1/*
2Writes binary data to the serial port. This data is sent as a byte or series of bytes; to send the characters representing the digits of a number use the print() function instead.
3
4Syntax
5Serial.write(val)
6Serial.write(str)
7Serial.write(buf, len)
8
9Parameters
10Serial: serial port object.
11val: a value to send as a single byte.
12str: a string to send as a series of bytes.
13buf: an array to send as a series of bytes.
14len: the number of bytes to be sent from the array.
15*/