diff --git a/src/ThingerClient.h b/src/ThingerClient.h
index 6c2e081..aaa5bea 100644
--- a/src/ThingerClient.h
+++ b/src/ThingerClient.h
@@ -135,6 +135,7 @@ class ThingerClient : public thinger::thinger {
              * Without a small delays between readings, the MKRGSM1400 seems to miss information, i.e, reading a byte
              * after a byte. Maybe it is related to UART communication.
              */
+            delay(50);
 #ifdef ARDUINO_SAMD_MKRGSM1400
             delay(2);
 #endif
@@ -567,4 +568,4 @@ inline bool inputResource<String>(pson& in, String& value){
                                           inputValue_2(__VA_ARGS__),\
                                           inputValue_1(__VA_ARGS__)\
                                     )
-#endif
\ No newline at end of file
+#endif
diff --git a/src/ThingerSmartConfig.h b/src/ThingerSmartConfig.h
index 88abbd6..0d907fd 100644
--- a/src/ThingerSmartConfig.h
+++ b/src/ThingerSmartConfig.h
@@ -61,6 +61,12 @@ class ThingerSmartConfig : public ThingerClient {
         // try to connect to the last known Wifi Network
         if(WiFi.SSID()!=NULL){
             THINGER_DEBUG_VALUE("NETWORK", "Trying to connect to the last known network: ", WiFi.SSID());
+
+            // Modes that fix Fatal exception 28(LoadProhibitedCause)  (https://github.com/thinger-io/Arduino-Library/issues/28)
+            WiFi.persistent(false);
+            WiFi.mode(WIFI_OFF);
+            WiFi.mode(WIFI_STA);
+
             unsigned long wifi_timeout = millis();
             WiFi.begin(WiFi.SSID().c_str(), WiFi.psk().c_str());
             while(WiFi.status() != WL_CONNECTED && (millis() - wifi_timeout < WIFI_CONNECTION_TIMEOUT_MS)) {
@@ -77,6 +83,9 @@ class ThingerSmartConfig : public ThingerClient {
         if(WiFi.status() != WL_CONNECTED){
             unsigned long wifi_timeout = millis();
             THINGER_DEBUG("NETWORK", "Waiting Smart Config...");
+            WiFi.persistent(false);
+            WiFi.mode(WIFI_OFF);
+            WiFi.mode(WIFI_STA);
             WiFi.stopSmartConfig();
             WiFi.beginSmartConfig();
             while(!WiFi.smartConfigDone()) {
@@ -136,4 +145,4 @@ class ThingerSmartConfig : public ThingerClient {
 #endif
 };
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/thinger/thinger.h b/src/thinger/thinger.h
index 04be395..19fc67b 100644
--- a/src/thinger/thinger.h
+++ b/src/thinger/thinger.h
@@ -258,7 +258,7 @@ namespace thinger{
          * @param data data to write defined in a pson structure
          * @return
          */
-        bool write_bucket(const char* bucket_id, pson& data, bool confirm_write=false){
+        bool write_bucket(const char* bucket_id, pson& data, bool confirm_write=true){
             thinger_message message;
             message.set_signal_flag(thinger_message::BUCKET_DATA);
             message.set_identifier(bucket_id);
@@ -272,7 +272,7 @@ namespace thinger{
          * @param resource_name resource defined in the code, i.e., thing["location"]
          * @return
          */
-        bool write_bucket(const char* bucket_id, thinger_resource& resource, bool confirm_write=false){
+        bool write_bucket(const char* bucket_id, thinger_resource& resource, bool confirm_write=true){
             thinger_message message;
             message.set_signal_flag(thinger_message::BUCKET_DATA);
             message.set_identifier(bucket_id);
@@ -286,7 +286,7 @@ namespace thinger{
          * @param resource_name resource identifier defined in the code, i.e, "location"
          * @return
          */
-        bool write_bucket(const char* bucket_id, const char* resource_name, bool confirm_write=false){
+        bool write_bucket(const char* bucket_id, const char* resource_name, bool confirm_write=true){
             return write_bucket(bucket_id, resources_[resource_name], confirm_write);
         }
 
@@ -589,4 +589,4 @@ namespace thinger{
     };
 }
 
-#endif
\ No newline at end of file
+#endif