Developing the smoke detector network consisted of breaking the design into smaller, workable parts. The current implementation of the wireless smoke detector is constructed using a standard smoke detector, a universal asynchronous receiver transmitter (UART), a Bluetooth development board, and combinational logic that contains both control logic and interface logic. A block diagram showing these blocks and how they link together can be seen in Figure 2 below.

Figure 2: Problem Block Diagram

Each block has a specific function that needs to be integrated within the system. The smoke detector handles the inputs and outputs. It contains a ‘test’ button, the smoke sensor input, and the piezoelectric horn output. It is linked to the combinational logic by lines that send the smoke detector into alert mode and a line that tells the logic that smoke is detected. The combinational logic handles the operation of the system. It determines whether the devices need to be in alert mode, as well as setting up the piconet to which the wireless smoke detectors belong. A UART is used to connect the combinational logic and the Bluetooth development board. This is put in place to help handle the handshaking between the two devices. Following this is the Bluetooth development board. This is our wireless medium that maintains the piconet, handles security, reliability, and data transfer amongst devices. The combination of these blocks creates a system complete with security, reliability, and power consumption considerations.