Hello. I need help with the library of ultrasonic sensor. After instaling the library in arduino libraries none of the examples working. Appears an error with the librarieIn file included from UltrasonicDemo.cpp:12:C:\Users\Pedro\Documents\arduino-1.0\libraries\HCSR04Ultrasonic/Ultrasonic.h:20:22: error: WProgram.h: No such file or directoryI need help please. What can i do?Thanks
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