添加 MQ-2 传感器支持，初始化 ADC 通道并读取气体浓度

main/main.cpp

@@ -19,6 +19,7 @@
 #include "esp_efuse_table.h"
 #include "bh1750_use.h"
 #include "aht30.h"
+#include "MQ-2.h"
 
 #define TAG "MAIN"
 
@@ -28,6 +29,7 @@ typedef struct
     float lux;
     float temp;
     float humidity;
+    float gas_percent;
 } env_data_t;
 
 static env_data_t s_env_data;
@@ -109,12 +111,15 @@ extern "C" void app_main(void)
     aht30_handle_t aht30_dev = NULL;
     ESP_ERROR_CHECK(aht30_create(i2c_bus, AHT30_I2C_ADDRESS, &aht30_dev));
 
+    // MQ-2 使用 ADC(GPIO8)
+    ESP_ERROR_CHECK(mq2_init());
+
     // 6. 创建传感器读取任务
     xTaskCreate([](void *arg)
                 {
         aht30_handle_t aht30 = (aht30_handle_t)arg;
         for (;;) {
-            float lux = 0.0f, temp = 0.0f, hum = 0.0f;
+            float lux = 0.0f, temp = 0.0f, hum = 0.0f, gas_percent = 0.0f;
             // 读取 BH1750
             if (bh1750_user_read(&lux) == ESP_OK) {
                 set_var_light_val(lux);
@@ -124,6 +129,17 @@ extern "C" void app_main(void)
                 set_var_temp(temp);
                 set_var_humity_val(hum);
             }
+
+            // 读取 MQ-2，更新空气质量变量
+            if (mq2_read_percent(&gas_percent) == ESP_OK) {
+                set_var_air_quity(gas_percent);
+
+                if (s_env_data_lock) {
+                    xSemaphoreTake(s_env_data_lock, portMAX_DELAY);
+                    s_env_data.gas_percent = gas_percent;
+                    xSemaphoreGive(s_env_data_lock);
+                }
+            }
             
 
             // 数据存入共享结构体