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--- arduino:arduino_crash_course:misc [2015/02/16 03:48] – mithat
+++ arduino:arduino_crash_course:misc [2015/02/16 04:22] (current) – [Serial communication] mithat
@@ Line 127: / Line 127: @@
 int ANALOG_PIN = 3;  // Maps to A3 we think.
 int val = 0;
-...
 void loop() {
@@ Line 134: / Line 132: @@
 }
 </code>
+----
+===== Serial communication =====
+  * Serial I/O consumes pins 0 (for RX) and 1 (for TX) if used.
+  * [[http://arduino.cc/en/Reference/Serial|Serial reference]]
+==== Serial output ====
+Simple reporting:
+<code c>
+void setup() {
+  Serial.begin(9600);  // init serial communication at 9600 bps
+}
+void loop() {
+  Serial.write(65);           // write a byte (interpreted as ASCII)
+  Serial.print(42);           // print a number
+  Serial.println("Yo.");      // print a string as a line
+  Serial.print(78, HEX);      // print "4E"
+  Serial.println(1.23456, 4); // print "1.2346"
+  Serial.end();               // release pins 0 and 1 for general use
+}
+</code>
+==== Serial output ====
+Later.
+----