diff --git a/README.md b/README.md
index 3ed2592..6070274 100644
--- a/README.md
+++ b/README.md
@@ -74,3 +74,6 @@
 - 数据长度错误回包
   - `B5 F4 03 65 72 72 40`, 有效数据为 `err`
 
+### 3. 读取数据时间间隔
+
+- 推荐数据时间间隔至少为200ms
diff --git a/inc/rs485.h b/inc/rs485.h
index b24f233..33ce875 100644
--- a/inc/rs485.h
+++ b/inc/rs485.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/types.h>
+#include "tmp112.h"
 
 /******************************************************************************/
 
diff --git a/src/main.c b/src/main.c
index 6d9db53..814f3b7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -18,6 +18,21 @@
 uint32_t g_temperature_uint32;
 uint32_t g_eddy_current_value_uint32;
 
+void watchdog_init(void) {
+    /* Enable the LSI clock */
+    rcu_osci_on(RCU_IRC8M);
+    rcu_osci_stab_wait(RCU_IRC8M);
+
+    /* Enable the FWDGT clock */
+    rcu_periph_clock_enable(RCU_WWDGT);
+
+    /* Configure FWDGT counter clock: 40KHz(IRC40K) / 256 = 0.15625 KHz */
+    fwdgt_config(156, FWDGT_PSC_DIV256); // Set timeout to 4 seconds (625 / 0.15625 KHz)
+
+    /* Enable FWDGT */
+    fwdgt_enable();
+}
+
 /*!
     \brief      main function
     \param[in]  none
@@ -40,13 +55,16 @@ int main(void) {
     /* configure LDC1612 */
     ldc1612_single_ch0_config();
 
+    watchdog_init();
+
     while (1) {
-        delay_ms(100);
+        delay_ms(99);
         g_eddy_current_value_uint32 = 0;
         g_temperature_uint32 = 0;
         g_eddy_current_value_uint32 = ldc1612_get_raw_channel_result(CHANNEL_0);
-        g_temperature_uint32 = tmp112a_get_raw_channel_result();
+        // g_temperature_uint32 = tmp112a_get_raw_channel_result();
         // printf("1");
+        fwdgt_counter_reload();
     }
 }
 
diff --git a/src/rs485.c b/src/rs485.c
index b578061..1182126 100644
--- a/src/rs485.c
+++ b/src/rs485.c
@@ -135,10 +135,12 @@ void eddy_current_value_report(void) {
 }
 
 void tempture_value_report(void) {
-    package_data[0] = (g_temperature_uint32 >> 24) & 0xFF;
-    package_data[1] = (g_temperature_uint32 >> 16) & 0xFF;
-    package_data[2] = (g_temperature_uint32 >> 8) & 0xFF;
-    package_data[3] = g_temperature_uint32 & 0xFF;
+    uint32_t temperature_uint32 = tmp112a_get_raw_channel_result();
+
+    package_data[0] = (temperature_uint32 >> 24) & 0xFF;
+    package_data[1] = (temperature_uint32 >> 16) & 0xFF;
+    package_data[2] = (temperature_uint32 >> 8) & 0xFF;
+    package_data[3] = temperature_uint32 & 0xFF;
 
     uint8_t combined_data[7];
     memcpy(combined_data, package_header, 3);