Smart Blood Pressure Monitor
It should be noted that this device is not designed for clinical applications, however, it is a fun way to learn about pressure sensors and Arduino while creating a functional device applicable to the real world!
Pressure, also called hypertension, is deadly it can lead to heart failure, stroke, and kidney failure.
Parts used for this project:
1.Arduino Uno
char sbuffer[30], ch;
unsigned char pos;
unsigned char read1, read2, read3;
char sys; void setup(){ Serial.begin(115200); // Serial is used for output on PCs "Serial Monitor" Serial1.begin(9600); // Serial1 is used for serial input from connected sensor Serial.println("BP Start reading......");
} char mygetchar(void)
{ //receive serial character from sensor (blocking while nothing received) while (!Serial1.available()); return Serial1.read();
} void loop()
{ ch = mygetchar(); //loop till character received if(ch==0x0A) // if received character is <LF>, 0x0A, 10 then process buffer { pos = 0; // buffer position reset for next reading // extract data from serial buffer to 8 bit integer value // convert data from ASCII to decimal read1 = ((sbuffer[1]-'0')*100) + ((sbuffer[2]-'0')*10) +(sbuffer[3]-'0'); read2 = ((sbuffer[6]-'0')*100) + ((sbuffer[7]-'0')*10) +(sbuffer[8]-'0'); read3 = ((sbuffer[11]-'0')*100) + ((sbuffer[12]-'0')*10) +(sbuffer[13]-'0'); // Do whatever you wish to do with this sensor integer variables // Show on LCD or Do some action as per your application // Value of variables will be between 0-255 // example: send demo output to serial monitor on "Serial" int Sys = (int)(read1); int Dia = (int)(read2); int Pulse = (int)(read3); Serial.print("Sys: "); Serial.println(Sys); Serial.print("Dia: "); Serial.println(Dia); Serial.print("Pulse: "); Serial.println(Pulse); Serial.println("BP: "); Serial.print(Sys); Serial.print("/"); Serial.println(Dia); } else { //store serial data to buffer sbuffer[pos] = ch; pos++; }
}// end loop