We using ZW Module - 500 series ZM5202AE-CME3R in our switch application.
The z-wave RF range is decreasing after several months of usage, all other functionality is working fine.
rRF range wont reach even one meter, RSSI value is showing 45-50 in one meter range.
i get know the reason for this failure.
Sounds like the RF signal is very strong. Is it possible for you to measure the RF signals using Spectrum Analyzer?
For Z-Wave 500, the Micro RF LinX can also be used to measure the RSSI values across channels using 'rxsweep' command. For more information about the commands, please see Micro RF LinkX for 500 Series.
The Micro RF LinkX is available at: