diff --git a/src/utility/w5500.cpp b/src/utility/w5500.cpp
index 0e22a07..d5c9342 100644
--- a/src/utility/w5500.cpp
+++ b/src/utility/w5500.cpp
@@ -32,7 +32,7 @@ void W5500Class::init(uint8_t ss_pin)
   delay(1000);
   initSS();
   SPI.begin();
-
+  w5500.swReset();
   for (int i=0; i<MAX_SOCK_NUM; i++) {
     uint8_t cntl_byte = (0x0C + (i<<5));
     write( 0x1E, cntl_byte, 2); //0x1E - Sn_RXBUF_SIZE
diff --git a/src/utility/w5500.h b/src/utility/w5500.h
index 19fa5ad..48c9b42 100644
--- a/src/utility/w5500.h
+++ b/src/utility/w5500.h
@@ -186,6 +186,8 @@ class W5500Class {
   inline void setRetransmissionTime(uint16_t timeout);
   inline void setRetransmissionCount(uint8_t _retry);
 
+  inline void swReset();
+
   inline void setPHYCFGR(uint8_t _val);
   inline uint8_t getPHYCFGR();
 
@@ -411,4 +413,8 @@ uint8_t W5500Class::getPHYCFGR() {
   return read(0x002E, 0x00);
 }
 
+void W5500Class::swReset() {
+  writeMR( (readMR() | 0x80) );
+}
+
 #endif