Page 366 - ARM Based Microcontroller Projects Using MBED

352 14. ADVANCED PROJECTS

FIG. 14.20 Send command to activate relay 1.

(turned ON or OFF) from an Android mobile phone (or any other device with network
access, e.g., PC or tablet) by sending commands through the Bluetooth interface. The LEDs
are turned ON and OFF by sending commands ONx and OFFx where x is A for LEDA
and B for LEDB.

14.5.2 Aim

The aim of this project is to show how the Nucleo-F411RE development board can com-
municate with external devices using Bluetooth communications.

14.5.3 Block Diagram

The block diagram of the project is shown in Fig. 14.22. The HC-06 Bluetooth module is
used in this project. This is a serial module that can be controlled from the UART of the
development board.