Refactor GPS and MQ7 sensor implementations: update function signatures, improve initialization, and streamline data reading logic

hardware/include/MQ7v2.hpp

@@ -1,23 +1,15 @@
 #include <Arduino.h>
 
-#define MQ7_PIN 34
-#define VCC 5.0
-#define ADC_RES 1023.0
-#define RL 10000.0     // 10kΩ
-#define RO 10000.0     // Resistencia del aire limpio
-#define RELAY_CONTROL_PIN 2
-#define MAX_SAMPLES 90
-
-enum MQ7State_t
-{
-    HEATING, SAMPLING
-};
+#define MQ7_A0 34
+#define MQ7_D0 35
+#define R0 20000
+#define RL 10000
 
 struct MQ7Data_t
 {
     float co;
+    bool threshold;
 };
 
 void MQ7_Init();
-bool MQ7_Update();
 MQ7Data_t MQ7_Read();