diff --git a/.travis.yml b/.travis.yml
index e280d86f..c9351a50 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -68,9 +68,10 @@ install:
     #
     # Libraries from PlatformIO Library Registry:
     #
-    # http://platformio.org/#!/lib/show/416/TinyGPS
-    # http://platformio.org/#!/lib/show/417/SPI4Teensy3
-    - platformio lib install 416 417
+    # http://platformio.org/lib/show/62/MIDI
+    # http://platformio.org/lib/show/416/TinyGPS
+    # http://platformio.org/lib/show/417/SPI4Teensy3
+    - platformio lib install 62 416 417
 
 script:
     - platformio ci --board=uno --board=teensy31 --board=due --lib="."
diff --git a/examples/USBH_MIDI/USBH_MIDI_dump/USBH_MIDI_dump.ino b/examples/USBH_MIDI/USBH_MIDI_dump/USBH_MIDI_dump.ino
index b2a1a43f..68d3472d 100644
--- a/examples/USBH_MIDI/USBH_MIDI_dump/USBH_MIDI_dump.ino
+++ b/examples/USBH_MIDI/USBH_MIDI_dump/USBH_MIDI_dump.ino
@@ -43,10 +43,10 @@ void setup()
 
 void loop()
 {
-  unsigned long t1;
+  //unsigned long t1;
 
   Usb.Task();
-  t1 = micros();
+  //t1 = micros();
   if ( Usb.getUsbTaskState() == USB_STATE_RUNNING )
   {
     MIDI_poll();
@@ -69,7 +69,7 @@ void MIDI_poll()
     pid = Midi.pid;
   }
   if (Midi.RecvData( &rcvd,  bufMidi) == 0 ) {
-    sprintf(buf, "%08X: ", millis());
+    sprintf(buf, "%08lX: ", millis());
     Serial.print(buf);
     Serial.print(rcvd);
     Serial.print(':');
diff --git a/examples/USBH_MIDI/USB_MIDI_converter/USB_MIDI_converter.ino b/examples/USBH_MIDI/USB_MIDI_converter/USB_MIDI_converter.ino
index c8fb4172..589fe20d 100644
--- a/examples/USBH_MIDI/USB_MIDI_converter/USB_MIDI_converter.ino
+++ b/examples/USBH_MIDI/USB_MIDI_converter/USB_MIDI_converter.ino
@@ -81,7 +81,7 @@ void doDelay(unsigned long t1, unsigned long t2, unsigned long delayTime)
   unsigned long t3;
 
   if ( t1 > t2 ) {
-    t3 = (4294967295 - t1 + t2);
+    t3 = (0xFFFFFFFF - t1 + t2);
   } else {
     t3 = t2 - t1;
   }
diff --git a/examples/USBH_MIDI/USB_MIDI_converter_multi/USB_MIDI_converter_multi.ino b/examples/USBH_MIDI/USB_MIDI_converter_multi/USB_MIDI_converter_multi.ino
index bbc8bf0b..ffed71ab 100644
--- a/examples/USBH_MIDI/USB_MIDI_converter_multi/USB_MIDI_converter_multi.ino
+++ b/examples/USBH_MIDI/USB_MIDI_converter_multi/USB_MIDI_converter_multi.ino
@@ -89,7 +89,7 @@ void doDelay(unsigned long t1, unsigned long t2, unsigned long delayTime)
   unsigned long t3;
 
   if ( t1 > t2 ) {
-    t3 = (4294967295 - t1 + t2);
+    t3 = (0xFFFFFFFF - t1 + t2);
   } else {
     t3 = t2 - t1;
   }
diff --git a/examples/USBH_MIDI/bidrectional_converter/bidrectional_converter.ino b/examples/USBH_MIDI/bidrectional_converter/bidrectional_converter.ino
index 4a45bc79..f681cfb9 100644
--- a/examples/USBH_MIDI/bidrectional_converter/bidrectional_converter.ino
+++ b/examples/USBH_MIDI/bidrectional_converter/bidrectional_converter.ino
@@ -99,7 +99,7 @@ void doDelay(unsigned long t1, unsigned long t2, unsigned long delayTime)
   unsigned long t3;
 
   if ( t1 > t2 ) {
-    t3 = (4294967295 - t1 + t2);
+    t3 = (0xFFFFFFFF - t1 + t2);
   } else {
     t3 = t2 - t1;
   }
diff --git a/examples/USBH_MIDI/eVY1_sample/eVY1_sample.ino b/examples/USBH_MIDI/eVY1_sample/eVY1_sample.ino
index c5984d2b..2d42c3d9 100644
--- a/examples/USBH_MIDI/eVY1_sample/eVY1_sample.ino
+++ b/examples/USBH_MIDI/eVY1_sample/eVY1_sample.ino
@@ -69,7 +69,7 @@ void MIDI_poll()
     Midi.SendSysEx(exdata, sizeof(exdata));
     delay(500);
   }
-  uint8_t size = Midi.RecvData(inBuf);
+  Midi.RecvData(inBuf);
 }
 
 //note On