diff --git a/hardware/include/WifiConnection.hpp b/hardware/include/WifiConnection.hpp
index 35b1f7e..ac204e0 100644
--- a/hardware/include/WifiConnection.hpp
+++ b/hardware/include/WifiConnection.hpp
@@ -3,7 +3,7 @@
 #include <WiFi.h>
 #include <PubSubClient.h>
 
-#define SSID "DIGIFIBRA-D2ys"
-#define WIFI_PASSWORD "4EEATsyTcZ"
+#define SSID "iPhone de Jose"
+#define WIFI_PASSWORD "bombardeenlaus"
 
 int WiFi_Init();
\ No newline at end of file
diff --git a/hardware/include/globals.hpp b/hardware/include/globals.hpp
index 876bcdb..6536edf 100644
--- a/hardware/include/globals.hpp
+++ b/hardware/include/globals.hpp
@@ -1,6 +1,6 @@
 #include <Arduino.h>
 
-#define DEVICE_ROLE ACTUATOR // se cambia entre SENSOR y ACTUATOR
+#define DEVICE_ROLE SENSOR // se cambia entre SENSOR y ACTUATOR
 
 #define MQTT_URI "miarma.net"
 #define API_URI "https://contaminus.miarma.net/api/v1/"
@@ -18,5 +18,5 @@
 #define DEBUG
 
 extern const uint32_t DEVICE_ID;
-extern const int GROUP_ID;
+extern int GROUP_ID;
 extern String currentMessage;
\ No newline at end of file
diff --git a/hardware/include/main.hpp b/hardware/include/main.hpp
index aefb7c2..14cedb7 100644
--- a/hardware/include/main.hpp
+++ b/hardware/include/main.hpp
@@ -46,4 +46,5 @@ void readGPS();
 void writeMatrix(const char *message);
 void printAllData();
 void sendSensorData();
-uint32_t getChipID();
\ No newline at end of file
+uint32_t getChipID();
+int getGroupId(int deviceId);
\ No newline at end of file
diff --git a/hardware/src/lib/sensor/MQ7v2.cpp b/hardware/src/lib/sensor/MQ7v2.cpp
index 9a4e03b..a7ab9b3 100644
--- a/hardware/src/lib/sensor/MQ7v2.cpp
+++ b/hardware/src/lib/sensor/MQ7v2.cpp
@@ -1,5 +1,7 @@
 #include "MQ7v2.hpp"
 
+uint8_t flag = 0;
+
 void MQ7_Init()
 {
     pinMode(MQ7_A0, INPUT);
@@ -24,12 +26,14 @@ MQ7Data_t MQ7_Read_Fake()
     float ppm;
     bool d0;
 
-    if (random(0, 100) < 50) {
-        ppm = random(80, 500);  // valores entre 101 y 500 ppm
+    if (flag == 0) {
+        ppm = 100.0f;  // valores entre 101 y 500 ppm
         d0 = true;
+        flag = 1;
     } else {
-        ppm = random(10, 79);   // valores entre 10 y 99 ppm
+        ppm = 10.0f;   // valores entre 10 y 99 ppm
         d0 = false;
+        flag = 0;
     }
 
     return {ppm, d0};
diff --git a/hardware/src/main.cpp b/hardware/src/main.cpp
index 209855e..a2dbb93 100644
--- a/hardware/src/main.cpp
+++ b/hardware/src/main.cpp
@@ -2,10 +2,10 @@
 
 const uint32_t DEVICE_ID = getChipID();
 const String mqttId = "CUS-" + String(DEVICE_ID, HEX);
-const int GROUP_ID = 1;
+int GROUP_ID;
 
-TaskTimer globalTimer{0, 60000};
-TaskTimer mqttTimer{0, 5000};
+TaskTimer globalTimer{0, 10000};
+TaskTimer mqttTimer{0, 2500};
 
 #if DEVICE_ROLE == ACTUATOR
 TaskTimer matrixTimer{0, 25};
@@ -39,6 +39,7 @@ void setup()
     {
 
 #if DEVICE_ROLE == SENSOR
+        GROUP_ID = getGroupId(DEVICE_ID);
         BME280_Init();
         Serial.println("Sensor BME280 inicializado");
         GPS_Init();
@@ -119,7 +120,8 @@ void loop()
 void writeMatrix(const char *message)
 {
 #ifdef DEBUG
-    Serial.println("Escribiendo mensaje: "); Serial.print(message);
+    Serial.println("Escribiendo mensaje: ");
+    Serial.print(message);
 #endif
     MAX7219_DisplayText(message, PA_LEFT, 50, 0);
 }
@@ -139,7 +141,7 @@ void readBME280()
 
 void readGPS()
 {
-    gpsData = GPS_Read_Fake();
+    gpsData = GPS_Read();
 }
 
 void printAllData()
@@ -218,3 +220,11 @@ uint32_t getChipID()
 #endif
     return chipId;
 }
+
+int getGroupId(int deviceId)
+{
+    String url = String(API_URI) + "groups/" + GROUP_ID + "/devices/" + String(DEVICE_ID, HEX) + "/actuators/" + MAX7219_ID + "/status";
+    getRequest(url, response);
+    MAX7219Status_t statusData = deserializeActuatorStatus(httpClient, httpClient.GET());
+    currentMessage = statusData.actuatorStatus;
+}
\ No newline at end of file