Java User’s Guide

5.7 Shutdown

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5.7Shutdown

If an unexpected shutdown occurs, data scheduled to be written will get lost due to a buffered write access to the flash file system. The best and safest approach to powering down the mod- ule is to issue the AT^SMSO command. This procedure lets the engine log off from the network and allows the software to enter a secure state and save all data. Further details can be found in [2].

5.7.1Automatic Shutdown

The ME is switched off automatically in different situations:

•under- or overtemperature

•under- or overvoltage

Appropriate warning messages transmitted by the ME to the host application are implemented as URCs. To activate the URCs for temperature conditions use the AT^SCTM command. Und- ervoltage and overvoltage URCs are generated automatically when fault conditions occur.

For further detail refer to the commands AT^SCTM and AT^SBC described in the AT Com- mand Set [1]. In addition, a description of the shutdown procedures can be found in [2].

5.7.2Manual Shutdown

The module can be switched off manually with the AT command, AT^SMSO or when using the TC65 Terminal by pressing the ignition key for a period of time (see [2]). In these cases the midlets destroyApp method is called and the application has 5s time to clean up and call the notifydestroy method. After the 5s the VM is shut down.

5.7.3Restart after Switch Off

When the module is switched off without setting an alarm time (see the AT Command Set [3]), e.g. after a power failure, external hardware must restart the module with the Ignition line (IGT). The Hardware Interface Description [2] explains how to handle a switched off situation.

5.7.4Watchdog

The Watchdog class allows to access the HW watchdog of the system from application level. Depending on the setting (at^scfg) the userware watchdog can do nothing, switch-off or reboot the system.

Watchdog class is only available in TC65.

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2008-02-25

Confidential / Released

 

 

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Siemens XT65, TC65, AC65, XT75 manual Automatic Shutdown, Manual Shutdown, Restart after Switch Off, Watchdog
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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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