A flashing LED indicates the following status:

• LED is blue and flashing slowly - Ready for connection state.
• LED is red and blue and flashing slowly - Setup state. 
• LED is red and flashing slowly - Unconnected state. 
• LED is red and flashing quickly - Connection is weak. 
• LED is blue and flashing fast and then red - Firmware upgrade. 
• LED is stable: The Device is connected to the Wi-Fi® network.