AT Command Set

Parameter

<time> string type value; format is "yy/MM/dd,hh:mm:ss", where characters indicate year (two last digits), month, day, hour, minutes. E.g. 6th of May 2001, 22:10:00 hours equals to “01/05/06,22:10:00" (see also +CCLK). Note: if <time> equals current date and time or is to an ear- lier date, TA returns +CME ERROR: <21>.

<n> integer type value indicating the array index of the alarm. Index starts with 0. If only this value is returned by the test command, it is default and indicates that only one alarm time is possible; however, if a sec- ond alarm time is set, the previous alarm is deleted.

<type> integer type value indicating the type of the alarm

0Alarm indication: text message via serial interface

<text> string type value indicating the text to be displayed when alarm time is reached; maximum length is <tlength>. After first connection to power supply <text> is undefined.

Note: <text> will be stored to the non-volatile flash memory when the device enters the Power Down mode via AT^SMSO (pg. 191). Once saved, it will be available upon next power-up, until you overwrite it by typing another text. This eliminates the need to enter the full string when setting a fresh alarm and thus, saves memory due to the limited number of flash memory write cycles (e.g. 100.000).

<tlength> integer type value indicating the maximum length of <text>. The maximum length is 16.

Unsolicited result code Indicates reminder call:

+CALA: <text>

Indicates ME wake-up into Alarm mode:

^SSYSTART ALARM MODE +CALA: <text>

If autobauding is active (AT+IPR=0) the URCs ^SSYSTART ALARM MODE and +CALA: <text> do not appear. Therefore, avoid using Alarm mode in con- junction with autobauding.

Reference

GSM 07.07

Note

•<text> should not contain characters which are coded differently in ASCII and GSM (e.g. Ä, Ö, Ü), see also Chapter 9.5.

•In the event of power outage the GSM engine retains the current alarm set- ting, but the RTC will be reset to <time> = “00/01/01,00:00:00” and must be restored after resume of power (see also AT+CCLK, pg. 65. It is only in Power Down mode, that the RTC is kept powered from a dedicated voltage regulator, thus saving the current date and time.

•When the GSM engine wakes up to Alarm mode, the system takes 1s to re- initialize the RTC and to update the current time. Therefore, it is recom- mended to wait 1s before using the AT+CCLK command (for example 1s after ^SSYSTART has been output).

•Please consider when using multiplex mode (+CMUX, pg. 91):

-It is possible to use +CALA with every logical channel (1 – 3).

-The total no. of possible alarm events is shared by all channels. If <n> = 0 is returned by the test command, this indicates that only one common alarm time is possible for all logical channels.

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Siemens MC35 manual Ssystart Alarm Mode +CALA text
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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.
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