To save the data, Parallax Data Acquisition (PLX-DAQ) has been used with the help of Microsoft Excel. As some blind persons were computer literate, they can save the heart rate by their own. Before start, download PLX-DAQ and enable Active X and Macro on Microsoft Excel. Then put the following code in the Arduino IDE; i. Serial.println("CLEARDATA"); This line required to clears sheet starting from row 2. ii. Serial.println("CLEARSHEET"); This line has to clears sheet starting from row 1. iii. Serial.println("LABEL,Date,Time,Heart Beat,millis"); It defines four columns named "Date", "Time", "Timer", "Heart Beat" and "millis". This part can be edited according to the data obtained. iv. Serial.println( (String) "DATA,DATE,TIME," + myBPM + "," + millis() + ",AUTOSCROLL" ); Getting the data from the sensor to be included in the Excel. v. Serial.println("CELL...