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The red LED inside the box will flash or light up when the power is on. If there is
no flash or long light, there is no power supply to the box.
Red LED Blink = Bluetooth is not connected
Red LED Long light = Bluetooth is connected
4. After the Bluetooth pairing is completed, the APRS program can be used in conjunction
with (NMEA WAYPOINT format).
The APRS program
APRSDROID is set as follows：
Connection protocol selection: NMEA waypoint
Link type selection:
Bluetooth SPP
Device selection: FT400BT-SPP