diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5b08dc6..01f02a7 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,18 +1,19 @@
-{
-    "files.associations": {
-        "array": "cpp",
-        "deque": "cpp",
-        "list": "cpp",
-        "string": "cpp",
-        "unordered_map": "cpp",
-        "vector": "cpp",
-        "string_view": "cpp",
-        "initializer_list": "cpp",
-        "ranges": "cpp",
-        "memory": "cpp",
-        "random": "cpp",
-        "optional": "cpp",
-        "memory_resource": "cpp",
-        "system_error": "cpp"
-    }
+{
+    "files.associations": {
+        "array": "cpp",
+        "deque": "cpp",
+        "list": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "string_view": "cpp",
+        "initializer_list": "cpp",
+        "ranges": "cpp",
+        "memory": "cpp",
+        "random": "cpp",
+        "optional": "cpp",
+        "memory_resource": "cpp",
+        "system_error": "cpp",
+        "*.tcc": "cpp"
+    }
 }
\ No newline at end of file
diff --git a/src/IRbaby.cpp b/src/IRbaby.cpp
index 18656db..de3abb0 100644
--- a/src/IRbaby.cpp
+++ b/src/IRbaby.cpp
@@ -176,8 +176,8 @@ void setup() {
     saveSettings();
 
     delay(SYSTEM_DELAY);
-    connectToAliyunIoT();
     loadIRPin(ConfigData["pin"]["ir_send"], ConfigData["pin"]["ir_receive"]);
+    connectToAliyunIoT();
 
     alinkCheckTask.attach_scheduled(MQTT_CHECK_INTERVALS, checkAlinkMQTT);
     disableIRTask.attach_scheduled(DISABLE_SIGNAL_INTERVALS, disableIR);
@@ -185,6 +185,7 @@ void setup() {
 
 void loop() {
     recvIR();
+    // downloadBin();
     yield();
     aliotKeepAlive();
 }
diff --git a/src/IRbabyIR.cpp b/src/IRbabyIR.cpp
index ec68beb..81b101a 100644
--- a/src/IRbabyIR.cpp
+++ b/src/IRbabyIR.cpp
@@ -30,20 +30,22 @@
 #include "IRbabyUserSettings.h"
 #include "IRbabyIRIS.h"
 #include "IRbabyHttp.h"
+#include "IRbabyUtils.h"
 
 #include "IRbabyIR.h"
 
-#define SAVE_PATH     "/ir/"
+#define IR_SERIES_MAX    (1024)
+#define IR_END_CODE      (10000)
 
-decode_results results; // Somewhere to store the results
-const uint8_t kTimeout = 50;
-// As this program is a special purpose capture/decoder, let us use a larger
-// than normal buffer so we can handle Air Conditioner remote codes.
-const uint16_t kCaptureBufferSize = 1024;
-static IRsend * ir_send = nullptr;
-static IRrecv * ir_recv = nullptr;
 bool saveSignal();
 
+decode_results results; // Somewhere to store the results
+const uint8_t k_timeout = 50;
+// As this program is a special purpose capture/decoder, let us use a larger
+// than normal buffer so we can handle Air Conditioner remote codes.
+const uint16_t k_capture_buffer_size = IR_SERIES_MAX;
+static IRsend * ir_send = nullptr;
+static IRrecv * ir_recv = nullptr;
 
 bool sendIR(String file_name) {
     String save_path = SAVE_PATH + file_name;
@@ -54,9 +56,9 @@ bool sendIR(String file_name) {
             return false;
         }
         Serial.println();
-        uint16_t *data_buffer = (uint16_t *)malloc(sizeof(uint16_t) * 512);
+        uint16_t *data_buffer = (uint16_t *)malloc(sizeof(uint16_t) * IR_SERIES_MAX);
         uint16_t length = cache.size() / 2;
-        memset(data_buffer, 0x0, 512);
+        memset(data_buffer, 0x0, IR_SERIES_MAX);
         INFOF("file size = %d\n", cache.size());
         INFOLN();
         cache.readBytes((char *)data_buffer, cache.size());
@@ -70,6 +72,63 @@ bool sendIR(String file_name) {
     return false;
 }
 
+bool emitIR(String timing) {
+    char* parts[IR_SERIES_MAX];
+    uint16_t series[IR_SERIES_MAX + 1] = { 0 };
+    int parts_num = 0;
+    int i = 0;
+
+    parts_num = split_string(timing, parts, ",");
+    if (parts_num > 0) {
+        for (i = 0; i < parts_num; i++) {
+            series[i] = (uint16_t) atoi(parts[i]);
+            // INFOF("%d ", series[i]);
+        }
+        series[i] = (uint16_t) IR_END_CODE;
+        ir_recv->disableIRIn();
+        ir_send->sendRaw(series, parts_num + 1, 38);
+        ir_recv->enableIRIn();
+    }
+    return true;
+}
+
+bool sendCommand(String file_name, int key) {
+    String save_path = SAVE_PATH;
+    save_path += file_name;
+    if (LittleFS.exists(save_path)) {
+        File cache = LittleFS.open(save_path, "r");
+        if (cache) {
+            UINT16 content_size = cache.size();
+            DEBUGF("content size = %d\n", content_size);
+
+            if (content_size != 0) {
+                UINT8 *content = (UINT8 *)malloc(content_size * sizeof(UINT8));
+                cache.seek(0L, fs::SeekSet);
+                cache.readBytes((char *)content, content_size);
+                ir_binary_open(2, 1, content, content_size);
+                UINT16 *user_data = (UINT16 *)malloc(IR_SERIES_MAX * sizeof(UINT16));
+                UINT16 data_length = ir_decode(0, user_data, NULL, FALSE);
+
+                DEBUGF("data_length = %d\n", data_length);
+                if (LOG_DEBUG) {
+                    for (int i = 0; i < data_length; i++)
+                        Serial.printf("%d ", *(user_data + i));
+                    Serial.println();
+                }
+                ir_recv->disableIRIn();
+                ir_send->sendRaw(user_data, data_length, 38);
+                ir_recv->enableIRIn();
+                ir_close();
+                free(user_data);
+                free(content);
+            } else
+                ERRORF("Open %s is empty\n", save_path.c_str());
+        }
+        cache.close();
+    }
+    return true;
+}
+
 void sendStatus(String file, t_remote_ac_status status) {
     String save_path = SAVE_PATH + file;
     String url = String(DOWNLOAD_PREFIX) + file + String(DOWNLOAD_SUFFIX);
@@ -89,7 +148,7 @@ void sendStatus(String file, t_remote_ac_status status) {
                 cache.seek(0L, fs::SeekSet);
                 cache.readBytes((char *)content, content_size);
                 ir_binary_open(REMOTE_CATEGORY_AC, 1, content, content_size);
-                UINT16 *user_data = (UINT16 *)malloc(1024 * sizeof(UINT16));
+                UINT16 *user_data = (UINT16 *)malloc(IR_SERIES_MAX * sizeof(UINT16));
                 UINT16 data_length = ir_decode(0, user_data, &status, FALSE);
 
                 DEBUGF("data_length = %d\n", data_length);
@@ -156,43 +215,6 @@ void initAC(String file) {
     ACStatus[file]["speed"] = 0;
 }
 
-bool sendKey(String file_name, int key) {
-    String save_path = SAVE_PATH;
-    save_path += file_name;
-    if (LittleFS.exists(save_path)) {
-        File cache = LittleFS.open(save_path, "r");
-        if (cache) {
-            UINT16 content_size = cache.size();
-            DEBUGF("content size = %d\n", content_size);
-
-            if (content_size != 0) {
-                UINT8 *content = (UINT8 *)malloc(content_size * sizeof(UINT8));
-                cache.seek(0L, fs::SeekSet);
-                cache.readBytes((char *)content, content_size);
-                ir_binary_open(2, 1, content, content_size);
-                UINT16 *user_data = (UINT16 *)malloc(1024 * sizeof(UINT16));
-                UINT16 data_length = ir_decode(0, user_data, NULL, FALSE);
-
-                DEBUGF("data_length = %d\n", data_length);
-                if (LOG_DEBUG) {
-                    for (int i = 0; i < data_length; i++)
-                        Serial.printf("%d ", *(user_data + i));
-                    Serial.println();
-                }
-                ir_recv->disableIRIn();
-                ir_send->sendRaw(user_data, data_length, 38);
-                ir_recv->enableIRIn();
-                ir_close();
-                free(user_data);
-                free(content);
-            } else
-                ERRORF("Open %s is empty\n", save_path.c_str());
-        }
-        cache.close();
-    }
-    return true;
-}
-
 void loadIRPin(uint8_t send_pin, uint8_t recv_pin) {
     if (ir_send != nullptr) {
         delete ir_send;
@@ -203,7 +225,7 @@ void loadIRPin(uint8_t send_pin, uint8_t recv_pin) {
     ir_send = new IRsend(send_pin);
     DEBUGF("Load IR send pin at %d\n", send_pin);
     ir_send->begin();
-    ir_recv = new IRrecv(recv_pin, kCaptureBufferSize, kTimeout, true);
+    ir_recv = new IRrecv(recv_pin, k_capture_buffer_size, k_timeout, true);
     disableIR();
 }
 
diff --git a/src/IRbabyIR.h b/src/IRbabyIR.h
index c4af6fa..05557d2 100644
--- a/src/IRbabyIR.h
+++ b/src/IRbabyIR.h
@@ -1,42 +1,54 @@
-/**
- *
- * Copyright (c) 2020-2022 IRbaby-IRext
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#ifndef IRBABY_IR_H
-#define IRBABY_IR_H
-
-#include <Arduino.h>
-#include <IRsend.h>
-#include <IRrecv.h>
-#include "ir_decode.h"
-
-void loadIRPin(uint8_t send_pin, uint8_t recv_pin);
-void enableIR();
-void disableIR();
-void sendStatus(String file_name, t_remote_ac_status status);
-bool sendKey(String file_name, int key);
-bool sendIR(String file_name);
-void recvIR();
-bool saveIR(String file_name);
-void initAC(String);
-
+/**
+ *
+ * Copyright (c) 2020-2022 IRbaby-IRext
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef IRBABY_IR_H
+#define IRBABY_IR_H
+
+#include <Arduino.h>
+#include <IRsend.h>
+#include <IRrecv.h>
+#include "ir_decode.h"
+
+void loadIRPin(uint8_t send_pin, uint8_t recv_pin);
+
+void enableIR();
+
+void disableIR();
+
+bool downloadBin(int remote_id);
+
+bool sendIR(String file_name);
+
+bool emitIR(String timing);
+
+bool sendCommand(String file_name, int key);
+
+void sendStatus(String file_name, t_remote_ac_status status);
+
+void recvIR();
+
+bool saveIR(String file_name);
+
+void initAC(String);
+
 #endif // IRBABY_IR_H
\ No newline at end of file
diff --git a/src/IRbabyIRIS.cpp b/src/IRbabyIRIS.cpp
index 9f78e93..1daaf0c 100644
--- a/src/IRbabyIRIS.cpp
+++ b/src/IRbabyIRIS.cpp
@@ -27,12 +27,14 @@
 
 #include <Esp.h>
 #include <WString.h>
+#include <LittleFS.h>
 
 #include "defines.h"
 #include "IRbabyGlobal.h"
 #include "IRbabySerial.h"
 #include "IRbabyAlink.h"
 #include "IRbabyHttp.h"
+#include "IRbabyIR.h"
 
 #include "IRbabyIRIS.h"
 
@@ -48,10 +50,10 @@ extern String g_device_name;
 extern String g_upstream_topic;
 extern int g_app_id;
 
+
 char iris_credential_token[CREDENTIAL_MAX] = { 0 };
 char iris_server_address[URL_SHORT_MAX] = { 0 };
 
-
 // private function declarations
 static int processEvent(String event_name, String product_key, String device_name, String content);
 static String buildConnect();
@@ -156,6 +158,37 @@ int fetchIrisCredential(String credential_token,
     return ret;
 }
 
+bool downloadBin(int remote_id) {
+    bool ret = false;
+    bool protocol_prefix = false;
+    String save_file = "";
+    String download_bin_url;
+    http_error_t http_ret = HTTP_ERROR_GENERIC;
+
+    if (NULL != strstr(iris_server_address, "http://")) {
+        protocol_prefix = true;
+    }
+    if (protocol_prefix) {
+        download_bin_url = String(iris_server_address);
+    } else {
+        download_bin_url = String("http://");
+        download_bin_url.concat(iris_server_address);
+    }
+    download_bin_url.concat(String(DOWNLOAD_BIN_SUFFIX));
+
+    if (-1 != remote_id) {
+        INFOF("notified to download bin: %d", remote_id);
+        save_file = String("ir_") + String(remote_id);
+
+        String temp = String(SAVE_PATH) + String("/") + save_file;
+        if (!LittleFS.exists(temp)) {
+            downLoadFile(download_bin_url, save_file, SAVE_PATH);
+            ret = true;
+        }
+    }
+    return ret;
+}
+
 void sendIrisKitConnect() {
     String connectMessage = buildConnect();
     sendRawData(g_upstream_topic.c_str(), (uint8_t*) connectMessage.c_str(), connectMessage.length());
@@ -237,8 +270,12 @@ static int handleEmit(String product_key, String device_name, String content) {
     emit_code_doc.clear();
     if (OK == deserializeJson(emit_code_doc, content)) {
         int remote_id = emit_code_doc["remoteId"];
-        int key_number = emit_code_doc["keyNumber"];
-        INFOF("will emit key : %d for remote %d\n", key_number, remote_id);
+        String key_name = emit_code_doc["keyName"];
+        String key_value = emit_code_doc["keyValue"];
+        INFOF("will emit key : %s for remote %d = %s\n", key_name.c_str(), remote_id, key_value.c_str());
+        emitIR(key_value);
+    } else {
+        INFOF("deserialize failed\n");
     }
     return 0;
 }
\ No newline at end of file
diff --git a/src/IRbabyIRIS.h b/src/IRbabyIRIS.h
index 6a47e85..69692a9 100644
--- a/src/IRbabyIRIS.h
+++ b/src/IRbabyIRIS.h
@@ -33,6 +33,8 @@
 #define DOWNLOAD_PREFIX              "http://irext-debug.oss-cn-hangzhou.aliyuncs.com/irda_"
 #define DOWNLOAD_SUFFIX              ".bin"
 
+// IRext bin code storage
+#define SAVE_PATH                    "/ir/"
 
 // IRIS communication
 #define EVENT_NAME_CONNECT           "__connect"
diff --git a/src/IRbabyUtils.cpp b/src/IRbabyUtils.cpp
new file mode 100644
index 0000000..70d37e7
--- /dev/null
+++ b/src/IRbabyUtils.cpp
@@ -0,0 +1,71 @@
+/**
+ *
+ * Copyright (c) 2020-2022 IRbaby-IRext
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "IRbabyUtils.h"
+
+int split_string(const String source, char* parts[], const char* delimiter) {
+    char* pch = NULL;
+    char* copy = NULL;
+    char* tmp = NULL;
+    int i = 0;
+
+    copy = strdup(source.c_str());
+    if (NULL == copy) {
+        goto exit;
+    }
+
+    pch = strtok(copy, delimiter);
+
+    tmp = strdup(pch);
+    if (NULL == tmp) {
+        goto exit;
+    }
+
+    parts[i++] = tmp;
+
+    while (pch) {
+        pch = strtok(NULL, delimiter);
+        if (NULL == pch) break;
+
+        tmp = strdup(pch);
+        if (NULL == tmp) {
+            goto exit;
+        }
+
+        parts[i++] = tmp;
+    }
+
+    free(copy);
+    return i;
+
+exit:
+    free(copy);
+    for (int j = 0; j < i; j++) {
+        free(parts[j]);
+    }
+    return -1;
+}
\ No newline at end of file
diff --git a/src/IRbabyUtils.h b/src/IRbabyUtils.h
new file mode 100644
index 0000000..f0636da
--- /dev/null
+++ b/src/IRbabyUtils.h
@@ -0,0 +1,32 @@
+/**
+ *
+ * Copyright (c) 2020-2022 IRbaby-IRext
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "WString.h"
+
+#ifndef IRBABY_IRIS_UTILS_H
+#define IRBABY_IRIS_UTILS_H
+
+int split_string(const String source, char* parts[], const char* delimiter);
+
+#endif //IRBABY_IRIS_UTILS_H
+