diff --git a/applications/sensor.c b/applications/sensor.c
index 9f575bc..c2f38c8 100644
--- a/applications/sensor.c
+++ b/applications/sensor.c
@@ -8,6 +8,7 @@
 #include <rtdevice.h>
 #include <drv_gpio.h>
 #include "status.h"
+#include "math.h"
 
 rt_thread_t Sensor_Thread = RT_NULL;
 
@@ -35,6 +36,7 @@ float ADC_air;
 float ADC_PM25;
 float ADC_pressure;
 
+#define MQ2_READ_TIMES 10
 float Air_Read()
 {
     rt_adc_device_t adc_dev; /* ADC 设备句柄 */
@@ -48,6 +50,28 @@ float Air_Read()
 
     return value;
 }
+float MQ2_GetData_PPM(void)
+{
+	
+	float  tempData = 0;
+	
+
+	for (uint8_t i = 0; i < MQ2_READ_TIMES; i++)
+	{
+		tempData += Air_Read();;
+		rt_thread_mdelay(5);;
+	}
+	tempData /= MQ2_READ_TIMES;
+	
+	float Vol = (tempData*5/4096);
+	float RS = (5-Vol)/(Vol*0.5);
+	float R0=6.64;
+	
+	float ppm = pow(11.5428*R0/RS, 0.6549f);
+	
+	return ppm;
+
+}
 float PM25_Read()
 {
     rt_adc_device_t adc_dev; /* ADC 设备句柄 */
@@ -138,7 +162,7 @@ static void sensor_thread(void *parameter)
 {
     while (1)
     {
-        ADC_air = Air_Read();              // 空气质量传感器数值    0-4095    表示从差到优秀
+        ADC_air = MQ2_GetData_PPM();              // 空气质量传感器数值    0-4095    表示从差到优秀
         ADC_PM25 = Get_PM25_Average_Data(); // PM2.5传感器数值0-500  表示从优秀到查差
         ADC_pressure = Pressure_Read();             // 压力传感器数值     0-4095    表示从差到优秀
         LOG5("ADC_air:%f,ADC_PM25:%f,ADC_pressure:%f", ADC_air, ADC_PM25, ADC_pressure);