wireless monitoring system of gas detector - Faculty of Electrical ...
wireless monitoring system of gas detector - Faculty of Electrical ...
wireless monitoring system of gas detector - Faculty of Electrical ...
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12<br />
From Ohms Law in equation 2.1, voltage value is directly proportional to the<br />
current and resistance value in the circuit. Therefore, as the sensor detect higher <strong>of</strong><br />
concentration <strong>gas</strong> level, resistance value in the grain boundary will increase. As the<br />
resistance increase, the output voltage will also be increase.<br />
2.3.2 Zigbee<br />
Figure 2.7 : Zigbee module<br />
Zigbee <strong>wireless</strong> protocol as shown in Figure 2.7 provides means to network a set<br />
<strong>of</strong> autonomous devices with standard radio frequency transceiver to perform some<br />
networked task. In the proposed <strong>system</strong> a vehicular RF takes the role <strong>of</strong> a Zigbee end<br />
devices while tas reader and writer module takes the role <strong>of</strong> Zigbee coordinates[9].<br />
Zigbee series 1 is used in this projet. To ensure the data are succesfully transfered with<br />
the other Zigbee receiver, some programming needs to be installed for both the zigbee<br />
using X-CTU s<strong>of</strong>tware. This is will be explained further in the chapter 3.
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