4.2 Bluetooth Status LED (PB5)

The Bluetooth status LED (PB5) indicates the Bluetooth Low Energy connection status by specific LED Flash pattern. See the following pattern description.
  • Standby mode – No Bluetooth Low Energy connection. The RNBD350 module is in Advertisement or Scan state. Flash one time every three seconds. (ON: 50 ms, OFF: 2950 ms)
  • Linked Mode – Bluetooth Low Energy ACL link is connected no matter central or peripheral role. Flash two times every 1.5 seconds. (ON: 50 ms, OFF: 150 ms, ON: 50 ms, OFF: 1050 ms)
  • MCU DFU Mode – The RNBD350 module is in the MCU DFU procedure. Flash four times every 2 seconds. (ON: 100 ms, OFF: 100 for each time)
Note: By default, the Bluetooth status LED is turned OFF. The user can enable this feature by using the SR command. For more details on the SR command, refer to Set Application Options.