# 心律感測器

## **科易KEYES 心律感測器**

![](https://1275793585-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fcavedu%2F-M2H3JEpR8boCneeCrvV%2F-M2HvxPu6f2dYtQkx6gr%2F0.png?generation=1584086899180816\&alt=media)

## **專案說明**

使用「科易KEYES Arduino UNO R3 開發板」連接「科易KEYES心律感測器」,讀取心跳速率。

此科易KEYES心律感測器包含於「[科易KEYES心律感測器](https://robotkingdom.com.tw/product/keyes-%E5%BF%83%E5%BE%8B%E6%84%9F%E6%B8%AC%E5%99%A8/)」內。

## **KEYES Arduino UNO R3電路圖**

· [KEYES Arduino UNO R3](https://www.robotkingdom.com.tw/product/keyes-uno-r3/)

· 科易KEYES心律感測器 模組

![](https://1275793585-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Fcavedu%2F-M2H3JEpR8boCneeCrvV%2F-M2HvxPvgqVMGh1E_G6Q%2F1.png?generation=1584086899152667\&alt=media)

{% hint style="info" %}
科易KEYES心律感測器是數位訊號輸入，可以接「D0 \~ D13」的KEYES Arduino UNO R3訊號端上。本範例連接到「D2」。

科易KEYES心律感測器上S部分的腳位接到Arduino端的D2、VCC腳位接V端、GND腳位接到GND。
{% endhint %}

## **Arduino 程式**

將貼片連接線插入科易KEYES心律感測器，連接線另一頭R端貼右心房位置，L端貼左心房位置，COM貼左右心房中間；打開arduino序列埠監控視窗，序列埠鮑率每秒9600；測試板上D2燈號隨測試人心率閃爍，同時打開序列埠視窗看有無偵測到數值，左側為偵測之原始數值、右側為心律值。

產生出的 Arduino 程式如下

```
long time = 0;
long old_time = 0;
long difference = 0;
int heart_reat = 0;
void setup()
{
 Serial.begin(9600);
 pinMode(2, INPUT);
 attachInterrupt(0, falling, FALLING);
}
// --------------------------------------------
void loop()
{
}
// ---------------------------------------------
void falling()
{
 time = millis();
 difference = time - old_time;
 old_time = millis();
 heart_reat = 60000 / difference;
 Serial.print(difference);
 Serial.print(" ");
 if(heart_reat < 200)
 Serial.println(heart_reat);
 else
 Serial.println("Over Max");
}
```


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