# 按鈕模組
## 按鈕模組
**專案說明**
使用「Raspberry Pi Pico W」連接「按鈕模組」, 讀取按鈕模組的數值變化。此**按鈕模組**包含於「洞洞五教學材料包」內。
### **按鈕模組電路圖**
* Raspberry Pi Pico W
* Raspberry Pi Pico W 擴充板
* 按鈕模組
**按鈕模組**是**數位訊號**輸入， 可以接「D0\~ D28」的Raspberry Pi Pico擴充板訊號端上。 本範例連接到「D7」
以下介紹兩款按鈕模組的接線圖，一款是上面有金色字體寫著「**digital Push Button Module V2.0**」，另一款模組沒有。
**有**寫「**digital Push Button Module V2.0**」的按鈕模組接線圖
**沒有**寫「**digital Push Button Module V2.0**」的按鈕模組接線圖
### **BlocklyDuino 程式 (Button)**
兩款的程式都是相同的，請見下圖。
### **Arduino 程式(Button.ino)如下**
```
void setup()
{
pinMode(7, INPUT);
Serial.begin(9600);
}
void loop()
{
Serial.println(digitalRead(7));
delay(500);
}
```
### **程式執行結果:**
兩款模組操作上有差異，**有**寫「**digital Push Button Module V2.0**」的按鈕模組接線圖，是**按鈕壓下為1，放開為0。**
而**沒有**寫「**digital Push Button Module V2.0**」的按鈕模組接線圖，是**按鈕壓下為0，放開為1。**
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