     sprintf(&buffer[len], "mV=");
     len = strlen(buffer);
     dtostrf(orp, 1, 2, &buffer[len]);
-
+#endif // ORP_SENSOR
+
+#if EC_SENSOR
     // Add ec 
     len = strlen(buffer);
     buffer[len] = ';';


    // Use dtostrf now to print data to the buffer.

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

    sprintf(&buffer[len], "E=");
    len = strlen(buffer);
    dtostrf(light_lvl, 1, 0, &buffer[len]);
#endif // LIGHT_LEVEL_SENSOR

#if PH_SENSOR
    // Add ph 
    len = strlen(buffer);
    buffer[len] = ';';
