Hello! People help the wretched to solve the problem. I bought this device TL-WR845N v4 00000004, software version 0.9.1 3.16 v0283.0 Build 1806 19 Rel. 56190n
Connected set up everything according to the instructions, everything worked perfectly. About a week later, the range of the signal was greatly reduced. Initially I finished on the second floor of the house "I have a private house the device is located on the first floor" in the room 2 floors far from the device, about 75-80 %% of the signal power and now you will go 5 meters to the next room and the signal drops less than 40-50 %% not to mention the second floor there is no WiFi network at all