diff --git a/src/EthernetClient.cpp b/src/EthernetClient.cpp
index e2406d7d..edf007ed 100644
--- a/src/EthernetClient.cpp
+++ b/src/EthernetClient.cpp
@@ -83,7 +83,16 @@ size_t EthernetClient::write(uint8_t b)
 size_t EthernetClient::write(const uint8_t *buf, size_t size)
 {
 	if (sockindex >= MAX_SOCK_NUM) return 0;
-	if (Ethernet.socketSend(sockindex, buf, size)) return size;
+	//if (Ethernet.socketSend(sockindex, buf, size)) return size;
+	if(size==0) return 0;
+	size_t remain = size;
+	size_t sent = 0;
+	while(remain > 0) {
+		sent = Ethernet.socketSend(sockindex, buf+size-remain, remain);
+		if(sent==0) break;
+		remain -= sent;
+	}
+	if(sent!=0) return size;
 	setWriteError();
 	return 0;
 }
diff --git a/src/utility/w5100.h b/src/utility/w5100.h
index 099556a6..13d3c885 100644
--- a/src/utility/w5100.h
+++ b/src/utility/w5100.h
@@ -412,10 +412,12 @@ class W5100Class {
 		pinMode(ss_pin, OUTPUT);
 	}
 	inline static void setSS() {
-		GPOC = ss_pin_mask;
+		//GPOC = ss_pin_mask;
+		digitalWrite(ss_pin, LOW);
 	}
 	inline static void resetSS() {
-		GPOS = ss_pin_mask;
+		//GPOS = ss_pin_mask;
+		digitalWrite(ss_pin, HIGH);
 	}
 
 #elif defined(__SAMD21G18A__)