Compilation error: 'D6' was not declared in this scope

มีวิธีแก้ไหมคับพี่ๆประกาศตัวแปรยังไงคับ

void Line_Notify1(String message1) ;
#include <ESP8266WiFi.h>
#define WIFI_SSID “iPhonepapar”
#define WIFI_PASSWORD “11111111”
#define LINE_TOKEN_PIR “LsG4cgzZ91TzfBbhcqcZHR7SicCdGsi9Em3Mo4oBgRf”
#define PirPin 6

String message1 = “%E0%B8%A1%E0%B8%B5%E0%B9%80%E0%B8%AD%E0%B8%81%E0%B8%AA%E0%B8%B2%E0%B8%A3%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88”;
bool beep_state = false;
bool send_state = false;
uint32_t ts, ts1, ts2;
void setup() {
Serial.begin(115200);
Serial.println();
pinMode(PirPin, INPUT);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
// dht.begin();
Serial.println(“connecting”);
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print(“connecting”);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(“.”);
delay(500);
}
Serial.println();
Serial.print("connected: ");
Serial.println(WiFi.localIP());
delay(10000);
Serial.println(“Pir Ready!!”);
//read_sensor();
ts = ts1 = ts2 = millis();
}
void loop() {
ts = millis();
if (WiFi.status() == WL_CONNECTED) {
digitalWrite(LED_BUILTIN, LOW);
} else {
digitalWrite(LED_BUILTIN, HIGH);
}

if ((ts - ts1 >= 5000) && (beep_state == true)) {
beep_state = false;
}

if ((digitalRead(PirPin) == HIGH) && (beep_state == false) && (WiFi.status() == WL_CONNECTED)) {
while (digitalRead(PirPin) == HIGH) delay(100);
Serial.println(“Detect !”);
Line_Notify1(message1);
beep_state = true;
}
delay(10);
}
void Line_Notify1(String message) {
WiFiClientSecure client;
if (!client.connect(“notify-api.line.me”, 443))
{
Serial.println(“connection failed”);
delay(2000);
return;
}
String req = “”;
req += “POST /api/notify HTTP/1.1\r\n”;
req += “Host: notify-api.line.me\r\n”;
req += "Authorization: Bearer " + String(LINE_TOKEN_PIR) + “\r\n”;
req += “Cache-Control: no-cache\r\n”;
req += “User-Agent: ESP8266\r\n”;
req += “Content-Type: application/x-www-form-urlencoded\r\n”;
req += "Content-Length: " + String(String(“message=” + message1).length()) + “\r\n”;
req += “\r\n”;
req += “message=” + message1;
// Serial.println(req);
client.print(req);
delay(20);
while (client.connected()) {
String line = client.readStringUntil(‘\n’);
if (line == “\r”) {
break;
}
}
}

ลองเปลี่ยนเป็น #define PirPin GPIO12 ครับ