Node.jsで心拍センサ使ってみた / heartbeat sensor on Node.js

2015.12.16
JSオジサン#6 @21cafe
https://atnd.org/events/71990

Transcript

1. Node.jsͰ৺ഥηϯα࢖ͬͯΈͨ
   גࣜձࣾϞϯελʔɾϥϘ
   @shanonim
   

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2. Who?
   ɾࣰݪ ߂ޫʢ@shanonimʣ
   ɾAndroid
   

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5. What’s “johnny-five”?
   ɾjavascriptͰArduinoΛૢ࡞
   ɾNode.js
   

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6. JSͰIoTʂ
   ͓΋͠Ζͦ͏ʂ
   

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7. .. IoTͬͯԿ΍Δͷʁ
   

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8. ʮϏοάσʔλɺM2Mɺ
   ηϯαʔͱΫϥ΢υͰΠϊϕʔ
   γϣϯʯ
   

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9. ʁ
   

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10. ͱΓ͋͑ͣɺ͓΋͠Ζ͍͜ͱ
    ΍Γ͍ͨ
    

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13. ੜମIoTɺ͓΋͠Ζͦ͏
    

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14. Arduino + johnny-five
    + ৺ഥηϯα
    

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16. sample͋Δ͚ͲɺCݴޠ
    

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18. C → Node.js
    

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19. // THIS IS THE TIMER 2 INTERRUPT SERVICE ROUTINE.
    // Timer 2 makes sure that we take a reading every 2 miliseconds
    ISR(TIMER2_COMPA_vect){ // triggered when Timer2 counts to 124
    cli(); // disable interrupts while we do this
    Signal = analogRead(pulsePin); // read the Pulse Sensor
    sampleCounter += 2; // keep track of the time in mS with this variable
    int N = sampleCounter - lastBeatTime; // monitor the time since the last beat to avoid noise
    ...
    board.on('ready', function() {
    var led = new five.Led(13);
    sensor = new five.Sensor( {
    pin: 'A0',
    freq: 2
    });
    sensor.on('data', function() {
    signal = this.value;
    sampleCounter += 2;
    var n = sampleCounter - lastBeatTime;
    Node.js
    C
    

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21. ※एׯߴΊʹදࣔ͞ΕΔͷͰௐ੔த
    

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22. + Milkcocoa
    

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23. What’s “Milkcocoa”?
    ɾIoT BaaS
    ɾJSON͔ΒάϥϑԽ (freeboard)
    

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25. Θ͟ͱ৺ഥ਺͋͛ͯΈͨ
    

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27. ׆༻ͯ͠ΈΑ͏
    

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28. ͶΉΈײ஌
    ɾ຾͘ͳΔͱ৺ഥ਺͕Լ͕Δ܏޲
    ɾݕ஌ͨ͠Βslack௨஌
    ɾnpm install slack-node
    

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29. var ds = milkcocoa.dataStore('heartbeat');
    ds.stream().size(10).next(function(err, datas) {
    var averageHeartbeat = 0;
    datas.forEach(function(data) {
    averageHeartbeat += data.value.heartbeat;
    });
    averageHeartbeat /= 10;
    });
    

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31. ·ͱΊ
    ɾJS IoTͨͷ͍͠
    ɾIoT΍ͬͨ͜ͱͳ͍JS͓͡͞Μ΋ͥͻ!
    

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33. Happy IoTing!!
    

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