add Arduino example

~/C/libserialport/.editorconfig

@@ -2,5 +2,5 @@
 indent_style = space
 indent_size = 4
 
-[*.c]
+[{*.c,*.ino}]
 indent_size = 2

~/C/libserialport/Board/.gitignore

@@ -0,0 +1 @@
+3party/

~/C/libserialport/Board/Board.ino

@@ -0,0 +1,24 @@
+/*
+  Author: Alexander Popov
+  License: Unlicense
+*/
+
+#include "3party/AsyncStream.h"
+AsyncStream<50> serial(&Serial, '\n');
+
+void setup() {
+  Serial.begin(9600);
+}
+
+void loop() {
+  if (strcmp(serial.buf, "ping") == 0) {
+    Serial.println("PONG");
+  }
+
+  Serial.println("ooooo");
+  // delay(1000);
+  Serial.println("zzzz");
+  // delay(1000);
+  Serial.println("xxx");
+  // delay(1000);
+}

~/C/libserialport/Board/README.md

@@ -0,0 +1,3 @@
+Download `AsyncStream.h` from
+https://github.com/GyverLibs/AsyncStream
+and drop in to `3party` folder.

~/C/libserialport/README.md

@@ -14,3 +14,5 @@ export LIBRARY_PATH=<path/to/libserialport/.libs>
 
 gcc -static -Wall -O3 -o <output_filename> <file.c> -lserialport
 ```
+
+Arduino example project store in `Board` folder.