I bought a Xbee, s1, module. it is 1mW Chip Antenna - Series 1 (802.15.4). it has built-in antenna. I tried to make a communication between PIC microcontroller and MATLAB software. It works very well at small distance e.g. 4 m but if distance becomes larger the communication signal is lost wether was inside or outside. although in the datasheet of Xbee was mentioned that the distance can be 100 m.
also, if the xbee module is moved the signal will be lost at distance larger than 3-4 m and the uart command must be resent again to return the signal [:((] .
I read the power level, it was at the highest level. I only changed the data rate to 115200 bit/sec.moreover, I tried xbees at 9600 bps but with same results which the signal of communication was lost at around 4m.
I chenged (MY) of first xbee to 1 and its (DL) to 2 and (MY) of second xbee to 2 and its (DL) to 1 that means short 16- bit unicast addressing. moreover, I increased (RR) retries but it did not work too where the problem still exists
is usually the signal between two xbee modules lost when any one of them is moved? is this normal??
is there any configuration parameter that I should change???
how can I communicate at 100m or even 50m???
I don’t know what I should do to keep the signal of communication because I’ll use xbee module for a robot ???
would anybody help me??