 {
     pinMode( PIN_RX, INPUT );
     pinMode( PIN_TX, INPUT );
+    pinMode( PIN_LED, OUTPUT );
+    digitalWrite( PIN_LED, led_state );
 
     delay( STARTUP_DELAY );
 

        const byte rx_byte = (byte) obd_serial.read();

        Serial.write( rx_byte );
    }
}

//
#define PIN_KLINE (12)

#define PIN_LED (13)



static bool led_state = false;


// *****************************************************
