In the current state all the timings work flawlessly but MQ is still 0.0f and GPS is not read

hardware/include/MQ7v2.hpp

@@ -5,6 +5,13 @@
 #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
+};
 
 struct MQ7Data_t
 {
@@ -12,4 +19,5 @@ struct MQ7Data_t
 };
 
 void MQ7_Init();
+bool MQ7_Update();
 MQ7Data_t MQ7_Read();