FLOW 1;
IF contact sensor is ON
THEN start countdown hekje of 30 seconds
FLOW 2;
IF Hekje countdown reaches 0
AND Hekje contact is ON
Then send mobile message
FLOW 1;
IF contact sensor is ON
THEN start countdown hekje of 30 seconds
FLOW 2;
IF Hekje countdown reaches 0
AND Hekje contact is ON
Then send mobile message