Maybe a mistake in DigitalInputFirmata.kt, inside DigitalMessage

[Alfrederson]

The way it is now:
val values = (data[1].toInt() ushr 7) or data[2].toInt()
Throws away all the data bits in the first digital message data byte
It should be
val values = data[1].toInt() or (data[2].toInt() shl 7)
Which keeps the 7 bits, and then the LSB of data[2] becomes the MSB of the result

Also:
val port = data[0].toInt() and 0x7F
Will result in the port value being 16 higher than what is should be. Since the port number is just the second nibble of the 0x9_ command, the correct way is
val port = data[0].toInt() and 0x0F

Otherwise the port number and pin states can't be obtained from the data sent by the board.