IV RESULT AND ANALYSIS

In this part, we explain the results and analyze the data. Table 1 shows the result for the lamp controlled by smartphone. The ability of Bluetooth signals to transmit and receive data was analyzed in Table 2.

For this system, the inputs are set to 1 and 0. 1 is for turn on the lamp. While 0 is for turn off the lamp. Input from the user will be captured and will be sent to the Arduino. We troubleshoot each input button to make sure the circuits are functioning well. From the evaluation, all the circuit are functioning and working according to the programming that have been done in the Android and Arduino. Also our input system is not a very sensitive system. Therefore we can ensure there is no disruption that can disturb the signal processing. This shows that the software and hardware part are fully synchronized as shown in Table 1.

Table 1. Results for each input using the touch screen button

Input Result

1Lamp ON

0Lamp OFF

There are three (3) different types of measurements have been done; (i) indoor and, (ii) outdoor with non-obstacle area and (iii) indoor with obstacle area. As shown in Table 2, for indoor and outdoor without obstacle, the maximum distance that Bluetooth can detect the signal from smartphone is around 12 meter. On the other hand, for indoor with obstacle, the system only communicate between input and output at a distance under 10 meter. As we can see, the effectiveness of signal processing is reduced for an obstacle area.

Table 2. Signal strength for different location

Area Distance (m)Connected/

Intermittent/Disconnected

Indoor (non-obstacle)

1 Connected5 Connected

10 Connected12 Intermittent15 Disconnected

outdoor (non-obstacle)

1 Connected5 Connected

10 Connected12 Intermittent15 Disconnected

Indoor (obstacle)

1 Connected5 Connected

10 Intermittent12 Disconnected15 Disconnected

IV CONCLUSION AND FUTURE WORKS

The goal of this device is to propose a system that can help disabled or busy people to turn on lamp wirelessly using Android smartphone. The range,security and price aspects were considered through the use of Bluetooth technology that is embedded in the mobile device. The system was able to turn on or off the lamp from a distance under 12 meter by just pressing a button on a smartphone.

In future, the device should offer assistance in controlling more lamp, windows and basic home electronic appliances. Wifi module should also be considered to solve the lack of range in our system.