diff --git a/cpp/mqtt_config.cpp b/cpp/mqtt_config.cpp
deleted file mode 100644
index e3e49a5..0000000
--- a/cpp/mqtt_config.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-
-#include "mqtt_config.hpp"
-
-#include <stdio.h>
-
-#include <iostream>
-#include <sstream>
-#include <string>
-
-using namespace std;
-using namespace nlohmann;
-using namespace iflytop;
-
-void MQTTConfig::initialize(string file_name) {
-  std::ifstream jfile(file_name);
-  jfile >> m_mqttConfigJson;
-  jfile.close();
-  try {
-    m_address  = m_mqttConfigJson["address"];
-    m_username = m_mqttConfigJson["username"];
-    m_password = m_mqttConfigJson["password"];
-    m_clientid = m_mqttConfigJson["clientid"];
-    m_qos      = m_mqttConfigJson["qos"];
-    m_topic    = m_mqttConfigJson["topic"];
-    m_timeout  = m_mqttConfigJson["timeout"];
-  } catch (const std::exception& e) {
-    std::cerr << "mqtt_config_read error: " << e.what() << '\n';
-  }
-}
-
-string MQTTConfig::dump() {
-  sstream ret;
-  ret << "==========================mqtt_config_dump_start===========================" << endl;
-  ret << "address = " << getAddress() << endl;
-  ret << "username = " << getUsername() << endl;
-  ret << "password = " << getPassword() << endl;
-  ret << "clientid = " << getClientid() << endl;
-  ret << "qos = " << getQos() << endl;
-  ret << "topic = " << getTopic() << endl;
-  ret << "timeout = " << getTimeout() << endl;
-  ret << "===========================mqtt_config_dump_end============================" << endl;
-  return ret.str();
-}
-
-string MQTTConfig::getAddress() { return m_address; }
-string MQTTConfig::getUsername() { return m_username; }
-string MQTTConfig::getPassword() { return m_password; }
-string MQTTConfig::getClientid() { return m_clientid; }
-int    MQTTConfig::getQos() { return m_qos; }
-string MQTTConfig::getTopic() { return m_topic; }
-int    MQTTConfig::getTimeout() { return m_timeout; }
diff --git a/cpp/mqtt_config.hpp b/cpp/mqtt_config.hpp
deleted file mode 100644
index 3464c23..0000000
--- a/cpp/mqtt_config.hpp
+++ /dev/null
@@ -1,36 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <iostream>
-#include <nlohmann/json.hpp>
-
-namespace iflytop {
-using namespace std;
-using namespace nlohmann;
-class MQTTConfig {
- private:
-  json   m_mqttConfigJson;
-  string m_address;
-  string m_username;
-  string m_password;
-  string m_clientid;
-  int    m_qos;
-  string m_topic;
-  int    m_timeout;
-
- public:
-  MQTTConfig(/* args */){};
-  ~MQTTConfig(){};
-  void   initialize(string file_name);
-  string dump();
-  string getAddress();
-  string getUsername();
-  string getPassword();
-  string getClientid();
-  int    getQos();
-  string getTopic();
-  int    getTimeout();
-};
-}  // namespace iflytop
diff --git a/cpp/mqtt_demo.cpp b/cpp/mqtt_demo.cpp
deleted file mode 100644
index d6dc4c5..0000000
--- a/cpp/mqtt_demo.cpp
+++ /dev/null
@@ -1,83 +0,0 @@
-//
-// Created by zwsd
-//
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <iostream>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <sstream>
-#include <stdint>
-#include <string>
-#include <vector>
-
-#include "MQTTClient.h"
-#include "mqtt_config.hpp"
-
-typedef struct {
-  string address;
-  string username;
-  string password;
-  string clientid;
-  int    qos;
-  string topic;
-  int    timeout;
-} mqtt_config_t;
-
-share_ptr<MQTTConfig> g_config;
-
-static void publish(MQTTClient client, char *topic, char *payload) {
-  MQTTClient_message message = MQTTClient_message_initializer;
-  message.payload            = payload;
-  message.payloadlen         = strlen(payload);
-  message.qos                = g_mqtt_config.qos;
-  message.retained           = 0;
-  MQTTClient_deliveryToken token;
-  MQTTClient_publishMessage(client, topic, &message, &token);
-  MQTTClient_waitForCompletion(client, token, g_mqtt_config.timeout);
-  printf("Send `%s` to topic `%s` \n", payload, g_mqtt_config.topic.c_str());
-}
-static int on_message(void *context, char *topicName, int topicLen, MQTTClient_message *message) {
-  char *payload = (char *)message->payload;
-  printf("Received `%s` from `%s` topic \n", payload, topicName);
-  MQTTClient_freeMessage(&message);
-  MQTTClient_free(topicName);
-  return 1;
-}
-int main(int argc, char *argv[]) {
-  int        rc;
-  MQTTClient client;
-  MQTTConfig mqttConfig;
-
-  g_config = make_shared<MQTTConfig>();
-  g_config->initialize("mqtt_config.json");
-  printf("mqtt_config.json: \n%s\n", g_config->dump().c_str());
-
-  MQTTClient_create(&client, g_mqtt_config.address.c_str(), g_mqtt_config.clientid.c_str(), 0, NULL);
-  MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
-  conn_opts.username                  = g_mqtt_config.username.c_str();
-  conn_opts.password                  = g_mqtt_config.password.c_str();
-  MQTTClient_setCallbacks(client, NULL, NULL, on_message, NULL);
-  if ((rc = MQTTClient_connect(client, &conn_opts)) != MQTTCLIENT_SUCCESS) {
-    printf("Failed to connect, return code %d\n", rc);
-    exit(-1);
-  } else {
-    printf("Connected to MQTT Broker!\n");
-  }
-  MQTTClient_subscribe(client, g_mqtt_config.topic.c_str(), g_mqtt_config.qos);
-  char payload[23];
-  for (int i = 0; i < 100; i += 1) {
-    snprintf(payload, 23, "{\"RunningState\": \"%d\"}", i);
-    publish(client, (char *)g_mqtt_config.topic.c_str(), payload);
-    sleep(1);
-  }
-  MQTTClient_disconnect(client, g_mqtt_config.timeout);
-  MQTTClient_destroy(&client);
-  
-  return 0;
-}