Java User’s Guide

4.2 Interfaces

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4.2.7GPS

The on-board GPS functionality can be accessed in 4 different ways from a Java application.

•AT commands via ATCommand

•Java API JSR179

•transparent via CommConnection

•transparent via ATCommand

It is discouraged to use the forth possibility since it uses up a valuable ATCommand instance. Use Java API for non-transparent, use CommConnection for transparent GPS access. Trans- parent and non-transparent modes can not be used concurrently but it is possible and in some cases may be necessary to use AT commands concurrently with the Java API e.g. for GPS power saving modes. For details about AT command related GPS functionality see [1].

The usage of CommConnection for GPS access is very straight forward. Calling Connec- tor.open with port-id “gps0” opens a transparent channel to the GPS module. Then all protocols supported by the GPS hardware can be used.

The Java location API (JSR179) offers three basic functionalities (for details see [3]):

•location listener, a periodic call-back with current location information

•proximity listener, a call-back when a specified location is close

•landmark store, a storage for landmarks/way-points

The landmark store is persistent. The stores are saved to FFS under a:/lmstores/store_X.xml, where X is the number of the store (0 is the default store).

There can be 8 stores plus 1 default store each containing up to 100 landmarks in up to 8 cat- egories (“no category” also counts as a category). Using AddressInfo with the landmarks might decrease the maximum number of possible landmarks in a store, depending on the amount of AddressInfo data being used. An IOException indicates that a store is full.

There is only one store active at a time. The current store information is kept in RAM and only written to FFS when the application switches to a different store or terminates. Saving a store might take up to 45s! During this time period the VM is blocked, no processing can be done in parallel.

One of the examples that come with the product CD is a tracking application that uses the Java location API.

GPS is only supported in XT75/XT65.

Products with GPS do not feature ASC1. So System.out is set to “null” device by default (see Section 5.9).

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2008-02-25

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Siemens XT75, TC65, AC65, XT65 manual 7 GPS
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AC65, XT65, XT75, TC65 specifications

The Siemens TC65 is a compact and powerful GSM/GPRS module designed for a wide range of mobile communication applications. With its robust features, the TC65 perfectly meets the growing demands for connectivity in various industries, including automotive, telematics, and industrial automation.

A standout feature of the TC65 is its compact size, allowing it to be easily integrated into various devices without compromising on performance. The module supports GSM (Global System for Mobile Communications) and GPRS (General Packet Radio Service), providing reliable and efficient voice and data transmission.

One of the key technologies incorporated in the TC65 is its integrated TCP/IP stack, which allows for seamless internet connectivity and enables application developers to create IoT solutions with ease. This capability is essential for remote monitoring, data logging, and other applications that require continuous data exchange.

The TC65 also boasts extensive multimedia capabilities, including support for SMS, MMS, and voice calls. This makes it suitable for applications that require not only data transmission but also communication features. Additionally, it supports various codecs for voice compression, ensuring high-quality audio in voice applications.

Enhanced security features are another highlight of the TC65. It incorporates comprehensive security protocols to safeguard data transmission, making it suitable for sensitive applications in finance, healthcare, and other critical sectors. The module also includes an integrated SIM application toolbox that supports the development of secure and customizable applications.

For developers, the TC65 offers an easy-to-use software development kit (SDK), simplifying the process of application development. This means that businesses can quickly create and deploy solutions tailored to their specific needs.

The module operates across a wide voltage range and is designed to tolerate challenging environmental conditions, making it ideal for industrial use. It supports various interfaces, including UART, GPIO, and I2C, enabling it to connect with a variety of peripherals and sensors, thus expanding its usability.

In summary, the Siemens TC65 combines compact design, versatile communication capabilities, advanced security features, and developer-friendly resources, making it an excellent choice for anyone looking to implement reliable and sophisticated GSM/GPRS communication in their applications. The TC65 is a valuable asset in the evolving landscape of connected devices and IoT solutions.
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