#include <WiFi.h>                   // 匯入 WiFi 程式庫
#include "ThingSpeak.h"             // 匯入 ThingSpeak 程式庫
const char* ssid = "Wokwi-GUEST";   // 輸入您的 WiFi 名稱
const char* psw  = "";              // 輸入您的 WiFi 密碼
unsigned long channel = 662689;     // 輸入您的頻道號碼 Channel ID
int LED = 23;                       // LED 連接在 GPIO23
WiFiClient client;
void setup() 
{ Serial.begin(115200);      delay(10);
  pinMode(LED, OUTPUT);      // LED 為輸出接腳    
  digitalWrite(LED, LOW);    // LED 預設輸出為 LOW
  WiFi.begin(ssid, psw);     // 連接 WiFi
  while (WiFi.status() != WL_CONNECTED) 
  { delay(500); Serial.print(".");   }
  Serial.println("");  Serial.println("WiFi connected");
  ThingSpeak.begin(client);         // 連接 ThingSpeak 伺服器
}
void loop()
{ // 讀入 ThingSpeak Field1 數值
  int led = ThingSpeak.readFloatField(channel, 1);
  if(led == 1)
  { digitalWrite(LED, HIGH);    // 設定 LED on
    Serial.println("LED On");
  }
  else if(led == 0)
  { digitalWrite(LED, LOW);     // 設定 LED off
    Serial.println("LED Off");
  }
  delay(1000);                  // 每 1 秒取樣一次
}