User Manual

command

AT#GPIO=6,0,2<cr>

response:

In this case, the GPIO6 pin was successfully put in alarm output direction.

The Telit HE910V2 family provides a Real Time Clock and Alarm embedded in the product;

it is therefore possible to set-up the proper time, check the actual time, set-up an alarm time at

which the alarm will be triggered with various behavior depending on the +CALA setting.

The only requirement is that the power input to the Telit HE910V2 family has to be

guaranteed without interruptions, the Telit HE910V2 family has no backup battery; therefore

it will lose the time setting if its power supply is interrupted.

On Alarm trigger the Telit HE910V2 family can:

 automatically Wake-up fully operative from shutdown as if the ON/OFF

 automatically Wake-up from shutdown in a special status namely "alarm status"

where it will not look for or try to register into any network, as if it would be off,

except from the fact that it proceeds with the alarm action and it can receive

commands to return completely operative or shutdown immediately.

 If already ON at alarm trigger time, simply proceed with the Alarm action

Once Woken-up the Telit HE910V2 family proceeds with the chosen action that can be

 issue an unsolicited code "+ALARM: <user_text>" on the serial port until a 90s

timeout expires or a special Wake-up command is received

 play an Alarm tone until a 90s timeout expires or a special Wake-up command is

received

 rise the pin GPIO6 until a 90s timeout expires or a special Wake-up command is

received

 any combination of these actions

With these features, the Telit HE910V2 family for example can:

 Wake-up itself and its controlling hardware by using the GPIO6 pin at the desired

time, so timely surveys can be programmed without the need to keep the any

hardware on and therefore reducing power consumption to a minimum.

 Activate some special hardware on time trigger event with the GPIO6 pin.

 Alert the controlling application that the alarm time has come with the unsolicited

code "+ALARM:<user_text>".

 Alert the user with the alarm tone played.

Before using the Alarm feature, you must regulate the internal clock.