diff --git a/applications/drv_ec800k.c b/applications/drv_ec800k.c
index 8158480..9c476c3 100644
--- a/applications/drv_ec800k.c
+++ b/applications/drv_ec800k.c
@@ -73,6 +73,7 @@ int16_t BSP_LTE_CipSend(uint8_t *pdata, uint32_t length, uint32_t waittime) {
 int16_t BSP_LTE_SendCmd(const char *cmd, const char *expect, const char *error,
                         uint32_t waittime) {
   rt_kprintf("%s\n", cmd);
+  hw_printf("%s\n", cmd);
   BSP_LTE_SendData((uint8_t *)cmd, rt_strlen(cmd));
 
   rt_err_t ret = rt_sem_take(lte_dev.com_dev_rx_sem, waittime);
@@ -84,7 +85,7 @@ int16_t BSP_LTE_SendCmd(const char *cmd, const char *expect, const char *error,
     rt_device_read(lte_dev.com_dev, 0, lte_dev.at_buf, sizeof(lte_dev.at_buf));
 
     rt_kprintf("%s\n", lte_dev.at_buf);
-
+    hw_printf("%s\n", lte_dev.at_buf);
     /* 清空缓存 */
     uint8_t c;
     while (rt_device_read(lte_dev.com_dev, 0, &c, 1) == 1) {
diff --git a/applications/drv_ec800k.h b/applications/drv_ec800k.h
index 21b051a..3029725 100644
--- a/applications/drv_ec800k.h
+++ b/applications/drv_ec800k.h
@@ -239,6 +239,9 @@ typedef struct {
   rt_device_t com_dev;
   rt_sem_t com_dev_rx_sem;
   rt_uint8_t at_buf[256];
+
+  rt_thread_t tid1;
+  rt_thread_t tid2;
 } CLte_dev_t;
 extern CLte_dev_t lte_dev;
 
diff --git a/applications/main.c b/applications/main.c
index 80205d2..18dcaaf 100644
--- a/applications/main.c
+++ b/applications/main.c
@@ -45,13 +45,13 @@ int main(void) {
   BSP_LET_Register_Com(u2);
 
   /* 创建任务2和任务3，分别从U2和U3收发数据 */
-  rt_thread_t tid =
-      rt_thread_create("lte", task_let_entry, RT_NULL, 1024 + 512, 10, 5);
-  if (tid) {
-    rt_thread_startup(tid);
+  lte_dev.tid1 =
+      rt_thread_create("lte", task_let_entry, RT_NULL, 2048, 10, 5);
+  if (lte_dev.tid1) {
+    rt_thread_startup(lte_dev.tid1);
   }
-  tid = rt_thread_create("com", task_com_entry, RT_NULL, 1024, 11, 5);
-  if (tid) {
-    rt_thread_startup(tid);
+  lte_dev.tid2 = rt_thread_create("com", task_com_entry, RT_NULL, 1024, 11, 5);
+  if (lte_dev.tid2) {
+    rt_thread_startup(lte_dev.tid2);
   }
 }