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

hardware/include/BMP280.hpp

@@ -1,8 +0,0 @@
-#include <Wire.h>
-#include <BMP280_DEV.h>
-
-#define I2C_BMP280_ADDRESS 0x76
-
-void BMP280_Init();
-uint8_t BMP280_DataReady();
-void BMP280_Read();

hardware/include/GPS.hpp

@@ -1,7 +1,7 @@
 #include "TinyGPSPlus.h"
 
-#define RX 4
-#define TX 5
+#define RX 26
+#define TX 14
 
 struct GPSData_t
 {

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();

hardware/include/main.hpp

@@ -28,8 +28,9 @@ enum AirQualityStatus {
     BAD
 };
 
-void readMQ7();
+void processMQ7();
 void readBME280();
 void readGPS();
 void writeMatrix(const char* message);
+void printAllData();
 uint32_t getChipID();