User Manual

Chengdu Ebyte Electronic Technology Co., Ltd. E180-ZG120A/B Product Specification
Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co., Ltd.
to extend the antenna to the outside of the casing;

The antenna must not be installed inside the metal shell, which will greatly weaken the transmission distance.
5.4 software writing
 The core of this module is EFR32, and its driving method is completely equivalent to EFR32. Users can operate according to the
EFR32 chip manual (see EFR32 manual for details);
 Burning program: The module is a SOC module with its own GPIO port, and the program download uses the J-LINK dedicated
downloader.
Note: After the second burning, the original firmware will not be available!
 Program download interface definition：
pin
J-LINK interface
VCC
VCC
PF0
SWCLK
PF1
SWDIO
GND
GND
6. Common problem
6.1 The transmission distance is not ideal

When there is a straight-line communication obstacle, the communication distance will be correspondingly attenuated;

Temperature, humidity, and co-channel interference will increase the communication packet loss rate;

The ground absorbs and reflects radio waves, and the test effect close to the ground is poor;

Seawater has a strong ability to absorb radio waves, so the seaside test effect is poor;

If there is a metal object near the antenna, or placed in a metal shell, the signal attenuation will be very serious;

The power register is set incorrectly, and the air rate is set too high (the higher the air rate, the closer the distance);

The low voltage of the power supply at room temperature is lower than the recommended value, and the lower the voltage, the
lower the output power;

Poor matching between the antenna and the module or the quality of the antenna itself.
6.2 Module is easily damaged
 Please check the power supply to ensure that it is between the recommended supply voltages, if exceeding the maximum value
will cause permanent damage to the module;
 Please check the stability of the power supply, the voltage should not fluctuate greatly and frequently;
 Please ensure anti-static operation during installation and use, and high-frequency components are electrostatically sensitive;
 Please ensure that the humidity during installation and use should not be too high, and some components are humidity-sensitive
devices;
 If there is no special requirement, it is not recommended to use it at too high or too low temperature.