diff --git a/stm32f4/main.c b/stm32f4/main.c
index 95e8bdd..acea767 100755
--- a/stm32f4/main.c
+++ b/stm32f4/main.c
@@ -31,7 +31,7 @@ void system_init(void)
     led_init();
     system_tick_init();
     // lcd_init();
-    rs485_init();
+    // rs485_init();
     dwin_init();
 }
 
diff --git a/stm32f4/src/dwin.c b/stm32f4/src/dwin.c
index c8d69e0..a0cee85 100644
--- a/stm32f4/src/dwin.c
+++ b/stm32f4/src/dwin.c
@@ -4,6 +4,7 @@
 #include "stm32f4xx_dma.h"
 #include "lark1s.h"
 #include "dwin.h"
+#include "rs485.h"
 
 #define DWIN_TX_STREAM   DMA1_Stream6
 #define DWIN_RX_STREAM   DMA1_Stream5
@@ -11,6 +12,7 @@
 #define DWIN_BUFF_RX_LEN (4096)
 uint8_t dwin_buff_tx[DWIN_BUFF_TX_LEN] __attribute__((aligned(16)));
 uint8_t dwin_buff_rx[DWIN_BUFF_RX_LEN] __attribute__((aligned(16)));
+static int __attribute__((section(".bss_ccm"))) sm = 0;
 
 extern uint32_t system_tick_cnt;
 
@@ -105,10 +107,29 @@ static void dwin_endian_reverse_2byte(uint8_t *buffer, uint16_t val)
     buffer[1] = (uint8_t)(val & 0xFF);
 }
 
+void dwin_rx_parse(uint8_t *buffer, uint16_t len)
+{
+    uint32_t baudrate;
+    uint8_t *p = buffer;
+
+    sm++;
+    if (sm > 1) {
+        sm = 0;
+    }
+    if (p[0] != 0x5A || p[1] != 0xA5 || p[2] != 0x12 || p[3] != 0x83 || p[4] != 0x51 || p[5] != 0x00 || p[6] != 0x07) {
+        return;
+    }
+    rs485_mb_addr = p[16];
+    baudrate = (uint32_t)p[20];
+    baudrate |= (uint32_t)p[19] << 8;
+    baudrate |= (uint32_t)p[18] << 16;
+    baudrate |= (uint32_t)p[17] << 24;
+    rs485_baudrate = baudrate;
+}
+
 void dwin_loop(void)
 {
     static uint32_t ms = 0;
-    static int flag = 0;
     uint16_t len;
     uint16_t i;
 
@@ -117,7 +138,7 @@ void dwin_loop(void)
     }
     ms = system_tick_cnt;
     len = 0;
-    if (flag == 0) {
+    if (sm == 0) {
         /* read control data */
         dwin_buff_tx[len++] = 0x5A;
         dwin_buff_tx[len++] = 0xA5; /* frame head */
@@ -222,7 +243,6 @@ void dwin_loop(void)
         len += 4;
     }
     dwin_send(len);
-    flag++;
 }
 
 void USART2_IRQHandler(void)
@@ -249,9 +269,6 @@ void USART2_IRQHandler(void)
         DMA_ClearFlag(DWIN_RX_STREAM, DMA_FLAG_TCIF5 | DMA_FLAG_HTIF5 | DMA_FLAG_TEIF5 | DMA_FLAG_DMEIF5 | DMA_FLAG_FEIF5);
         len = DMA_GetCurrDataCounter(DWIN_RX_STREAM);
         len = DWIN_BUFF_RX_LEN - len;
-        for (uint16_t i = 0; i < len; i++) {
-            dwin_buff_tx[i] = dwin_buff_rx[i] + 1;
-        }
-        dwin_send(len);
+        dwin_rx_parse(dwin_buff_rx, len);
     }
 }
diff --git a/stm32f4/src/dwin.h b/stm32f4/src/dwin.h
index 2c7f74f..efa060a 100644
--- a/stm32f4/src/dwin.h
+++ b/stm32f4/src/dwin.h
@@ -14,7 +14,7 @@
 
 
 #define DWIN_DATA_DISP_ADDR (0x5000)
-#define DWIN_DATA_DISP_LENG (0x38)
+#define DWIN_DATA_DISP_LENG (0x3A)
 #define DWIN_DATA_CTRL_ADDR (0x5100)
 #define DWIN_DATA_CTRL_LENG (0x07)
 
diff --git a/stm32f4/src/rs485.c b/stm32f4/src/rs485.c
index ebdef3b..3578a7a 100644
--- a/stm32f4/src/rs485.c
+++ b/stm32f4/src/rs485.c
@@ -13,6 +13,8 @@
 uint8_t rs485_buff_tx[RS485_BUFF_TX_LEN] __attribute__((aligned(16)));
 uint8_t rs485_buff_rx[RS485_BUFF_RX_LEN] __attribute__((aligned(16)));
 static int __attribute__((section(".bss_ccm"))) sm = 0;
+uint32_t rs485_baudrate __attribute__((section(".bss_ccm"))) = 19200;
+uint8_t rs485_mb_addr __attribute__((section(".bss_ccm"))) = 1;
 
 char sn[16] __attribute__((section(".bss_ccm")));
 struct lark1s_gas_info_s lark1s_gas_info __attribute__((section(".bss_ccm")));
@@ -62,7 +64,7 @@ void rs485_init(void)
 
     USART_DeInit(USART3);
     USART_OverSampling8Cmd(USART3, ENABLE);
-    USART_InitStructure.USART_BaudRate = RS485_BAUDRATE;
+    USART_InitStructure.USART_BaudRate = rs485_baudrate;
     USART_InitStructure.USART_WordLength = USART_WordLength_8b;
     USART_InitStructure.USART_Parity = USART_Parity_No;
     USART_InitStructure.USART_StopBits = USART_StopBits_1;
@@ -107,12 +109,11 @@ void rs485_init(void)
     USART_ReceiveData(USART3);
     USART_ClearITPendingBit(USART3, USART_IT_IDLE);
     USART_ClearITPendingBit(USART3, USART_IT_TC);
-
-    // rs485_send(15);
 }
 
 void rs485_send(uint16_t len)
 {
+    USART_ITConfig(USART3, USART_IT_IDLE, DISABLE);
     rs485_mode_tx();
     DMA_SetCurrDataCounter(RS485_TX_STREAM, len);
     DMA_Cmd(RS485_TX_STREAM, ENABLE);
@@ -157,11 +158,21 @@ void rs485_state_machine_rx(int len)
 void rs485_loop(void)
 {
     static uint32_t ms = 0;
+    static uint32_t baudrate = 0;
+    static uint8_t addr = 0;
 
     if (system_tick_cnt < (ms + 200)) {
         return;
     }
     ms = system_tick_cnt;
+    if (baudrate != rs485_baudrate) {
+        baudrate = rs485_baudrate;
+        rs485_init();
+    }
+    if (addr != rs485_mb_addr) {
+        addr = rs485_mb_addr;
+        lark1s_set_mb_address(addr);
+    }
     rs485_state_machine_tx();
 }
 
diff --git a/stm32f4/src/rs485.h b/stm32f4/src/rs485.h
index f1a91f9..ba0938f 100644
--- a/stm32f4/src/rs485.h
+++ b/stm32f4/src/rs485.h
@@ -12,8 +12,8 @@
 #define RS485_PIN_RX    (GPIO_Pin_11)
 #define RS485_PIN_DIR   (GPIO_Pin_1)
 
-#define RS485_BAUDRATE  (115200)
-#define RS485_MB_ADDR   (9)
+extern uint32_t rs485_baudrate;
+extern uint8_t rs485_mb_addr;
 
 void rs485_init(void);
 void rs485_send(uint16_t len);