HC12 Range Issue

Hi,

No i'm not testing in a different building.I'm testing in a same building which i tested before.The only thing changed is neighbour's building.

I thought it is not affecting the range, because i'm not getting communication within our building only(which i was getting earlier). So i was so confused what may be the reason!? Is it that building affecting communication or any other factor!?

Thanks,
Siddesh