 #include "FreqCount.h"
 
 #define SEND_INTERVAL 30 // Interval between consecutive data sends (in seconds)
+
+// Defines to enable or disable sensors
+#define HUMIDITY_SENSOR 1
+#define AMBIENT_TEMPERATURE_SENSOR 0
+#define PRESSURE_SENSOR 0
+#define LIGHT_LEVEL_SENSOR 0
+#define PH_SENSOR 1
+#define ORP_SENSOR 1
+#define EC_SENSOR 1
+#define WATER_TEMPERATURE_SENSOR 1
 
 // Constants
 // Digital I/O pins

    sprintf(&buffer[len], "Pa=");
    len = strlen(buffer);
    dtostrf(pressure, 1, 0, &buffer[len]);

    // Add light level 
    len = strlen(buffer);
    buffer[len] = ';';

      SYSTEM_VOLTAGE * 1000 / 1024.0);
  orp = (orp / 75.0) - ORP_OFFSET;
  digitalWrite(S2_EN, HIGH);
#endif // ORP_SENSOR

#if PH_SENSOR
  // Calc pH
  delay(500);
  digitalWrite(S3_EN, LOW);
