# Keyes - AD8232心率監測感測器

<figure><img src="/files/s8oQhrky6Ijgx6P89IE5" alt="" width="351"><figcaption></figcaption></figure>

{% hint style="danger" %} <mark style="color:red;">**注意：**</mark>

* <mark style="color:red;">**避免電線晃動造成雜訊**</mark>
* <mark style="color:red;">**人體動作會影響訊號**</mark>
* <mark style="color:red;">**電極需確實貼合皮膚**</mark>
* <mark style="color:red;">**本感測器不能用於醫療目的。**</mark>
  {% endhint %}

### 測量前準備

將貼片的R、L、COM 極分別貼到右胸/右手、左胸/左手、右腿/右腹處，如下圖所示

<figure><img src="/files/IJwNsGDq1RUsEF61EDnB" alt="" width="563"><figcaption></figcaption></figure>

### Keyes - AD8232心率監測感測器模組電路圖

* Raspberry Pi Pico W
* Raspberry Pi Pico W 擴充板
* Keyes - AD8232心率監測感測

{% hint style="success" %}
*<mark style="color:$warning;">**Keyes - AD8232心律監測感測器是類比訊號輸入。本範例模組的 OUTPUT 腳位需接至Raspberry Pi Pico擴充板 A0/D26 腳位。**</mark>*
{% endhint %}

<figure><img src="/files/z20l2GOEJPBxKvDGznUF" alt=""><figcaption></figcaption></figure>

### Arduino 程式如下

```
#include <Arduino.h>
void setup() {
  // initialize the serial communication:
  Serial.begin(9600);
  pinMode(21, INPUT); //  LO + 接 D21 腳位
  pinMode(22, INPUT); //  LO - 接 D22 腳位

}

void loop() {

  //偵測 LO + 或 LO - 電擊片是否脫落 ，若脫落則顯示為異常(!)
  if((digitalRead(21) == 1)||(digitalRead(22) == 1)){
    Serial.println('!');
  }
  else{
    // send the value of analog input 0:
      Serial.println(analogRead(A0));
  }
  //Wait for a bit to keep serial data from saturating
  delay(1);
}
```

### 程式執行結果

在工具 -> 序列繪圖家 ，開啟後可以看見類似下圖的畫面。

<figure><img src="/files/Cby5PP6ha2MAVZUGnJyT" alt=""><figcaption></figcaption></figure>


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