Specifications

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4 Common Problems
4.1 Communication Failure of Module in Near Distance
 Make sure the sending and receiving configuration is consistent, because inconsistent
configuration will disenable normal communication.

Abnormal voltage: Too low voltage will lead to abnormal sending.
 Low battery: when in low battery, the voltage will be reduced at the time of sending which will
cause abnormal in sending.

Abnormal antenna soldering, RF signal failed to reach the antenna or wrong soldering of π
circuit.
4.2 Abnormal Power Consumption of Module
 The module is damaged due to such reasons as static electricity, resulting in abnormal power
consumption.
 When in receiving at low power, the power consumption of the module does not achieve the
expected effect due to the inaccuracy of timing configuration, etc.

The power consumption of the module fluctuates when the working environment is adverse and
in such extreme environments as high temperature and humidity, as well as low temperature.
4.3 Insufficient Communication Distance of Module

The antenna impedance is not well matched, so the emission power is very low.

Serious signal attenuation due to metal and other things around the antenna or because the
module is in the metal.

Near communication distance of the module due to other interference signals in the testing
environment.
 Abnormal emission power due to not enough power supply.
 The testing environment is adverse, especially the humidity greatly attenuates the 2.4G signals.
 The module goes through the wall and other environments and then communicates with the other
end, the wall greatly attenuates the signals; most signals go around the wall, so the signals are
greatly attenuated.

The module is too close to the ground, absorbed and reflected, and thus the communication
effect is worse.
4.4 Module Authentication
This module has been certified by SRRC (China) and FCC (United States). CMIIT ID number is
xxxxxxxx, and FCC ID number is 2AOFDLSD4BT-K5X.
Three display modes of CMIIT ID and FCC ID are provided. The first shield laser scheme is
defaulted.
1.Shield shield laser: display module product serial number, CMIIT ID, FCC ID, RoHS logo, lierda
registered trademark, CE certification logo, etc., with shield as the specific criterion;
2.Back label: display module product serial number, CMIIT ID, FCC ID, module P/N, lierda
registered trademark, etc, specific to the manufactured product;