You are comparing a temperature with "OFF". I don't think you can do that. But if that is valid then your report may be a duplicate of the issue I reported at http://www.domoticz.com/forum/viewtopic.php?f=62&t=19885&sid=502967abc6254b89455b478e58c96f92 I suggest you log the values you're comparing ...

Hi! Domoticz 3.8153 Raspberry Pi Debian Stretch Various brands of multisensor, all exhibiting the same problem in Blocky I have searched the forum and I think I see what is really this issue reported several times in different ways but never resolved. I think I have found the underlying bug ...

I can't believe that this basic and essential function (concat 2 simple texts) is not possible in blocky in Domoticz ! IT's possible in blocky but not in Domoticz's blocky. What a pity. I regret the near hostile responses you have got from others from what I see as reasonable comment, I would agree ...