Modify a small sms script

[Kai-Roger]

Hi.

I use this small script on a 1bit group address:

require('user.sms')
sendsms('12345678', 'test sms')

I then get a text message every time the group address value changes between 1 and 0.

What do i have to change in this script to only get a sms when the value is either 1 or 0?

if value = 0, then:
require('user.sms')
sendsms('12345678', 'test sms')

BR
Kai-Roger