How to decode pulse oximeter output into readable

Issue

Im trying to decode data from pulse oximeter device using the nrf Connect App.

From the Pulse Oximeter(0X1822). PLX Spot-Check Measurement service I got the below response:

SPOT MEASUREMENT:

(0x) 17-61-00-60-00-E1-07-01-01-01-22-13-20-00-20-00-00

CONTINOUS MEASUREMENT: (0x) 0c-62-00-4E-00-20-00-00-00-00

PROFILE SAYS its SFLOAT value, But I'm stuck to converting this to readable value.

Expected value: Spo2 and heart rate from the above response

I also looked in the pulse oximeter profile in the Bluetooth page but it seems confusing

Profile

NRF CONNECT APP SCREENSHOT:

pulse oximeter details:http://www.choicemmed.eu/product_center/253

Please help me to get readable data

Solution

This page helps me lot: https://thejeshgn.com/2020/08/05/reverse-engineering-a-bluetooth-low-energy-oximeter/

From this Spot check value :17-61-00-60-00-E1-07-01-01-01-22-13-20-00-20-00-00

Byte[1] refers to spo2 rate

Byte[3] refers to pulse rate

int spo2 = packet[1]; 
int pulseRate = packet[3] | ((packet[2] & 64) << 1);

System.out.println(spo2);
System.out.println(pulseRate);

Spo2:97 pulse rate:98

This scenarios is same for continuous check value:(0x) 0c-62-00-4E-00-20-00-00-00-00

To convert hex code value into int in dart

int val=0X62;
print(val);

Answered By - tesrt