下面的代码是整个项目的代码。它真的不工作，所以我需要帮助。

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP8266WiFi.h>
#include <PubSubClient.h>

#define TRIGGER_PIN1 7
#define ECHO_PIN1 6
#define TRIGGER_PIN2 9
#define ECHO_PIN2 8
#define GREEN_LED_PIN1 2
#define GREEN_LED_PIN2 3
#define RED_LED_PIN1 4
#define RED_LED_PIN2 5

const char* ssid = "A";
const char* password = "B";
const char* mqttServer = "mqtt.thingspeak.com";
const int mqttPort = 1883;
const char* mqttUsername = "ECYYHBMYHQIRLxUzJgghEyU";
const char* mqttPassword = "XF+iiofTxPi4o/o8ycNXEyWF";
const char* channelID = "2164468";
const char* writeAPIKey = "MMXEWBFUDA1XJLRO";

LiquidCrystal_I2C lcd(0x27, 16, 2);

int Seat1 = 0, Seat2 = 0;
int Seat = 2;

WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  Serial.begin(9600);

  pinMode(TRIGGER_PIN1, OUTPUT);
  pinMode(ECHO_PIN1, INPUT);
  pinMode(TRIGGER_PIN2, OUTPUT);
  pinMode(ECHO_PIN2, INPUT);
  pinMode(GREEN_LED_PIN1, OUTPUT);
  pinMode(GREEN_LED_PIN2, OUTPUT);
  pinMode(RED_LED_PIN1, OUTPUT);
  pinMode(RED_LED_PIN2, OUTPUT);

  lcd.init();
  lcd.backlight();

  lcd.clear();
  lcd.print("Hello, Welcome to");
  lcd.setCursor(0, 1);
  lcd.print("Seat Reservation");
  lcd.setCursor(0, 2);
  lcd.print("System");

  delay(2000);
  lcd.clear();

  int total = Seat1 + Seat2;
  Seat = Seat - total;

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  client.setServer(mqttServer, mqttPort);
  while (!client.connected()) {
    if (client.connect("NodeMCU", mqttUsername, mqttPassword)) {
      Serial.println("Connected to MQTT broker");
    } else {
      Serial.print("Failed, rc=");
      Serial.print(client.state());
      Serial.println(" Retrying in 5 seconds...");
      delay(5000);
    }
  }
}

void loop() {
  long duration1, distance1;
  digitalWrite(TRIGGER_PIN1, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN1, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN1, LOW);
  duration1 = pulseIn(ECHO_PIN1, HIGH);
  distance1 = duration1 * 0.034 / 2;

  long duration2, distance2;
  digitalWrite(TRIGGER_PIN2, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN2, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN2, LOW);
  duration2 = pulseIn(ECHO_PIN2, HIGH);
  distance2 = duration2 * 0.034 / 2;

  lcd.setCursor(0, 0);
  lcd.print("Total Seat: ");
  lcd.print(Seat);
  lcd.print("   ");

  lcd.setCursor(0, 1);
  if (Seat1 == 1) {
    lcd.print("Seat 1: Fill ");
  } else {
    lcd.print("Seat 1: Empty");
  }

  lcd.setCursor(0, 2);
  if (Seat2 == 1) {
    lcd.print("Seat 2: Fill ");
  } else {
    lcd.print("Seat 2: Empty");
  }

  if (distance1 > 2) {
    digitalWrite(GREEN_LED_PIN1, HIGH);
    digitalWrite(RED_LED_PIN1, LOW);
    Seat1 = 0;
  } else {
    digitalWrite(GREEN_LED_PIN1, LOW);
    digitalWrite(RED_LED_PIN1, HIGH);
    Seat1 = 1;
  }

  if (distance2 > 2) {
    digitalWrite(GREEN_LED_PIN2, HIGH);
    digitalWrite(RED_LED_PIN2, LOW);
    Seat2 = 0;
  } else {
    digitalWrite(GREEN_LED_PIN2, LOW);
    digitalWrite(RED_LED_PIN2, HIGH);
    Seat2 = 1;
  }
   const char* payload = "Sample payload";  // Replace "Sample payload" with your actual payload data

  if (client.connected()) {
    String topic = "channels/" + String(channelID) + "/publish/" + String(writeAPIKey);
    const char* topicPtr = topic.c_str();
    const char* payloadPtr = payload;
    client.publish(topicPtr, payloadPtr);
    Serial.println("Data sent to ThingSpeak");
  } else {
    Serial.println("Failed to send data to ThingSpeak");
  }

  delay(200);
}

我写的代码。今天我试着运行它。但它不起作用，因为在我的ThingSpeak通道没有任何数据。请用其他代码帮我弄清楚。这是我的个人项目。该项目的主题是座位预订系统与物联网。