@AWI But this does lead to another kind of problem. If I want to add another sensor to net and its address is between two another sensors, the sketch will change child_ids to new order.

In the controller head it means that controller thinks that child_id is same sensor and charts gets confused..

This means too that i cannot put sensors one by one.

How should I do this so I can say for real that my sensor one is in livingroom and three sensors are in different bedrooms and so on...

It was easy when I had plaine arduino and lcd witch showed temps one by one...

Just wondering that is it possible to make these sensors (Door) from ATtiny with nrf24l01+ and just pass the communication to arduino which is linked to mysensors networks? This way you don´t have to put mysensors code to little ATtiny.

Just need somebody to figure out communication between arduino and Attiny network....