commit de8b1d46f07afaf87b853ab52f35ecc8c0076def
Author: Red Forks <redforks@gmail.com>
Date:   Fri Jan 12 10:53:57 2018 +0800

    First commit, serial test

diff --git a/com-test/com-test.ino b/com-test/com-test.ino
new file mode 100644
index 0000000..3c95a32
--- /dev/null
+++ b/com-test/com-test.ino
@@ -0,0 +1,20 @@
+void setup() {
+  // initialize serial communication at 9600 bits per second:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // send data only when you receive data:
+  while (Serial.available() > 0) {
+    // read the incoming byte:
+    int incomingByte = Serial.read();
+
+    Serial.write(incomingByte);
+  }
+
+  static int no = 0;
+  
+  Serial.print("serial port test ");
+  Serial.println(no++);
+  delay(2000);
+}
diff --git a/libraries/readme.txt b/libraries/readme.txt
new file mode 100644
index 0000000..96ce674
--- /dev/null
+++ b/libraries/readme.txt
@@ -0,0 +1 @@
+For information on installing libraries, see: http://www.arduino.cc/en/Guide/Libraries