diff --git a/cores/esp8266/Esp.cpp b/cores/esp8266/Esp.cpp
index 627fdcf2c..bf012afd5 100644
--- a/cores/esp8266/Esp.cpp
+++ b/cores/esp8266/Esp.cpp
@@ -294,3 +294,25 @@ String EspClass::getResetInfo(void) {
 struct rst_info * EspClass::getResetInfoPtr(void) {
     return &resetInfo;
 }
+
+bool EspClass::eraseESPconfig(void) {
+    bool ret = true;
+    size_t cfgAddr = (ESP.getFlashChipSize() - 0x3000);
+    size_t cfgSize = (8*1024);
+
+    noInterrupts();
+    while(cfgSize) {
+
+        if(spi_flash_erase_sector((cfgAddr / SPI_FLASH_SEC_SIZE)) != SPI_FLASH_RESULT_OK) {
+            ret = false;
+        }
+
+        cfgSize -= SPI_FLASH_SEC_SIZE;
+        cfgAddr += SPI_FLASH_SEC_SIZE;
+    }
+    interrupts();
+
+    return ret;
+}
+
+
diff --git a/cores/esp8266/Esp.h b/cores/esp8266/Esp.h
index ccefa0c5f..9411dc5f0 100644
--- a/cores/esp8266/Esp.h
+++ b/cores/esp8266/Esp.h
@@ -101,6 +101,8 @@ class EspClass {
         String getResetInfo(void);
         struct rst_info * getResetInfoPtr(void);
 
+        bool eraseESPconfig(void);
+
         inline uint32_t getCycleCount(void);
 };
 
diff --git a/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp b/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
index e32f426f2..7161c399c 100644
--- a/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
+++ b/libraries/ESP8266WiFi/src/ESP8266WiFiMulti.cpp
@@ -47,6 +47,10 @@ wl_status_t ESP8266WiFiMulti::run(void) {
         uint8 bestBSSID[6];
         int32_t bestChannel;
 
+        DEBUG_WIFI_MULTI("[WIFI] delete old wifi config...\n");
+        WiFi.disconnect();
+
+        DEBUG_WIFI_MULTI("[WIFI] start scan\n");
         // WiFi.scanNetworks will return the number of networks found
         int8_t n = WiFi.scanNetworks();