diff --git a/.vscode/settings.json b/.vscode/settings.json
index 7b418a5..170fe14 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,7 @@
 {
     "cmake.sourceDirectory": "/mnt/c/Users/niuyuling/Desktop/raspberry-pico/Danger-alarm/SOFTWARE",
-    "C_Cpp.errorSquiggles": "disabled"
+    "C_Cpp.errorSquiggles": "disabled",
+    "files.associations": {
+        "cstring": "cpp"
+    }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index cfe2907..ea3eac0 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,8 @@
     apt install cmake gcc-arm-none-eabi gcc g++
     apt install gdb-multiarch automake autoconf build-essential texinfo libtool libftdi-dev libusb-1.0-0-dev
     
+    # RP2040 SDK 版本构建
+    cd ~
     git clone https://git.aixiao.me/aixiao/Danger-alarm.git
     cd Danger-alarm
     git submodule init
@@ -29,8 +31,13 @@
     cmake -DPICO_BOARD=pico_w ..
     make
 
+    # FreeRTOS 版本构建
+    cd ~/Danger-alarm/SOFTWARE-FreeRTOS
+    mkdir build
+    cmake -DPICO_BOARD=pico_w .. && make -j4
 
-    # 树莓派Zero W 433MHZ HC-12接收服务端构建
+
+    # 树莓派Zero W 433MHZ HC-12接收服务端构建(需要自己设置Raspberry Pi 串口)
     apt install libmysqlclient-dev
     cd ~
     git clone https://github.com/WiringPi/WiringPi.git
diff --git a/SOFTWARE-FreeRTOS/Source/DS18B20.cpp b/SOFTWARE-FreeRTOS/Source/DS18B20.cpp
index 62e6cc1..7dcc182 100644
--- a/SOFTWARE-FreeRTOS/Source/DS18B20.cpp
+++ b/SOFTWARE-FreeRTOS/Source/DS18B20.cpp
@@ -10,6 +10,7 @@ void DS18B20(void *pvParameters)
 {
     // One_wire 第三方库方法
     float TEMPERATURE = -1;
+    char TEMPERATURE_TEMP[BUFER] = { 0 };
     One_wire one_wire(DS18B20_PIN);
     one_wire.init();
     rom_address_t address {
@@ -23,19 +24,24 @@ void DS18B20(void *pvParameters)
 
     
         one_wire.single_device_read_rom(address);
-        one_wire.convert_temperature(address, true, false);
+        int delay_time = one_wire.convert_temperature(address, true, false);
+        //printf("Conversion delay time: %d ms\n", delay_time);
+
         TEMPERATURE = one_wire.temperature(address);
 
-        sleep_ms(1000);
         printf("Device Address: %02x%02x%02x%02x%02x%02x%02x%02x DS18B20 Temperature: %3.1f°C\n", \
                 address.rom[0], address.rom[1], address.rom[2], address.rom[3], address.rom[4], \
                 address.rom[5], address.rom[6], address.rom[7], one_wire.temperature(address));
-
+                
+        if (TEMPERATURE == -1000) {
+            continue;
+        }
+        
         if (TEMPERATURE != 85) {
-                char TEMPERATURE_TEMP[BUFER] = { 0 };
+                
                 sprintf(TEMPERATURE_TEMP, "Temperature: %.3f°C\n", TEMPERATURE);
                 _HC_12(TEMPERATURE_TEMP);
-
+                memset(TEMPERATURE_TEMP, 0, BUFER);
                 TEMPERATURE = -1;
         }
 /*
@@ -45,7 +51,7 @@ void DS18B20(void *pvParameters)
 */
         //_printTaskStackHighWaterMark("DS18B20");
         //watchdog_update();                  // 喂狗
-        vTaskDelay(pdMS_TO_TICKS(3000));    // 非阻塞延时
+        vTaskDelay(pdMS_TO_TICKS(5000));    // 非阻塞延时
     }
     
     return ;
diff --git a/SOFTWARE-FreeRTOS/Source/DS18B20.hpp b/SOFTWARE-FreeRTOS/Source/DS18B20.hpp
index d9f2e41..7d0ac14 100644
--- a/SOFTWARE-FreeRTOS/Source/DS18B20.hpp
+++ b/SOFTWARE-FreeRTOS/Source/DS18B20.hpp
@@ -7,6 +7,7 @@
 #include "semphr.h"
 #include "queue.h"
 
+#include <cstring>
 #include <cstdio>
 #include <stdbool.h>
 #include "pico/stdlib.h"
diff --git a/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp b/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp
index c4c8dee..5839579 100644
--- a/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp
+++ b/SOFTWARE-FreeRTOS/Source/MHZ14B.cpp
@@ -20,7 +20,8 @@ static uint16_t MH_Z14B(int *MH_Z14B_DATA_IS_OK)
     // 0x86 读气体浓度值
     uint8_t CMD[9] = { 0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79 };
     uart_write_blocking(UART1, CMD, 9);
-    sleep_ms(200);
+    //sleep_ms(200);
+    vTaskDelay(pdMS_TO_TICKS(200));    // 非阻塞延时
 
     // 读取
     uint8_t CO2_DATA[9] = { 0 };
@@ -41,12 +42,14 @@ static uint16_t MH_Z14B(int *MH_Z14B_DATA_IS_OK)
         // 校准传感器 零点 （ZERO）
         uint8_t ZERO[] = { 0XFF, 0X01, 0X87, 0X00, 0X00, 0X00, 0X00, 0X00, 0X78 };
         uart_write_blocking(UART1, ZERO, 9);
-        sleep_ms(200);
+        //sleep_ms(200);
+        vTaskDelay(pdMS_TO_TICKS(200));    // 非阻塞延时
 
         // 校准传感器 跨度点 （SPAN）
         uint8_t SPAN[] = { 0XFF, 0X01, 0X88, 0X07, 0XD0, 0X00, 0X00, 0X00, 0XA0 };
         uart_write_blocking(UART1, SPAN, 9);
-        sleep_ms(200);
+        //sleep_ms(200);
+        vTaskDelay(pdMS_TO_TICKS(200));    // 非阻塞延时
 
         *MH_Z14B_DATA_IS_OK = 0;
         printf("CO2 concentration reading failed!\n");
@@ -58,8 +61,9 @@ static uint16_t MH_Z14B(int *MH_Z14B_DATA_IS_OK)
 
 void CO2(void *pvParameters)
 {
-    uint16_t CO2_DATA = -1;
+    uint16_t CO2_DATA = 0;
     int MH_Z14B_DATA_IS_OK = 0;
+    char CO2_DATA_TEMP[BUFER] = { 0 };
     MH_Z14B_INIT();
     _printTaskStackHighWaterMark("CO2");
 
@@ -67,16 +71,16 @@ void CO2(void *pvParameters)
         CO2_DATA = MH_Z14B(&MH_Z14B_DATA_IS_OK);
          if (CO2_DATA != -1 && MH_Z14B_DATA_IS_OK == 1) {
             printf("CO2 Concentration: %d ppm\n", CO2_DATA);
-            
-            char CO2_DATA_TEMP[BUFER] = { 0 };
-            sprintf(CO2_DATA_TEMP, "CO2 Concentration: %d ppm\n", CO2_DATA);
+
+            snprintf(CO2_DATA_TEMP, BUFER, "CO2 Concentration: %d ppm\n", CO2_DATA);
             _HC_12(CO2_DATA_TEMP);
+            memset(CO2_DATA_TEMP, 0, BUFER);
         }
         
         //_printTaskStackHighWaterMark("CO2");
         watchdog_update();                  // 喂狗
         
-        vTaskDelay(pdMS_TO_TICKS(3000)); // 非阻塞延时
+        vTaskDelay(pdMS_TO_TICKS(5000)); // 非阻塞延时
         printf("\n");
     }
     
diff --git a/SOFTWARE-FreeRTOS/Source/MHZ14B.hpp b/SOFTWARE-FreeRTOS/Source/MHZ14B.hpp
index 4defe7b..da4031d 100644
--- a/SOFTWARE-FreeRTOS/Source/MHZ14B.hpp
+++ b/SOFTWARE-FreeRTOS/Source/MHZ14B.hpp
@@ -7,6 +7,7 @@
 #include "semphr.h"
 #include "queue.h"
 
+#include <cstring>
 #include "pico/stdlib.h"
 #include "hardware/clocks.h"
 #include "hardware/watchdog.h"
diff --git a/SOFTWARE-FreeRTOS/Source/ZC13.cpp b/SOFTWARE-FreeRTOS/Source/ZC13.cpp
index 26b9500..a24fdc9 100644
--- a/SOFTWARE-FreeRTOS/Source/ZC13.cpp
+++ b/SOFTWARE-FreeRTOS/Source/ZC13.cpp
@@ -105,18 +105,19 @@ int ZC13(const char *model)
 void CH4(void *pvParameters)
 {
     ZC13_INIT();
+    char CH4_DATA[BUFER] = { 0 };
     _printTaskStackHighWaterMark("CH4");
 
     while (1)
     {
         
-        char CH4_DATA[BUFER] = { 0 };
-        sprintf(CH4_DATA, "CH4 Concentration: %d\n", ZC13("ZC05"));
+        snprintf(CH4_DATA, BUFER, "CH4 Concentration: %d\n", ZC13("ZC05"));
         _HC_12(CH4_DATA);
+        memset(CH4_DATA, 0, BUFER);
         
         //_printTaskStackHighWaterMark("CH4");
         //watchdog_update();                  // 喂狗
-        vTaskDelay(pdMS_TO_TICKS(3000));    // 非阻塞延时
+        vTaskDelay(pdMS_TO_TICKS(5000));    // 非阻塞延时
     }
     
     return ;
diff --git a/SOFTWARE-FreeRTOS/Source/ZC13.hpp b/SOFTWARE-FreeRTOS/Source/ZC13.hpp
index 4b3829f..9f89b1d 100644
--- a/SOFTWARE-FreeRTOS/Source/ZC13.hpp
+++ b/SOFTWARE-FreeRTOS/Source/ZC13.hpp
@@ -7,6 +7,7 @@
 #include "semphr.h"
 #include "queue.h"
 
+#include <cstring>
 #include <stdio.h>
 #include <strings.h>
 #include "pico/stdlib.h"
diff --git a/SOFTWARE-FreeRTOS/Source/ZE07CO.cpp b/SOFTWARE-FreeRTOS/Source/ZE07CO.cpp
index 97716df..9b4edec 100644
--- a/SOFTWARE-FreeRTOS/Source/ZE07CO.cpp
+++ b/SOFTWARE-FreeRTOS/Source/ZE07CO.cpp
@@ -21,6 +21,7 @@ static uint16_t ZE07CO(int ANSWER, int *ZE07_CO_DATA_IS_OK)
         static uint8_t _ANSWER[9] = { 0xFF, 0x01, 0x78, 0x41, 0x00, 0x00, 0x00, 0x00, 0x46 };
         uart_write_blocking(UART0, _ANSWER, 9);
         sleep_ms(100);
+        
     }
     
     if (ANSWER == 2) {
@@ -81,7 +82,7 @@ void CO(void *pvParameters)
         
         //_printTaskStackHighWaterMark("CO");
         //watchdog_update();                  // 喂狗
-        vTaskDelay(pdMS_TO_TICKS(3000)); // 非阻塞延时
+        vTaskDelay(pdMS_TO_TICKS(5000)); // 非阻塞延时
     }
     
     return;