With the accelerated pace of modern life, the continuous improvement of the quality of life, and people's desire for private life, real-time monitoring of family situations is particularly important. At present, the more common method is to install a surveillance camera in a fixed indoor location, which is controlled by a PC. This traditional method is both clumsy and not smart enough; in addition, the data of the real-time monitoring system is not safe enough. The control system studied in this paper utilizes the characteristics of Android intelligent mobile device to realize the intelligentization of data monitoring, and utilizes ZigBee wireless transmission module (SZ05-STD-SMA) with low power consumption, diversified networking forms and strong anti-interference ability. And the transmission distance is relatively far and so on, to achieve the versatility of the actual environmental intelligent monitoring.
1, system architecture designThe intelligent mobile device control system architecture is shown in Figure 1.
Figure 1 Intelligent mobile device control system architecture diagram
2, Android intelligent mobile device data communication module design 2.1, Android intelligent mobile device serial communication designAndroid intelligent device serial communication uses MODBUS communication protocol for data transmission. Through this protocol, it is possible to assemble control devices of different manufacturers into related networks. Considering the consistency issue, the Android Smart Mobile Serial Communication Device parameters are usually set to: Data Bit 8, Stop Bit 1, Parity None, 9600 b/s.
In addition, use the Android ADK development kit to implement the software layer and hardware control layer design. Based on Google's OpenAccessoryProtocol (Open Attachment Protocol), the API is packaged by the USB communication part, and the designer can realize the control of the peripheral mobile device without any effort, thereby realizing the read and write operation of the data by the Android intelligent mobile device through serial communication. .
2.2, Android smart mobile device data acquisition program designThe Android intelligent mobile device control system is composed of a ZigBee wireless transmission module composed of SZ05-STD-SMA and a computer data acquisition system. In order to realize the effective transmission of data, the whole system is deployed under the control of Android intelligent mobile device, and the data collection process of the intelligent mobile device is shown in FIG. 2 .
Figure 2 Intelligent mobile device data collection flow chart
3, Zigbee wireless transmission module designAndroid-based intelligent mobile device control module SZ05-STD-SMA adopts enhanced ZigBee wireless data transmission technology, which can realize RS485/RS232 serial communication and ZigBee wireless communication conversion, and realize data for intelligent mobile device control system. Effective transmission. It is easy to install due to its small size; the communication distance is relatively far, and the barrier-free distance between the two modules can reach 200-2000m; using 2.4G DSSS spread spectrum technology, the anti-interference ability is stronger than other devices; the flexibility of networking is good. The node type and network structure are flexible and diverse, and transparent data transmission between multiple devices can be realized.
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