diff --git a/inc/LDC1612.h b/inc/LDC1612.h
index 615e13f..d919afb 100644
--- a/inc/LDC1612.h
+++ b/inc/LDC1612.h
@@ -15,6 +15,7 @@
 #include <math.h>
 
 #define LDC1612_ADDR         (0x2B << 1)
+#define TMP112A_ADDR         (0x49 << 1)
 
 /*Register Rddr*/
 /***************************************************************************/
@@ -119,4 +120,6 @@ uint8_t ldc1612_iic_read_16bits(uint8_t reg_addr, uint8_t *data);
 
 uint8_t ldc1612_iic_write_16bits(uint8_t reg_addr, uint8_t data[2]);
 
+uint32_t TMP112A_ReadTemperature(void);
+
 #endif //LDC1612_H
diff --git a/src/LDC1612.c b/src/LDC1612.c
index 66c2282..bf05668 100644
--- a/src/LDC1612.c
+++ b/src/LDC1612.c
@@ -646,3 +646,113 @@ uint8_t ldc1612_iic_write_16bits(uint8_t reg_addr, uint8_t data[2]) {
     }
     return I2C_END;
 }
+
+uint32_t TMP112A_ReadTemperature(void) {
+    uint8_t data[2] = {0};
+    uint16_t raw_temp = 0;
+    uint16_t timeout = 0;
+    uint32_t temperature = 0;
+
+    i2c_ack_config(I2C0, I2C_ACK_ENABLE);
+
+    while (i2c_flag_get(I2C0, I2C_FLAG_I2CBSY) && (timeout < I2C_TIME_OUT)) //判断IIC总线是否忙，发送起始信号
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_start_on_bus(I2C0);
+        timeout = 0;
+    } else {
+        printf("err\r\n");
+        return -1; // 超时返回错误
+    }
+
+    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT)) //判断起始位是否发送，设置sensor地址并设置为写
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_master_addressing(I2C0, TMP112A_ADDR, I2C_TRANSMITTER);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    while (!i2c_flag_get(I2C0, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) //判断地址是否发送完成，然后发送寄存器地址
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_data_transmit(I2C0, 0x00);
+        timeout = 0;
+        // i2c_start_on_bus(I2C0);
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    while (i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) //判断发送缓冲器是否为空，为空后（发送完毕）重新发送开始信号
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_start_on_bus(I2C0);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    while (!i2c_flag_get(I2C0, I2C_FLAG_SBSEND) && (timeout < I2C_TIME_OUT)) {
+        timeout++;
+    }
+    if (timeout < I2C_TIME_OUT) {
+        i2c_master_addressing(I2C0, TMP112A_ADDR, I2C_RECEIVER);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    while (!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND) && (timeout < I2C_TIME_OUT))
+        timeout++;
+    if (timeout < I2C_TIME_OUT) {
+        i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    // 读取第一个字节的数据
+    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
+        timeout++;
+    }
+    if (timeout < I2C_TIME_OUT) {
+        data[0] = i2c_data_receive(I2C0);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
+
+    // 读取第二个字节的数据
+    while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
+        timeout++;
+    }
+    if (timeout < I2C_TIME_OUT) {
+        data[1] = i2c_data_receive(I2C0);
+        timeout = 0;
+    } else {
+        return -1; // 超时返回错误
+    }
+
+    i2c_stop_on_bus(I2C0);
+
+    // printf("data[0]: %x, data[1]: %x\r\n", data[0], data[1]);
+    raw_temp = ((uint16_t) (data[0] << 4) | (data[1]>>4));
+    // printf("raw_temp: %x\r\n", raw_temp);
+    // printf("raw_temp(dec): %d\r\n", raw_temp);
+    temperature = raw_temp * 625;
+    // printf("temperature: %d\r\n", temperature);
+
+    return temperature;
+}
diff --git a/src/RS485.c b/src/RS485.c
index 2db76b7..557f9c9 100644
--- a/src/RS485.c
+++ b/src/RS485.c
@@ -4,6 +4,8 @@
 
 #include "RS485.h"
 
+extern uint32_t g_temperature_uint32;
+
 void RS485_config(void) {
     rcu_periph_clock_enable(RS485_GPIO_RCU);
     rcu_periph_clock_enable(RS485_RCU);
@@ -35,7 +37,8 @@ void process_command(char *cmd) {
     if (strncmp(cmd, "M1", 2) == 0) {
         printf("M1 -=-=- OK!\r\n");
     } else if (strncmp(cmd, "M2", 2) == 0) {
-        printf("M2 -=-=- OK!\r\n");
+        // printf("M2 -=-=- OK!\r\n");
+        printf("Temperature: %lu\r\n", g_temperature_uint32);
         // } else if (strncmp(cmd, "M3", 2) == 0) {
         //     char *param_str = cmd + 2; // Skip "M3"
         //     int param = atoi(param_str + 1); // Skip "S" and convert to integer
diff --git a/src/gd32e23x_it.c b/src/gd32e23x_it.c
index fd03276..604c5cf 100644
--- a/src/gd32e23x_it.c
+++ b/src/gd32e23x_it.c
@@ -36,6 +36,10 @@ OF SUCH DAMAGE.
 #include "main.h"
 #include "systick.h"
 #include "LDC1612.h"
+#include "RS485.h"
+
+char rx_buffer[RX_BUFFER_SIZE];
+uint8_t rx_index = 0;
 
 /*!
     \brief      this function handles NMI exception
@@ -120,4 +124,24 @@ void TIMER16_IRQHandler(void) {
         }
         led_status = !led_status;
     }
+}
+
+void USART0_IRQHandler(void) {
+    if(RESET != usart_interrupt_flag_get(USART0, USART_INT_FLAG_RBNE))
+    {
+        usart_interrupt_flag_clear(USART0, USART_INT_FLAG_RBNE);
+        uint8_t received_data = (uint8_t)usart_data_receive(USART0);
+
+        // 将接收到的数据存储到缓冲区
+        if(rx_index < RX_BUFFER_SIZE - 1) {
+            rx_buffer[rx_index++] = received_data;
+        }
+
+        // 检查是否接收到换行符，表示指令结束
+        if(received_data == '\n') {
+            rx_buffer[rx_index] = '\0'; // 添加字符串结束符
+            process_command(rx_buffer); // 处理指令
+            rx_index = 0; // 重置缓冲区索引
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 472d74f..61854a4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -12,6 +12,8 @@
 #include "RS485.h"
 #include "LDC1612.h"
 
+uint32_t g_temperature_uint32;
+
 void led_config(void) {
     rcu_periph_clock_enable(LED_RCU);
 
@@ -64,6 +66,7 @@ int main(void) {
         delay_ms(500);
         raw_value = ldc1612_get_raw_channel_result(CHANNEL_0);
         printf("data:%ld\r\n",raw_value);
+        g_temperature_uint32 = TMP112A_ReadTemperature();
     }
 }