Specifications

Configuration:

Using the setup software, we create a behaviour statement that will read as follows:

IF a Voice Call is received from any listed number,

THEN Activate Output 1 for 1 Sec, Pause for 20 Sec, Activate again for 1 Sec.

9.5. Example 5: Contact to Contact relay

In a few instances it may be necessary to transmit the status of a contact to a remote point.

Let us use an alarm as example. If the alarm at your home sounds, you may want a warning

light to switch on in a remote location and a voice call to be placed to a specified number.

For this example, we will use two GSM commander units, one at the local alarm system, and

another at the remote location.

Local GSM Commander Hardware: We connect the alarm output (12V signal that drives the

siren) to one of our inputs as described in section 5.8. The positive wire from the alarm panel

is connected to the IN+ terminal, and the negative wire is connected to IN-.

Local GSM Commander Configuration:

Using the setup software, we create the following behaviour statements:

IF Input Goes Active

THEN send “alarm on” via SMS to +27833341234

IF Input 1 Goes Active

THEN Place Voice Call to +27821121323

IF Input 1 Goes inactive

THEN send “alarm off” via SMS to +27833341234

The above 3 statements detail two actions to trigger in the event that the input goes active.

One is an SMS message to the remote unit, and another is a voice call to a cellphone. In the

above statements, +27833341234 is the number of the GSM commander at the remote

location.

Remote GSM Commander hardware:

We use a second GSM commander unit at the remote location. Here we connect the warning

light to output 1 of the GSM Commander so that if the relay is activated, the warning light will

turn on. (exactly as described in section 5.9)

Remote GSM Commander configuration:

The configuration of the remote unit will be similar to example 2 (control an appliance). Using

the setup software, we create the following behaviour statements:

IF Message is received containing “alarm on”, from number +27831112222,

THEN Activate Output 1.

IF Message is received containing “alarm off”, from number +27831112222,

THEN Deactivate Output 1.

In the above statements, +27831112222 is the number of the local GSM commander.