bugfix in SerialTransceiver

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

Software/SerialTransceiver/SerialTransceiver.ino

@@ -25,7 +25,7 @@ void setup() {
 
 void loop() {
   if (available485()) Serial.println(get485message());
-  if (Serial.available()) {
+  while (Serial.available()) {
     c = (char)Serial.read();
     if (c == '\n') {
       send485(message.c_str());