CPrint3

# 安裝 mosquitto broker
brew install mosquitto

# 啟動 mosquitto 服務並設定開機自啟
brew services start mosquitto

#include <WiFi.h>
#include <PubSubClient.h>
#include <ETH.h>

// ======= 1. Wi-Fi 與 MQTT 設定 (透過無線連網接收列印任務) =======
const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";
const char* mqtt_server = "192.168.1.XXX"; // 您的電腦本地 IP
const char* mqtt_user = "admin";
const char* mqtt_pass = "27886988";

// ======= 2. 實體網路線對接出單機設定 =======
const char* printer_ip_str = "192.168.0.99";  // mC-Print3 目前的靜態 IP
const uint16_t printer_port = 9100;           // 熱感出單機標準 Port

// WT32-ETH01 乙太網口靜態 IP 設定 (必須與出單機在 192.168.0.x 同網域)
IPAddress eth_local_ip(192, 168, 0, 100);
IPAddress eth_gateway(192, 168, 0, 1);
IPAddress eth_subnet(255, 255, 255, 0);

// ======= 3. WT32-ETH01 乙太網晶片 (LAN8720) 腳位定義 =======
#define ETH_PHY_TYPE    ETH_PHY_LAN8720
#define ETH_PHY_ADDR    1
#define ETH_PHY_MDC     23
#define ETH_PHY_MDIO    18
#define ETH_CLK_MODE    ETH_CLOCK_GPIO0_IN
#define ETH_POWER_PIN   16

WiFiClient espClient;
PubSubClient client(espClient);

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("正在連線至 Wi-Fi: ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  int retry_count = 0;
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    retry_count++;
    if (retry_count > 40) { // 20 秒連線逾時
      Serial.println("\nWi-Fi 連線逾時，重新嘗試中...");
      WiFi.begin(ssid, password);
      retry_count = 0;
    }
  }

  Serial.println("");
  Serial.println("Wi-Fi 連線成功！");
  Serial.print("ESP32 Wi-Fi IP 位址: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  Serial.print("收到列印要求 [");
  Serial.print(topic);
  Serial.println("] ");
  
  // 透過實體網路線 (Ethernet) TCP 直接發送給印表機的 Port 9100
  WiFiClient printerClient;
  Serial.print("正在連線至出單機 (");
  Serial.print(printer_ip_str);
  Serial.println(")...");
  
  if (printerClient.connect(printer_ip_str, printer_port)) {
    Serial.println("連線成功！正在傳送列印資料...");
    // 寫入列印資料
    printerClient.write(payload, length);
    // 強制排空快取
    printerClient.flush();
    // 關閉 TCP 連線，出單機收到斷開訊號後會自動輸出與切紙
    printerClient.stop();
    Serial.println("列印資料發送完成，已中斷連線。");
  } else {
    Serial.println("錯誤：無法連線至出單機！請檢查網路線是否對接、印表機是否開機。");
  }
}

void reconnect() {
  // 循環重連 MQTT Broker
  while (!client.connected()) {
    Serial.print("正在連線至 MQTT Broker (");
    Serial.print(mqtt_server);
    Serial.print(")...");
    
    // 建立隨機 Client ID
    String clientId = "CPrint3_WT32_";
    clientId += String(random(0xffff), HEX);
    
    if (client.connect(clientId.c_str(), mqtt_user, mqtt_pass)) {
      Serial.println("已成功連線！");
      // 訂閱列印請求主題
      client.subscribe("cprint3/printer/request");
      Serial.println("已成功訂閱主題: cprint3/printer/request");
    } else {
      Serial.print("連線失敗，錯誤碼 rc=");
      Serial.print(client.state());
      Serial.println("，將於 5 秒後重試...");
      delay(5000);
    }
  }
}

void setup() {
  // 初始化除錯用序列埠 (USB 連接電腦監控)
  Serial.begin(115200);
  
  // ======= 初始化 WT32-ETH01 實體網路孔 (LAN8720) =======
  Serial.println("正在初始化實體網路孔...");
  pinMode(ETH_POWER_PIN, OUTPUT);
  digitalWrite(ETH_POWER_PIN, HIGH);
  delay(500); // 等待晶片供電穩定
  
  // Arduino Core 3.0+ 需要傳入 6 個參數
  ETH.begin(ETH_PHY_TYPE, ETH_PHY_ADDR, ETH_PHY_MDC, ETH_PHY_MDIO, ETH_POWER_PIN, ETH_CLK_MODE);
  ETH.config(eth_local_ip, eth_gateway, eth_subnet);
  Serial.println("實體網路孔初始化完成，靜態 IP 設定為 192.168.0.100");

  // ======= 初始化 Wi-Fi 連線 =======
  setup_wifi();
  
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();
}

# 更新套件庫並安裝 Mosquitto 伺服器與客戶端工具
sudo apt update
sudo apt install -y mosquitto mosquitto-clients

# =================================================================
# 1. 傳統 TCP 連線埠 (供 ESP32 微控制器連線)
# =================================================================
listener 1883 0.0.0.0
allow_anonymous false
password_file /etc/mosquitto/passwd

# =================================================================
# 2. WebSockets 連線埠 (供此網頁測試沙盒連線)
# =================================================================
listener 9001 0.0.0.0
protocol websockets
allow_anonymous false
password_file /etc/mosquitto/passwd

# 建立密碼檔並新增名為 admin 的使用者 (會提示輸入密碼)
sudo mosquitto_passwd -c /etc/mosquitto/passwd admin

# 如果未來要新增其他使用者 (移除 -c，否則會覆蓋整個檔案)：
# sudo mosquitto_passwd /etc/mosquitto/passwd new_user

# 重新啟動 Mosquitto 服務以套用新配置
sudo systemctl restart mosquitto

# 設定開機時自動啟動服務
sudo systemctl enable mosquitto