Region : Poland

Model : TL-WA5210G

Hardware Version : V1

Firmware Version : Model No. TL-WA5210G

ISP : Netia

hello,
i connected 2 wa5210g but have very dramatic speed drops nin the network, the link will work on around 20mbps for some time 5-30 min then the speed will randomly drop to around 0.25 mbps or "link has been broken off" message. (built in speed test).
the problem is randomly fixed or a couple of reboots will fix it for another 5-30 min.
link is between 200m couple of trees on the way.. antennas shows around 30db signal. using 8dbm power
i tried all possible settings with no positive results.
tried:
bridge mode
client ap mode
all possible security settings
polarization change
all possible channels
site survey finds 32 ap.
if anyone has any ideas how to fix this or what may be causing the problem.