Java User’s Guide

5.2 Remote SIM Access

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5.2Remote SIM Access

While Remote SIM Access (RSA) is normally closely coupled with the GSM 07.10 multiplexer there are some things to keep in mind when using it with Java.

Java must not be started when RSA and/or the GSM 07.10 multiplexer is activated.

When activating the RSA mode (AT^SRSA) via a Java AT Command channel while Java is running the parameter <muxChan> of the AT^SRSA command is ignored and RSA is activated on the channel where the command was issued. The Input- and Outputstream can then be used to transfer RSA protocol data.

5.3Power Saving

The module supports several power saving modes which can be configured by the AT com- mand AT+CFUN [1]. Power saving affects the Java application in two ways. First, it limits access to the serial interface (RS-232-API) and the GPIO pins. Second, power saving effi- ciency is directly influenced by the way a Java application is programmed.

Java hardware access limitations:

In NON-CYCLIC SLEEP mode (cfun=0) the serial interface cannot be accessed. Toggling RTS does end NON-CYCLIC SLEEP mode. In CYCLIC SLEEP mode (CFUN=7 or 9) the serial interface can be used with hardware flow control (CTS/RTS).

In all SLEEP modes the GPIO polling frequency is reduced so that only signal changes which are less than 0.2Hz can be detected properly. Furthermore, the signal must be con- stant for at least 2.7s to detect any changes. For further details see AT^SCPOL in [1] or refer to [2].

Java power saving efficiency:

As long as any Java thread is active, power consumption cannot be reduced, regardless whether any SLEEP mode has been activated or not. A Java application designed to be power efficient should not have any unnecessarily active threads (e.g. no busy loops). Threads waiting in a blocking method (e.g. read) do not hinder power saving.

When using networking functionality close all connectors and hang-up the bearer manually (using ATH for circuit switched connections or AT+CGATT=0 in case of GPRS) every time you intend to reduce power consumption. Disable the network idle timeout (=0).

When going to low power mode there always might be a transition time of around 10s till low power consumption state is reached.

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2008-02-25

Confidential / Released

 

 

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Siemens AC65, TC65, XT75, XT65 manual Remote SIM Access, Power Saving

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.