Thanks for the answer but i tried all of this several times already and did not solve the problem. When the unit in the apears offline i cant select sleep mode or cycle. But if i start a manual cycle from the unit i see it directly in the app without any delay. But after some time the unit apears offline in the app again. The same as the person who started the topic. I think it is a server problem. I tried different wifi point but same problem and wifi is as strong as it can be,
René