Whether it is home or enterprise level, due to the limitation of wireless encryption protocol, the transmission power can only be designed in a certain range (like the home-level SHOU router, the signal strength is only about one room).
Therefore, it is impossible to reach the distance of 1 km directly with a wireless router.
In order to achieve this distance, it is necessary to install gain directional antennas for transmitting and receiving signals at both ends. As shown below.