The two blue LEDs are for monitoring the data received & sent. When data is sent from the computer to the module, the '''TX''' LED will blink. When data is sent from the module to the paired computer, the '''RX''' LED will blink. You can use this to debug your wiring and connection. | The two blue LEDs are for monitoring the data received & sent. When data is sent from the computer to the module, the '''TX''' LED will blink. When data is sent from the module to the paired computer, the '''RX''' LED will blink. You can use this to debug your wiring and connection. |