public String retreiveEndpoint(String fullExternalDatapoint) {
        if (fullExternalDatapoint == null) return null;

        String externalDatapoint = fullExternalDatapoint;

        switch(fullExternalDatapoint) {
            case 'P006-40170891-O-41':
                return "+AAR+LWA+CVY_SEND";
        }

        if (externalDatapoint.length() > 13) {
            externalDatapoint = fullExternalDatapoint.substring(0,13);
        }

        switch(externalDatapoint) {
            case 'P006-35170342':
                return "+AAR+FLS+M442=FLA_SEND";
            case 'P006-35170443':
                return "+AAR+FLS+M443=FLA_SEND";
            case 'P006-35170545':
                return "+AAR+FLS+M445=FLA_SEND";
            case 'P006-35170646':
                return "+AAR+FLS+M446=FLA_SEND";
            case 'P006-35170749':
                return "+AAR+FLS+M449=FLA_SEND";
            case 'P006-11150101':
                return "+AAR+COAT+M490_SEND";
            case 'P006-12180661':
                return "+AAR+EXT+M461_SEND";
            case 'P006-12180762':
                return "+AAR+EXT+M462_SEND";
            case 'P006-40180690':
                return "+AAR+EXT=DOWN=LIN_SEND";
            case 'P006-30180115':
                return "+AAR+ERF+M415=PRI_SEND";
            case 'P006-30170109':
                return "+AAR+CONV+M009=PRI_SEND";
            case 'P006-30170211':
                return "+AAR+CONV+M411=PRI_SEND";
            case 'P006-40170891':
                return "+AAR+FLS=DOWN=LIN_SEND";
            default:
                return externalDatapoint;
        }
        return null;
    }