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 RX 26
-#define TX 5
+#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();

hardware/src/lib/sensor/MQ7v2.cpp

@@ -1,22 +1,81 @@
 #include "MQ7v2.hpp"
 
+MQ7State_t mq7State = HEATING;
+uint32_t mq7StateStart = 0; // t_0
+float lastPPM = 0.0f;
+float mq7Samples[MAX_SAMPLES];
+uint8_t sampleIndex = 0;
+
 void MQ7_Init()
 {
     pinMode(MQ7_PIN, INPUT);
+    pinMode(RELAY_CONTROL_PIN, OUTPUT);
+    mq7State = HEATING;
+    mq7StateStart = millis(); // t_0
+    digitalWrite(RELAY_CONTROL_PIN, LOW); // NC
+}
+
+bool MQ7_Update()
+{
+    unsigned long now = millis();
+
+    switch (mq7State) {
+        case HEATING:
+            if (now - mq7StateStart >= 60000) {
+                digitalWrite(RELAY_CONTROL_PIN, HIGH); // NO - lectura
+                mq7State = SAMPLING;
+                mq7StateStart = now;
+            }
+            break;
+
+        case SAMPLING:
+            static uint32_t lastSampleTime = 0;
+            const uint32_t sampleInterval = 1000; // 1 muestra/segundo
+
+            if(now - lastSampleTime >= sampleInterval && 
+                sampleIndex < MAX_SAMPLES)
+            {
+                lastSampleTime = now;   
+
+                int adcValue = analogRead(MQ7_PIN);
+                float voltage = (adcValue / ADC_RES) * VCC;
+
+                if (voltage > 0.1)
+                {
+                    float rs = (VCC - voltage) * RL / voltage;
+                    float ratio = rs / RO;
+                    float ppm = pow(10, (-1.5 * log10(ratio) + 0.8));
+                    mq7Samples[sampleIndex++] = ppm;
+                } 
+                else
+                {
+                    mq7Samples[sampleIndex++] = 0.0f;
+                }
+            }
+
+            if(now - mq7StateStart >= 90000) 
+            {
+                float sum = 0;
+                for(uint8_t i = 0; i < sampleIndex; i++)
+                {
+                    sum += mq7Samples[i];
+                }
+
+                lastPPM = (sampleIndex > 0) ? (sum / sampleIndex) : 0.0f;
+
+                sampleIndex = 0;
+                digitalWrite(RELAY_CONTROL_PIN, LOW); // NC
+                mq7State = HEATING;
+                mq7StateStart = now; // t_0
+                return true;
+            }
+            break;
+    }
+
+    return false;
 }
 
 MQ7Data_t MQ7_Read()
 {
-    int adcValue = analogRead(MQ7_PIN);
+    return {lastPPM};
-    float voltage = (adcValue / ADC_RES) * VCC;
-
-    if (voltage <= 0.1) {
-        return {0.0};
-    }
-
-    float rs = (VCC - voltage) * RL / voltage;
-    float ratio = rs / RO;
-    float ppm = pow(10, (-1.5 * log10(ratio) + 0.8));
-
-    return {ppm};
 }

hardware/src/main.cpp

@@ -5,11 +5,8 @@
 const uint32_t DEVICE_ID = getChipID();
 const char ALL_VEHICLES[] = "Todo tipo de vehiculos";
 const char ELECTRIC_VEHICLES[] = "Solo vehiculos electricos/hibridos";
+const char* currentMessage = nullptr;
 
-TaskTimer bmeTimer{0, 1000};
-TaskTimer mq7Timer{0, 1000};
-TaskTimer gpsTimer{0, 1000};
-TaskTimer printTimer{0, 1000};
 TaskTimer matrixTimer{0, 25};
 
 extern HTTPClient httpClient;
@@ -31,6 +28,7 @@ void setup()
     MQ7_Init();
     Serial.println("Sensor MQ7 inicializado"); 
 
+    // inicializar el estado de la matriz
     writeMatrix(ALL_VEHICLES);
 }
 
@@ -38,6 +36,7 @@ void loop()
 {
     uint32_t now = millis();
 
+    // animación matriz de leds
     if (now - matrixTimer.lastRun >= matrixTimer.interval) {
         if (MAX7219_Animate()) {
             MAX7219_ResetAnimation();
@@ -45,34 +44,21 @@ void loop()
         matrixTimer.lastRun = now;
     }
 
-    if (now - bmeTimer.lastRun >= bmeTimer.interval) {
+    // MQ7 tarda mas y marca el ritmo
+    if (MQ7_Update()) { 
+        mq7Data.co = MQ7_Read().co;
         readBME280();
-        bmeTimer.lastRun = now;
-    }
-
-    if (now - mq7Timer.lastRun >= mq7Timer.interval) {
-        readMQ7();
-        mq7Timer.lastRun = now;
-    }
-
-    if (now - gpsTimer.lastRun >= gpsTimer.interval) {
         readGPS();
-        gpsTimer.lastRun = now;
+        processMQ7();
+        #ifdef DEBUG
+        printAllData();
+        #endif
+        // sendToServer();
     }
-
-    #ifdef DEBUG
-    if (now - printTimer.lastRun >= printTimer.interval) {
-        Serial.print("---------------------\n");
-        Serial.println("Leyendo sensores...");
-        printTimer.lastRun = now;
-    }
-    #endif
 }
 
-void readMQ7()
+void processMQ7()
 {
-    mq7Data = MQ7_Read();
-
     #ifdef DEBUG
     Serial.print("CO: "); Serial.println(mq7Data.co);
     #endif
@@ -91,34 +77,44 @@ void readMQ7()
     }
 }
 
-
 void readBME280()
 {
     bme280Data = BME280_Read();
-    #ifdef DEBUG
-    Serial.print("Presión: "); Serial.print(bme280Data.pressure / 100); Serial.println(" hPa");
-    Serial.print("Temperatura: "); Serial.print(bme280Data.temperature); Serial.println(" °C");
-    Serial.print("Humedad: "); Serial.print(bme280Data.humidity); Serial.println(" %");
-    #endif
 }
 
 void readGPS()
 {
     gpsData = GPS_Read();
-    #ifdef DEBUG
-    Serial.print("Latitud: "); Serial.println(gpsData.lat);
-    Serial.print("Longitud: "); Serial.println(gpsData.lon);
-    #endif
 }
 
 void writeMatrix(const char* message)
 {
+    if (currentMessage == message) return;
+    currentMessage = message;
+
     #ifdef DEBUG
     Serial.println("Escribiendo en el display...");
     #endif
+    
     MAX7219_DisplayText(message, PA_LEFT, 50, 0);
 }
 
+void printAllData()
+{
+    Serial.println("---------------------");
+
+    Serial.print("ID: "); Serial.println(DEVICE_ID, HEX);
+
+    Serial.print("Presión: "); Serial.print(bme280Data.pressure / 100); Serial.println(" hPa");
+    Serial.print("Temperatura: "); Serial.print(bme280Data.temperature); Serial.println(" °C");
+    Serial.print("Humedad: "); Serial.print(bme280Data.humidity); Serial.println(" %");
+
+    Serial.print("Latitud: "); Serial.println(gpsData.lat);
+    Serial.print("Longitud: "); Serial.println(gpsData.lon);
+
+    Serial.print("CO: "); Serial.println(mq7Data.co);
+}
+
 uint32_t getChipID()
 {
     uint32_t chipId = 0;