 }
 
 
+

  switch (data_loop_index) {
  case 1: // 4 degree index
    data_4deg_index = inByte - 0xA0;
    if (data_4deg_index == 0) {
      angle = 0;
      if (ledState) {
        ledState = LOW;
      } 

    Serial.println(F(" "));
  }
  else {
    xv_config.rpm_setpoint = sVal;
    Serial.println(F(" "));
    Serial.print(F("New RPM setpoint: "));
    Serial.println(sVal);
