unsigned long lastUploadTime = 0UL; //Don't change. Used to determine if samples need to be uploaded.
const unsigned long updateFrequency = 20000UL;    // Update frequency in milliseconds (20000 = 20 seconds).

void setup() {

}

void loop() {

  unsigned long now = millis();
  if(now - lastUploadTime > updateFrequency)
  {
    lastUploadTime = now;

    FuelGauge fuel;
    char voltageBuf[15] = {0}; //Initialize buffer to nulls
    String(fuel.getVCell()).toCharArray(voltageBuf,10); //Convert float to string

    Spark.publish("f", voltageBuf, 60, PRIVATE);
  }


}