IS it possible to connect mqtt broker in node-red with esp8266?

[coldbook01]

I want to use different from mqtt's network to accomplish different domains access mqtt broker on node-red, but it need enter localhost as password. The test is now unsuccessful, I want to know the feasibility of this function. `#include <ESP8266WiFi.h> #include <PubSubClient.h>

// WiFi 設定 const char* ssid = ""; const char* password = "";

// MQTT 伺服器資訊 const char* mqttServer = "https://easy-wasps-spend.loca.lt"; // 您的 LocalTunnel 公佈的 URL const int mqttPort = ;

// MQTT 用戶名和密碼 const char* mqttUser = ""; const char* mqttPassword = "";

WiFiClient espClient; PubSubClient client(espClient);

void setup() { Serial.begin(115200); setup_wifi(); client.setServer(mqttServer, mqttPort); client.setCallback(callback); }

void setup_wifi() { delay(10); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); // 包含路由器登錄密碼 while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); }

void callback(char* topic, byte* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); for (int i = 0; i < length; i++) { Serial.print((char)payload[i]); } Serial.println(); }

void reconnect() { while (!client.connected()) { Serial.print("Attempting MQTT connection..."); if (client.connect("ESP8266Client", mqttUser, mqttPassword)) { Serial.println("connected"); client.subscribe(""); // 訂閱 room/light 節點 } else { Serial.print("failed, rc="); Serial.print(client.state()); Serial.println(" try again in 5 seconds"); delay(5000); } } }

void loop() { if (!client.connected()) { reconnect(); } client.loop(); // 在這裡可以添加您的代碼，發送或處理 MQTT 消息 } ` this is the code i trying with.