thank you all.
I'll try to create a working sketch.

@mfalkvidd
thats very interesting. I thought I can use only examples from MySensors-lib.
Am I right: I use a body of a MySensors example and transform the DallasTemperature->Multiple in this body?

@hek
thanks for your quick answer.
I understand: sending with V_ID. But how to get the ID? I've no idea.
Do you have an example for me because I'm very new to mysensors.

I’ve testet the sketch “DallasTemperatureSensor.ino”. Only info I can see is temperature of each DS18B20. But I can’t see from which DS18B20 this temperature is. One importend thing of 1wire are the unique IDs. Only with these IDs I know from which senser the temperature is.
Is it possible to include these IDs?