diff --git a/MikuRelay.cpp b/MikuRelay.cpp
index c355391..f44cc39 100755
--- a/MikuRelay.cpp
+++ b/MikuRelay.cpp
@@ -1,4 +1,4 @@
-#include "MikuDuino.h"
+#include <MikuDuino.h>
 #include "MikuRelay.h"
 
 /*
diff --git a/README.md b/README.md
index 0a8a1e5..dd338f0 100755
--- a/README.md
+++ b/README.md
@@ -41,6 +41,11 @@ sudo ./blink
  +-----+-----+---------+------+---+- BPI-M3 -+---+------+---------+-----+-----+
 </code></pre>
 
+1.(2016-05-30) start & sayhello
+2.(2016-06-02) gpio for M2+,M3 & blink
+3.(2016-06-04) update to C++ & add Relay
+4.(2016-06-05) add Wire & SHT2x 
+
 	git add .
 	git commit -a -m "md"
 	git push origin master
diff --git a/examples/sht2x b/examples/sht2x
new file mode 100755
index 0000000..2a5b84c
Binary files /dev/null and b/examples/sht2x differ
diff --git a/examples/sht2x.cpp b/examples/sht2x.cpp
new file mode 100755
index 0000000..ec64389
--- /dev/null
+++ b/examples/sht2x.cpp
@@ -0,0 +1,27 @@
+/*
+ * sht2x.cpp:
+ *
+ *	Welcome to MikuQ.com! MikuDuino for BananaPi 
+ *	
+ *     by MikuQ(i@mikuq.com) 2016-6-5
+ *	
+ * https://github.com/bpiq/MikuPi
+ *
+ */
+
+#include "MikuDuino.h"
+#include "MikuSHT2x.h"
+
+Miku_SHT2x sht;
+
+void setup()
+{
+  sayHello();
+}
+
+void loop()
+{
+  printf("Humidity(%%RH): %.2f", sht.GetHumidity());
+  printf("     Temperature(C): %.2f\n", sht.GetTemperature());
+  delay(1000);
+}
diff --git a/makefile b/makefile
index 2394785..a3a2fd7 100755
--- a/makefile
+++ b/makefile
@@ -1,4 +1,4 @@
-libMikuDuino.so : MikuPi.cpp MikuDuino.cpp MikuRelay.cpp
+libMikuDuino.so : MikuPi.cpp MikuDuino.cpp MikuRelay.cpp MikuSHT2x.cpp Wire.cpp
 	@gcc $^ -fPIC -shared -o $@
 	@install $@ /usr/lib/
 	@install *.h /usr/include/