AT Command Set

Read command

AT^SBC?

Write command

AT^SBC=

<current>

Response

^SBC: <bcs>,<bcl>,<mpc>

<bcs> Connection status of battery pack

<bcl> Battery charge level

While charging is in progress (charging adapter connected) the battery capacity is not available. Consequently, parameter <bcl>=0. To query the battery capacity disconnect the charger.

<mpc> Average power consumption

<mpc> is obtained from the ME's power consumption, plus the value you have specified for the application by using the write command AT^SBC=<current>. Remember that the ME's power consumption varies with its operating mode (IDLE, TALK, DATA, GPRS/DATA) and the power level.

If <current> was not yet specified and no battery pack NTC is detected <mpc> returns only the module's present power consumption.

If <current> was not yet specified, but the NTC of the connected battery pack is detected, an offset value of 200mA will, by default, be added. 200mA is an estimated value which represents the power consumption of a typical external application. Drawn from practical experience it serves as a precaution to ensure proper charging in case you have not entered <current>. It is strongly recommended that you enter the correct power consumption of your application as described below.

Note: If the battery does not incorporate an NTC, or the battery and the NTC are not compliant with the requirements specified in [1], the battery cannot be detected by the ME.

Use the write command to specify the power consumption of your external appli- cation. This information enables the ME to calculate the average power con- sumption <mpc> and to properly control the charging process. If the value is not correct the entire charging process may be affected. Resulting problems may be wrong responses to the AT^SBC read command, overcharging, or the battery does not reach full capacity.

The write command registers the serial port as the output channel for unsolicited result codes related to charging.

When the ME is powered down or reset, the value of <current> is restored to its default. This affects the charging control and disables the presentation of unsolic- ited result codes. Therefore, the parameter should be set every time when needed after rebooting the ME.

Response

OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameter

<current> Enter the current consumption of your application in mA (0...5000). If used, the current provided over the by 2.9V VDD pin of the ZIF in- terface (maximum 70mA) must be added, too.

MC35_ATC_01_V04.00

Page 181 of 238

02.04.2002

Page 180 Page 182
Page 181
Image 181
Siemens MC35 manual Atsbc?, Atsbc=, SBC bcs,bcl,mpc
Page 180 Page 182

MC35 specifications

The Siemens MC35 is a compact and versatile modem designed primarily for mobile communication, data transmission, and machine-to-machine (M2M) applications. Launched in the early 2000s, it quickly became popular due to its blend of performance, reliability, and ease of integration, making it a solid choice for developers and businesses.

One of the key features of the MC35 is its support for GSM and GPRS technologies. This allows it to connect seamlessly to various networks, enabling users to transmit data at speeds that were impressive for its time. The GPRS capability can offer data rates of up to 171.2 kbps, allowing for efficient data transfer even in areas with limited connectivity.

The MC35 is designed to support both SMS and voice functionalities, making it adaptable for a range of applications. This includes remote monitoring, telemetry, and alarm signaling. The ability to send and receive SMS messages is a significant advantage for applications that require immediate alerts and notifications, enhancing its utility in security systems and industrial automation.

Furthermore, the modem is equipped with a range of interfaces, including serial communication (RS232), which makes it compatible with various hardware devices. This facilitates easy integration into existing systems, whether for industrial machinery or consumer electronics. Additionally, it features a robust software development kit (SDK), which enables developers to create custom applications tailored to their specific requirements.

Power consumption is another notable characteristic of the Siemens MC35. It is engineered to be energy-efficient, which is especially important for battery-operated devices or systems that require a prolonged operation without frequent recharging or maintenance.

In terms of physical characteristics, the MC35 is compact and lightweight, allowing it to fit into various enclosure designs without occupying much space. Its durability ensures it can perform reliably in different environments, making it suitable for outdoor and industrial applications.

To summarize, the Siemens MC35 stands out as a reliable modem with a rich feature set that includes GSM and GPRS support, SMS and voice capabilities, easy integration through various interface options, and energy-efficient operation. Its adaptability makes it a valuable tool for a wide array of communication and data transmission tasks, solidifying its place in the evolution of mobile communications technology.
Top Page Image Contents