Nonin Serial Protocol 1

Nonin SERIAL DATA FORMAT #1: http://tinyurl.com/noninformat1
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1) Serial format 9600, n, 8, 1

2) Rate Sends 3 bytes of data once a second.

3) Data:

    1st byte = Status Byte
     BIT 7 = ALWAYS SET TO "1"
     BIT 6 = SENSOR DISCONNECTED, SET IF TRUE
     BIT 5 = OUT OF TRACK, SET IF TRUE
     BIT 4 = LOW PERFUSION, SET IF TRUE
     BIT 3 = MARGINAL PERFUSION, SET IF TRUE
     BIT 2 = BAD PULSE, SET IF TRUE
     BIT 1 = HEART RATE BIT 8
     BIT 0 = HEART RATE BIT 7

    2nd byte = Heart Rate (511 = bad data): 9-bits of reslution
     BIT "7" IS ALWAYS SET TO "0".
     HEART RATE DATA = BITS 0 - 6,  PLUS BITS 0 & 1 OF THE STATUS BYTE TO PROVIDE 9 BITS OF RESOLUTION.

    3rd byte = SpO2 (127 = bad data)