Undefined reference

[dicobrazz]

Hi, thank you for the great code!

I have an issue of undefined reference, it might just because I am a total beginner:)

Arduino: 1.6.12 (Mac OS X), Board: "Arduino/Genuino Uno"

/var/folders/r2/h34h074s3xv3wdfcgs8l5_yw0000gn/T//cc44E7VM.ltrans0.ltrans.o: In function global constructors keyed to 65535_0_MAX30100_Minimal.ino.cpp.o.1945': cc44E7VM.ltrans0.o:(.text.startup+0x74): undefined reference toPulseOximeter::PulseOximeter()' /var/folders/r2/h34h074s3xv3wdfcgs8l5_yw0000gn/T//cc44E7VM.ltrans0.ltrans.o: In function main': cc44E7VM.ltrans0.o:(.text.startup+0x170): undefined reference toPulseOximeter::begin(PulseOximeterDebuggingMode)' cc44E7VM.ltrans0.o:(.text.startup+0x17c): undefined reference to PulseOximeter::setOnBeatDetectedCallback(void (*)())' cc44E7VM.ltrans0.o:(.text.startup+0x184): undefined reference toPulseOximeter::update()' cc44E7VM.ltrans0.o:(.text.startup+0x1ce): undefined reference to PulseOximeter::getHeartRate()' cc44E7VM.ltrans0.o:(.text.startup+0x324): undefined reference toPulseOximeter::getSpO2()' collect2: error: ld returned 1 exit status exit status 1 Error compiling for board Arduino/Genuino Uno.

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

[oxullo]

Hey @dicobrazz it compiles fine under the same premises (arduino:1.6.12, board:Uno, max30100lib:1.0.0, OSX:10.11.6 example:MAX30100_Minimal). Could you post the code you're trying to compile? Have you tried to compile the examples?

[dicobrazz]

thank you @oxullo for a prompt reply! I am testing the example code "Minimal", after installing your library through "library manager" Haven't changed a thing.

` /* Arduino-MAX30100 oximetry / heart rate integrated sensor library Copyright (C) 2016 OXullo Intersecans x@brainrapers.org

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. */

include

include "MAX30100_PulseOximeter.h"

define REPORTING_PERIOD_MS 1000

// PulseOximeter is the higher level interface to the sensor // it offers: // * beat detection reporting // * heart rate calculation // * SpO2 (oxidation level) calculation PulseOximeter pox;

uint32_t tsLastReport = 0;

// Callback (registered below) fired when a pulse is detected void onBeatDetected() { Serial.println("Beat!"); }

void setup() { Serial.begin(115200);

// Initialize the PulseOximeter instance and register a beat-detected callback
pox.begin();
pox.setOnBeatDetectedCallback(onBeatDetected);

}

void loop() { // Make sure to call update as fast as possible pox.update();

// Asynchronously dump heart rate and oxidation levels to the serial
// For both, a value of 0 means "invalid"
if (millis() - tsLastReport > REPORTING_PERIOD_MS) {
    Serial.print("Heart rate:");
    Serial.print(pox.getHeartRate());
    Serial.print("bpm / SpO2:");
    Serial.print(pox.getSpO2());
    Serial.println("%");

    tsLastReport = millis();
}

}`

[dicobrazz]

I have no idea what it was, i just shut down the app and opened the project again and it worked!! I am so sorry!

[dicobrazz]

Have you tested it with Arduino 101?

[oxullo]

It requires minimal intervention to make it working:

1. add an include for Wire.h to the sketch
2. comment out MAX30100.cpp:30

bye!