biomurph
commented
6 years ago First off, I am using Arduino 1.8.5, along with the PulseSensor Playground version 1.4.5, and I am able to compile for the UNO board. What is the error message you are getting? BTW, I will be updating to 1.4.6 today.
I just tried your code (targeting a Leonardo, which shouldn't make a difference). I don't have any GSR or EMG sensors, so I see cross-talk on the A1 and A2 pins (lower amplitude pulse wave). I don't get any of the high value BPM that you're talking about... Granted I did not run it for a long time.
You can comment out or remove the lines if (pulseSensor.sawStartOfBeat()) { pulseSensor.outputBeat(); } Since you are already reporting the values of BPM and IBI in the code you wrote. The outputBeat function will simply report those values.
When the PulseSensor is idle, it is possible to get erroneous pulses. We don't have any stock noise cancelling code, because each individual setup is different, but if you look at the Tools page, there is a function call that returns the amplitude of the pulse wave. You may be able to use that to remove erroneous beats.
Please share a screen shot of the issue that you are seeing. Also, this is the deprecated code repo. This conversation really belongs on the Playground repo.
jens-k
I have a problem similar to at least two others that have been reported (but I couldn't find a solution so far). The bpm output of the sensor sometimes goes up to unrealistic values (~150) while the times series of the heartbeat appears to be transmitted truthfully. The problem becomes evident already when I look at the 'raw' output in the serial monitor (so its not my later processing of that output). Even without being attached to a finger the bpm shoots up once in a while, while the heart beat time series remains quite constant and certainly below my provided threshold.
I'm using an Arduino Uno Rev 3. To the same board I have attached a GSR and an EMG sensor (which is handled in the code below, too). I use version 1.2.3 of the PulseSensor Playground library (since later versions gave me compiler errors).
I know that other people had the same problem too, but in one case the sensor was fake, in the other I think no solution was found. I'm using the sensor to teach medical students how mental states influence physiological responses by visualizing several physiological parameters with matlab while they perform mentally stressful tasks. I and they would be really grateful if there was a solution to the problem.
Find attached a photo of my sensor and my code.
Thanks! Jens
define USE_ARDUINO_INTERRUPTS true
include
const int OUTPUT_TYPE = SERIAL_PLOTTER;
const int PIN_INPUT = A0; const int PIN_BLINK = 13; // Pin 13 is the on-board LED const int THRESHOLD = 720; // tried this with values up to 950 int h1; int h2; int h3; int g; int m;
PulseSensorPlayground pulseSensor; // all the PulseSensor Playground functions.
void setup() {
Serial.begin(115200);
// Configure the PulseSensor manager. pulseSensor.analogInput(PIN_INPUT); pulseSensor.blinkOnPulse(PIN_BLINK);
pulseSensor.setSerial(Serial); pulseSensor.setOutputType(OUTPUT_TYPE); pulseSensor.setThreshold(THRESHOLD);
// Now that everything is ready, start reading the PulseSensor signal. if (!pulseSensor.begin()) { / If your Sketch hangs here, try ProcessEverySample.ino, which doesn't use interrupts. / for (;;) { // Flash the led to show things didn't work. digitalWrite(PIN_BLINK, LOW); delay(50); digitalWrite(PIN_BLINK, HIGH); delay(50); } } }
void loop() { delay(20); // was 20
// Get the sensor data h1 = pulseSensor.getLatestSample(); h2 = pulseSensor.getBeatsPerMinute(); h3 = pulseSensor.getInterBeatIntervalMs(); g = analogRead(A1); m = analogRead(A2);
// Send data to serial port Serial.print(h1); // Full heart time series Serial.print(F(",")); Serial.print(h2); // BPM Serial.print(F(",")); Serial.print(h3); // IBI Serial.print(F(",")); Serial.print(g); // GSR Serial.print(F(",")); Serial.print(m); // Muscle Serial.println();
if (pulseSensor.sawStartOfBeat()) { pulseSensor.outputBeat(); } }