Hi Kenny,
RSSI does not show good efficiency in optimizingthroughput . This is because the wireless communication quality depends on signal interference,
fading and many other effect besides the signal strength itself.
High transmission power gives high signal interference.Low transmission power may increase throughput because of low interference, but small signal power would make shadow areas. We need to choose the correct settings of WiFi network in order to find optimum value of transmission power and signal interference.
Could you share the throughput result and the support info file? Distance between the two nodes?
Thanks
Munish