Chengdu Ebyte Electronic Technology Co., Ltd.
E32-433T20D User Manual
Copyright © 2012–20 22 , Chengdu Ebyte Electronic Technology Co., Ltd.
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8 Hardware Design
It is recommended to use a DC regulated power supply to supply power to the module, the power supply ripple coefficient
should be as small as possible, and the module should be reliably grounded;
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 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;
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 traces, high-frequency analog traces, and power traces must be avoided under the module. If it is
absolutely necessary to pass under the module, assuming that the module is soldered on the Top Layer, the top layer of the
contact part of the module should be covered with ground copper (all copper). And well grounded), it must be close to the digital
part of the module and routed on the Bottom Layer ;
Assuming that the module is soldered or placed on the Top Layer, it is also wrong to arbitrarily route wires on the Bottom Layer
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 strength 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. isolation and shielding;
If the communication line uses 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a risk of
damage) ;
Try to stay away from some TTL protocols whose physical layer is also 2.4GHz, for example: USB3.0;
The antenna installation structure has a great influence on the performance of the module, and it is necessary to ensure 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 reduce the transmission distance.
