@@ -48,6 +51,24 @@ static bool IRAM_ATTR on_conv_done(adc_continuous_handle_t handle, const adc_con
   return false;
 }
 
+void on_char_read_handler(int svc_ind, int chr_ind, void** value, size_t* value_size){
+  ESP_LOGI(TAG, "char read handler");
+  switch(svc_ind){
+    case CONFIGURATION_SVC_ID:
+      switch (chr_ind){
+        case SWITCHING_FREQUENCY_CHR_ID:
+          *value = &switching_frequency;
+          *value_size = sizeof(switching_frequency);
+        break;
+        case DUTY_CYCLE_CHR_ID:
+          *value = &duty_cycle;
+          *value_size = sizeof(duty_cycle);
+        break;
+      }
+    break;
+  }
+}
+
 void app_main(void){
   adc_continuous_handle_cfg_t adc_h_conf = {
     .conv_frame_size = SOC_ADC_DIGI_DATA_BYTES_PER_CONV,
@@ -153,6 +174,8 @@ void app_main(void){
 
   gatt_value_server_handle_t calc_meas_serve_handle = simple_gatt_value_server(calc_meas, sizeof(uint32_t), ADC_IN_PIN_NUM, calc_meas_formats, &gatt_svcs[CALC_VALUES_SVC_ID], CALC_VALUES_SVC_ID, calc_meas_char_uuid);
 
+  add_on_char_read_handler(on_char_read_handler);
+  
   set_gatt_services(gatt_svcs, SVCS_NUM);
 
   initBLE("ALIM");
diff --git a/main/BLE.c b/main/BLE.c
index 9a98fe3..b7b850e 100644
--- a/main/BLE.c
+++ b/main/BLE.c
@@ -1,23 +1,37 @@
 #include "BLE.h"
 #include "BLE_UUID.h"
 
+#include "BLEh.h"
+#include "host/ble_att.h"
 #include "host/ble_gatt.h"
 #include "host/ble_uuid.h"
 
-int gatt_char_access_placeholder(uint16_t conn_handle, uint16_t attr_handle, struct ble_gatt_access_ctxt* ctxt, void* arg){
-  int rc = 0;
 
-  switch(ctxt->op){
-    case BLE_GATT_ACCESS_OP_READ_CHR:
-      ;
-    break;
-    case BLE_GATT_ACCESS_OP_READ_DSC:
-      ;
-    break;
-  }
+struct char_pres_format frequency_char_pres_format = {
+  .format = FORMAT_UINT32,
+  .unit = HERTZ_UNIT_UUID,
+  .exponent = 0,
+  .namespc = 1,
+  .descrH = NSP_DESC_MAIN & 0xff,
+  .descrL = (NSP_DESC_MAIN>>8) & 0xff,
+};
+struct dsc_content switching_frequency_dsc = {
+  .data = &frequency_char_pres_format,
+  .data_size = CHAR_PRESENTATION_FORMAT_SIZE,
+};
 
-  return rc ? BLE_ATT_ERR_INSUFFICIENT_RES : 0;
-}
+struct char_pres_format duty_cycle_char_pres_format = {
+  .format = FORMAT_UINT32,
+  .unit = UNITLESS_UNIT_UUID,
+  .exponent = -6,
+  .namespc = 1,
+  .descrH = NSP_DESC_MAIN & 0xff,
+  .descrL = (NSP_DESC_MAIN>>8) & 0xff,
+};
+struct dsc_content duty_cycle_dsc = {
+  .data = &duty_cycle_char_pres_format,
+  .data_size = CHAR_PRESENTATION_FORMAT_SIZE,
+};
 
 struct ble_gatt_svc_def gatt_svcs[] = {
   [RAW_VALUES_SVC_ID] = {
@@ -32,17 +46,34 @@ struct ble_gatt_svc_def gatt_svcs[] = {
     .type = BLE_GATT_SVC_TYPE_PRIMARY,
     .uuid = BLE_UUID16_DECLARE(CONFIGURATION_SERVICE),
     .characteristics = (struct ble_gatt_chr_def[]){
-      [0] = {
+      [SWITCHING_FREQUENCY_CHR_ID] = {
         .uuid = BLE_UUID16_DECLARE(SWITCHING_FREQUENCY_CHAR),
-        .access_cb = gatt_char_access_placeholder,
+        .access_cb = NULL,
         .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE,
         .min_key_size = 0,
         .arg = NULL,
         .descriptors = (struct ble_gatt_dsc_def[]){
           [0] = {
             .uuid = BLE_UUID16_DECLARE(CHAR_PRES_FORMAT),
-            .att_flags = BLE_GATT_CHR_F_READ,
-            .access_cb = gatt_char_access_placeholder,
+            .att_flags = BLE_ATT_F_READ,
+            .access_cb = NULL,
+            .arg = &switching_frequency_dsc,
+          },
+          { 0 },
+        },
+      },
+      [DUTY_CYCLE_CHR_ID] = {
+        .uuid = BLE_UUID16_DECLARE(DUTY_CYCLE_FREQUENCY_CHAR),
+        .access_cb = NULL,
+        .flags = BLE_GATT_CHR_F_READ | BLE_GATT_CHR_F_WRITE,
+        .min_key_size = 0,
+        .arg = NULL,
+        .descriptors = (struct ble_gatt_dsc_def[]){
+          [0] = {
+            .uuid = BLE_UUID16_DECLARE(CHAR_PRES_FORMAT),
+            .att_flags = BLE_ATT_F_READ,
+            .access_cb = NULL,
+            .arg = &duty_cycle_dsc,
           },
           { 0 },
         },
diff --git a/main/BLE.h b/main/BLE.h
index 1ea79b8..6cf9891 100644
--- a/main/BLE.h
+++ b/main/BLE.h
@@ -1,6 +1,10 @@
 #pragma once
 
+#include "BLE_UUID.h"
 #include "host/ble_gatt.h"
 
 enum {RAW_VALUES_SVC_ID, CALC_VALUES_SVC_ID, CONFIGURATION_SVC_ID, SVCS_NUM};
+
+enum {SWITCHING_FREQUENCY_CHR_ID, DUTY_CYCLE_CHR_ID, CONFIGURATION_SVC_CHR_NUM};
+
 extern struct ble_gatt_svc_def gatt_svcs[SVCS_NUM + 1];
diff --git a/sdkconfig b/sdkconfig
index b2abece..2e5708c 100644
--- a/sdkconfig
+++ b/sdkconfig
@@ -1669,7 +1669,7 @@ CONFIG_PHASE3_CON_PIN=8
 #
 CONFIG_SW_FREQ=800000
 CONFIG_SW_RES=6
-CONFIG_UPD_DELAY=100
+CONFIG_UPD_DELAY=1000
 # end of Controller parameters
 # end of This project config
 # end of Component config
diff --git a/sdkconfig.old b/sdkconfig.old
index 66039ce..6916e95 100644
--- a/sdkconfig.old
+++ b/sdkconfig.old
@@ -408,9 +408,9 @@ CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_INTERNAL=y
 # CONFIG_BT_NIMBLE_LOG_LEVEL_NONE is not set
 # CONFIG_BT_NIMBLE_LOG_LEVEL_ERROR is not set
 # CONFIG_BT_NIMBLE_LOG_LEVEL_WARNING is not set
-# CONFIG_BT_NIMBLE_LOG_LEVEL_INFO is not set
-CONFIG_BT_NIMBLE_LOG_LEVEL_DEBUG=y
-CONFIG_BT_NIMBLE_LOG_LEVEL=0
+CONFIG_BT_NIMBLE_LOG_LEVEL_INFO=y
+# CONFIG_BT_NIMBLE_LOG_LEVEL_DEBUG is not set
+CONFIG_BT_NIMBLE_LOG_LEVEL=1
 CONFIG_BT_NIMBLE_MAX_CONNECTIONS=3
 CONFIG_BT_NIMBLE_MAX_BONDS=3
 CONFIG_BT_NIMBLE_MAX_CCCDS=8