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14.5 PROJECT 3—ANDROID—NUCLEO BOARD COMMUNICATION USING BLUETOOTH 357
program. The remainder of the program runs in an endless loop. Inside this loop data (com-
mands) are received from the Bluetooth device using the scanf function and are stored in char-
acter array Buffer. The program then controls the LEDs based on these commands, for
example, ONA turns LEDA ON, ONB turns LEDB ON, OFFA turns OFF LEDA, and OFFB
turns OFF LEDB.

14.5.8 Testing the Program

The program can be tested by using an Android mobile phone to send commands
through a Bluetooth communication interface. There are many freely available Bluetooth
communication programs in the Play Store. The one chosen by the author was called the
Bluetooth Controller by mightyIT (it@memighty.com) as shown in Fig. 14.28. You should

FIG. 14.28 Bluetooth Controller apps.