diff --git a/app/src/main/cpp/CMakeLists.txt b/app/src/main/cpp/CMakeLists.txt
index f9b828f0..c5424297 100644
--- a/app/src/main/cpp/CMakeLists.txt
+++ b/app/src/main/cpp/CMakeLists.txt
@@ -87,6 +87,7 @@ SET(CAMERA2_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/camera2)
 
 SET(FREETYPE_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/freetype)
 
+SET(MQTT_ROOT ${TERM_CORE_ROOT}/Client/mqtt)
 # SET(EVPP_SRC_DIR ${EVPP_ROOT}/evpp)
 
 include_directories(${YAMC_INC_DIR})
@@ -182,6 +183,62 @@ SET(CAMERA2_SOURCES
         # ${CAMERA2_ROOT_DIR}/utils/camera_utils.cpp
         ${CAMERA2_ROOT_DIR}/ndkcamera.cpp)
 
+SET(MQTT_SOURCES
+        ${MQTT_ROOT}/mosquitto/lib/actions.c
+        ${MQTT_ROOT}/mosquitto/lib/alias_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/callbacks.c
+        ${MQTT_ROOT}/mosquitto/lib/connect.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_auth.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_connack.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_disconnect.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_ping.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_pubackcomp.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_publish.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_pubrec.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_pubrel.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_suback.c
+        ${MQTT_ROOT}/mosquitto/lib/handle_unsuback.c
+        ${MQTT_ROOT}/mosquitto/lib/helpers.c
+        ${MQTT_ROOT}/mosquitto/lib/logging_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/loop.c
+        ${MQTT_ROOT}/mosquitto/lib/memory_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/messages_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/mosquitto.c
+        ${MQTT_ROOT}/mosquitto/lib/net_mosq_ocsp.c
+        ${MQTT_ROOT}/mosquitto/lib/net_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/options.c
+        ${MQTT_ROOT}/mosquitto/lib/packet_datatypes.c
+        ${MQTT_ROOT}/mosquitto/lib/packet_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/property_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/read_handle.c
+        ${MQTT_ROOT}/mosquitto/lib/send_connect.c
+        ${MQTT_ROOT}/mosquitto/lib/send_disconnect.c
+        ${MQTT_ROOT}/mosquitto/lib/send_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/send_publish.c
+        ${MQTT_ROOT}/mosquitto/lib/send_subscribe.c
+        ${MQTT_ROOT}/mosquitto/lib/send_unsubscribe.c
+        ${MQTT_ROOT}/mosquitto/lib/socks_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/srv_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/thread_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/time_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/tls_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/utf8_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/util_mosq.c
+        ${MQTT_ROOT}/mosquitto/lib/util_topic.c
+        ${MQTT_ROOT}/mosquitto/lib/will_mosq.c
+
+        ${MQTT_ROOT}/mosquitto_wrapper.cpp
+        ${MQTT_ROOT}/JNIEnvHandler.cpp
+        ${MQTT_ROOT}/MqttClient.cpp
+
+        )
+include_directories(
+        ${MQTT_ROOT}
+        ${MQTT_ROOT}/openssl/include
+        ${MQTT_ROOT}/uthash/src
+        ${MQTT_ROOT}/mosquitto
+        ${MQTT_ROOT}/mosquitto/lib)
+
 add_definitions(-DFT2_BUILD_LIBRARY=1)
 SET(FREETYPE_SRC_FILES
         ${FREETYPE_ROOT}/src/autofit/autofit.c
@@ -253,6 +310,12 @@ add_library( # Sets the name of the library.
 
 add_definitions(-DDARWIN_NO_CARBON)
 add_definitions(-DFT2_BUILD_LIBRARY)
+
+add_library(
+        mqtt
+        STATIC
+        ${MQTT_SOURCES}
+)
 add_library(
         freetype
         STATIC
@@ -353,7 +416,7 @@ target_link_libraries( # Specifies the target library.
 
         freetype
         # breakpad
-
+        mqtt
         # Links the target library to the log library
         # included in the NDK.
         ${log-lib}
diff --git a/app/src/main/cpp/GPIOControl.cpp b/app/src/main/cpp/GPIOControl.cpp
index d4b69f39..e370c8d2 100644
--- a/app/src/main/cpp/GPIOControl.cpp
+++ b/app/src/main/cpp/GPIOControl.cpp
@@ -137,14 +137,15 @@ std::string GpioControl::getString(int cmd)
 bool GpioControl::SetN938Cmd(int cmd, int val)
 {
     char buf[32] = { 0 };
-    snprintf(buf, "out %d %d", cmd, val);
+    sprintf(buf, "out %d %d", cmd, val);
 
     IOT_PARAM param;
     int len = MAX_STRING_LEN < strlen(buf) ? MAX_STRING_LEN : strlen(buf);
 
     param.cmd = cmd;
     memset(param.str, 0, MAX_STRING_LEN);
-    memcpy(param.str, value.c_str(), len);
+//    memcpy(param.str, value.c_str(), len);
+    memcpy(param.str, buf, len);
 
     int fd = open(GPIO_NODE_MP, O_RDONLY);
     if( fd > 0 )
@@ -152,7 +153,7 @@ bool GpioControl::SetN938Cmd(int cmd, int val)
         ioctl(fd, IOT_PARAM_WRITE, &param);
         close(fd);
     }
-    return;
+    return true;
 }
 
 bool GpioControl::OpenSensors()