diff --git a/applications/app/TW202_Module_traffic_light/BUILD.gn b/applications/app/TW202_Module_traffic_light/BUILD.gn
new file mode 100755
index 00000000..9358c88f
--- /dev/null
+++ b/applications/app/TW202_Module_traffic_light/BUILD.gn
@@ -0,0 +1,24 @@
+# Copyright (c) 2021 Talkweb Co.,ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+static_library("module_traffic_light_example") {
+    sources = [
+        "traffic_light_example.c"
+    ]
+
+    include_dirs = [
+        "//utils/native/lite/include",
+        "//kernel/liteos_m/kal/cmsis",
+        "//base/iot_hardware/peripheral/interfaces/kits"
+    ]
+}
diff --git a/applications/app/TW202_Module_traffic_light/README.md b/applications/app/TW202_Module_traffic_light/README.md
new file mode 100755
index 00000000..85a96092
--- /dev/null
+++ b/applications/app/TW202_Module_traffic_light/README.md
@@ -0,0 +1,75 @@
+# OpenHarmony模组开发-灯光控制和蜂鸣器使用
+
+本案例使用到了四组LED灯、蜂鸣器和按键。通过按键每次按下来控制不同的灯亮以及改变蜂鸣器的状态、实现蜂鸣器的鸣叫。
+
+# 目录结构：
+
+## src
+	traffic_light_example.c            --灯光和蜂鸣器控制源文件
+
+
+# 相关API介绍
+  ## traffic_light_example demo
+	IoTWatchDogDisable： 关闭看门狗函数
+	
+	IoTGpioInit(unsigned int id)： 初始化GPIO
+		参数说明：
+		–id Indicates the GPIO pin number.
+		
+	IotIoSetFunc(IOT_GPIO_IO_NAME id, unsigned char val)：	注册功能
+		参数说明：
+		-id Indicates the GPIO pin number.
+		-val 复用功能
+		
+	IoTGpioSetDir(unsigned int id, IotGpioDir dir)：Sets the direction for a GPIO pin.
+		参数说明：
+		-id Indicates the GPIO pin number.
+		-dir IO方向
+		
+	IotIoSetPull(IOT_GPIO_IO_NAME id, IOT_IO_PULL val)：设置GPIO为上拉或下拉
+		参数说明：
+		-id Indicates the GPIO pin number.
+		-val 上拉或下拉	
+		
+	IoTGpioRegisterIsrFunc(unsigned int id, IotGpioIntType intType, IotGpioIntPolarity intPolarity, GpioIsrCallbackFunc func, char *arg)：	Enables the interrupt feature for a GPIO pin.
+		参数说明：
+		-id Indicates the GPIO pin number.
+		-intType Indicates the interrupt type.
+		-intPolarity Indicates the interrupt polarity.
+		-func Indicates the interrupt callback function.
+		-arg Indicates the pointer to the argument used in the interrupt callback function.
+		
+	IoTGpioSetOutputVal(unsigned int id, IotGpioValue val)：Sets the output level value for a GPIO pin.
+		参数说明：
+		-id	Indicates the GPIO pin number.
+		-val Indicates the output level value.
+		
+	IoTPwmInit(unsigned int port)： Initializes a PWM device.
+		参数说明：
+		-port Indicates the port number of the PWM device
+		
+	osThreadNew(osThreadFunc_t func, void *argument, const osThreadAttr_t *attr)：Creates an active thread. 
+		参数说明：
+		-func Indicates the entry of the thread callback function.
+		-argument Indicates the pointer to the argument passed to the thread.
+		-attr Indicates the thread attributes.	
+		
+	IoTPwmStart(unsigned int port, unsigned short duty, unsigned int freq)：Starts PWM signal output from a specified port based on the given output frequency and duty cycle.
+		参数说明：
+		-port Indicates the port number of the PWM device.
+		-duty Indicates the duty cycle for PWM signal output. The value ranges from 1 to 99.
+		-freq Indicates the frequency for PWM signal output.
+		
+	IoTPwmStop(unsigned int port)：Stops PWM signal output from a specified port.
+		参数说明：
+		-port Indicates the port number of the PWM device.		
+	
+		
+
+# 运行结果
+    先每个灯闪烁一下，亮2秒灭1秒，2遍，测试4个灯是否正常。
+    按键每按下一次，切换一次灯亮同时改变蜂鸣器状态，蜂鸣器状态为1时，蜂鸣。
+
+
+
+
diff --git a/applications/app/TW202_Module_traffic_light/traffic_light_example.c b/applications/app/TW202_Module_traffic_light/traffic_light_example.c
new file mode 100755
index 00000000..a100e409
--- /dev/null
+++ b/applications/app/TW202_Module_traffic_light/traffic_light_example.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2021 Talkweb Co.,ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include "ohos_init.h"
+#include "cmsis_os2.h"
+#include "iot_gpio.h"
+#include "iot_watchdog.h"
+#include "iot_pwm.h"
+#include "hi_pwm.h"
+#include "hi_io.h"
+
+//蜂鸣器PWM端口号
+#define HI_PWM_BEEP_PORT HI_PWM_PORT_PWM0
+//蜂鸣频率
+#define PWM_BEEP_FREQ (4 * 1000)
+//蜂鸣占空比
+#define PWM_BEEP_DUTY (50)
+
+// 蜂鸣器开关状态
+static int gBeepState = 0;
+
+typedef struct
+{
+    IOT_GPIO_IO_NAME gpioName; //灯的GPIO
+    int ioFunc;                //IO hi_io_func_gpio
+    IotGpioDir dir;            //GPIO 方向
+    IotGpioValue value;        //灯当前值
+} TrafficLight;
+//三色灯的状态数组，每个值代表某个颜色显示还是不显示
+// 当前灯序号
+static int gCurrentLightId = 0;
+static TrafficLight lights[] = {
+    //red
+    {IOT_GPIO_IO_GPIO_10,
+     HI_IO_FUNC_GPIO_10_GPIO,
+     IOT_GPIO_DIR_OUT,
+     IOT_GPIO_VALUE0},
+    //GREEN
+    {IOT_GPIO_IO_GPIO_11,
+     HI_IO_FUNC_GPIO_11_GPIO,
+     IOT_GPIO_DIR_OUT,
+     IOT_GPIO_VALUE0},
+    //BLUE
+    {IOT_GPIO_IO_GPIO_12,
+     HI_IO_FUNC_GPIO_12_GPIO,
+     IOT_GPIO_DIR_OUT,
+     IOT_GPIO_VALUE0},
+    //WHITE
+    {IOT_GPIO_IO_GPIO_5,
+     HI_IO_FUNC_GPIO_5_GPIO,
+     IOT_GPIO_DIR_OUT,
+     IOT_GPIO_VALUE0}};
+#define MAX_LIGHTS (sizeof(lights) / sizeof(lights[0]))
+
+/**
+ *  按键回调。每按一下，亮某个颜色，其他颜色不亮。同时控制蜂鸣器状态
+ * \param   arg 回调参数
+ */
+static void
+OnKeyPressed(char *arg)
+{
+    (void)arg;
+
+    printf("key pressed c\n");
+
+    //只亮当前灯亮
+    for (int i = 0; i < MAX_LIGHTS; i++)
+    {
+        if (i == gCurrentLightId)
+        {
+            lights[i].value = IOT_GPIO_VALUE1;
+        }
+        else
+        {
+            lights[i].value = IOT_GPIO_VALUE0;
+        }
+    }
+    //按一次键 切换一次当前灯
+    gCurrentLightId++;
+    if (gCurrentLightId == MAX_LIGHTS)
+    {
+        gCurrentLightId = 0;
+    }
+
+    //开关一次蜂鸣器
+    gBeepState = !gBeepState;
+}
+
+/**
+ * 线程入口
+ * \param  arg 线程参数
+ *
+ */
+static void *LightTaskEntry(const char *arg)
+{
+    int i, j;
+    (void)arg;
+
+    // 测试灯功能是否正常
+    // 先每个灯闪烁一下，亮2秒灭1秒，2遍
+    for (i = 0; i <= 1; i++)
+    {
+        for (j = 0; j < MAX_LIGHTS; j++)
+        {
+            IoTGpioSetOutputVal(lights[j].gpioName, IOT_GPIO_VALUE1);
+            usleep(200 * 1000);
+
+            IoTGpioSetOutputVal(lights[j].gpioName, IOT_GPIO_VALUE0);
+            usleep(100 * 1000);
+        }
+    }
+
+    //线程任务循环
+    while (1)
+    {
+        // 每个灯的状态输出到GPIO
+        for (i = 0; i < MAX_LIGHTS; i++)
+        {
+            IoTGpioSetOutputVal(lights[i].gpioName, lights[i].value);
+        }
+
+        // 根据蜂鸣器状态控制
+        if (gBeepState)
+        {
+            // 第二个参数duty分频系数，第三个参数freq，160M时钟，
+            // freq，选择40K，占空达到一半，输出的是4K频率
+            IoTPwmStart(HI_PWM_BEEP_PORT, PWM_BEEP_DUTY, PWM_BEEP_FREQ); //(WIFI_IOT_PWM_PORT_PWM0, 20*1000, 40*1000);
+        }
+        else
+        {
+            IoTPwmStop(HI_PWM_BEEP_PORT);
+        }
+    }
+
+    return NULL;
+}
+
+// 四色显示+蜂鸣。交通灯板，四色等对应
+//red:GPIO10
+//GREEN GPIO11
+//YELLOW GPIO12
+//WHITE GPIO13，
+//蜂鸣器GPIO09/PWM0，按键中断GPIO08
+static void LightExampleEntry(void)
+{
+    IoTWatchDogDisable();
+    //初始化灯的 GPIO 状态
+    for (int i = 0; i < MAX_LIGHTS; i++)
+    {
+        TrafficLight *l = &lights[i];
+        IoTGpioInit(l->gpioName);
+        //注册功能
+        IotIoSetFunc(l->gpioName, l->ioFunc);
+
+        //注册io方向
+        IoTGpioSetDir(l->gpioName, l->dir);
+    }
+    //按键处理
+    IoTGpioInit(IOT_GPIO_IO_GPIO_8);
+    IotIoSetFunc(IOT_GPIO_IO_GPIO_8, HI_IO_FUNC_GPIO_8_GPIO);
+    //上升
+    IotIoSetPull(IOT_GPIO_IO_GPIO_8, IOT_IO_PULL_UP);
+
+    IoTGpioSetDir(IOT_GPIO_IO_GPIO_8, IOT_GPIO_DIR_IN);
+    //注册按键回调
+    IoTGpioRegisterIsrFunc(IOT_GPIO_IO_GPIO_8, IOT_INT_TYPE_EDGE, IOT_GPIO_EDGE_RISE_LEVEL_HIGH, OnKeyPressed, NULL);
+
+    //蜂鸣器GPIO09/PWM0
+    IotIoSetFunc(IOT_GPIO_IO_GPIO_9, HI_IO_FUNC_GPIO_9_PWM0_OUT);
+    IoTGpioSetOutputVal(IOT_GPIO_IO_GPIO_9, IOT_GPIO_DIR_OUT);
+    // 初始化PWM设备，这里是蜂鸣器
+    IoTPwmInit(HI_PWM_BEEP_PORT);
+
+    // 设置线程属性
+    osThreadAttr_t attr;
+    attr.name = "TrafficTask";
+    attr.attr_bits = 0U;
+    attr.cb_mem = NULL;
+    attr.cb_size = 0U;
+    attr.stack_mem = NULL;
+    attr.stack_size = 1024;
+    attr.priority = osPriorityNormal;
+
+    // 开启线程，执行LED任务。开启线程，避免主线程阻塞
+    if (osThreadNew((osThreadFunc_t)LightTaskEntry, NULL, &attr) == NULL)
+    {
+        printf("TrafficLight thread   Create failed.");
+    }
+}
+
+SYS_RUN(LightExampleEntry);