อยากทราบความหมายโค้ดตัวนี้อะครับ

สวัสดีครับ คือตอนนี้ผมทำโปรเจคตู้จดหมายแจ้งเตือนทางไลน์อ่ะครับ ตอนนี้ผมกำลังทำรูปเล่ม แต่คือตอนนี้ยังไม่รู้ความหมายของโค้ดตัวนี้อะครับ ช่วยแปลความหมายให้หน่อยครับ

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นี้ตัวโค้ดครับช่วยหน่อยครับ
void Line_Notify1(String message1) ;
#include <ESP8266WiFi.h>
#include <DHT.h>
#define WIFI_SSID "Somjai 2.4GHz"
#define WIFI_PASSWORD "0881820172"
#define LINE_TOKEN_PIR "0xlbhrkti0EnD026JsdczCe4M2QSppcVKeilo8Cb5iW"
#define PirPin D6
#define PirPin D6
#define DHTPIN D7
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);
String message1 = "%E0%B8%88%E0%B8%94%E0%B8%AB%E0%B8%A1%E0%B8%B2%E0%B8%A2%E0%B8%A1%E0%B8%B2%E0%B8%AA%E0%B9%88%E0%B8%87%E0%B9%81%E0%B8%A5%E0%B9%89%E0%B8%A7";
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 - ts2 >= 60000) && (WiFi.status() == WL_CONNECTED)) {
read_sensor();
}
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;
client.setInsecure();//skip verification
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;
}
}
}
void read_sensor() {
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C ");
}