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arduino-cli/libraries/PulseSensorPlayground/examples/SoftwareSerialDemo/SoftwareSerialDemo.ino

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+/*
+   Code to detect pulses from the PulseSensor,
+   using an interrupt service routine and
+   using SoftwareSerial for Serial output.
+
+   Here is a link to the tutorial that discusses this coe
+   https://pulsesensor.com/pages/getting-advanced
+
+   Copyright World Famous Electronics LLC - see LICENSE
+   Contributors:
+     Joel Murphy, https://pulsesensor.com
+     Yury Gitman, https://pulsesensor.com
+     Bradford Needham, @bneedhamia, https://bluepapertech.com
+
+   Licensed under the MIT License, a copy of which
+   should have been included with this software.
+
+   This software is not intended for medical use.
+*/
+
+#define USE_ARDUINO_INTERRUPTS true    // we want the Playground to use interrupts
+#include <PulseSensorPlayground.h>
+#include <SoftwareSerial.h>
+
+/*
+   The format of our output.
+
+   Set this to PROCESSING_VISUALIZER if you're going to run
+    the Processing Visualizer Sketch.
+    See https://github.com/WorldFamousElectronics/PulseSensor_Amped_Processing_Visualizer
+
+   Set this to SERIAL_PLOTTER if you're going to run
+    the Arduino IDE's Serial Plotter.
+*/
+const int OUTPUT_TYPE = SERIAL_PLOTTER;
+
+/*
+     PIN_RX = Serial Receive pin (input into Arduino)
+     PIN_TX = Serial Transmit pin (output from Arduino)
+
+     In most cases, you'll want to wire the Arduino PIN_RX
+     to the TRANSMIT pin of the external serial device,
+     and the Arduino PIN_TX to the RECEIVE pin of the
+     external device.
+*/
+const int PIN_RX = 7;
+const int PIN_TX = 8;
+
+const int PULSE_INPUT = A0;
+const int PULSE_BLINK = 13;    // Pin 13 is the on-board LED
+const int PULSE_FADE = 5;      // Must be a PWM pin other than 9 or 10.
+const int THRESHOLD = 550;   // Adjust this number to avoid noise when idle
+
+/*
+   Our software serial controller.
+ */
+SoftwareSerial ourSerial(PIN_RX, PIN_TX);
+
+PulseSensorPlayground pulseSensor;
+
+void setup() {
+
+  ourSerial.begin(115200);
+
+  // Configure the PulseSensor manager.
+
+  pulseSensor.analogInput(PULSE_INPUT);
+  pulseSensor.blinkOnPulse(PULSE_BLINK);
+  pulseSensor.fadeOnPulse(PULSE_FADE);
+
+  pulseSensor.setSerial(ourSerial);
+  pulseSensor.setOutputType(OUTPUT_TYPE);
+  pulseSensor.setThreshold(THRESHOLD);
+
+  if (!pulseSensor.begin()) {
+    /*
+     * PulseSensor initialization failed,
+     * likely because our particular Arduino platform interrupts
+     * aren't supported yet.
+     *
+     * If your Sketch hangs here, try changing USE_ARDUINO_INTERRUPTS to false.
+     */
+    for(;;) {
+      // Flash the led to show things didn't work.
+      digitalWrite(PULSE_BLINK, LOW);
+      delay(50);
+      digitalWrite(PULSE_BLINK, HIGH);
+      delay(50);
+    }
+  }
+}
+
+void loop() {
+  delay(20);
+
+  pulseSensor.outputSample();
+
+  if (pulseSensor.sawStartOfBeat()) {
+    pulseSensor.outputBeat();
+  }
+}