AT Command Set

4.2 AT+CALA Set alarm time

Test command

AT+CALA=?

Read command

AT+CALA?

Write command

AT+CALA=<time>

[,<n>[,<type>[,<te

xt>]]]

Test command returns supported array index values <n>, alarm types <type>, and maximum length of the text <tlength> to be output.

Response

+CALA: (list of supported <n>s), (list of supported <type>s), (range of sup- ported <tlength>) OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameter

See write command

Read command returns the list of current active alarm settings in the ME.

Response

+CALA: <time>[,<n>[,<type>[,<text>]]]

If error is related to ME functionality:

+CME ERROR: <err>

Parameter

See write command

The write command sets an alarm time in the ME. When the alarm is timed out and executed the ME returns an Unsolicited Result Code (URC). The alarm call can adopt two functions, depending on whether or not you switch the GSM en- gine off after setting the alarm:

Reminder call: You can use the alarm function as a wake-up or reminder call. For this purpose, set the alarm as described below and do not switch off or power down the ME. When executed the call comes as an Unsolicited Result Code.

Applies to MC35 and MC35 Terminal.

Alarm mode: You can use the alarm call to restart the ME when powered down. For this purpose, set the alarm as described below. Then power down the ME by entering the AT^SMSO command (pg. 191). When the alarm time is reached, the ME will wake up to Alarm mode. To prevent the ME from unintentionally logging into the GSM network, Alarm mode provides restricted opera- tion. Upon wake-up, the ME indicates an Unsolicited Result Code which reads: ^SYSSTART ALARM MODE. A limited number of AT commands is available during Alarm mode: AT+CCLK, AT+CALA, AT^SBC, AT^SCTM, AT^SMSO.

The ME remains deregistered from the GSM network. If you want the ME to return to full operation (normal operating mode) it is necessary to drive the ignition line (IGT pin of ZIF interface) to ground. If your application is battery powered note that charging cannot be started while ME is in Alarm mode. For de- tails please refer to the "Hardware Interface Description" sup- plied with your GSM engine.

Applies to MC35 module only. MC35 Terminal does not support the Alarm mode.

Response

OK

If setting fails:

+CME ERROR: <err> Refer to Chapter 9.1.1, pg. 214, for <err> values.

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Siemens MC35 manual AT+CALA Set alarm time, At+Cala=?, At+Cala?, +CALA time,n,type,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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