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Chengdu Ebyte Electronic Technology Co.,Ltd. E108-GN User Manual
Copyright ©2012–2021
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Chengdu Ebyte Electronic Technology Co.,Ltd.
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5 Hardware design

For the schematic design of the module, you can directly refer to the E108-GN01-TB-SCH in the data package;
 It is recommended to use a DC regulated power supply to power the module, the power supply ripple should not exceed 50mV, and
the module must be grounded reliably;
 Please pay attention to the correct connection of the positive and negative poles of the power supply, such as reverse connection may
cause permanent damage to the module;
 Please check the power supply to ensure that it is between the recommended power supply voltages. If it exceeds the maximum value,
the module will be permanently damaged;
 The serial port TXD and RXD are LVTTL level, if connected with PC, it needs to be converted by RS232 level. Users can use this
serial port to receive positioning information data and software upgrades;
 This module is a temperature-sensitive device, and its performance will be degraded due to severe temperature changes. Try to keep
away from high-temperature airflow and high-power heating devices during use;
 When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, so that the
whole machine can work stably for a long time;
 The module should be kept away from parts with large electromagnetic interference such as power supply, transformer, and
high-frequency wiring as far as possible. High-frequency digital wiring, high-frequency analog wiring, and power wiring must be
avoided under the module.

Assuming that the module is soldered on the TopLayer, the TopLayer in the contact part of the module is covered with ground copper
(all copper and well grounded), which must be close to the digital part of the module and routed on the BottomLayer;
 Assuming that the module is soldered or placed on the TopLayer, it is also wrong to arbitrarily route wires on the BottomLayer or
other layers, which will affect the stray and receiving sensitivity of the module to varying degrees;

Assuming that there are devices with large electromagnetic interference around the module, it will also greatly affect the performance
of the module. It is recommended to stay away from the module according to the intensity of the interference. If the situation allows,
appropriate isolation and shielding can be done;
 Assuming that there are traces with large electromagnetic interference around the module (high-frequency digital, high-frequency
analog, power traces), it will also greatly affect the performance of the module. It is recommended to stay away from the module
according to the intensity of the interference. Proper isolation and shielding;
 The antenna installation structure has a great influence on the performance of the module, make sure that the antenna is exposed and
preferably vertically upward;

When the module is installed inside the casing, a high-quality antenna extension cable can be used 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.