UE4Duino - Arduino to UE4 plugin Release!

[joeycampbell]

Hi I am bringing in a heart rate reading from a polar heart monitor via arduino into unreal.
I would like to establish an average heart-rate over a 60 second duration.
I am using a baud rate of 9600 with 1000ms between readings.
Is there anyway to have a constant ‘average heart rate per minute’ being generated ?

The arduino code I am using is:

#define HR_PIN 7
long hr = 0;
long last_hr_ts = 0;
long last_report_ts = 0;
int report_delay = 1000; //Must be > 1000 miliseconds

long samples[8] = {0}; //size was chosen since it’s optimized in division and modulus
byte last_sample = 0;
long joeys_avg = 0;
long joeys_hr_accumulation = 0;
void setup()
{
pinMode(HR_PIN, INPUT);
Serial.begin(9600);
}
void loop()
{
long current_time = millis();
if (digitalRead(HR_PIN) == HIGH) {
//First sample will be garbage, since last_hr_ts = 0
//dt < 10 means the same sample. Otherwise it means hr of 6000bpm…
//That’s fast even for a colibri
if (current_time - last_hr_ts > 10) {
byte next_sample = ((last_sample + 1) % 8);
samples[next_sample] = current_time - last_hr_ts;
last_sample = next_sample;
}
last_hr_ts = current_time;
}

if (current_time - last_report_ts > report_delay) {
if (current_time - last_hr_ts < report_delay) {
{
long sum_samples = 0;
byte i;
for (i = 1; i < 9; ++i) {
sum_samples += samples((last_sample + i) % 8)]; //optimizes to (last_sample + 1)&7
}
sum_samples /= 8; //optimizes to sum_samples >>= 3
/*To be accurate (2 digits), we multiply the sample by 100, and finally divide result */
//hr = ((100000/(sum_samples))*60)/100;
hr = (6000000/(sum_samples))/100;
Serial.println(hr);
}
} else {
Serial.println(“Out of range”);
}
last_report_ts = current_time;
}
}