At first i was getting quiet a good range, but now im getting few meters(testing in the same place) when compared to last.So please help me with where im doing wrong and where is the issue?
the mantra of RF guys: solve RF problems with antennas first. they are cheap, they are easy, and they produce the greatest effect for the least cost and effort433 mhz is also a ham band. googling 70 cm antenna will keep you busy all day.homebrew antenna projectsshort and simple: one to one, fixed locations, use directional gain antennas on both endsone to many, fixed locations, use an omnidirectional antenna on the one end and directional on the manyone to any, mobile, useomnidirectional antennasthe easiest omnidirectional gain antenna to build and use is the collinear. good for up to 15 db of gain. anyone claiming more has knowledge of the laws of physics he is not sharing, or he is a liarthe benefits of gain antennas work equally well on both ends of a link. if you stick up a 15 dbi gain antenna, every link gets 13 db gain over a standard issue 2.14 dbi gain dipole, on both ends
The only thing that got changed while testing is a neighborhood 1 floor building is demolished and they are building a new one of 4 floors.When the old building was there i was getting good range(keeping transmitter in our building). But in new one I'm not getting range even in our building(which i was getting earlier).
I'm interested to know which are the factors affecting the range.
Ultimately the forum cannot tell why your modules are not working as you expect. Trying to work out what may be different in a building is probably a waste of time. You need to test and compare how your various modules perform in uniform conditions, a large open space for instance. With a decent spectrum analyzer you can measure what is going on in the lab.