diff --git a/APP_Framework/Applications/app_test/Kconfig b/APP_Framework/Applications/app_test/Kconfig
index 3302d3596..c3fde9f87 100644
--- a/APP_Framework/Applications/app_test/Kconfig
+++ b/APP_Framework/Applications/app_test/Kconfig
@@ -59,7 +59,7 @@ menu "test app"
                 select RESOURCES_PIN
                 select BSP_USING_UART2
                 select BSP_USING_LORA
-                bool "Config test uart"
+                bool "Config test uart(loraE220)"
                 default n
                 if USER_TEST_LORA
                     if ADD_XIZI_FETURES
@@ -72,6 +72,24 @@ menu "test app"
                     endif
                 endif
 
+            menuconfig USER_TEST_RS485
+                select BSP_USING_UART
+                select BSP_USING_GPIO
+                select RESOURCES_PIN
+                select BSP_USING_UART1
+                bool "Config test uart(RS485)"
+                default n
+                if USER_TEST_RS485
+                    if ADD_XIZI_FETURES
+                        config RS485_UART_DEV_DRIVER
+                            string "Set uart dev path"
+                            default "/dev/uart1_dev1"
+                        config RS485_PIN_DEV_DRIVER
+                            string "Set pin dev path"
+                            default "/dev/pin_dev"
+                    endif
+                endif
+
             menuconfig USER_TEST_RTC
                 select BSP_USING_RTC
                 bool "Config test rtc"
diff --git a/APP_Framework/Applications/app_test/Makefile b/APP_Framework/Applications/app_test/Makefile
index ad0368c10..b511ec9e6 100644
--- a/APP_Framework/Applications/app_test/Makefile
+++ b/APP_Framework/Applications/app_test/Makefile
@@ -53,5 +53,9 @@ ifeq ($(CONFIG_ADD_XIZI_FETURES),y)
         SRC_FILES += test_rtc.c
     endif
 
+    ifeq ($(CONFIG_USER_TEST_RS485),y)
+        SRC_FILES += test_rs485.c
+    endif    
+
     include $(KERNEL_ROOT)/compiler.mk
 endif
diff --git a/APP_Framework/Applications/app_test/test_loraE220.c b/APP_Framework/Applications/app_test/test_loraE220.c
index 4ea400669..c4409dd21 100644
--- a/APP_Framework/Applications/app_test/test_loraE220.c
+++ b/APP_Framework/Applications/app_test/test_loraE220.c
@@ -17,7 +17,7 @@
 #define BSP_E220_M0_PIN 32
 #define BSP_E220_M1_PIN 33
 
-void TestLora(int argc, char *agrv[])
+void TestLora(int argc, char *argv[])
 {
     char uart_recvbuff[100];
     memset(uart_recvbuff, 0, sizeof(uart_recvbuff));
@@ -39,7 +39,6 @@ void TestLora(int argc, char *agrv[])
 
     struct PinStat pin_m0;
     struct PinStat pin_m1;
-    struct PinStat pin_key;
     pin_m0.pin = BSP_E220_M0_PIN;
     pin_m1.pin = BSP_E220_M1_PIN;
 
@@ -47,19 +46,10 @@ void TestLora(int argc, char *agrv[])
     struct PrivIoctlCfg ioctl_cfg;
     struct PinParam pin_param;
     pin_param.cmd = GPIO_CONFIG_MODE;
-    pin_param.mode = GPIO_CFG_INPUT;
-
-    ioctl_cfg.ioctl_driver_type = PIN_TYPE;
-    ioctl_cfg.args = (void *)&pin_param;
-    if (0 != PrivIoctl(pin_fd, OPE_CFG, &ioctl_cfg))
-    {
-        printf("ioctl pin fd error %d\n", pin_fd);
-        PrivClose(pin_fd);
-        return;
-    }
-
     pin_param.mode = GPIO_CFG_OUTPUT;
     pin_param.pin = BSP_E220_M0_PIN;
+    ioctl_cfg.ioctl_driver_type = PIN_TYPE;
+    ioctl_cfg.args = &pin_param;
     if (0 != PrivIoctl(pin_fd, OPE_CFG, &ioctl_cfg))
     {
         printf("ioctl pin fd error %d\n", pin_fd);
@@ -106,7 +96,7 @@ void TestLora(int argc, char *agrv[])
     printf("lora configure into sleep(configure) mode\n");
 
     // send configure data, and receive the same length of data
-    char sendbuff[] = {0xC0, 0x00, 0x05, 0x19, 0x49, 0xE6, 0x00, 0x17}; // config as address 1949 CH17 2.4kps
+    char sendbuff[] = {0xC0, 0x00, 0x05, 0x19, 0x49, 0xE6, 0x00, 0x17}; // config as address 1949 CH17 36.8kps
 
     PrivTaskDelay(2000);
 
@@ -150,6 +140,8 @@ void TestLora(int argc, char *agrv[])
         PrivRead(uart_fd, uart_recvbuff, sizeof(uart_recvbuff));
         printf("Receive Data is :\n%s\n", uart_recvbuff);
     }
+    PrivClose(pin_fd);
+    PrivClose(uart_fd);
 }
 
 PRIV_SHELL_CMD_FUNCTION(TestLora, a lora test sample, PRIV_SHELL_CMD_MAIN_ATTR);
diff --git a/APP_Framework/Applications/app_test/test_rs485.c b/APP_Framework/Applications/app_test/test_rs485.c
index e69de29bb..8b9fd5e1e 100644
--- a/APP_Framework/Applications/app_test/test_rs485.c
+++ b/APP_Framework/Applications/app_test/test_rs485.c
@@ -0,0 +1,87 @@
+#include <stdio.h>
+#include <string.h>
+#include <transform.h>
+
+#define BSP_485_DIR_PIN 24
+
+void Test485(void)
+{
+    int pin_fd = PrivOpen(RS485_PIN_DEV_DRIVER, O_RDWR);
+    if (pin_fd < 0)
+    {
+        printf("open pin fd error:%d\n", pin_fd);
+        return;
+    }
+
+    int uart_fd = PrivOpen(RS485_UART_DEV_DRIVER, O_RDWR);
+    if (uart_fd < 0)
+    {
+        printf("open pin fd error:%d\n", uart_fd);
+        return;
+    }
+    printf("uart and pin fopen success\n");
+
+    //config led pin in board
+    struct PinParam pin_parameter;
+    memset(&pin_parameter, 0, sizeof(struct PinParam));
+    pin_parameter.cmd = GPIO_CONFIG_MODE;
+    pin_parameter.pin = BSP_485_DIR_PIN;
+    pin_parameter.mode = GPIO_CFG_OUTPUT;
+
+    struct PrivIoctlCfg ioctl_cfg;
+    ioctl_cfg.ioctl_driver_type = PIN_TYPE;
+    ioctl_cfg.args =  (void *)&pin_parameter;
+
+    if (0 != PrivIoctl(pin_fd, OPE_CFG, &ioctl_cfg)) {
+        printf("ioctl pin fd error %d\n", pin_fd);
+        PrivClose(pin_fd);
+        return;
+    }
+
+    struct SerialDataCfg uart_cfg;
+    memset(&uart_cfg, 0, sizeof(struct SerialDataCfg));
+
+    uart_cfg.serial_baud_rate = BAUD_RATE_115200;
+    uart_cfg.serial_data_bits = DATA_BITS_8;
+    uart_cfg.serial_stop_bits = STOP_BITS_1;
+    uart_cfg.serial_parity_mode = PARITY_NONE;
+    uart_cfg.serial_bit_order = BIT_ORDER_LSB;
+    uart_cfg.serial_invert_mode = NRZ_NORMAL;
+    uart_cfg.serial_buffer_size = SERIAL_RB_BUFSZ;
+    uart_cfg.serial_timeout = 1000;
+    uart_cfg.is_ext_uart = 0;
+
+    ioctl_cfg.ioctl_driver_type = SERIAL_TYPE;
+    ioctl_cfg.args = (void *)&uart_cfg;
+
+    if (0 != PrivIoctl(uart_fd, OPE_INT, &ioctl_cfg))
+    {
+        printf("ioctl uart fd error %d\n", uart_fd);
+        PrivClose(uart_fd);
+        return;
+    }
+
+    struct PinStat pin_dir;
+    pin_dir.pin = BSP_485_DIR_PIN;
+    while (1)
+    {
+        pin_dir.val = GPIO_HIGH;
+        PrivWrite(pin_fd,&pin_dir,0);
+        PrivWrite(uart_fd,"Hello world!\n",sizeof("Hello world!\n"));
+        PrivTaskDelay(100);
+
+        pin_dir.val = GPIO_LOW;
+        PrivWrite(pin_fd,&pin_dir,0);
+        char recv_buff[100];
+        memset(recv_buff,0,sizeof(recv_buff));
+        PrivRead(uart_fd,recv_buff,20);
+        printf("%s",recv_buff);
+        PrivTaskDelay(100);
+    }
+    PrivClose(pin_fd);
+    PrivClose(uart_fd);
+    return;
+    
+}
+
+PRIV_SHELL_CMD_FUNCTION(Test485, a RS485 test sample, PRIV_SHELL_CMD_MAIN_ATTR);
\ No newline at end of file
diff --git a/APP_Framework/Applications/app_test/test_rtc.c b/APP_Framework/Applications/app_test/test_rtc.c
index 683478dd1..3a95c6cea 100644
--- a/APP_Framework/Applications/app_test/test_rtc.c
+++ b/APP_Framework/Applications/app_test/test_rtc.c
@@ -13,7 +13,7 @@ void TestRTC(int argc,char *argv[])
     if(argc>1){
         
         int times = atoi(argv[1]);
-        printf("Time will be printf times %d\n",times);
+        printf("Time will be printf %d times\n",times);
         struct RtcDrvConfigureParam rtc_para;
         rtc_para.rtc_operation_cmd = OPER_RTC_SET_TIME;
         *(rtc_para.time) = 0;
@@ -26,12 +26,12 @@ void TestRTC(int argc,char *argv[])
         rtc_para.rtc_operation_cmd = OPER_RTC_GET_TIME;
         for(size_t i=0;i<times;i++){
             PrivIoctl(rtc_fd,0,&ioctl_cfg);
-            printf("The time now is %x,%d\n",*(rtc_para.time),*(rtc_para.time));
+            printf("The time now is %d\n",*(rtc_para.time));
             PrivTaskDelay(5000);  
         }
-                
     }
     
+    PrivClose(rtc_fd);
     return;
 }
 
diff --git a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/gpio/drv_io_config.c b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/gpio/drv_io_config.c
index f49c62d8f..1bd31c747 100644
--- a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/gpio/drv_io_config.c
+++ b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/gpio/drv_io_config.c
@@ -110,6 +110,10 @@ static struct io_config
     IOCONFIG(BSP_E220_M1_PIN,  HS_GPIO(FUNC_GPIOHS11)),      
 #endif
 
+#ifdef BSP_USING_RS485
+    IOCONFIG(BSP_485_DIR_PIN,HS_GPIO(FUNC_GPIOHS12));
+#endif
+
 #ifdef BSP_USING_LED
     IOCONFIG(BSP_LED_PIN,FUNC_GPIO5);
 #endif
diff --git a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/include/drv_io_config.h b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/include/drv_io_config.h
index 43b7723b1..f48e34c0d 100644
--- a/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/include/drv_io_config.h
+++ b/Ubiquitous/XiZi_IIoT/board/edu-riscv64/third_party_driver/include/drv_io_config.h
@@ -103,6 +103,11 @@ enum HS_GPIO_CONFIG
 #define BSP_E220_M0_PIN 32
 #define BSP_E220_M1_PIN 33
 #endif
+
+#ifdef BSP_USING_RS485
+#define BSP_485_DIR_PIN 24
+#endif
+
 extern int IoConfigInit(void);
 
 #endif