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arduino-cli/libraries/SparkFun_MAX3010x_Sensor/examples/Example5_HeartRate/Example5_HeartRate.ino

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+/*
+  Optical Heart Rate Detection (PBA Algorithm) using the MAX30105 Breakout
+  By: Nathan Seidle @ SparkFun Electronics
+  Date: October 2nd, 2016
+  https://github.com/sparkfun/MAX30105_Breakout
+
+  This is a demo to show the reading of heart rate or beats per minute (BPM) using
+  a Penpheral Beat Amplitude (PBA) algorithm.
+
+  It is best to attach the sensor to your finger using a rubber band or other tightening
+  device. Humans are generally bad at applying constant pressure to a thing. When you
+  press your finger against the sensor it varies enough to cause the blood in your
+  finger to flow differently which causes the sensor readings to go wonky.
+
+  Hardware Connections (Breakoutboard to Arduino):
+  -5V = 5V (3.3V is allowed)
+  -GND = GND
+  -SDA = A4 (or SDA)
+  -SCL = A5 (or SCL)
+  -INT = Not connected
+
+  The MAX30105 Breakout can handle 5V or 3.3V I2C logic. We recommend powering the board with 5V
+  but it will also run at 3.3V.
+*/
+
+#include <Wire.h>
+#include "MAX30105.h"
+
+#include "heartRate.h"
+
+MAX30105 particleSensor;
+
+const byte RATE_SIZE = 4; //Increase this for more averaging. 4 is good.
+byte rates[RATE_SIZE]; //Array of heart rates
+byte rateSpot = 0;
+long lastBeat = 0; //Time at which the last beat occurred
+
+float beatsPerMinute;
+int beatAvg;
+
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("Initializing...");
+
+  // Initialize sensor
+  if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) //Use default I2C port, 400kHz speed
+  {
+    Serial.println("MAX30105 was not found. Please check wiring/power. ");
+    while (1);
+  }
+  Serial.println("Place your index finger on the sensor with steady pressure.");
+
+  particleSensor.setup(); //Configure sensor with default settings
+  particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running
+  particleSensor.setPulseAmplitudeGreen(0); //Turn off Green LED
+}
+
+void loop()
+{
+  long irValue = particleSensor.getIR();
+
+  if (checkForBeat(irValue) == true)
+  {
+    //We sensed a beat!
+    long delta = millis() - lastBeat;
+    lastBeat = millis();
+
+    beatsPerMinute = 60 / (delta / 1000.0);
+
+    if (beatsPerMinute < 255 && beatsPerMinute > 20)
+    {
+      rates[rateSpot++] = (byte)beatsPerMinute; //Store this reading in the array
+      rateSpot %= RATE_SIZE; //Wrap variable
+
+      //Take average of readings
+      beatAvg = 0;
+      for (byte x = 0 ; x < RATE_SIZE ; x++)
+        beatAvg += rates[x];
+      beatAvg /= RATE_SIZE;
+    }
+  }
+
+  Serial.print("IR=");
+  Serial.print(irValue);
+  Serial.print(", BPM=");
+  Serial.print(beatsPerMinute);
+  Serial.print(", Avg BPM=");
+  Serial.print(beatAvg);
+
+  if (irValue < 50000)
+    Serial.print(" No finger?");
+
+  Serial.println();
+}
+
+

arduino-cli/libraries/SparkFun_MAX3010x_Sensor/examples/Example5_HeartRate/License.ino

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+/* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+* 
+*/