diff --git a/extlibs/libespfs b/extlibs/libespfs
index 03ff681..a646e3e 160000
--- a/extlibs/libespfs
+++ b/extlibs/libespfs
@@ -1 +1 @@
-Subproject commit 03ff681a61cb03a43c6f008601a6e6090e9df2bd
+Subproject commit a646e3ee0594ec2301e9b3fe6373ea274eb39e39
diff --git a/include/NetTransport.h b/include/NetTransport.h
index fa33f83..7919eb8 100644
--- a/include/NetTransport.h
+++ b/include/NetTransport.h
@@ -71,7 +71,7 @@ void PPPModemStart(void);
 
 void PPPModemGetRSSI(void);
 void ModemSendSMS(void);
-void ModemSendAT(char *cmd);
+void ModemSendAT(char *cmd, char *resp, int timeout);
 
 void MQTTRun(void);
 
diff --git a/src/GSMTransport.c b/src/GSMTransport.c
index 3c47531..ffb3aaf 100644
--- a/src/GSMTransport.c
+++ b/src/GSMTransport.c
@@ -298,10 +298,10 @@ void PPPModemGetRSSI(void)
     ESP_LOGW(TAG, "Signal %d, ber %d", rssi, ber);
 }
 
-void ModemSendAT(char *cmd)
+void ModemSendAT(char *cmd, char *resp, int timeout)
 {
-    char resp[128] = {0};
-    esp_modem_at(dce, cmd, resp, 5000);
+    esp_modem_at(dce, cmd, resp, timeout);
+    ESP_LOGI(TAG, "Command:%s", cmd);
     ESP_LOGW(TAG, "%s", resp);
 }
 
diff --git a/src/HTTPPostSystem.c b/src/HTTPPostSystem.c
index cbfba18..da9d99b 100644
--- a/src/HTTPPostSystem.c
+++ b/src/HTTPPostSystem.c
@@ -516,22 +516,26 @@ static HTTP_IO_RESULT HTTPPostSystemSettings(httpd_req_t *req, char *PostData)
     {
         if (!strcmp(tmp, (const char*) "1"))
         {
+
             return HTTP_IO_DONE_NOREFRESH;
         }
 #if CONFIG_WEBGUIAPP_GPRS_ENABLE
         else if (!strcmp(tmp, (const char*) "2"))
         {
-            ModemSendAT("AT+CCLK?\r");
+            char resp[256] = {0};
+            ModemSendAT("AT+CCLK?\r", resp, 200);
             return HTTP_IO_DONE_NOREFRESH;
         }
         else if (!strcmp(tmp, (const char*) "3"))
         {
-            ModemSendAT("ATD+79022518532;\r");
+            char resp[256] = {0};
+            ModemSendAT("ATD+79022518532;\r", resp, 200);
             return HTTP_IO_DONE_NOREFRESH;
         }
         else if (!strcmp(tmp, (const char*) "4"))
         {
-            ModemSendAT("ATH\r");
+            char resp[256] = {0};
+            ModemSendAT("ATH\r", resp, 200);
             return HTTP_IO_DONE_NOREFRESH;
         }
 #endif
diff --git a/src/LoRaWAN.c b/src/LoRaWAN.c
index 744ee13..0baef4a 100644
--- a/src/LoRaWAN.c
+++ b/src/LoRaWAN.c
@@ -67,6 +67,7 @@ esp_err_t LORASendData(LORA_DATA_SEND_STRUCT *pdss)
     char *ptr = (char*) malloc(MESSAGE_LENGTH);
     if (ptr)
     {
+        ESP_LOGW(TAG, "memory allocate %d byte", MESSAGE_LENGTH);
         memcpy(ptr, pdss->raw_data_ptr, MESSAGE_LENGTH);
         LORA_DATA_SEND_STRUCT DSS;
         DSS.raw_data_ptr = ptr;
@@ -77,6 +78,7 @@ esp_err_t LORASendData(LORA_DATA_SEND_STRUCT *pdss)
         else
         {
             free(ptr);
+            ESP_LOGW(TAG, "memory free (queue full) %d byte", MESSAGE_LENGTH);
             return ESP_ERR_TIMEOUT;
         }
     }
@@ -120,6 +122,7 @@ void LoRaWANTransportTask(void *pvParameter)
 #endif
             ttn_transmit_message((const uint8_t*) DSS.raw_data_ptr, MESSAGE_LENGTH, 1, true);
             free(DSS.raw_data_ptr);
+            ESP_LOGW(TAG, "memory free (transmitted) %d byte", MESSAGE_LENGTH);
         }
         else
         {