diff --git a/.vscode/settings.json b/.vscode/settings.json
index 170fe14..d8467fc 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,6 +2,7 @@
     "cmake.sourceDirectory": "/mnt/c/Users/niuyuling/Desktop/raspberry-pico/Danger-alarm/SOFTWARE",
     "C_Cpp.errorSquiggles": "disabled",
     "files.associations": {
-        "cstring": "cpp"
+        "cstring": "cpp",
+        "random": "cpp"
     }
 }
\ No newline at end of file
diff --git a/SOFTWARE/CMakeLists.txt b/SOFTWARE/CMakeLists.txt
index 6b097aa..fe31167 100644
--- a/SOFTWARE/CMakeLists.txt
+++ b/SOFTWARE/CMakeLists.txt
@@ -23,6 +23,7 @@ target_sources(Danger-alarm PRIVATE
     ${CMAKE_CURRENT_LIST_DIR}/Source/DTH11.cpp
     ${CMAKE_CURRENT_LIST_DIR}/Source/HC-12.cpp
     ${CMAKE_CURRENT_LIST_DIR}/Source/ZC13.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/Source/WIFI.c
 )
 
 pico_enable_stdio_uart(Danger-alarm 1)
diff --git a/SOFTWARE/Source/MAIN.cpp b/SOFTWARE/Source/MAIN.cpp
index b399731..6d42708 100644
--- a/SOFTWARE/Source/MAIN.cpp
+++ b/SOFTWARE/Source/MAIN.cpp
@@ -16,10 +16,14 @@
 #include "HC-12.hpp"
 #include "ZC13.hpp"
 
-#ifndef PICO_DEFAULT_LED_PIN
-#warning pio/hello_pio example requires a board with a regular LED
-#define PICO_DEFAULT_LED_PIN 25
+extern "C" {
+    #include "WIFI.h"
+}
 
+
+#ifndef PICO_DEFAULT_LED_PIN
+    #warning pio/hello_pio example requires a board with a regular LED
+    #define PICO_DEFAULT_LED_PIN 25
 #endif
 
 static inline bool uart_rx_program_available(PIO pio, uint sm)
@@ -254,6 +258,42 @@ static void core1_main()
     return;
 }
 
+int main(int argc, char *argv[])
+{
+    stdio_init_all();
+    sleep_ms(1000);
+
+    if (cyw43_arch_init()) {
+        DEBUG_printf("failed to initialise\n");
+        return 1;
+    }
+    cyw43_arch_enable_sta_mode();
+
+    printf("Connecting to Wi-Fi...\n");
+    if (cyw43_arch_wifi_connect_timeout_ms("root", "@aixiao.19960623", CYW43_AUTH_WPA2_AES_PSK, 30000)) {
+        printf("failed to connect.\n");
+        return 1;
+    } else {
+        printf("Connected.\n");
+    }
+
+    while (1)
+    {
+        run_tcp_client_test();
+        sleep_ms(3000);
+    }
+    
+
+
+    cyw43_arch_deinit();
+
+
+
+    return 0;
+}
+
+
+/*
 int main(int argc, char *argv[])
 {
     stdio_init_all();
@@ -310,14 +350,6 @@ int main(int argc, char *argv[])
         }
         watchdog_update();      // 喂狗
 
-        /*
-           if (1 == CH4()) {
-           printf("Kitchen danger (fire) alarm detects CH4!!!\n");
-           light_flashing();
-           _HC_12("Kitchen danger (fire) alarm detects CH4!!!\n");
-           }
-           watchdog_update();      // 喂狗
-         */
 
         // DS18B20
         TEMPERATURE = DS18B20();
@@ -379,3 +411,4 @@ int main(int argc, char *argv[])
 
     return 0;
 }
+*/
\ No newline at end of file
diff --git a/SOFTWARE/Source/WIFI.c b/SOFTWARE/Source/WIFI.c
new file mode 100644
index 0000000..eb23b02
--- /dev/null
+++ b/SOFTWARE/Source/WIFI.c
@@ -0,0 +1,229 @@
+#include "WIFI.h"
+
+#if 0
+static void dump_bytes(const uint8_t *bptr, uint32_t len) {
+    unsigned int i = 0;
+
+    printf("dump_bytes %d", len);
+    for (i = 0; i < len;) {
+        if ((i & 0x0f) == 0) {
+            printf("\n");
+        } else if ((i & 0x07) == 0) {
+            printf(" ");
+        }
+        printf("%02x ", bptr[i++]);
+    }
+    printf("\n");
+}
+#define DUMP_BYTES dump_bytes  // 调试用的字节转储函数
+#else
+#define DUMP_BYTES(A,B)
+#endif
+
+typedef struct TCP_CLIENT_T_ {
+    struct tcp_pcb *tcp_pcb;  // TCP控制块指针
+    ip_addr_t remote_addr;  // 远程地址
+    uint8_t buffer[BUF_SIZE];  // 接收缓冲区
+    int buffer_len;  // 缓冲区当前长度
+    int sent_len;  // 已发送的数据长度
+    bool complete;  // 是否完成测试
+    int run_count;  // 运行次数
+    bool connected;  // 是否已连接
+} TCP_CLIENT_T;
+
+static err_t tcp_client_close(void *arg) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    err_t err = ERR_OK;
+    if (state->tcp_pcb != NULL) {
+        tcp_arg(state->tcp_pcb, NULL);  // 清除回调参数
+        tcp_poll(state->tcp_pcb, NULL, 0);  // 清除轮询回调
+        tcp_sent(state->tcp_pcb, NULL);  // 清除发送回调
+        tcp_recv(state->tcp_pcb, NULL);  // 清除接收回调
+        tcp_err(state->tcp_pcb, NULL);  // 清除错误回调
+        err = tcp_close(state->tcp_pcb);  // 关闭TCP连接
+        if (err != ERR_OK) {
+            DEBUG_printf("close failed %d, calling abort\n", err);  // 如果关闭失败，调用abort
+            tcp_abort(state->tcp_pcb);
+            err = ERR_ABRT;
+        }
+        state->tcp_pcb = NULL;  // 清除TCP控制块指针
+    }
+    return err;
+}
+
+// 操作结果回调
+static err_t tcp_result(void *arg, int status) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    if (status == 0) {
+        DEBUG_printf("test success\n");  // 测试成功
+    } else {
+        DEBUG_printf("test failed %d\n", status);  // 测试失败
+    }
+    state->complete = true;  // 标记测试完成
+    return tcp_client_close(arg);  // 关闭连接
+}
+
+// 轮询回调
+static err_t tcp_client_poll(void *arg, struct tcp_pcb *tpcb) {
+    DEBUG_printf("tcp_client_poll\n");
+    return tcp_result(arg, -1);  // 无响应视为错误
+}
+
+// 错误处理回调
+static void tcp_client_err(void *arg, err_t err) {
+    if (err != ERR_ABRT) {
+        DEBUG_printf("tcp_client_err %d\n", err);  // 打印错误信息
+        tcp_result(arg, err);
+    }
+}
+
+// 连接建立回调
+static err_t tcp_client_connected(void *arg, struct tcp_pcb *tpcb, err_t err) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    if (err != ERR_OK) {
+        printf("connect failed %d\n", err);  // 连接失败
+        return tcp_result(arg, err);
+    }
+    state->connected = true;  // 标记已连接
+    DEBUG_printf("连接成功，准备发送消息！！！\n");  // 连接成功，准备发送消息
+
+    // 定义要发送的字符串
+    const char *message = "PICO W\n";
+    state->buffer_len = strlen(message);  // 设置要发送的字符串长度
+    memcpy(state->buffer, message, state->buffer_len);  // 将字符串复制到缓冲区
+
+    // 发送字符串到服务器
+    err = tcp_write(tpcb, state->buffer, state->buffer_len, TCP_WRITE_FLAG_COPY);
+    if (err != ERR_OK) {
+        DEBUG_printf("发送失败: %d\n", err);  // 发送失败
+        return tcp_result(arg, -1);
+    }
+    DEBUG_printf("发送数据: %s\n", message);  // 打印发送的消息
+
+    memset(state->buffer, 0, state->buffer_len);
+    state->buffer_len = 0;
+
+    return ERR_OK;
+}
+
+err_t tcp_client_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    if (!p) {
+        DEBUG_printf("接收数据失败，p 为 NULL\n");  // 添加调试信息
+        return tcp_result(arg, -1);
+    }
+    // this method is callback from lwIP, so cyw43_arch_lwip_begin is not required, however you
+    // can use this method to cause an assertion in debug mode, if this method is called when
+    // cyw43_arch_lwip_begin IS needed
+    cyw43_arch_lwip_check();
+    if (p->tot_len > 0) {
+        DEBUG_printf("recv %d err %d\n", p->tot_len, err);
+        for (struct pbuf *q = p; q != NULL; q = q->next) {
+            DUMP_BYTES(q->payload, q->len);
+        }
+        // Receive the buffer
+        const uint16_t buffer_left = BUF_SIZE - state->buffer_len;
+        state->buffer_len += pbuf_copy_partial(p, state->buffer + state->buffer_len,
+                                               p->tot_len > buffer_left ? buffer_left : p->tot_len, 0);
+        tcp_recved(tpcb, p->tot_len);
+    }
+
+    // 打印当前缓冲区内容
+    printf("接收数据: %s", state->buffer);
+
+    pbuf_free(p);
+
+    memset(state->buffer, 0, state->buffer_len);
+    state->buffer_len = 0;
+
+    return ERR_OK;
+}
+
+// 发送数据回调
+static err_t tcp_client_sent(void *arg, struct tcp_pcb *tpcb, u16_t len) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    DEBUG_printf("tcp_client_sent %u\n", len);  // 打印发送的数据长度
+    state->sent_len += len;  // 更新已发送的数据长度
+
+    if (state->sent_len >= BUF_SIZE) {
+        state->run_count++;  // 增加运行次数
+        if (state->run_count >= TEST_ITERATIONS) {
+            tcp_result(arg, 0);  // 达到迭代次数，测试成功
+            return ERR_OK;
+        }
+
+        // 准备接收新的数据缓冲区
+        state->buffer_len = 0;
+        state->sent_len = 0;
+        DEBUG_printf("Waiting for buffer from server\n");
+    }
+
+    return ERR_OK;
+}
+
+// 打开TCP连接
+static bool tcp_client_open(void *arg) {
+    TCP_CLIENT_T *state = (TCP_CLIENT_T*)arg;
+    DEBUG_printf("Connecting to %s port %u\n", ip4addr_ntoa(&state->remote_addr), TCP_PORT);
+    state->tcp_pcb = tcp_new_ip_type(IP_GET_TYPE(&state->remote_addr));  // 创建TCP控制块
+    if (!state->tcp_pcb) {
+        DEBUG_printf("failed to create pcb\n");  // 创建失败
+        return false;
+    }
+
+    tcp_arg(state->tcp_pcb, state);  // 设置回调参数
+    tcp_poll(state->tcp_pcb, tcp_client_poll, POLL_TIME_S * 2);  // 设置轮询回调
+    tcp_sent(state->tcp_pcb, tcp_client_sent);  // 设置发送回调
+    tcp_recv(state->tcp_pcb, tcp_client_recv);  // 设置接收回调
+    tcp_err(state->tcp_pcb, tcp_client_err);  // 设置错误回调
+
+    state->buffer_len = 0;  // 初始化缓冲区长度
+
+    // 使用cyw43_arch_lwip_begin/end确保正确锁定
+    cyw43_arch_lwip_begin();
+    err_t err = tcp_connect(state->tcp_pcb, &state->remote_addr, TCP_PORT, tcp_client_connected);  // 尝试连接
+    cyw43_arch_lwip_end();
+
+    return err == ERR_OK;
+}
+
+// 初始化TCP客户端
+static TCP_CLIENT_T* tcp_client_init(void) {
+    TCP_CLIENT_T *state = calloc(1, sizeof(TCP_CLIENT_T));  // 分配内存
+    if (!state) {
+        DEBUG_printf("failed to allocate state\n");  // 分配失败
+        return NULL;
+    }
+    ip4addr_aton(TEST_TCP_SERVER_IP, &state->remote_addr);  // 解析服务器IP地址
+    return state;
+}
+
+// 运行TCP客户端测试
+void run_tcp_client_test(void) {
+    TCP_CLIENT_T *state = tcp_client_init();  // 初始化客户端
+    if (!state) {
+        return;
+    }
+    if (!tcp_client_open(state)) {  // 打开连接
+        tcp_result(state, -1);  // 连接失败
+
+        return;
+    }
+    while(!state->complete) {  // 循环等待测试完成
+#if PICO_CYW43_ARCH_POLL
+        // 如果使用pico_cyw43_arch_poll，需要定期调用cyw43_arch_poll
+        cyw43_arch_poll();
+        // 可以选择休眠直到有工作需要做
+        cyw43_arch_wait_for_work_until(make_timeout_time_ms(1000));
+#else
+        cyw43_arch_poll();
+        // 可以选择休眠直到有工作需要做
+        cyw43_arch_wait_for_work_until(make_timeout_time_ms(1000));
+        
+        
+        // 如果不使用pico_cyw43_arch_poll，可以通过中断在后台处理
+        //sleep_ms(1000);  // 示例中的阻塞操作
+#endif
+    }
+    free(state);  // 释放内存
+}
\ No newline at end of file
diff --git a/SOFTWARE/Source/WIFI.h b/SOFTWARE/Source/WIFI.h
new file mode 100644
index 0000000..48f0f85
--- /dev/null
+++ b/SOFTWARE/Source/WIFI.h
@@ -0,0 +1,26 @@
+#ifndef WIFI_H
+#define WIFI_H
+
+#include <string.h>
+#include <string.h>
+#include <time.h>
+
+#include "pico/stdlib.h"
+#include "pico/cyw43_arch.h"
+
+#include "lwip/pbuf.h"
+#include "lwip/tcp.h"
+
+#define TEST_TCP_SERVER_IP "192.168.9.90"
+#define TCP_PORT 91
+
+#define DEBUG_printf printf
+#define BUF_SIZE 2048
+
+#define TEST_ITERATIONS 10
+#define POLL_TIME_S 5
+
+
+extern void run_tcp_client_test(void);
+
+#endif