I ordered 2 additional modules. I regret that there was not a small gesture of goodwill that is done on the 2nd; At installation, curiously one of 2 modulesn'a never able to connect; I returned it and the amazon exchanged against another-which this time without walking parfaitement- bp; very well this exchange procedure. Additional modules allow to have the temperature and CO² in other places of the house, without having to lug the main module, it is all the same good. Only downside; these modules 'measure' not the volume. After all it is not absolutely essential, but I thought it was not the cost of a microphone that would have made the difference. but it does not remove the main interest. app side, ca moved much less correctly. 2 for that work, I had to get back to qlqs time, as the iOS app postponing a pb config. but in fact I gave up and it was actually very well configured. so basically: apparently there are errors msgs cans that may appear - at least in my case.
