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
2. Who? ɾࣰݪ ߂ޫʢ@shanonimʣ ɾAndroid
5. What’s “johnny-five”? ɾjavascriptͰArduinoΛૢ࡞ ɾNode.js
6. JSͰIoTʂ ͓΋͠Ζͦ͏ʂ
7. .. IoTͬͯԿ΍Δͷʁ
8. ʮϏοάσʔλɺM2Mɺ ηϯαʔͱΫϥ΢υͰΠϊϕʔ γϣϯʯ
9. ʁ
10. ͱΓ͋͑ͣɺ͓΋͠Ζ͍͜ͱ ΍Γ͍ͨ
13. ੜମIoTɺ͓΋͠Ζͦ͏
14. Arduino + johnny-five + ৺ഥηϯα
16. sample͋Δ͚ͲɺCݴޠ
18. C → Node.js
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
21. ※एׯߴΊʹදࣔ͞ΕΔͷͰௐ੔த
22. + Milkcocoa
23. What’s “Milkcocoa”? ɾIoT BaaS ɾJSON͔ΒάϥϑԽ (freeboard)
25. Θ͟ͱ৺ഥ਺͋͛ͯΈͨ
27. ׆༻ͯ͠ΈΑ͏
28. ͶΉΈײ஌ ɾ຾͘ͳΔͱ৺ഥ਺͕Լ͕Δ܏޲ ɾݕ஌ͨ͠Βslack௨஌ ɾnpm install slack-node
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; });
31. ·ͱΊ ɾJS IoTͨͷ͍͠ ɾIoT΍ͬͨ͜ͱͳ͍JS͓͡͞Μ΋ͥͻ!
33. Happy IoTing!!