diff --git a/examples/receive_check/receive_check.ino b/examples/receive_check/receive_check.ino
index 78c3deb..4fdda62 100644
--- a/examples/receive_check/receive_check.ino
+++ b/examples/receive_check/receive_check.ino
@@ -42,11 +42,11 @@ void loop()
     {
         CAN.readMsgBuf(&len, buf);    // read data,  len: data length, buf: data buf
 
-        unsigned char canId = CAN.getCanId();
+        unsigned long canId = CAN.getCanId();
         
         Serial.println("-----------------------------");
-        Serial.println("get data from ID: ");
-        Serial.println(canId);
+        Serial.print("get data from ID: ");
+        Serial.println(canId, HEX);
 
         for(int i = 0; i<len; i++)    // print the data
         {