단일 문자 수신 // Example 3 - Receive with start- and end-markers const byte numChars = 32; char receivedChars[numChars]; boolean newData = false; void setup() { Serial.begin(9600); Serial.println(""); } void loop() { recvWithStartEndMarkers(); showNewData(); } void recvWithStartEndMarkers() { static boolean recvInProgress = false; static byte ndx = 0; char startMarker = ''; char rc; while (Serial.ava..