Data Sheet

LK8355
Shenzhen Linkiing Tech Co., Ltd 8 / 17 www.linkiing.com
4.4 Precautions for the use of Bluetooth modules
（1） Bluetooth use environment, wireless signal applications are greatly affected by the surrounding environment, such as
trees, metals and other obstacles will have a certain absorption of wireless signal, so that in practical applications, the
distance of data transmission is affected by a certain degree.
（2） Because the Bluetooth module should be equipped with the existing system, placed in the shell, because the metal
housing on the radio frequency signal is shielded. Therefore, it is not recommended to install in a metal housing.
（3） PCB cloth board: Bluetooth module antenna part, because the metal will weaken the function of the antenna, in the
module cloth board, the module antenna (the left and right side of the antenna and front end) under the strictly
prohibited laying and wiring, if you can hollow out better.